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diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \class QGraphicsItem
+    \brief The QGraphicsItem class is the base class for all graphical
+    items in a QGraphicsScene.
+    \since 4.2
+
+    \ingroup graphicsview-api
+
+    It provides a light-weight foundation for writing your own custom items.
+    This includes defining the item's geometry, collision detection, its
+    painting implementation and item interaction through its event handlers.
+    QGraphicsItem is part of the \l{Graphics View Framework}
+
+    \image graphicsview-items.png
+
+    For convenience, Qt provides a set of standard graphics items for the most
+    common shapes. These are:
+
+    \list
+    \o QGraphicsEllipseItem provides an ellipse item
+    \o QGraphicsLineItem provides a line item
+    \o QGraphicsPathItem provides an arbitrary path item
+    \o QGraphicsPixmapItem provides a pixmap item
+    \o QGraphicsPolygonItem provides a polygon item
+    \o QGraphicsRectItem provides a rectangular item
+    \o QGraphicsSimpleTextItem provides a simple text label item
+    \o QGraphicsTextItem provides an advanced text browser item
+    \endlist
+
+    All of an item's geometric information is based on its local coordinate
+    system. The item's position, pos(), is the only function that does not
+    operate in local coordinates, as it returns a position in parent
+    coordinates. \l {The Graphics View Coordinate System} describes the coordinate
+    system in detail.
+
+    You can set whether an item should be visible (i.e., drawn, and accepting
+    events), by calling setVisible(). Hiding an item will also hide its
+    children. Similarly, you can enable or disable an item by calling
+    setEnabled(). If you disable an item, all its children will also be
+    disabled. By default, items are both visible and enabled. To toggle
+    whether an item is selected or not, first enable selection by setting
+    the ItemIsSelectable flag, and then call setSelected(). Normally,
+    selection is toggled by the scene, as a result of user interaction.
+
+    To write your own graphics item, you first create a subclass of
+    QGraphicsItem, and then start by implementing its two pure virtual public
+    functions: boundingRect(), which returns an estimate of the area painted
+    by the item, and paint(), which implements the actual painting. For
+    example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 0
+
+    The boundingRect() function has many different purposes.
+    QGraphicsScene bases its item index on boundingRect(), and
+    QGraphicsView uses it both for culling invisible items, and for
+    determining the area that needs to be recomposed when drawing
+    overlapping items. In addition, QGraphicsItem's collision
+    detection mechanisms use boundingRect() to provide an efficient
+    cut-off. The fine grained collision algorithm in
+    collidesWithItem() is based on calling shape(), which returns an
+    accurate outline of the item's shape as a QPainterPath.
+
+    QGraphicsScene expects all items boundingRect() and shape() to
+    remain unchanged unless it is notified. If you want to change an
+    item's geometry in any way, you must first call
+    prepareGeometryChange() to allow QGraphicsScene to update its
+    bookkeeping.
+
+    Collision detection can be done in two ways:
+
+    \list 1
+
+    \o Reimplement shape() to return an accurate shape for your item,
+    and rely on the default implementation of collidesWithItem() to do
+    shape-shape intersection. This can be rather expensive if the
+    shapes are complex.
+
+    \o Reimplement collidesWithItem() to provide your own custom item
+    and shape collision algorithm.
+
+    \endlist
+
+    The contains() function can be called to determine whether the item \e
+    contains a point or not. This function can also be reimplemented by the
+    item. The default behavior of contains() is based on calling shape().
+
+    Items can contain other items, and also be contained by other items. All
+    items can have a parent item and a list of children. Unless the item has
+    no parent, its position is in \e parent coordinates (i.e., the parent's
+    local coordinates). Parent items propagate both their position and their
+    transformation to all children.
+
+    \img graphicsview-parentchild.png
+
+    \target Transformations
+    \section1 Transformations
+
+    QGraphicsItem supports projective transformations in addition to its base
+    position, pos(). There are several ways to change an item's transformation.
+    For simple transformations, you can call either of the convenience
+    functions setRotation() or setScale(), or you can pass any transformation
+    matrix to setTransform(). For advanced transformation control you also have
+    the option of setting several combined transformations by calling
+    setTransformations().
+
+    Item transformations accumulate from parent to child, so if both a parent
+    and child item are rotated 90 degrees, the child's total transformation
+    will be 180 degrees. Similarly, if the item's parent is scaled to 2x its
+    original size, its children will also be twice as large. An item's
+    transformation does not affect its own local geometry; all geometry
+    functions (e.g., contains(), update(), and all the mapping functions) still
+    operate in local coordinates. For convenience, QGraphicsItem provides the
+    functions sceneTransform(), which returns the item's total transformation
+    matrix (including its position and all parents' positions and
+    transformations), and scenePos(), which returns its position in scene
+    coordinates. To reset an item's matrix, call resetTransform().
+
+    Certain transformation operations produce a different outcome depending on
+    the order in which they are applied. For example, if you scale an
+    transform, and then rotate it, you may get a different result than if the
+    transform was rotated first. However, the order you set the transformation
+    properties on QGraphicsItem does not affect the resulting transformation;
+    QGraphicsItem always applies the properties in a fixed, defined order:
+
+    \list
+    \o The item's base transform is applied (transform())
+    \o The item's transformations list is applied in order (transformations())
+    \o The item is rotated relative to its transform origin point (rotation(), transformOriginPoint())
+    \o The item is scaled relative to its transform origin point (scale(), transformOriginPoint())
+    \endlist
+
+    \section1 Painting
+
+    The paint() function is called by QGraphicsView to paint the item's
+    contents. The item has no background or default fill of its own; whatever
+    is behind the item will shine through all areas that are not explicitly
+    painted in this function.  You can call update() to schedule a repaint,
+    optionally passing the rectangle that needs a repaint. Depending on
+    whether or not the item is visible in a view, the item may or may not be
+    repainted; there is no equivalent to QWidget::repaint() in QGraphicsItem.
+
+    Items are painted by the view, starting with the parent items and then
+    drawing children, in ascending stacking order. You can set an item's
+    stacking order by calling setZValue(), and test it by calling
+    zValue(), where items with low z-values are painted before items with
+    high z-values. Stacking order applies to sibling items; parents are always
+    drawn before their children.
+
+    \section1 Sorting
+
+    All items are drawn in a defined, stable order, and this same order decides
+    which items will receive mouse input first when you click on the scene.
+    Normally you don't have to worry about sorting, as the items follow a
+    "natural order", following the logical structure of the scene.
+
+    An item's children are stacked on top of the parent, and sibling items are
+    stacked by insertion order (i.e., in the same order that they were either
+    added to the scene, or added to the same parent). If you add item A, and
+    then B, then B will be on top of A. If you then add C, the items' stacking
+    order will be A, then B, then C.
+
+    \image graphicsview-zorder.png
+
+    This example shows the stacking order of all limbs of the robot from the
+    \l{graphicsview/dragdroprobot}{Drag and Drop Robot} example. The torso is
+    the root item (all other items are children or descendants of the torso),
+    so it is drawn first. Next, the head is drawn, as it is the first item in
+    the torso's list of children. Then the upper left arm is drawn. As the
+    lower arm is a child of the upper arm, the lower arm is then drawn,
+    followed by the upper arm's next sibling, which is the upper right arm, and
+    so on.
+
+    For advanced users, there are ways to alter how your items are sorted:
+
+    \list
+    \o You can call setZValue() on an item to explicitly stack it on top of, or
+    under, other sibling items. The default Z value for an item is 0. Items
+    with the same Z value are stacked by insertion order.
+
+    \o You can call stackBefore() to reorder the list of children. This will
+    directly modify the insertion order.
+
+    \o You can set the ItemStacksBehindParent flag to stack a child item behind
+    its parent.
+    \endlist
+
+    The stacking order of two sibling items also counts for each item's
+    children and descendant items. So if one item is on top of another, then
+    all its children will also be on top of all the other item's children as
+    well.
+
+    \section1 Events
+
+    QGraphicsItem receives events from QGraphicsScene through the virtual
+    function sceneEvent(). This function distributes the most common events
+    to a set of convenience event handlers:
+
+    \list
+    \o contextMenuEvent() handles context menu events
+    \o focusInEvent() and focusOutEvent() handle focus in and out events
+    \o hoverEnterEvent(), hoverMoveEvent(), and hoverLeaveEvent() handles
+    hover enter, move and leave events
+    \o inputMethodEvent() handles input events, for accessibility support
+    \o keyPressEvent() and keyReleaseEvent() handle key press and release events
+    \o mousePressEvent(), mouseMoveEvent(), mouseReleaseEvent(), and
+    mouseDoubleClickEvent() handles mouse press, move, release, click and
+    doubleclick events
+    \endlist
+
+    You can filter events for any other item by installing event filters. This
+    functionality is separate from Qt's regular event filters (see
+    QObject::installEventFilter()), which only work on subclasses of QObject. After
+    installing your item as an event filter for another item by calling
+    installSceneEventFilter(), the filtered events will be received by the virtual
+    function sceneEventFilter(). You can remove item event filters by calling
+    removeSceneEventFilter().
+
+    \section1 Custom Data
+
+    Sometimes it's useful to register custom data with an item, be it a custom
+    item, or a standard item. You can call setData() on any item to store data
+    in it using a key-value pair (the key being an integer, and the value is a
+    QVariant). To get custom data from an item, call data(). This
+    functionality is completely untouched by Qt itself; it is provided for the
+    user's convenience.
+
+    \sa QGraphicsScene, QGraphicsView, {Graphics View Framework}
+*/
+
+/*!
+    \variable QGraphicsItem::Type
+
+    The type value returned by the virtual type() function in standard
+    graphics item classes in Qt. All such standard graphics item
+    classes in Qt are associated with a unique value for Type,
+    e.g. the value returned by QGraphicsPathItem::type() is 2.
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 18
+*/
+
+/*!
+    \variable QGraphicsItem::UserType
+
+    The lowest permitted type value for custom items (subclasses
+    of QGraphicsItem or any of the standard items). This value is
+    used in conjunction with a reimplementation of QGraphicsItem::type()
+    and declaring a Type enum value. Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 1
+
+    \note UserType = 65536
+*/
+
+/*!
+    \enum QGraphicsItem::GraphicsItemFlag
+
+    This enum describes different flags that you can set on an item to
+    toggle different features in the item's behavior.
+
+    All flags are disabled by default.
+
+    \value ItemIsMovable The item supports interactive movement using
+    the mouse. By clicking on the item and then dragging, the item
+    will move together with the mouse cursor. If the item has
+    children, all children are also moved. If the item is part of a
+    selection, all selected items are also moved. This feature is
+    provided as a convenience through the base implementation of
+    QGraphicsItem's mouse event handlers.
+
+    \value ItemIsSelectable The item supports selection. Enabling this
+    feature will enable setSelected() to toggle selection for the
+    item. It will also let the item be selected automatically as a
+    result of calling QGraphicsScene::setSelectionArea(), by clicking
+    on an item, or by using rubber band selection in QGraphicsView.
+
+    \value ItemIsFocusable The item supports keyboard input focus (i.e., it is
+    an input item). Enabling this flag will allow the item to accept focus,
+    which again allows the delivery of key events to
+    QGraphicsItem::keyPressEvent() and QGraphicsItem::keyReleaseEvent().
+
+    \value ItemClipsToShape The item clips to its own shape. The item cannot
+    draw or receive mouse, tablet, drag and drop or hover events outside its
+    shape. It is disabled by default. This behavior is enforced by
+    QGraphicsView::drawItems() or QGraphicsScene::drawItems(). This flag was
+    introduced in Qt 4.3.
+
+    \value ItemClipsChildrenToShape The item clips the painting of all its
+    descendants to its own shape. Items that are either direct or indirect
+    children of this item cannot draw outside this item's shape. By default,
+    this flag is disabled; children can draw anywhere. This behavior is
+    enforced by QGraphicsView::drawItems() or
+    QGraphicsScene::drawItems(). This flag was introduced in Qt 4.3.
+
+    \value ItemIgnoresTransformations The item ignores inherited
+    transformations (i.e., its position is still anchored to its parent, but
+    the parent or view rotation, zoom or shear transformations are ignored).
+    This flag is useful for keeping text label items horizontal and unscaled,
+    so they will still be readable if the view is transformed.  When set, the
+    item's view geometry and scene geometry will be maintained separately. You
+    must call deviceTransform() to map coordinates and detect collisions in
+    the view. By default, this flag is disabled. This flag was introduced in
+    Qt 4.3. \note With this flag set you can still scale the item itself, and
+    that scale transformation will influence the item's children.
+
+    \value ItemIgnoresParentOpacity The item ignores its parent's opacity. The
+    item's effective opacity is the same as its own; it does not combine with
+    the parent's opacity. This flags allows your item to keep its absolute
+    opacity even if the parent is semitransparent. This flag was introduced in
+    Qt 4.5.
+
+    \value ItemDoesntPropagateOpacityToChildren The item doesn't propagate its
+    opacity to its children. This flag allows you to create a semitransparent
+    item that does not affect the opacity of its children. This flag was
+    introduced in Qt 4.5.
+
+    \value ItemStacksBehindParent The item is stacked behind its parent. By
+    default, child items are stacked on top of the parent item. But setting
+    this flag, the child will be stacked behind it. This flag is useful for
+    drop shadow effects and for decoration objects that follow the parent
+    item's geometry without drawing on top of it. This flag was introduced
+    in Qt 4.5.
+
+    \value ItemUsesExtendedStyleOption The item makes use of either
+    \l{QStyleOptionGraphicsItem::} {exposedRect} or
+    \l{QStyleOptionGraphicsItem::} {matrix} in
+    QStyleOptionGraphicsItem. By default, the
+    \l{QStyleOptionGraphicsItem::} {exposedRect} is initialized to the
+    item's boundingRect() and the
+    \l{QStyleOptionGraphicsItem::}{matrix} is untransformed.  You can
+    enable this flag for the style options to be set up with more
+    fine-grained values.  Note that
+    QStyleOptionGraphicsItem::levelOfDetail is unaffected by this flag
+    and always initialized to 1. Use
+    QStyleOptionGraphicsItem::levelOfDetailFromTransform() if you need
+    a higher value. This flag was introduced in Qt 4.6.
+
+    \value ItemHasNoContents The item does not paint anything (i.e., calling
+    paint() on the item has no effect). You should set this flag on items that
+    do not need to be painted to ensure that Graphics View avoids unnecessary
+    painting preparations. This flag was introduced in Qt 4.6.
+
+    \value ItemSendsGeometryChanges The item enables itemChange()
+    notifications for ItemPositionChange, ItemPositionHasChanged,
+    ItemMatrixChange, ItemTransformChange, ItemTransformHasChanged,
+    ItemRotationChange, ItemRotationHasChanged, ItemScaleChange, ItemScaleHasChanged,
+    ItemTransformOriginPointChange, and ItemTransformOriginPointHasChanged. For
+    performance reasons, these notifications are disabled by default. You must
+    enable this flag to receive notifications for position and transform
+    changes. This flag was introduced in Qt 4.6.
+
+    \value ItemAcceptsInputMethod The item supports input methods typically
+    used for Asian languages.
+    This flag was introduced in Qt 4.6.
+
+    \value ItemNegativeZStacksBehindParent The item automatically
+    stacks behind it's parent if it's z-value is negative. This flag
+    enables setZValue() to toggle ItemStacksBehindParent. This flag
+    was introduced in Qt 4.6.
+
+    \value ItemIsPanel The item is a panel. A panel provides activation and
+    contained focus handling. Only one panel can be active at a time (see
+    QGraphicsItem::isActive()). When no panel is active, QGraphicsScene
+    activates all non-panel items. Window items (i.e.,
+    QGraphicsItem::isWindow() returns true) are panels. This flag was
+    introduced in Qt 4.6.
+
+    \omitvalue ItemIsFocusScope \omit Internal only (for now). \endomit
+
+    \value ItemSendsScenePositionChanges The item enables itemChange()
+    notifications for ItemScenePositionHasChanged. For performance reasons,
+    these notifications are disabled by default. You must enable this flag
+    to receive notifications for scene position changes. This flag was
+    introduced in Qt 4.6.
+
+    \omitvalue ItemStopsClickFocusPropagation \omit The item stops propagating
+    click focus to items underneath when being clicked on. This flag
+    allows you create a non-focusable item that can be clicked on without
+    changing the focus. \endomit
+
+    \omitvalue ItemStopsFocusHandling \omit Same as
+    ItemStopsClickFocusPropagation, but also suppresses focus-out. This flag
+    allows you to completely take over focus handling.
+    This flag was introduced in Qt 4.7. \endomit
+*/
+
+/*!
+    \enum QGraphicsItem::GraphicsItemChange
+
+    This enum describes the state changes that are notified by
+    QGraphicsItem::itemChange(). The notifications are sent as the state
+    changes, and in some cases, adjustments can be made (see the documentation
+    for each change for details).
+
+    Note: Be careful with calling functions on the QGraphicsItem itself inside
+    itemChange(), as certain function calls can lead to unwanted
+    recursion. For example, you cannot call setPos() in itemChange() on an
+    ItemPositionChange notification, as the setPos() function will again call
+    itemChange(ItemPositionChange). Instead, you can return the new, adjusted
+    position from itemChange().
+
+    \value ItemEnabledChange The item's enabled state changes. If the item is
+    presently enabled, it will become disabled, and vice verca. The value
+    argument is the new enabled state (i.e., true or false). Do not call
+    setEnabled() in itemChange() as this notification is delivered. Instead,
+    you can return the new state from itemChange().
+
+    \value ItemEnabledHasChanged The item's enabled state has changed. The
+    value argument is the new enabled state (i.e., true or false). Do not call
+    setEnabled() in itemChange() as this notification is delivered. The return
+    value is ignored.
+
+    \value ItemMatrixChange The item's affine transformation matrix is
+    changing. This value is obsolete; you can use ItemTransformChange instead.
+
+    \value ItemPositionChange The item's position changes. This notification
+    is sent if the ItemSendsGeometryChanges flag is enabled, and when the
+    item's local position changes, relative to its parent (i.e., as a result
+    of calling setPos() or moveBy()). The value argument is the new position
+    (i.e., a QPointF).  You can call pos() to get the original position. Do
+    not call setPos() or moveBy() in itemChange() as this notification is
+    delivered; instead, you can return the new, adjusted position from
+    itemChange(). After this notification, QGraphicsItem immediately sends the
+    ItemPositionHasChanged notification if the position changed.
+
+    \value ItemPositionHasChanged The item's position has changed. This
+    notification is sent if the ItemSendsGeometryChanges flag is enabled, and
+    after the item's local position, relative to its parent, has changed. The
+    value argument is the new position (the same as pos()), and QGraphicsItem
+    ignores the return value for this notification (i.e., a read-only
+    notification).
+
+    \value ItemTransformChange The item's transformation matrix changes. This
+    notification is send if the ItemSendsGeometryChanges flag is enabled, and
+    when the item's local transformation matrix changes (i.e., as a result of
+    calling setTransform(). The value argument is the new matrix (i.e., a
+    QTransform); to get the old matrix, call transform(). Do not call
+    setTransform() or set any of the transformation properties in itemChange()
+    as this notification is delivered; instead, you can return the new matrix
+    from itemChange().  This notification is not sent if you change the
+    transformation properties.
+
+    \value ItemTransformHasChanged The item's transformation matrix has
+    changed either because setTransform is called, or one of the
+    transformation properties is changed. This notification is sent if the
+    ItemSendsGeometryChanges flag is enabled, and after the item's local
+    transformation matrix has changed. The value argument is the new matrix
+    (same as transform()), and QGraphicsItem ignores the return value for this
+    notification (i.e., a read-only notification).
+
+    \value ItemRotationChange The item's rotation property changes. This
+    notification is sent if the ItemSendsGeometryChanges flag is enabled, and
+    when the item's rotation property changes (i.e., as a result of calling
+    setRotation()). The value argument is the new rotation (i.e., a double);
+    to get the old rotation, call rotation(). Do not call setRotation() in
+    itemChange() as this notification is delivered; instead, you can return
+    the new rotation from itemChange().
+
+    \value ItemRotationHasChanged The item's rotation property has changed.
+    This notification is sent if the ItemSendsGeometryChanges flag is enabled,
+    and after the item's rotation property has changed. The value argument is
+    the new rotation (i.e., a double), and QGraphicsItem ignores the return
+    value for this notification (i.e., a read-only notification). Do not call
+    setRotation() in itemChange() as this notification is delivered.
+
+    \value ItemScaleChange The item's scale property changes. This notification
+    is sent if the ItemSendsGeometryChanges flag is enabled, and when the item's
+    scale property changes (i.e., as a result of calling setScale()). The value
+    argument is the new scale (i.e., a double); to get the old scale, call
+    scale(). Do not call setScale() in itemChange() as this notification is
+    delivered; instead, you can return the new scale from itemChange().
+
+    \value ItemScaleHasChanged The item's scale property has changed. This
+    notification is sent if the ItemSendsGeometryChanges flag is enabled, and
+    after the item's scale property has changed. The value argument is the new
+    scale (i.e., a double), and QGraphicsItem ignores the return value for this
+    notification (i.e., a read-only notification). Do not call setScale() in
+    itemChange() as this notification is delivered.
+
+    \value ItemTransformOriginPointChange The item's transform origin point
+    property changes. This notification is sent if the ItemSendsGeometryChanges
+    flag is enabled, and when the item's transform origin point property changes
+    (i.e., as a result of calling setTransformOriginPoint()). The value argument
+    is the new origin point (i.e., a QPointF); to get the old origin point, call
+    transformOriginPoint(). Do not call setTransformOriginPoint() in itemChange()
+    as this notification is delivered; instead, you can return the new transform
+    origin point from itemChange().
+
+    \value ItemTransformOriginPointHasChanged The item's transform origin point
+    property has changed. This notification is sent if the ItemSendsGeometryChanges
+    flag is enabled, and after the item's transform origin point property has
+    changed. The value argument is the new origin point (i.e., a QPointF), and
+    QGraphicsItem ignores the return value for this notification (i.e., a read-only
+    notification). Do not call setTransformOriginPoint() in itemChange() as this
+    notification is delivered.
+
+    \value ItemSelectedChange The item's selected state changes. If the item is
+    presently selected, it will become unselected, and vice verca. The value
+    argument is the new selected state (i.e., true or false). Do not call
+    setSelected() in itemChange() as this notification is delivered; instead, you
+    can return the new selected state from itemChange().
+
+    \value ItemSelectedHasChanged The item's selected state has changed. The
+    value argument is the new selected state (i.e., true or false). Do not
+    call setSelected() in itemChange() as this notification is delivered. The
+    return value is ignored.
+
+    \value ItemVisibleChange The item's visible state changes. If the item is
+    presently visible, it will become invisible, and vice verca. The value
+    argument is the new visible state (i.e., true or false). Do not call
+    setVisible() in itemChange() as this notification is delivered; instead,
+    you can return the new visible state from itemChange().
+
+    \value ItemVisibleHasChanged The item's visible state has changed. The
+    value argument is the new visible state (i.e., true or false). Do not call
+    setVisible() in itemChange() as this notification is delivered. The return
+    value is ignored.
+
+    \value ItemParentChange The item's parent changes. The value argument is
+    the new parent item (i.e., a QGraphicsItem pointer).  Do not call
+    setParentItem() in itemChange() as this notification is delivered;
+    instead, you can return the new parent from itemChange().
+
+    \value ItemParentHasChanged The item's parent has changed. The value
+    argument is the new parent (i.e., a pointer to a QGraphicsItem). Do not
+    call setParentItem() in itemChange() as this notification is
+    delivered. The return value is ignored.
+
+    \value ItemChildAddedChange A child is added to this item. The value
+    argument is the new child item (i.e., a QGraphicsItem pointer). Do not
+    pass this item to any item's setParentItem() function as this notification
+    is delivered. The return value is unused; you cannot adjust anything in
+    this notification. Note that the new child might not be fully constructed
+    when this notification is sent; calling pure virtual functions on
+    the child can lead to a crash.
+
+    \value ItemChildRemovedChange A child is removed from this item. The value
+    argument is the child item that is about to be removed (i.e., a
+    QGraphicsItem pointer). The return value is unused; you cannot adjust
+    anything in this notification.
+
+    \value ItemSceneChange The item is moved to a new scene. This notification is
+    also sent when the item is added to its initial scene, and when it is removed.
+    The item's scene() is the old scene (or 0 if the item has not been added to a
+    scene yet). The value argument is the new scene (i.e., a QGraphicsScene
+    pointer), or a null pointer if the item is removed from a scene. Do not
+    override this change by passing this item to QGraphicsScene::addItem() as this
+    notification is delivered; instead, you can return the new scene from
+    itemChange(). Use this feature with caution; objecting to a scene change can
+    quickly lead to unwanted recursion.
+
+    \value ItemSceneHasChanged The item's scene has changed. The item's scene() is
+    the new scene. This notification is also sent when the item is added to its
+    initial scene, and when it is removed.The value argument is the new scene
+    (i.e., a pointer to a QGraphicsScene). Do not call setScene() in itemChange()
+    as this notification is delivered. The return value is ignored.
+
+    \value ItemCursorChange The item's cursor changes. The value argument is
+    the new cursor (i.e., a QCursor). Do not call setCursor() in itemChange()
+    as this notification is delivered. Instead, you can return a new cursor
+    from itemChange().
+
+    \value ItemCursorHasChanged The item's cursor has changed. The value
+    argument is the new cursor (i.e., a QCursor). Do not call setCursor() as
+    this notification is delivered. The return value is ignored.
+
+    \value ItemToolTipChange The item's tooltip changes. The value argument is
+    the new tooltip (i.e., a QToolTip). Do not call setToolTip() in
+    itemChange() as this notification is delivered. Instead, you can return a
+    new tooltip from itemChange().
+
+    \value ItemToolTipHasChanged The item's tooltip has changed. The value
+    argument is the new tooltip (i.e., a QToolTip). Do not call setToolTip()
+    as this notification is delivered. The return value is ignored.
+
+    \value ItemFlagsChange The item's flags change. The value argument is the
+    new flags (i.e., a quint32). Do not call setFlags() in itemChange() as
+    this notification is delivered. Instead, you can return the new flags from
+    itemChange().
+
+    \value ItemFlagsHaveChanged The item's flags have changed. The value
+    argument is the new flags (i.e., a quint32). Do not call setFlags() in
+    itemChange() as this notification is delivered. The return value is
+    ignored.
+
+    \value ItemZValueChange The item's Z-value changes. The value argument is
+    the new Z-value (i.e., a double). Do not call setZValue() in itemChange()
+    as this notification is delivered. Instead, you can return a new Z-value
+    from itemChange().
+
+    \value ItemZValueHasChanged The item's Z-value has changed. The value
+    argument is the new Z-value (i.e., a double). Do not call setZValue() as
+    this notification is delivered. The return value is ignored.
+
+    \value ItemOpacityChange The item's opacity changes. The value argument is
+    the new opacity (i.e., a double). Do not call setOpacity() in itemChange()
+    as this notification is delivered. Instead, you can return a new opacity
+    from itemChange().
+
+    \value ItemOpacityHasChanged The item's opacity has changed. The value
+    argument is the new opacity (i.e., a double). Do not call setOpacity() as
+    this notification is delivered. The return value is ignored.
+
+    \value ItemScenePositionHasChanged The item's scene position has changed.
+    This notification is sent if the ItemSendsScenePositionChanges flag is
+    enabled, and after the item's scene position has changed (i.e., the
+    position or transformation of the item itself or the position or
+    transformation of any ancestor has changed). The value argument is the
+    new scene position (the same as scenePos()), and QGraphicsItem ignores
+    the return value for this notification (i.e., a read-only notification).
+*/
+
+/*!
+    \enum QGraphicsItem::CacheMode
+    \since 4.4
+
+    This enum describes QGraphicsItem's cache modes. Caching is used to speed
+    up rendering by allocating and rendering to an off-screen pixel buffer,
+    which can be reused when the item requires redrawing. For some paint
+    devices, the cache is stored directly in graphics memory, which makes
+    rendering very quick.
+
+    \value NoCache The default; all item caching is
+    disabled. QGraphicsItem::paint() is called every time the item needs
+    redrawing.
+
+    \value ItemCoordinateCache Caching is enabled for the item's logical
+    (local) coordinate system. QGraphicsItem creates an off-screen pixel
+    buffer with a configurable size / resolution that you can pass to
+    QGraphicsItem::setCacheMode(). Rendering quality will typically degrade,
+    depending on the resolution of the cache and the item transformation.  The
+    first time the item is redrawn, it will render itself into the cache, and
+    the cache is then reused for every subsequent expose. The cache is also
+    reused as the item is transformed. To adjust the resolution of the cache,
+    you can call setCacheMode() again.
+
+    \value DeviceCoordinateCache Caching is enabled at the paint device level,
+    in device coordinates. This mode is for items that can move, but are not
+    rotated, scaled or sheared. If the item is transformed directly or
+    indirectly, the cache will be regenerated automatically. Unlike
+    ItemCoordinateCacheMode, DeviceCoordinateCache always renders at maximum
+    quality.
+
+    \sa QGraphicsItem::setCacheMode()
+*/
+
+/*!
+    \enum QGraphicsItem::Extension
+    \internal
+
+    Note: This is provided as a hook to avoid future problems related
+    to adding virtual functions. See also extension(),
+    supportsExtension() and setExtension().
+*/
+
+/*!
+    \enum QGraphicsItem::PanelModality
+    \since 4.6
+
+    This enum specifies the behavior of a modal panel. A modal panel
+    is one that blocks input to other panels. Note that items that
+    are children of a modal panel are not blocked.
+
+    The values are:
+
+    \value NonModal The panel is not modal and does not block input to
+    other panels. This is the default value for panels.
+
+    \value PanelModal The panel is modal to a single item hierarchy
+    and blocks input to its parent pane, all grandparent panels, and
+    all siblings of its parent and grandparent panels.
+
+    \value SceneModal The window is modal to the entire scene and
+    blocks input to all panels.
+
+    \sa QGraphicsItem::setPanelModality(), QGraphicsItem::panelModality(), QGraphicsItem::ItemIsPanel
+*/
+
+#include "qgraphicsitem.h"
+
+#ifndef QT_NO_GRAPHICSVIEW
+
+#include "qgraphicsscene.h"
+#include "qgraphicsscene_p.h"
+#include "qgraphicssceneevent.h"
+#include "qgraphicsview.h"
+#include "qgraphicswidget.h"
+#include "qgraphicsproxywidget.h"
+#include "qgraphicsscenebsptreeindex_p.h"
+#include <QtCore/qbitarray.h>
+#include <QtCore/qdebug.h>
+#include <QtCore/qpoint.h>
+#include <QtCore/qstack.h>
+#include <QtCore/qtimer.h>
+#include <QtCore/qvariant.h>
+#include <QtCore/qvarlengtharray.h>
+#include <QtCore/qnumeric.h>
+#include <QtGui/qapplication.h>
+#include <QtGui/qbitmap.h>
+#include <QtGui/qpainter.h>
+#include <QtGui/qpainterpath.h>
+#include <QtGui/qpixmapcache.h>
+#include <QtGui/qstyleoption.h>
+#include <QtGui/qevent.h>
+#include <QtGui/qinputcontext.h>
+#include <QtGui/qgraphicseffect.h>
+#ifndef QT_NO_ACCESSIBILITY
+# include "qaccessible.h"
+#endif
+
+#include <private/qgraphicsitem_p.h>
+#include <private/qgraphicswidget_p.h>
+#include <private/qtextcontrol_p.h>
+#include <private/qtextdocumentlayout_p.h>
+#include <private/qtextengine_p.h>
+#include <private/qwidget_p.h>
+#include <private/qapplication_p.h>
+
+#ifdef Q_WS_X11
+#include <private/qt_x11_p.h>
+#include <private/qpixmap_x11_p.h>
+#endif
+
+#include <private/qgesturemanager_p.h>
+
+#include <math.h>
+
+QT_BEGIN_NAMESPACE
+
+static inline void _q_adjustRect(QRect *rect)
+{
+    Q_ASSERT(rect);
+    if (!rect->width())
+        rect->adjust(0, 0, 1, 0);
+    if (!rect->height())
+        rect->adjust(0, 0, 0, 1);
+}
+
+/*
+    ### Move this into QGraphicsItemPrivate
+ */
+class QGraphicsItemCustomDataStore
+{
+public:
+    QMap<const QGraphicsItem *, QMap<int, QVariant> > data;
+};
+Q_GLOBAL_STATIC(QGraphicsItemCustomDataStore, qt_dataStore)
+
+/*!
+    \internal
+
+    Returns a QPainterPath of \a path when stroked with the \a pen.
+    Ignoring dash pattern.
+*/
+static QPainterPath qt_graphicsItem_shapeFromPath(const QPainterPath &path, const QPen &pen)
+{
+    // We unfortunately need this hack as QPainterPathStroker will set a width of 1.0
+    // if we pass a value of 0.0 to QPainterPathStroker::setWidth()
+    const qreal penWidthZero = qreal(0.00000001);
+
+    if (path == QPainterPath())
+        return path;
+    QPainterPathStroker ps;
+    ps.setCapStyle(pen.capStyle());
+    if (pen.widthF() <= 0.0)
+        ps.setWidth(penWidthZero);
+    else
+        ps.setWidth(pen.widthF());
+    ps.setJoinStyle(pen.joinStyle());
+    ps.setMiterLimit(pen.miterLimit());
+    QPainterPath p = ps.createStroke(path);
+    p.addPath(path);
+    return p;
+}
+
+/*!
+    \internal
+
+    Propagates the ancestor flag \a flag with value \a enabled to all this
+    item's children. If \a root is false, the flag is also set on this item
+    (default is true).
+*/
+void QGraphicsItemPrivate::updateAncestorFlag(QGraphicsItem::GraphicsItemFlag childFlag,
+                                           AncestorFlag flag, bool enabled, bool root)
+{
+    Q_Q(QGraphicsItem);
+    if (root) {
+        // For root items only. This is the item that has either enabled or
+        // disabled \a childFlag, or has been reparented.
+        switch (int(childFlag)) {
+        case -2:
+            flag = AncestorFiltersChildEvents;
+            enabled = q->filtersChildEvents();
+            break;
+        case -1:
+            flag = AncestorHandlesChildEvents;
+            enabled = q->handlesChildEvents();
+            break;
+        case QGraphicsItem::ItemClipsChildrenToShape:
+            flag = AncestorClipsChildren;
+            enabled = flags & QGraphicsItem::ItemClipsChildrenToShape;
+            break;
+        case QGraphicsItem::ItemIgnoresTransformations:
+            flag = AncestorIgnoresTransformations;
+            enabled = flags & QGraphicsItem::ItemIgnoresTransformations;
+            break;
+        default:
+            return;
+        }
+
+        if (parent) {
+            // Inherit the enabled-state from our parents.
+            if ((parent->d_ptr->ancestorFlags & flag)
+                    || (int(parent->d_ptr->flags & childFlag) == childFlag)
+                        || (childFlag == -1 && parent->d_ptr->handlesChildEvents)
+                        || (childFlag == -2 && parent->d_ptr->filtersDescendantEvents)) {
+                enabled = true;
+                ancestorFlags |= flag;
+            } else {
+                ancestorFlags &= ~flag;
+            }
+        } else {
+            // Top-level root items don't have any ancestors, so there are no
+            // ancestor flags either.
+            ancestorFlags = 0;
+        }
+    } else {
+        // Don't set or propagate the ancestor flag if it's already correct.
+        if (((ancestorFlags & flag) && enabled) || (!(ancestorFlags & flag) && !enabled))
+            return;
+
+        // Set the flag.
+        if (enabled)
+            ancestorFlags |= flag;
+        else
+            ancestorFlags &= ~flag;
+
+        // Don't process children if the item has the main flag set on itself.
+        if ((childFlag != -1 &&  int(flags & childFlag) == childFlag)
+            || (int(childFlag) == -1 && handlesChildEvents)
+            || (int(childFlag) == -2 && filtersDescendantEvents))
+            return;
+    }
+
+    for (int i = 0; i < children.size(); ++i)
+        children.at(i)->d_ptr->updateAncestorFlag(childFlag, flag, enabled, false);
+}
+
+void QGraphicsItemPrivate::updateAncestorFlags()
+{
+    int flags = 0;
+    if (parent) {
+        // Inherit the parent's ancestor flags.
+        QGraphicsItemPrivate *pd = parent->d_ptr.data();
+        flags = pd->ancestorFlags;
+
+        // Add in flags from the parent.
+        if (pd->filtersDescendantEvents)
+            flags |= AncestorFiltersChildEvents;
+        if (pd->handlesChildEvents)
+            flags |= AncestorHandlesChildEvents;
+        if (pd->flags & QGraphicsItem::ItemClipsChildrenToShape)
+            flags |= AncestorClipsChildren;
+        if (pd->flags & QGraphicsItem::ItemIgnoresTransformations)
+            flags |= AncestorIgnoresTransformations;
+    }
+
+    if (ancestorFlags == flags)
+        return; // No change; stop propagation.
+    ancestorFlags = flags;
+
+    // Propagate to children recursively.
+    for (int i = 0; i < children.size(); ++i)
+        children.at(i)->d_ptr->updateAncestorFlags();
+}
+
+/*!
+    \internal
+
+    Propagates item group membership.
+*/
+void QGraphicsItemPrivate::setIsMemberOfGroup(bool enabled)
+{
+    Q_Q(QGraphicsItem);
+    isMemberOfGroup = enabled;
+    if (!qgraphicsitem_cast<QGraphicsItemGroup *>(q)) {
+        foreach (QGraphicsItem *child, children)
+            child->d_func()->setIsMemberOfGroup(enabled);
+    }
+}
+
+/*!
+    \internal
+
+    Maps any item pos properties of \a event to \a item's coordinate system.
+*/
+void QGraphicsItemPrivate::remapItemPos(QEvent *event, QGraphicsItem *item)
+{
+    Q_Q(QGraphicsItem);
+    switch (event->type()) {
+    case QEvent::GraphicsSceneMouseMove:
+    case QEvent::GraphicsSceneMousePress:
+    case QEvent::GraphicsSceneMouseRelease:
+    case QEvent::GraphicsSceneMouseDoubleClick: {
+        QGraphicsSceneMouseEvent *mouseEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
+        mouseEvent->setPos(item->mapFromItem(q, mouseEvent->pos()));
+        mouseEvent->setLastPos(item->mapFromItem(q, mouseEvent->pos()));
+        for (int i = 0x1; i <= 0x10; i <<= 1) {
+            if (mouseEvent->buttons() & i) {
+                Qt::MouseButton button = Qt::MouseButton(i);
+                mouseEvent->setButtonDownPos(button, item->mapFromItem(q, mouseEvent->buttonDownPos(button)));
+            }
+        }
+        break;
+    }
+    case QEvent::GraphicsSceneWheel: {
+        QGraphicsSceneWheelEvent *wheelEvent = static_cast<QGraphicsSceneWheelEvent *>(event);
+        wheelEvent->setPos(item->mapFromItem(q, wheelEvent->pos()));
+        break;
+    }
+    case QEvent::GraphicsSceneContextMenu: {
+        QGraphicsSceneContextMenuEvent *contextEvent = static_cast<QGraphicsSceneContextMenuEvent *>(event);
+        contextEvent->setPos(item->mapFromItem(q, contextEvent->pos()));
+        break;
+    }
+    case QEvent::GraphicsSceneHoverMove: {
+        QGraphicsSceneHoverEvent *hoverEvent = static_cast<QGraphicsSceneHoverEvent *>(event);
+        hoverEvent->setPos(item->mapFromItem(q, hoverEvent->pos()));
+        break;
+    }
+    default:
+        break;
+    }
+}
+
+/*!
+    \internal
+
+    Maps the point \a pos from scene to item coordinates. If \a view is passed and the item
+    is untransformable, this function will correctly map \a pos from the scene using the
+    view's transformation.
+*/
+QPointF QGraphicsItemPrivate::genericMapFromScene(const QPointF &pos,
+                                                  const QWidget *viewport) const
+{
+    Q_Q(const QGraphicsItem);
+    if (!itemIsUntransformable())
+        return q->mapFromScene(pos);
+    QGraphicsView *view = 0;
+    if (viewport)
+        view = qobject_cast<QGraphicsView *>(viewport->parentWidget());
+    if (!view)
+        return q->mapFromScene(pos);
+    // ### More ping pong than needed.
+    return q->deviceTransform(view->viewportTransform()).inverted().map(view->mapFromScene(pos));
+}
+
+/*!
+    \internal
+
+    Combines this item's position and transform onto \a transform.
+
+    If you need to change this function (e.g., adding more transformation
+    modes / options), make sure to change all places marked with COMBINE.
+*/
+void QGraphicsItemPrivate::combineTransformToParent(QTransform *x, const QTransform *viewTransform) const
+{
+    // COMBINE
+    if (viewTransform && itemIsUntransformable()) {
+        *x = q_ptr->deviceTransform(*viewTransform);
+    } else {
+        if (transformData)
+            *x *= transformData->computedFullTransform();
+        if (!pos.isNull())
+            *x *= QTransform::fromTranslate(pos.x(), pos.y());
+    }
+}
+
+/*!
+    \internal
+
+    Combines this item's position and transform onto \a transform.
+
+    If you need to change this function (e.g., adding more transformation
+    modes / options), make sure to change QGraphicsItem::deviceTransform() as
+    well.
+*/
+void QGraphicsItemPrivate::combineTransformFromParent(QTransform *x, const QTransform *viewTransform) const
+{
+    // COMBINE
+    if (viewTransform && itemIsUntransformable()) {
+        *x = q_ptr->deviceTransform(*viewTransform);
+    } else {
+        x->translate(pos.x(), pos.y());
+        if (transformData)
+            *x = transformData->computedFullTransform(x);
+    }
+}
+
+void QGraphicsItemPrivate::updateSceneTransformFromParent()
+{
+    if (parent) {
+        Q_ASSERT(!parent->d_ptr->dirtySceneTransform);
+        if (parent->d_ptr->sceneTransformTranslateOnly) {
+            sceneTransform = QTransform::fromTranslate(parent->d_ptr->sceneTransform.dx() + pos.x(),
+                                                       parent->d_ptr->sceneTransform.dy() + pos.y());
+        } else {
+            sceneTransform = parent->d_ptr->sceneTransform;
+            sceneTransform.translate(pos.x(), pos.y());
+        }
+        if (transformData) {
+            sceneTransform = transformData->computedFullTransform(&sceneTransform);
+            sceneTransformTranslateOnly = (sceneTransform.type() <= QTransform::TxTranslate);
+        } else {
+            sceneTransformTranslateOnly = parent->d_ptr->sceneTransformTranslateOnly;
+        }
+    } else if (!transformData) {
+        sceneTransform = QTransform::fromTranslate(pos.x(), pos.y());
+        sceneTransformTranslateOnly = 1;
+    } else if (transformData->onlyTransform) {
+        sceneTransform = transformData->transform;
+        if (!pos.isNull())
+            sceneTransform *= QTransform::fromTranslate(pos.x(), pos.y());
+        sceneTransformTranslateOnly = (sceneTransform.type() <= QTransform::TxTranslate);
+    } else if (pos.isNull()) {
+        sceneTransform = transformData->computedFullTransform();
+        sceneTransformTranslateOnly = (sceneTransform.type() <= QTransform::TxTranslate);
+    } else {
+        sceneTransform = QTransform::fromTranslate(pos.x(), pos.y());
+        sceneTransform = transformData->computedFullTransform(&sceneTransform);
+        sceneTransformTranslateOnly = (sceneTransform.type() <= QTransform::TxTranslate);
+    }
+    dirtySceneTransform = 0;
+}
+
+/*!
+    \internal
+
+    This helper function helped us add input method query support in
+    Qt 4.4.1 without having to reimplement the inputMethodQuery()
+    function in QGraphicsProxyWidget. ### Qt 5: Remove. We cannot
+    remove it in 4.5+ even if we do reimplement the function properly,
+    because apps compiled with 4.4 will not be able to call the
+    reimplementation.
+*/
+QVariant QGraphicsItemPrivate::inputMethodQueryHelper(Qt::InputMethodQuery query) const
+{
+    Q_UNUSED(query);
+    return QVariant();
+}
+
+/*!
+    \internal
+
+    Make sure not to trigger any pure virtual function calls (e.g.,
+    prepareGeometryChange) if the item is in its destructor, i.e.
+    inDestructor is 1.
+*/
+void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent, const QVariant *newParentVariant,
+                                               const QVariant *thisPointerVariant)
+{
+    Q_Q(QGraphicsItem);
+    if (newParent == parent)
+        return;
+
+    if (isWidget)
+        static_cast<QGraphicsWidgetPrivate *>(this)->fixFocusChainBeforeReparenting((newParent &&
+                                                        newParent->isWidget()) ? static_cast<QGraphicsWidget *>(newParent) : 0,
+                                                        scene);
+    if (scene) {
+        // Deliver the change to the index
+        if (scene->d_func()->indexMethod != QGraphicsScene::NoIndex)
+            scene->d_func()->index->itemChange(q, QGraphicsItem::ItemParentChange, newParent);
+
+        // Disable scene pos notifications for old ancestors
+        if (scenePosDescendants || (flags & QGraphicsItem::ItemSendsScenePositionChanges))
+            scene->d_func()->setScenePosItemEnabled(q, false);
+    }
+
+    if (subFocusItem && parent) {
+        // Make sure none of the old parents point to this guy.
+        subFocusItem->d_ptr->clearSubFocus(parent);
+    }
+
+    // We anticipate geometry changes. If the item is deleted, it will be
+    // removed from the index at a later stage, and the whole scene will be
+    // updated.
+    if (!inDestructor)
+        q_ptr->prepareGeometryChange();
+
+    if (parent) {
+        // Remove from current parent
+        parent->d_ptr->removeChild(q);
+        if (thisPointerVariant)
+            parent->itemChange(QGraphicsItem::ItemChildRemovedChange, *thisPointerVariant);
+    }
+
+    // Update toplevelitem list. If this item is being deleted, its parent
+    // will be 0 but we don't want to register/unregister it in the TLI list.
+    if (scene && !inDestructor) {
+        if (parent && !newParent) {
+            scene->d_func()->registerTopLevelItem(q);
+        } else if (!parent && newParent) {
+            scene->d_func()->unregisterTopLevelItem(q);
+        }
+    }
+
+    // Ensure any last parent focus scope does not point to this item or any of
+    // its descendents.
+    QGraphicsItem *p = parent;
+    QGraphicsItem *parentFocusScopeItem = 0;
+    while (p) {
+        if (p->d_ptr->flags & QGraphicsItem::ItemIsFocusScope) {
+            // If this item's focus scope's focus scope item points
+            // to this item or a descendent, then clear it.
+            QGraphicsItem *fsi = p->d_ptr->focusScopeItem;
+            if (q_ptr == fsi || q_ptr->isAncestorOf(fsi)) {
+                parentFocusScopeItem = fsi;
+                p->d_ptr->focusScopeItem = 0;
+                fsi->d_ptr->focusScopeItemChange(false);
+            }
+            break;
+        }
+        p = p->d_ptr->parent;
+    }
+
+    // Update graphics effect optimization flag
+    if (newParent && (graphicsEffect || mayHaveChildWithGraphicsEffect))
+        newParent->d_ptr->updateChildWithGraphicsEffectFlagRecursively();
+
+    // Update focus scope item ptr in new scope.
+    QGraphicsItem *newFocusScopeItem = subFocusItem ? subFocusItem : parentFocusScopeItem;
+    if (newFocusScopeItem && newParent) {
+        if (subFocusItem) {
+            // Find the subFocusItem's topmost focus scope.
+            QGraphicsItem *ancestorScope = 0;
+            QGraphicsItem *p = subFocusItem->d_ptr->parent;
+            while (p) {
+                if (p->d_ptr->flags & QGraphicsItem::ItemIsFocusScope)
+                    ancestorScope = p;
+                if (p->d_ptr->flags & QGraphicsItem::ItemIsPanel)
+                    break;
+                p = p->d_ptr->parent;
+            }
+            if (ancestorScope)
+                newFocusScopeItem = ancestorScope;
+        }
+
+        QGraphicsItem *p = newParent;
+        while (p) {
+            if (p->d_ptr->flags & QGraphicsItem::ItemIsFocusScope) {
+                p->d_ptr->focusScopeItem = newFocusScopeItem;
+                newFocusScopeItem->d_ptr->focusScopeItemChange(true);
+                // Ensure the new item is no longer the subFocusItem. The
+                // only way to set focus on a child of a focus scope is
+                // by setting focus on the scope itself.
+                if (subFocusItem && !p->focusItem())
+                    subFocusItem->d_ptr->clearSubFocus();
+                break;
+            }
+            p = p->d_ptr->parent;
+        }
+    }
+
+    // Resolve depth.
+    invalidateDepthRecursively();
+
+    if ((parent = newParent)) {
+        if (parent->d_func()->scene && parent->d_func()->scene != scene) {
+            // Move this item to its new parent's scene
+            parent->d_func()->scene->addItem(q);
+        } else if (!parent->d_func()->scene && scene) {
+            // Remove this item from its former scene
+            scene->removeItem(q);
+        }
+
+        parent->d_ptr->addChild(q);
+        if (thisPointerVariant)
+            parent->itemChange(QGraphicsItem::ItemChildAddedChange, *thisPointerVariant);
+        if (scene) {
+            // Re-enable scene pos notifications for new ancestors
+            if (scenePosDescendants || (flags & QGraphicsItem::ItemSendsScenePositionChanges))
+                scene->d_func()->setScenePosItemEnabled(q, true);
+        }
+
+        // Propagate dirty flags to the new parent
+        markParentDirty(/*updateBoundingRect=*/true);
+
+        // Inherit ancestor flags from the new parent.
+        updateAncestorFlags();
+
+        // Update item visible / enabled.
+        if (parent->d_ptr->visible != visible) {
+            if (!parent->d_ptr->visible || !explicitlyHidden)
+                setVisibleHelper(parent->d_ptr->visible, /* explicit = */ false, /* update = */ false);
+        }
+        if (parent->isEnabled() != enabled) {
+            if (!parent->d_ptr->enabled || !explicitlyDisabled)
+                setEnabledHelper(parent->d_ptr->enabled, /* explicit = */ false, /* update = */ false);
+        }
+
+        // Auto-activate if visible and the parent is active.
+        if (visible && parent->isActive())
+            q->setActive(true);
+    } else {
+        // Inherit ancestor flags from the new parent.
+        updateAncestorFlags();
+
+        if (!inDestructor) {
+            // Update item visible / enabled.
+            if (!visible && !explicitlyHidden)
+                setVisibleHelper(true, /* explicit = */ false);
+            if (!enabled && !explicitlyDisabled)
+                setEnabledHelper(true, /* explicit = */ false);
+        }
+    }
+
+    dirtySceneTransform = 1;
+    if (!inDestructor && (transformData || (newParent && newParent->d_ptr->transformData)))
+        transformChanged();
+
+    // Restore the sub focus chain.
+    if (subFocusItem) {
+        subFocusItem->d_ptr->setSubFocus(newParent);
+        if (parent && parent->isActive())
+            subFocusItem->setFocus();
+    }
+
+    // Deliver post-change notification
+    if (newParentVariant)
+        q->itemChange(QGraphicsItem::ItemParentHasChanged, *newParentVariant);
+
+    if (isObject)
+        emit static_cast<QGraphicsObject *>(q)->parentChanged();
+}
+
+/*!
+    \internal
+
+    Returns the bounding rect of this item's children (excluding itself).
+*/
+void QGraphicsItemPrivate::childrenBoundingRectHelper(QTransform *x, QRectF *rect, QGraphicsItem *topMostEffectItem)
+{
+    Q_Q(QGraphicsItem);
+
+    QRectF childrenRect;
+    QRectF *result = rect;
+    rect = &childrenRect;
+    const bool setTopMostEffectItem = !topMostEffectItem;
+
+    for (int i = 0; i < children.size(); ++i) {
+        QGraphicsItem *child = children.at(i);
+        QGraphicsItemPrivate *childd = child->d_ptr.data();
+        if (setTopMostEffectItem)
+            topMostEffectItem = child;
+        bool hasPos = !childd->pos.isNull();
+        if (hasPos || childd->transformData) {
+            // COMBINE
+            QTransform matrix = childd->transformToParent();
+            if (x)
+                matrix *= *x;
+            *rect |= matrix.mapRect(child->d_ptr->effectiveBoundingRect(topMostEffectItem));
+            if (!childd->children.isEmpty())
+                childd->childrenBoundingRectHelper(&matrix, rect, topMostEffectItem);
+        } else {
+            if (x)
+                *rect |= x->mapRect(child->d_ptr->effectiveBoundingRect(topMostEffectItem));
+            else
+                *rect |= child->d_ptr->effectiveBoundingRect(topMostEffectItem);
+            if (!childd->children.isEmpty())
+                childd->childrenBoundingRectHelper(x, rect, topMostEffectItem);
+        }
+    }
+
+    if (flags & QGraphicsItem::ItemClipsChildrenToShape){
+        if (x)
+            *rect &= x->mapRect(q->boundingRect());
+        else
+            *rect &= q->boundingRect();
+    }
+
+    *result |= *rect;
+}
+
+void QGraphicsItemPrivate::initStyleOption(QStyleOptionGraphicsItem *option, const QTransform &worldTransform,
+                                           const QRegion &exposedRegion, bool allItems) const
+{
+    Q_ASSERT(option);
+    Q_Q(const QGraphicsItem);
+
+    // Initialize standard QStyleOption values.
+    const QRectF brect = q->boundingRect();
+    option->state = QStyle::State_None;
+    option->rect = brect.toRect();
+    option->levelOfDetail = 1;
+    option->exposedRect = brect;
+    if (selected)
+        option->state |= QStyle::State_Selected;
+    if (enabled)
+        option->state |= QStyle::State_Enabled;
+    if (q->hasFocus())
+        option->state |= QStyle::State_HasFocus;
+    if (scene) {
+        if (scene->d_func()->hoverItems.contains(q_ptr))
+            option->state |= QStyle::State_MouseOver;
+        if (q == scene->mouseGrabberItem())
+            option->state |= QStyle::State_Sunken;
+    }
+
+    if (!(flags & QGraphicsItem::ItemUsesExtendedStyleOption))
+        return;
+
+    // Initialize QStyleOptionGraphicsItem specific values (matrix, exposedRect).
+    option->matrix = worldTransform.toAffine(); //### discards perspective
+
+    if (!allItems) {
+        // Determine the item's exposed area
+        option->exposedRect = QRectF();
+        const QTransform reverseMap = worldTransform.inverted();
+        const QVector<QRect> exposedRects(exposedRegion.rects());
+        for (int i = 0; i < exposedRects.size(); ++i) {
+            option->exposedRect |= reverseMap.mapRect(QRectF(exposedRects.at(i)));
+            if (option->exposedRect.contains(brect))
+                break;
+        }
+        option->exposedRect &= brect;
+    }
+}
+
+/*!
+    \internal
+
+    Empty all cached pixmaps from the pixmap cache.
+*/
+void QGraphicsItemCache::purge()
+{
+    QPixmapCache::remove(key);
+    key = QPixmapCache::Key();
+    QMutableMapIterator<QPaintDevice *, DeviceData> it(deviceData);
+    while (it.hasNext()) {
+        DeviceData &data = it.next().value();
+        QPixmapCache::remove(data.key);
+        data.cacheIndent = QPoint();
+    }
+    deviceData.clear();
+    allExposed = true;
+    exposed.clear();
+}
+
+/*!
+    Constructs a QGraphicsItem with the given \a parent item.
+    It does not modify the parent object returned by QObject::parent().
+
+    If \a parent is 0, you can add the item to a scene by calling
+    QGraphicsScene::addItem(). The item will then become a top-level item.
+
+    \sa QGraphicsScene::addItem(), setParentItem()
+*/
+QGraphicsItem::QGraphicsItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                             // obsolete argument
+                             , QGraphicsScene *scene
+#endif
+    )
+    : d_ptr(new QGraphicsItemPrivate)
+{
+    d_ptr->q_ptr = this;
+    setParentItem(parent);
+
+    if (scene && parent && parent->scene() != scene) {
+        qWarning("QGraphicsItem::QGraphicsItem: ignoring scene (%p), which is"
+                 " different from parent's scene (%p)",
+                 scene, parent->scene());
+        return;
+    }
+    if (scene && !parent)
+        scene->addItem(this);
+}
+
+/*!
+    \internal
+*/
+QGraphicsItem::QGraphicsItem(QGraphicsItemPrivate &dd, QGraphicsItem *parent,
+                             QGraphicsScene *scene)
+    : d_ptr(&dd)
+{
+    d_ptr->q_ptr = this;
+    setParentItem(parent);
+
+    if (scene && parent && parent->scene() != scene) {
+        qWarning("QGraphicsItem::QGraphicsItem: ignoring scene (%p), which is"
+                 " different from parent's scene (%p)",
+                 scene, parent->scene());
+        return;
+    }
+    if (scene && !parent)
+        scene->addItem(this);
+}
+
+/*!
+    Destroys the QGraphicsItem and all its children. If this item is currently
+    associated with a scene, the item will be removed from the scene before it
+    is deleted.
+
+    \note It is more efficient to remove the item from the QGraphicsScene before
+    destroying the item.
+*/
+QGraphicsItem::~QGraphicsItem()
+{
+    if (d_ptr->isObject) {
+        QGraphicsObject *o = static_cast<QGraphicsObject *>(this);
+        QObjectPrivate *p = QObjectPrivate::get(o);
+        p->wasDeleted = true;
+        if (p->declarativeData) {
+            QAbstractDeclarativeData::destroyed(p->declarativeData, o);
+            p->declarativeData = 0;
+        }
+    }
+
+    d_ptr->inDestructor = 1;
+    d_ptr->removeExtraItemCache();
+
+#ifndef QT_NO_GESTURES
+    if (d_ptr->isObject && !d_ptr->gestureContext.isEmpty()) {
+        QGraphicsObject *o = static_cast<QGraphicsObject *>(this);
+        if (QGestureManager *manager = QGestureManager::instance()) {
+            foreach (Qt::GestureType type, d_ptr->gestureContext.keys())
+                manager->cleanupCachedGestures(o, type);
+        }
+    }
+#endif
+
+    clearFocus();
+
+    // Update focus scope item ptr.
+    QGraphicsItem *p = d_ptr->parent;
+    while (p) {
+        if (p->flags() & ItemIsFocusScope) {
+            if (p->d_ptr->focusScopeItem == this)
+                p->d_ptr->focusScopeItem = 0;
+            break;
+        }
+        p = p->d_ptr->parent;
+    }
+
+    if (!d_ptr->children.isEmpty()) {
+        while (!d_ptr->children.isEmpty())
+            delete d_ptr->children.first();
+        Q_ASSERT(d_ptr->children.isEmpty());
+    }
+
+    if (d_ptr->scene) {
+        d_ptr->scene->d_func()->removeItemHelper(this);
+    } else {
+        d_ptr->resetFocusProxy();
+        setParentItem(0);
+    }
+
+#ifndef QT_NO_GRAPHICSEFFECT
+    delete d_ptr->graphicsEffect;
+#endif //QT_NO_GRAPHICSEFFECT
+    if (d_ptr->transformData) {
+        for(int i = 0; i < d_ptr->transformData->graphicsTransforms.size(); ++i) {
+            QGraphicsTransform *t = d_ptr->transformData->graphicsTransforms.at(i);
+            static_cast<QGraphicsTransformPrivate *>(t->d_ptr.data())->item = 0;
+            delete t;
+        }
+    }
+    delete d_ptr->transformData;
+
+    if (QGraphicsItemCustomDataStore *dataStore = qt_dataStore())
+        dataStore->data.remove(this);
+}
+
+/*!
+    Returns the current scene for the item, or 0 if the item is not stored in
+    a scene.
+
+    To add or move an item to a scene, call QGraphicsScene::addItem().
+*/
+QGraphicsScene *QGraphicsItem::scene() const
+{
+    return d_ptr->scene;
+}
+
+/*!
+    Returns a pointer to this item's item group, or 0 if this item is not
+    member of a group.
+
+    \sa QGraphicsItemGroup, QGraphicsScene::createItemGroup()
+*/
+QGraphicsItemGroup *QGraphicsItem::group() const
+{
+    if (!d_ptr->isMemberOfGroup)
+        return 0;
+    QGraphicsItem *parent = const_cast<QGraphicsItem *>(this);
+    while ((parent = parent->d_ptr->parent)) {
+        if (QGraphicsItemGroup *group = qgraphicsitem_cast<QGraphicsItemGroup *>(parent))
+            return group;
+    }
+    // Unreachable; if d_ptr->isMemberOfGroup is != 0, then one parent of this
+    // item is a group item.
+    return 0;
+}
+
+/*!
+    Adds this item to the item group \a group. If \a group is 0, this item is
+    removed from any current group and added as a child of the previous
+    group's parent.
+
+    \sa group(), QGraphicsScene::createItemGroup()
+*/
+void QGraphicsItem::setGroup(QGraphicsItemGroup *group)
+{
+    if (!group) {
+        if (QGraphicsItemGroup *group = this->group())
+            group->removeFromGroup(this);
+    } else {
+        group->addToGroup(this);
+    }
+}
+
+/*!
+    Returns a pointer to this item's parent item. If this item does not have a
+    parent, 0 is returned.
+
+    \sa setParentItem(), childItems()
+*/
+QGraphicsItem *QGraphicsItem::parentItem() const
+{
+    return d_ptr->parent;
+}
+
+/*!
+    Returns this item's top-level item. The top-level item is the item's
+    topmost ancestor item whose parent is 0. If an item has no parent, its own
+    pointer is returned (i.e., a top-level item is its own top-level item).
+
+    \sa parentItem()
+*/
+QGraphicsItem *QGraphicsItem::topLevelItem() const
+{
+    QGraphicsItem *parent = const_cast<QGraphicsItem *>(this);
+    while (QGraphicsItem *grandPa = parent->parentItem())
+        parent = grandPa;
+    return parent;
+}
+
+/*!
+    \since 4.6
+
+    Returns a pointer to the item's parent, cast to a QGraphicsObject. returns 0 if the parent item
+    is not a QGraphicsObject.
+
+    \sa parentItem(), childItems()
+*/
+QGraphicsObject *QGraphicsItem::parentObject() const
+{
+    QGraphicsItem *p = d_ptr->parent;
+    return (p && p->d_ptr->isObject) ? static_cast<QGraphicsObject *>(p) : 0;
+}
+
+/*!
+    \since 4.4
+
+    Returns a pointer to the item's parent widget. The item's parent widget is
+    the closest parent item that is a widget.
+
+    \sa parentItem(), childItems()
+*/
+QGraphicsWidget *QGraphicsItem::parentWidget() const
+{
+    QGraphicsItem *p = parentItem();
+    while (p && !p->isWidget())
+        p = p->parentItem();
+    return (p && p->isWidget()) ? static_cast<QGraphicsWidget *>(p) : 0;
+}
+
+/*!
+    \since 4.4
+
+    Returns a pointer to the item's top level widget (i.e., the item's
+    ancestor whose parent is 0, or whose parent is not a widget), or 0 if this
+    item does not have a top level widget. If the item is its own top level
+    widget, this function returns a pointer to the item itself.
+*/
+QGraphicsWidget *QGraphicsItem::topLevelWidget() const
+{
+    if (const QGraphicsWidget *p = parentWidget())
+        return p->topLevelWidget();
+    return isWidget() ? static_cast<QGraphicsWidget *>(const_cast<QGraphicsItem *>(this)) : 0;
+}
+
+/*!
+    \since 4.4
+
+    Returns the item's window, or 0 if this item does not have a window. If
+    the item is a window, it will return itself.  Otherwise it will return the
+    closest ancestor that is a window.
+
+    \sa QGraphicsWidget::isWindow()
+*/
+QGraphicsWidget *QGraphicsItem::window() const
+{
+    QGraphicsItem *p = panel();
+    if (p && p->isWindow())
+        return static_cast<QGraphicsWidget *>(p);
+    return 0;
+}
+
+/*!
+    \since 4.6
+
+    Returns the item's panel, or 0 if this item does not have a panel. If the
+    item is a panel, it will return itself. Otherwise it will return the
+    closest ancestor that is a panel.
+
+    \sa isPanel(), ItemIsPanel
+*/
+QGraphicsItem *QGraphicsItem::panel() const
+{
+    if (d_ptr->flags & ItemIsPanel)
+        return const_cast<QGraphicsItem *>(this);
+    return d_ptr->parent ? d_ptr->parent->panel() : 0;
+}
+
+/*!
+  \since 4.6
+
+  Return the graphics item cast to a QGraphicsObject, if the class is actually a
+  graphics object, 0 otherwise.
+*/
+QGraphicsObject *QGraphicsItem::toGraphicsObject()
+{
+    return d_ptr->isObject ? static_cast<QGraphicsObject *>(this) : 0;
+}
+
+/*!
+  \since 4.6
+
+  Return the graphics item cast to a QGraphicsObject, if the class is actually a
+  graphics object, 0 otherwise.
+*/
+const QGraphicsObject *QGraphicsItem::toGraphicsObject() const
+{
+    return d_ptr->isObject ? static_cast<const QGraphicsObject *>(this) : 0;
+}
+
+/*!
+  Sets this item's parent item to \a newParent. If this item already
+  has a parent, it is first removed from the previous parent. If \a
+  newParent is 0, this item will become a top-level item.
+
+  Note that this implicitly adds this graphics item to the scene of
+  the parent. You should not \l{QGraphicsScene::addItem()}{add} the
+  item to the scene yourself.
+
+  Calling this function on an item that is an ancestor of \a newParent
+  have undefined behaviour.
+
+  \sa parentItem(), childItems()
+*/
+void QGraphicsItem::setParentItem(QGraphicsItem *newParent)
+{
+    if (newParent == this) {
+        qWarning("QGraphicsItem::setParentItem: cannot assign %p as a parent of itself", this);
+        return;
+    }
+    if (newParent == d_ptr->parent)
+        return;
+
+    const QVariant newParentVariant(itemChange(QGraphicsItem::ItemParentChange,
+                                               QVariant::fromValue<QGraphicsItem *>(newParent)));
+    newParent = qvariant_cast<QGraphicsItem *>(newParentVariant);
+    if (newParent == d_ptr->parent)
+        return;
+
+    const QVariant thisPointerVariant(QVariant::fromValue<QGraphicsItem *>(this));
+    d_ptr->setParentItemHelper(newParent, &newParentVariant, &thisPointerVariant);
+}
+
+/*!
+    \obsolete
+
+    Use childItems() instead.
+
+    \sa setParentItem()
+*/
+QList<QGraphicsItem *> QGraphicsItem::children() const
+{
+    return childItems();
+}
+
+/*!
+    \since 4.4
+
+    Returns a list of this item's children.
+
+    The items are sorted by stacking order. This takes into account both the
+    items' insertion order and their Z-values.
+
+    \sa setParentItem(), zValue(), {QGraphicsItem#Sorting}{Sorting}
+*/
+QList<QGraphicsItem *> QGraphicsItem::childItems() const
+{
+    const_cast<QGraphicsItem *>(this)->d_ptr->ensureSortedChildren();
+    return d_ptr->children;
+}
+
+/*!
+    \since 4.4
+    Returns true if this item is a widget (i.e., QGraphicsWidget); otherwise,
+    returns false.
+*/
+bool QGraphicsItem::isWidget() const
+{
+    return d_ptr->isWidget;
+}
+
+/*!
+    \since 4.4
+    Returns true if the item is a QGraphicsWidget window, otherwise returns
+    false.
+
+    \sa QGraphicsWidget::windowFlags()
+*/
+bool QGraphicsItem::isWindow() const
+{
+    return d_ptr->isWidget && (static_cast<const QGraphicsWidget *>(this)->windowType() & Qt::Window);
+}
+
+/*!
+    \since 4.6
+    Returns true if the item is a panel; otherwise returns false.
+
+    \sa QGraphicsItem::panel(), ItemIsPanel
+*/
+bool QGraphicsItem::isPanel() const
+{
+    return d_ptr->flags & ItemIsPanel;
+}
+
+/*!
+    Returns this item's flags. The flags describe what configurable features
+    of the item are enabled and not. For example, if the flags include
+    ItemIsFocusable, the item can accept input focus.
+
+    By default, no flags are enabled.
+
+    \sa setFlags(), setFlag()
+*/
+QGraphicsItem::GraphicsItemFlags QGraphicsItem::flags() const
+{
+    return GraphicsItemFlags(d_ptr->flags);
+}
+
+/*!
+    If \a enabled is true, the item flag \a flag is enabled; otherwise, it is
+    disabled.
+
+    \sa flags(), setFlags()
+*/
+void QGraphicsItem::setFlag(GraphicsItemFlag flag, bool enabled)
+{
+    if (enabled)
+        setFlags(GraphicsItemFlags(d_ptr->flags) | flag);
+    else
+        setFlags(GraphicsItemFlags(d_ptr->flags) & ~flag);
+}
+
+/*!
+    \internal
+
+    Sets the flag \a flag on \a item and all its children, to \a enabled.
+*/
+static void _q_qgraphicsItemSetFlag(QGraphicsItem *item, QGraphicsItem::GraphicsItemFlag flag,
+                                    bool enabled)
+{
+    if (item->flags() & flag) {
+        // If this item already has the correct flag set, we don't have to
+        // propagate it.
+        return;
+    }
+    item->setFlag(flag, enabled);
+    foreach (QGraphicsItem *child, item->children())
+        _q_qgraphicsItemSetFlag(child, flag, enabled);
+}
+
+/*!
+    Sets the item flags to \a flags. All flags in \a flags are enabled; all
+    flags not in \a flags are disabled.
+
+    If the item had focus and \a flags does not enable ItemIsFocusable, the
+    item loses focus as a result of calling this function. Similarly, if the
+    item was selected, and \a flags does not enabled ItemIsSelectable, the
+    item is automatically unselected.
+
+    By default, no flags are enabled. (QGraphicsWidget enables the
+    ItemSendsGeometryChanges flag by default in order to track position
+    changes.)
+
+    \sa flags(), setFlag()
+*/
+void QGraphicsItem::setFlags(GraphicsItemFlags flags)
+{
+    // Notify change and check for adjustment.
+    if (quint32(d_ptr->flags) == quint32(flags))
+        return;
+    flags = GraphicsItemFlags(itemChange(ItemFlagsChange, quint32(flags)).toUInt());
+    if (quint32(d_ptr->flags) == quint32(flags))
+        return;
+    if (d_ptr->scene && d_ptr->scene->d_func()->indexMethod != QGraphicsScene::NoIndex)
+        d_ptr->scene->d_func()->index->itemChange(this, ItemFlagsChange, &flags);
+
+    // Flags that alter the geometry of the item (or its children).
+    const quint32 geomChangeFlagsMask = (ItemClipsChildrenToShape | ItemClipsToShape | ItemIgnoresTransformations | ItemIsSelectable);
+    bool fullUpdate = (quint32(flags) & geomChangeFlagsMask) != (d_ptr->flags & geomChangeFlagsMask);
+    if (fullUpdate)
+        d_ptr->updatePaintedViewBoundingRects(/*children=*/true);
+
+    // Keep the old flags to compare the diff.
+    GraphicsItemFlags oldFlags = GraphicsItemFlags(d_ptr->flags);
+
+    // Update flags.
+    d_ptr->flags = flags;
+
+    if (!(d_ptr->flags & ItemIsFocusable) && hasFocus()) {
+        // Clear focus on the item if it has focus when the focusable flag
+        // is unset.
+        clearFocus();
+    }
+
+    if (!(d_ptr->flags & ItemIsSelectable) && isSelected()) {
+        // Unselect the item if it is selected when the selectable flag is
+        // unset.
+        setSelected(false);
+    }
+
+    if ((flags & ItemClipsChildrenToShape) != (oldFlags & ItemClipsChildrenToShape)) {
+        // Item children clipping changes. Propagate the ancestor flag to
+        // all children.
+        d_ptr->updateAncestorFlag(ItemClipsChildrenToShape);
+        // The childrenBoundingRect is clipped to the boundingRect in case of ItemClipsChildrenToShape,
+        // which means we have to invalidate the cached childrenBoundingRect whenever this flag changes.
+        d_ptr->dirtyChildrenBoundingRect = 1;
+        d_ptr->markParentDirty(true);
+    }
+
+    if ((flags & ItemIgnoresTransformations) != (oldFlags & ItemIgnoresTransformations)) {
+        // Item children clipping changes. Propagate the ancestor flag to
+        // all children.
+        d_ptr->updateAncestorFlag(ItemIgnoresTransformations);
+    }
+
+    if ((flags & ItemNegativeZStacksBehindParent) != (oldFlags & ItemNegativeZStacksBehindParent)) {
+        // NB! We change the flags directly here, so we must also update d_ptr->flags.
+        // Note that this has do be done before the ItemStacksBehindParent check
+        // below; otherwise we will loose the change.
+
+        // Update stack-behind.
+        if (d_ptr->z < qreal(0.0))
+            flags |= ItemStacksBehindParent;
+        else
+            flags &= ~ItemStacksBehindParent;
+        d_ptr->flags = flags;
+    }
+
+    if ((flags & ItemStacksBehindParent) != (oldFlags & ItemStacksBehindParent)) {
+        // NB! This check has to come after the ItemNegativeZStacksBehindParent
+        // check above. Be careful.
+
+        // Ensure child item sorting is up to date when toggling this flag.
+        if (d_ptr->parent)
+            d_ptr->parent->d_ptr->needSortChildren = 1;
+        else if (d_ptr->scene)
+            d_ptr->scene->d_func()->needSortTopLevelItems = 1;
+    }
+
+    if ((flags & ItemAcceptsInputMethod) != (oldFlags & ItemAcceptsInputMethod)) {
+        // Update input method sensitivity in any views.
+        if (d_ptr->scene)
+            d_ptr->scene->d_func()->updateInputMethodSensitivityInViews();
+    }
+
+
+    if ((d_ptr->panelModality != NonModal)
+        && d_ptr->scene
+        && (flags & ItemIsPanel) != (oldFlags & ItemIsPanel)) {
+        // update the panel's modal state
+        if (flags & ItemIsPanel)
+            d_ptr->scene->d_func()->enterModal(this);
+        else
+            d_ptr->scene->d_func()->leaveModal(this);
+    }
+
+    if (d_ptr->scene) {
+        if ((flags & ItemSendsScenePositionChanges) != (oldFlags & ItemSendsScenePositionChanges)) {
+            if (flags & ItemSendsScenePositionChanges)
+                d_ptr->scene->d_func()->registerScenePosItem(this);
+            else
+                d_ptr->scene->d_func()->unregisterScenePosItem(this);
+        }
+        d_ptr->scene->d_func()->markDirty(this, QRectF(), /*invalidateChildren=*/true);
+    }
+
+    // Notify change.
+    itemChange(ItemFlagsHaveChanged, quint32(flags));
+}
+
+/*!
+    \since 4.4
+    Returns the cache mode for this item. The default mode is NoCache (i.e.,
+    cache is disabled and all painting is immediate).
+
+    \sa setCacheMode()
+*/
+QGraphicsItem::CacheMode QGraphicsItem::cacheMode() const
+{
+    return QGraphicsItem::CacheMode(d_ptr->cacheMode);
+}
+
+/*!
+    \since 4.4
+    Sets the item's cache mode to \a mode.
+
+    The optional \a logicalCacheSize argument is used only by
+    ItemCoordinateCache mode, and describes the resolution of the cache
+    buffer; if \a logicalCacheSize is (100, 100), QGraphicsItem will fit the
+    item into 100x100 pixels in graphics memory, regardless of the logical
+    size of the item itself. By default QGraphicsItem uses the size of
+    boundingRect(). For all other cache modes than ItemCoordinateCache, \a
+    logicalCacheSize is ignored.
+
+    Caching can speed up rendering if your item spends a significant time
+    redrawing itself. In some cases the cache can also slow down rendering, in
+    particular when the item spends less time redrawing than QGraphicsItem
+    spends redrawing from the cache. When enabled, the item's paint() function
+    will be called only once for each call to update(); for any subsequent
+    repaint requests, the Graphics View framework will redraw from the
+    cache. This approach works particularly well with QGLWidget, which stores
+    all the cache as OpenGL textures.
+
+    Be aware that QPixmapCache's cache limit may need to be changed to obtain
+    optimal performance.
+
+    You can read more about the different cache modes in the CacheMode
+    documentation.
+
+    \sa CacheMode, QPixmapCache::setCacheLimit()
+*/
+void QGraphicsItem::setCacheMode(CacheMode mode, const QSize &logicalCacheSize)
+{
+    CacheMode lastMode = CacheMode(d_ptr->cacheMode);
+    d_ptr->cacheMode = mode;
+    bool noVisualChange = (mode == NoCache && lastMode == NoCache)
+                          || (mode == NoCache && lastMode == DeviceCoordinateCache)
+                          || (mode == DeviceCoordinateCache && lastMode == NoCache)
+                          || (mode == DeviceCoordinateCache && lastMode == DeviceCoordinateCache);
+    if (mode == NoCache) {
+        d_ptr->removeExtraItemCache();
+    } else {
+        QGraphicsItemCache *cache = d_ptr->extraItemCache();
+
+        // Reset old cache
+        cache->purge();
+
+        if (mode == ItemCoordinateCache) {
+            if (lastMode == mode && cache->fixedSize == logicalCacheSize)
+                noVisualChange = true;
+            cache->fixedSize = logicalCacheSize;
+        }
+    }
+    if (!noVisualChange)
+        update();
+}
+
+/*!
+    \since 4.6
+
+    Returns the modality for this item.
+*/
+QGraphicsItem::PanelModality QGraphicsItem::panelModality() const
+{
+    return d_ptr->panelModality;
+}
+
+/*!
+    \since 4.6
+
+    Sets the modality for this item to \a panelModality.
+
+    Changing the modality of a visible item takes effect immediately.
+*/
+void QGraphicsItem::setPanelModality(PanelModality panelModality)
+{
+    if (d_ptr->panelModality == panelModality)
+        return;
+
+    PanelModality previousModality = d_ptr->panelModality;
+    bool enterLeaveModal = (isPanel() && d_ptr->scene && isVisible());
+    if (enterLeaveModal && panelModality == NonModal)
+        d_ptr->scene->d_func()->leaveModal(this);
+    d_ptr->panelModality = panelModality;
+    if (enterLeaveModal && d_ptr->panelModality != NonModal)
+        d_ptr->scene->d_func()->enterModal(this, previousModality);
+}
+
+/*!
+    \since 4.6
+
+    Returns true if this item is blocked by a modal panel, false otherwise. If \a blockingPanel is
+    non-zero, \a blockingPanel will be set to the modal panel that is blocking this item. If this
+    item is not blocked, \a blockingPanel will not be set by this function.
+
+    This function always returns false for items not in a scene.
+
+    \sa panelModality() setPanelModality() PanelModality
+*/
+bool QGraphicsItem::isBlockedByModalPanel(QGraphicsItem **blockingPanel) const
+{
+    if (!d_ptr->scene)
+        return false;
+
+
+    QGraphicsItem *dummy = 0;
+    if (!blockingPanel)
+        blockingPanel = &dummy;
+
+    QGraphicsScenePrivate *scene_d = d_ptr->scene->d_func();
+    if (scene_d->modalPanels.isEmpty())
+        return false;
+
+    // ###
+    if (!scene_d->popupWidgets.isEmpty() && scene_d->popupWidgets.first() == this)
+        return false;
+
+    for (int i = 0; i < scene_d->modalPanels.count(); ++i) {
+        QGraphicsItem *modalPanel = scene_d->modalPanels.at(i);
+        if (modalPanel->panelModality() == QGraphicsItem::SceneModal) {
+            // Scene modal panels block all non-descendents.
+            if (modalPanel != this && !modalPanel->isAncestorOf(this)) {
+                *blockingPanel = modalPanel;
+                return true;
+            }
+        } else {
+            // Window modal panels block ancestors and siblings/cousins.
+            if (modalPanel != this
+                && !modalPanel->isAncestorOf(this)
+                && commonAncestorItem(modalPanel)) {
+                *blockingPanel = modalPanel;
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+#ifndef QT_NO_TOOLTIP
+/*!
+    Returns the item's tool tip, or an empty QString if no tool tip has been
+    set.
+
+    \sa setToolTip(), QToolTip
+*/
+QString QGraphicsItem::toolTip() const
+{
+    return d_ptr->extra(QGraphicsItemPrivate::ExtraToolTip).toString();
+}
+
+/*!
+    Sets the item's tool tip to \a toolTip. If \a toolTip is empty, the item's
+    tool tip is cleared.
+
+    \sa toolTip(), QToolTip
+*/
+void QGraphicsItem::setToolTip(const QString &toolTip)
+{
+    const QVariant toolTipVariant(itemChange(ItemToolTipChange, toolTip));
+    d_ptr->setExtra(QGraphicsItemPrivate::ExtraToolTip, toolTipVariant.toString());
+    itemChange(ItemToolTipHasChanged, toolTipVariant);
+}
+#endif // QT_NO_TOOLTIP
+
+#ifndef QT_NO_CURSOR
+/*!
+    Returns the current cursor shape for the item. The mouse cursor
+    will assume this shape when it's over this item. See the \link
+    Qt::CursorShape list of predefined cursor objects\endlink for a
+    range of useful shapes.
+
+    An editor item might want to use an I-beam cursor:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 2
+
+    If no cursor has been set, the cursor of the item beneath is used.
+
+    \sa setCursor(), hasCursor(), unsetCursor(), QWidget::cursor,
+    QApplication::overrideCursor()
+*/
+QCursor QGraphicsItem::cursor() const
+{
+    return qvariant_cast<QCursor>(d_ptr->extra(QGraphicsItemPrivate::ExtraCursor));
+}
+
+/*!
+    Sets the current cursor shape for the item to \a cursor. The mouse cursor
+    will assume this shape when it's over this item. See the \link
+    Qt::CursorShape list of predefined cursor objects\endlink for a range of
+    useful shapes.
+
+    An editor item might want to use an I-beam cursor:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 3
+
+    If no cursor has been set, the cursor of the item beneath is used.
+
+    \sa cursor(), hasCursor(), unsetCursor(), QWidget::cursor,
+    QApplication::overrideCursor()
+*/
+void QGraphicsItem::setCursor(const QCursor &cursor)
+{
+    const QVariant cursorVariant(itemChange(ItemCursorChange, QVariant::fromValue<QCursor>(cursor)));
+    d_ptr->setExtra(QGraphicsItemPrivate::ExtraCursor, qvariant_cast<QCursor>(cursorVariant));
+    d_ptr->hasCursor = 1;
+    if (d_ptr->scene) {
+        d_ptr->scene->d_func()->allItemsUseDefaultCursor = false;
+        foreach (QGraphicsView *view, d_ptr->scene->views()) {
+            view->viewport()->setMouseTracking(true);
+            // Note: Some of this logic is duplicated in QGraphicsView's mouse events.
+            if (view->underMouse()) {
+                foreach (QGraphicsItem *itemUnderCursor, view->items(view->mapFromGlobal(QCursor::pos()))) {
+                    if (itemUnderCursor->hasCursor()) {
+                        QMetaObject::invokeMethod(view, "_q_setViewportCursor",
+                                                  Q_ARG(QCursor, itemUnderCursor->cursor()));
+                        break;
+                    }
+                }
+                break;
+            }
+        }
+    }
+    itemChange(ItemCursorHasChanged, cursorVariant);
+}
+
+/*!
+    Returns true if this item has a cursor set; otherwise, false is returned.
+
+    By default, items don't have any cursor set. cursor() will return a
+    standard pointing arrow cursor.
+
+    \sa unsetCursor()
+*/
+bool QGraphicsItem::hasCursor() const
+{
+    return d_ptr->hasCursor;
+}
+
+/*!
+    Clears the cursor from this item.
+
+    \sa hasCursor(), setCursor()
+*/
+void QGraphicsItem::unsetCursor()
+{
+    d_ptr->unsetExtra(QGraphicsItemPrivate::ExtraCursor);
+    d_ptr->hasCursor = 0;
+    if (d_ptr->scene) {
+        foreach (QGraphicsView *view, d_ptr->scene->views()) {
+            if (view->underMouse() && view->itemAt(view->mapFromGlobal(QCursor::pos())) == this) {
+                QMetaObject::invokeMethod(view, "_q_unsetViewportCursor");
+                break;
+            }
+        }
+    }
+}
+
+#endif // QT_NO_CURSOR
+
+/*!
+   Returns true if the item is visible; otherwise, false is returned.
+
+   Note that the item's general visibility is unrelated to whether or not it
+   is actually being visualized by a QGraphicsView.
+
+   \sa setVisible()
+*/
+bool QGraphicsItem::isVisible() const
+{
+    return d_ptr->visible;
+}
+
+/*!
+    \since 4.4
+    Returns true if the item is visible to \a parent; otherwise, false is
+    returned. \a parent can be 0, in which case this function will return
+    whether the item is visible to the scene or not.
+
+    An item may not be visible to its ancestors even if isVisible() is true. If
+    any ancestor is hidden, the item itself will be implicitly hidden, in which
+    case this function will return false.
+
+    \sa isVisible(), setVisible()
+*/
+bool QGraphicsItem::isVisibleTo(const QGraphicsItem *parent) const
+{
+    if (!d_ptr->visible)
+        return false;
+    if (parent == this)
+        return true;
+    if (parentItem() && parentItem()->isVisibleTo(parent))
+        return true;
+    if (!parent && !parentItem())
+        return true;
+    return false;
+}
+
+/*!
+    \internal
+
+    Sets this item's visibility to \a newVisible. If \a explicitly is true,
+    this item will be "explicitly" \a newVisible; otherwise, it.. will not be.
+*/
+void QGraphicsItemPrivate::setVisibleHelper(bool newVisible, bool explicitly, bool update)
+{
+    Q_Q(QGraphicsItem);
+
+    // Update explicit bit.
+    if (explicitly)
+        explicitlyHidden = newVisible ? 0 : 1;
+
+    // Check if there's nothing to do.
+    if (visible == quint32(newVisible))
+        return;
+
+    // Don't show child if parent is not visible
+    if (parent && newVisible && !parent->d_ptr->visible)
+        return;
+
+    // Modify the property.
+    const QVariant newVisibleVariant(q_ptr->itemChange(QGraphicsItem::ItemVisibleChange,
+                                                       quint32(newVisible)));
+    newVisible = newVisibleVariant.toBool();
+    if (visible == quint32(newVisible))
+        return;
+    visible = newVisible;
+
+    // Schedule redrawing
+    if (update) {
+        QGraphicsItemCache *c = (QGraphicsItemCache *)qvariant_cast<void *>(extra(ExtraCacheData));
+        if (c)
+            c->purge();
+        if (scene) {
+#ifndef QT_NO_GRAPHICSEFFECT
+            invalidateParentGraphicsEffectsRecursively();
+#endif //QT_NO_GRAPHICSEFFECT
+            scene->d_func()->markDirty(q_ptr, QRectF(), /*invalidateChildren=*/false, /*force=*/true);
+        }
+    }
+
+    // Certain properties are dropped as an item becomes invisible.
+    bool hasFocus = q_ptr->hasFocus();
+    if (!newVisible) {
+        if (scene) {
+            if (scene->d_func()->mouseGrabberItems.contains(q))
+                q->ungrabMouse();
+            if (scene->d_func()->keyboardGrabberItems.contains(q))
+                q->ungrabKeyboard();
+            if (q->isPanel() && panelModality != QGraphicsItem::NonModal)
+                scene->d_func()->leaveModal(q_ptr);
+        }
+        if (hasFocus && scene) {
+            // Hiding the closest non-panel ancestor of the focus item
+            QGraphicsItem *focusItem = scene->focusItem();
+            bool clear = true;
+            if (isWidget && !focusItem->isPanel()) {
+                do {
+                    if (focusItem == q_ptr) {
+                        clear = !static_cast<QGraphicsWidget *>(q_ptr)->focusNextPrevChild(true);
+                        break;
+                    }
+                } while ((focusItem = focusItem->parentWidget()) && !focusItem->isPanel());
+            }
+            if (clear)
+                clearFocusHelper(/* giveFocusToParent = */ false);
+        }
+        if (q_ptr->isSelected())
+            q_ptr->setSelected(false);
+    } else {
+        geometryChanged = 1;
+        paintedViewBoundingRectsNeedRepaint = 1;
+        if (scene) {
+            if (isWidget) {
+                QGraphicsWidget *widget = static_cast<QGraphicsWidget *>(q_ptr);
+                if (widget->windowType() == Qt::Popup)
+                    scene->d_func()->addPopup(widget);
+            }
+            if (q->isPanel() && panelModality != QGraphicsItem::NonModal) {
+                scene->d_func()->enterModal(q_ptr);
+            }
+        }
+    }
+
+    // Update children with explicitly = false.
+    const bool updateChildren = update && !(flags & QGraphicsItem::ItemClipsChildrenToShape);
+    foreach (QGraphicsItem *child, children) {
+        if (!newVisible || !child->d_ptr->explicitlyHidden)
+            child->d_ptr->setVisibleHelper(newVisible, false, updateChildren);
+    }
+
+    // Update activation
+    if (scene && q->isPanel()) {
+        if (newVisible) {
+            if (parent && parent->isActive())
+                q->setActive(true);
+        } else {
+            if (q->isActive())
+                scene->setActivePanel(parent);
+        }
+    }
+
+    // Enable subfocus
+    if (scene) {
+        if (newVisible) {
+            // Item is shown
+            QGraphicsItem *p = parent;
+            bool done = false;
+            while (p) {
+                if (p->flags() & QGraphicsItem::ItemIsFocusScope) {
+                    QGraphicsItem *fsi = p->d_ptr->focusScopeItem;
+                    if (q_ptr == fsi || q_ptr->isAncestorOf(fsi)) {
+                        done = true;
+                        while (fsi->d_ptr->focusScopeItem && fsi->d_ptr->focusScopeItem->isVisible())
+                            fsi = fsi->d_ptr->focusScopeItem;
+                        fsi->d_ptr->setFocusHelper(Qt::OtherFocusReason, /* climb = */ true,
+                                                   /* focusFromHide = */ false);
+                    }
+                    break;
+                }
+                p = p->d_ptr->parent;
+            }
+            if (!done) {
+                QGraphicsItem *fi = subFocusItem;
+                if (fi && fi != scene->focusItem()) {
+                    scene->setFocusItem(fi);
+                } else if (flags & QGraphicsItem::ItemIsFocusScope &&
+                           !scene->focusItem() &&
+                           q->isAncestorOf(scene->d_func()->lastFocusItem)) {
+                    q_ptr->setFocus();
+                }
+            }
+        } else {
+            // Item is hidden
+            if (hasFocus) {
+                QGraphicsItem *p = parent;
+                while (p) {
+                    if (p->flags() & QGraphicsItem::ItemIsFocusScope) {
+                        if (p->d_ptr->visible) {
+                            p->d_ptr->setFocusHelper(Qt::OtherFocusReason, /* climb = */ true,
+                                                     /* focusFromHide = */ true);
+                        }
+                        break;
+                    }
+                    p = p->d_ptr->parent;
+                }
+            }
+        }
+    }
+
+    // Deliver post-change notification.
+    q_ptr->itemChange(QGraphicsItem::ItemVisibleHasChanged, newVisibleVariant);
+
+    if (isObject)
+        emit static_cast<QGraphicsObject *>(q_ptr)->visibleChanged();
+}
+
+/*!
+    If \a visible is true, the item is made visible. Otherwise, the item is
+    made invisible. Invisible items are not painted, nor do they receive any
+    events. In particular, mouse events pass right through invisible items,
+    and are delivered to any item that may be behind. Invisible items are also
+    unselectable, they cannot take input focus, and are not detected by
+    QGraphicsScene's item location functions.
+
+    If an item becomes invisible while grabbing the mouse, (i.e., while it is
+    receiving mouse events,) it will automatically lose the mouse grab, and
+    the grab is not regained by making the item visible again; it must receive
+    a new mouse press to regain the mouse grab.
+
+    Similarly, an invisible item cannot have focus, so if the item has focus
+    when it becomes invisible, it will lose focus, and the focus is not
+    regained by simply making the item visible again.
+
+    If you hide a parent item, all its children will also be hidden. If you
+    show a parent item, all children will be shown, unless they have been
+    explicitly hidden (i.e., if you call setVisible(false) on a child, it will
+    not be reshown even if its parent is hidden, and then shown again).
+
+    Items are visible by default; it is unnecessary to call
+    setVisible() on a new item.
+
+    \sa isVisible(), show(), hide()
+*/
+void QGraphicsItem::setVisible(bool visible)
+{
+    d_ptr->setVisibleHelper(visible, /* explicit = */ true);
+}
+
+/*!
+    \fn void QGraphicsItem::hide()
+
+    Hides the item. (Items are visible by default.)
+
+    This convenience function is equivalent to calling \c setVisible(false).
+
+    \sa show(), setVisible()
+*/
+
+/*!
+    \fn void QGraphicsItem::show()
+
+    Shows the item. (Items are visible by default.)
+
+    This convenience function is equivalent to calling \c setVisible(true).
+
+    \sa hide(), setVisible()
+*/
+
+/*!
+    Returns true if the item is enabled; otherwise, false is returned.
+
+    \sa setEnabled()
+*/
+bool QGraphicsItem::isEnabled() const
+{
+    return d_ptr->enabled;
+}
+
+/*!
+    \internal
+
+    Sets this item's visibility to \a newEnabled. If \a explicitly is true,
+    this item will be "explicitly" \a newEnabled; otherwise, it.. will not be.
+*/
+void QGraphicsItemPrivate::setEnabledHelper(bool newEnabled, bool explicitly, bool update)
+{
+    // Update explicit bit.
+    if (explicitly)
+        explicitlyDisabled = newEnabled ? 0 : 1;
+
+    // Check if there's nothing to do.
+    if (enabled == quint32(newEnabled))
+        return;
+
+    // Certain properties are dropped when an item is disabled.
+    if (!newEnabled) {
+        if (scene && scene->mouseGrabberItem() == q_ptr)
+            q_ptr->ungrabMouse();
+        if (q_ptr->hasFocus()) {
+            // Disabling the closest non-panel ancestor of the focus item
+            // causes focus to pop to the next item, otherwise it's cleared.
+            QGraphicsItem *focusItem = scene->focusItem();
+            bool clear = true;
+            if (isWidget && !focusItem->isPanel() && q_ptr->isAncestorOf(focusItem)) {
+                do {
+                    if (focusItem == q_ptr) {
+                        clear = !static_cast<QGraphicsWidget *>(q_ptr)->focusNextPrevChild(true);
+                        break;
+                    }
+                } while ((focusItem = focusItem->parentWidget()) && !focusItem->isPanel());
+            }
+            if (clear)
+                q_ptr->clearFocus();
+        }
+        if (q_ptr->isSelected())
+            q_ptr->setSelected(false);
+    }
+
+    // Modify the property.
+    const QVariant newEnabledVariant(q_ptr->itemChange(QGraphicsItem::ItemEnabledChange,
+                                                       quint32(newEnabled)));
+    enabled = newEnabledVariant.toBool();
+
+    // Schedule redraw.
+    if (update)
+        q_ptr->update();
+
+    foreach (QGraphicsItem *child, children) {
+        if (!newEnabled || !child->d_ptr->explicitlyDisabled)
+            child->d_ptr->setEnabledHelper(newEnabled, /* explicitly = */ false);
+    }
+
+    // Deliver post-change notification.
+    q_ptr->itemChange(QGraphicsItem::ItemEnabledHasChanged, newEnabledVariant);
+
+    if (isObject)
+        emit static_cast<QGraphicsObject *>(q_ptr)->enabledChanged();
+}
+
+/*!
+    If \a enabled is true, the item is enabled; otherwise, it is disabled.
+
+    Disabled items are visible, but they do not receive any events, and cannot
+    take focus nor be selected. Mouse events are discarded; they are not
+    propagated unless the item is also invisible, or if it does not accept
+    mouse events (see acceptedMouseButtons()). A disabled item cannot become the
+    mouse grabber, and as a result of this, an item loses the grab if it
+    becomes disabled when grabbing the mouse, just like it loses focus if it
+    had focus when it was disabled.
+
+    Disabled items are traditionally drawn using grayed-out colors (see \l
+    QPalette::Disabled).
+
+    If you disable a parent item, all its children will also be disabled. If
+    you enable a parent item, all children will be enabled, unless they have
+    been explicitly disabled (i.e., if you call setEnabled(false) on a child,
+    it will not be reenabled if its parent is disabled, and then enabled
+    again).
+
+    Items are enabled by default.
+
+    \note If you install an event filter, you can still intercept events
+    before they are delivered to items; this mechanism disregards the item's
+    enabled state.
+
+    \sa isEnabled()
+*/
+void QGraphicsItem::setEnabled(bool enabled)
+{
+    d_ptr->setEnabledHelper(enabled, /* explicitly = */ true);
+}
+
+/*!
+    Returns true if this item is selected; otherwise, false is returned.
+
+    Items that are in a group inherit the group's selected state.
+
+    Items are not selected by default.
+
+    \sa setSelected(), QGraphicsScene::setSelectionArea()
+*/
+bool QGraphicsItem::isSelected() const
+{
+    if (QGraphicsItemGroup *group = this->group())
+        return group->isSelected();
+    return d_ptr->selected;
+}
+
+/*!
+    If \a selected is true and this item is selectable, this item is selected;
+    otherwise, it is unselected.
+
+    If the item is in a group, the whole group's selected state is toggled by
+    this function. If the group is selected, all items in the group are also
+    selected, and if the group is not selected, no item in the group is
+    selected.
+
+    Only visible, enabled, selectable items can be selected.  If \a selected
+    is true and this item is either invisible or disabled or unselectable,
+    this function does nothing.
+
+    By default, items cannot be selected. To enable selection, set the
+    ItemIsSelectable flag.
+
+    This function is provided for convenience, allowing individual toggling of
+    the selected state of an item. However, a more common way of selecting
+    items is to call QGraphicsScene::setSelectionArea(), which will call this
+    function for all visible, enabled, and selectable items within a specified
+    area on the scene.
+
+    \sa isSelected(), QGraphicsScene::selectedItems()
+*/
+void QGraphicsItem::setSelected(bool selected)
+{
+    if (QGraphicsItemGroup *group = this->group()) {
+        group->setSelected(selected);
+        return;
+    }
+
+    if (!(d_ptr->flags & ItemIsSelectable) || !d_ptr->enabled || !d_ptr->visible)
+        selected = false;
+    if (d_ptr->selected == selected)
+        return;
+    const QVariant newSelectedVariant(itemChange(ItemSelectedChange, quint32(selected)));
+    bool newSelected = newSelectedVariant.toBool();
+    if (d_ptr->selected == newSelected)
+        return;
+    d_ptr->selected = newSelected;
+
+    update();
+    if (d_ptr->scene) {
+        QGraphicsScenePrivate *sceneD = d_ptr->scene->d_func();
+        if (selected) {
+            sceneD->selectedItems << this;
+        } else {
+            // QGraphicsScene::selectedItems() lazily pulls out all items that are
+            // no longer selected.
+        }
+        if (!sceneD->selectionChanging)
+            emit d_ptr->scene->selectionChanged();
+    }
+
+    // Deliver post-change notification.
+    itemChange(QGraphicsItem::ItemSelectedHasChanged, newSelectedVariant);
+}
+
+/*!
+    \since 4.5
+
+    Returns this item's local opacity, which is between 0.0 (transparent) and
+    1.0 (opaque). This value is combined with parent and ancestor values into
+    the effectiveOpacity(). The effective opacity decides how the item is
+    rendered.
+
+    The opacity property decides the state of the painter passed to the
+    paint() function. If the item is cached, i.e., ItemCoordinateCache or
+    DeviceCoordinateCache, the effective property will be applied to the item's
+    cache as it is rendered.
+
+    The default opacity is 1.0; fully opaque.
+
+    \sa setOpacity(), paint(), ItemIgnoresParentOpacity,
+    ItemDoesntPropagateOpacityToChildren
+*/
+qreal QGraphicsItem::opacity() const
+{
+    return d_ptr->opacity;
+}
+
+/*!
+    \since 4.5
+
+    Returns this item's \e effective opacity, which is between 0.0
+    (transparent) and 1.0 (opaque). This value is a combination of this item's
+    local opacity, and its parent and ancestors' opacities. The effective
+    opacity decides how the item is rendered.
+
+    \sa opacity(), setOpacity(), paint(), ItemIgnoresParentOpacity,
+    ItemDoesntPropagateOpacityToChildren
+*/
+qreal QGraphicsItem::effectiveOpacity() const
+{
+    return d_ptr->effectiveOpacity();
+}
+
+/*!
+    \since 4.5
+
+    Sets this item's local \a opacity, between 0.0 (transparent) and 1.0
+    (opaque). The item's local opacity is combined with parent and ancestor
+    opacities into the effectiveOpacity().
+
+    By default, opacity propagates from parent to child, so if a parent's
+    opacity is 0.5 and the child is also 0.5, the child's effective opacity
+    will be 0.25.
+
+    The opacity property decides the state of the painter passed to the
+    paint() function. If the item is cached, i.e., ItemCoordinateCache or
+    DeviceCoordinateCache, the effective property will be applied to the
+    item's cache as it is rendered.
+
+    There are two item flags that affect how the item's opacity is combined
+    with the parent: ItemIgnoresParentOpacity and
+    ItemDoesntPropagateOpacityToChildren.
+
+    \sa opacity(), effectiveOpacity()
+*/
+void QGraphicsItem::setOpacity(qreal opacity)
+{
+    // Notify change.
+    const QVariant newOpacityVariant(itemChange(ItemOpacityChange, opacity));
+
+    // Normalized opacity
+    qreal newOpacity = qBound(qreal(0), newOpacityVariant.toReal(), qreal(1));
+
+    // No change? Done.
+    if (newOpacity == d_ptr->opacity)
+        return;
+
+    bool wasFullyTransparent = d_ptr->isOpacityNull();
+    d_ptr->opacity = newOpacity;
+
+    // Notify change.
+    itemChange(ItemOpacityHasChanged, newOpacityVariant);
+
+    // Update.
+    if (d_ptr->scene) {
+#ifndef QT_NO_GRAPHICSEFFECT
+        d_ptr->invalidateParentGraphicsEffectsRecursively();
+        if (!(d_ptr->flags & ItemDoesntPropagateOpacityToChildren))
+            d_ptr->invalidateChildGraphicsEffectsRecursively(QGraphicsItemPrivate::OpacityChanged);
+#endif //QT_NO_GRAPHICSEFFECT
+        d_ptr->scene->d_func()->markDirty(this, QRectF(),
+                                          /*invalidateChildren=*/true,
+                                          /*force=*/false,
+                                          /*ignoreOpacity=*/d_ptr->isOpacityNull());
+        if (wasFullyTransparent)
+            d_ptr->paintedViewBoundingRectsNeedRepaint = 1;
+    }
+
+    if (d_ptr->isObject)
+        emit static_cast<QGraphicsObject *>(this)->opacityChanged();
+}
+
+/*!
+    Returns a pointer to this item's effect if it has one; otherwise 0.
+
+    \since 4.6
+*/
+#ifndef QT_NO_GRAPHICSEFFECT
+QGraphicsEffect *QGraphicsItem::graphicsEffect() const
+{
+    return d_ptr->graphicsEffect;
+}
+
+/*!
+    Sets \a effect as the item's effect. If there already is an effect installed
+    on this item, QGraphicsItem will delete the existing effect before installing
+    the new \a effect.
+
+    If \a effect is the installed on a different item, setGraphicsEffect() will remove
+    the effect from the item and install it on this item.
+
+    QGraphicsItem takes ownership of \a effect.
+
+    \note This function will apply the effect on itself and all its children.
+
+    \since 4.6
+*/
+void QGraphicsItem::setGraphicsEffect(QGraphicsEffect *effect)
+{
+    if (d_ptr->graphicsEffect == effect)
+        return;
+
+    if (d_ptr->graphicsEffect) {
+        delete d_ptr->graphicsEffect;
+        d_ptr->graphicsEffect = 0;
+    } else if (d_ptr->parent) {
+        d_ptr->parent->d_ptr->updateChildWithGraphicsEffectFlagRecursively();
+    }
+
+    if (effect) {
+        // Set new effect.
+        QGraphicsEffectSourcePrivate *sourced = new QGraphicsItemEffectSourcePrivate(this);
+        QGraphicsEffectSource *source = new QGraphicsEffectSource(*sourced);
+        d_ptr->graphicsEffect = effect;
+        effect->d_func()->setGraphicsEffectSource(source);
+        prepareGeometryChange();
+    }
+}
+#endif //QT_NO_GRAPHICSEFFECT
+
+void QGraphicsItemPrivate::updateChildWithGraphicsEffectFlagRecursively()
+{
+#ifndef QT_NO_GRAPHICSEFFECT
+    QGraphicsItemPrivate *itemPrivate = this;
+    do {
+        // parent chain already notified?
+        if (itemPrivate->mayHaveChildWithGraphicsEffect)
+            return;
+        itemPrivate->mayHaveChildWithGraphicsEffect = 1;
+    } while ((itemPrivate = itemPrivate->parent ? itemPrivate->parent->d_ptr.data() : 0));
+#endif
+}
+
+/*!
+    \internal
+    \since 4.6
+    Returns the effective bounding rect of the given item space rect.
+    If the item has no effect, the rect is returned unmodified.
+    If the item has an effect, the effective rect can be extend beyond the
+    item's bounding rect, depending on the effect.
+
+    \sa boundingRect()
+*/
+QRectF QGraphicsItemPrivate::effectiveBoundingRect(const QRectF &rect) const
+{
+#ifndef QT_NO_GRAPHICSEFFECT
+    Q_Q(const QGraphicsItem);
+    QGraphicsEffect *effect = graphicsEffect;
+    if (scene && effect && effect->isEnabled()) {
+        if (scene->d_func()->views.isEmpty())
+            return effect->boundingRectFor(rect);
+        QRectF sceneRect = q->mapRectToScene(rect);
+        QRectF sceneEffectRect;
+        foreach (QGraphicsView *view, scene->views()) {
+            QRectF deviceRect = view->d_func()->mapRectFromScene(sceneRect);
+            QRect deviceEffectRect = effect->boundingRectFor(deviceRect).toAlignedRect();
+            sceneEffectRect |= view->d_func()->mapRectToScene(deviceEffectRect);
+        }
+        return q->mapRectFromScene(sceneEffectRect);
+    }
+#endif //QT_NO_GRAPHICSEFFECT
+    return rect;
+}
+
+/*!
+    \internal
+    \since 4.6
+    Returns the effective bounding rect of the item.
+    If the item has no effect, this is the same as the item's bounding rect.
+    If the item has an effect, the effective rect can be larger than the item's
+    bouding rect, depending on the effect.
+
+    \sa boundingRect()
+*/
+QRectF QGraphicsItemPrivate::effectiveBoundingRect(QGraphicsItem *topMostEffectItem) const
+{
+#ifndef QT_NO_GRAPHICSEFFECT
+    Q_Q(const QGraphicsItem);
+    QRectF brect = effectiveBoundingRect(q_ptr->boundingRect());
+    if (ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren || topMostEffectItem == q)
+        return brect;
+
+    const QGraphicsItem *effectParent = parent;
+    while (effectParent) {
+        QGraphicsEffect *effect = effectParent->d_ptr->graphicsEffect;
+        if (scene && effect && effect->isEnabled()) {
+            const QRectF brectInParentSpace = q->mapRectToItem(effectParent, brect);
+            const QRectF effectRectInParentSpace = effectParent->d_ptr->effectiveBoundingRect(brectInParentSpace);
+            brect = effectParent->mapRectToItem(q, effectRectInParentSpace);
+        }
+        if (effectParent->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren
+            || topMostEffectItem == effectParent) {
+            return brect;
+        }
+        effectParent = effectParent->d_ptr->parent;
+    }
+
+    return brect;
+#else //QT_NO_GRAPHICSEFFECT
+    return q_ptr->boundingRect();
+#endif //QT_NO_GRAPHICSEFFECT
+
+}
+
+/*!
+    \internal
+    \since 4.6
+    Returns the effective bounding rect of this item in scene coordinates,
+    by combining sceneTransform() with boundingRect(), taking into account
+    the effect that the item might have.
+
+    If the item has no effect, this is the same as sceneBoundingRect().
+
+    \sa effectiveBoundingRect(), sceneBoundingRect()
+*/
+QRectF QGraphicsItemPrivate::sceneEffectiveBoundingRect() const
+{
+    // Find translate-only offset
+    // COMBINE
+    QPointF offset;
+    const QGraphicsItem *parentItem = q_ptr;
+    const QGraphicsItemPrivate *itemd;
+    do {
+        itemd = parentItem->d_ptr.data();
+        if (itemd->transformData)
+            break;
+        offset += itemd->pos;
+    } while ((parentItem = itemd->parent));
+
+    QRectF br = effectiveBoundingRect();
+    br.translate(offset);
+    return !parentItem ? br : parentItem->sceneTransform().mapRect(br);
+}
+
+/*!
+   Returns true if this item can accept drag and drop events; otherwise,
+   returns false. By default, items do not accept drag and drop events; items
+   are transparent to drag and drop.
+
+   \sa setAcceptDrops()
+*/
+bool QGraphicsItem::acceptDrops() const
+{
+    return d_ptr->acceptDrops;
+}
+
+/*!
+    If \a on is true, this item will accept drag and drop events; otherwise,
+    it is transparent for drag and drop events. By default, items do not
+    accept drag and drop events.
+
+    \sa acceptDrops()
+*/
+void QGraphicsItem::setAcceptDrops(bool on)
+{
+    d_ptr->acceptDrops = on;
+}
+
+/*!
+    Returns the mouse buttons that this item accepts mouse events for.  By
+    default, all mouse buttons are accepted.
+
+    If an item accepts a mouse button, it will become the mouse
+    grabber item when a mouse press event is delivered for that mouse
+    button. However, if the item does not accept the button,
+    QGraphicsScene will forward the mouse events to the first item
+    beneath it that does.
+
+    \sa setAcceptedMouseButtons(), mousePressEvent()
+*/
+Qt::MouseButtons QGraphicsItem::acceptedMouseButtons() const
+{
+    return Qt::MouseButtons(d_ptr->acceptedMouseButtons);
+}
+
+/*!
+    Sets the mouse \a buttons that this item accepts mouse events for.
+
+    By default, all mouse buttons are accepted. If an item accepts a
+    mouse button, it will become the mouse grabber item when a mouse
+    press event is delivered for that button. However, if the item
+    does not accept the mouse button, QGraphicsScene will forward the
+    mouse events to the first item beneath it that does.
+
+    To disable mouse events for an item (i.e., make it transparent for mouse
+    events), call setAcceptedMouseButtons(0).
+
+    \sa acceptedMouseButtons(), mousePressEvent()
+*/
+void QGraphicsItem::setAcceptedMouseButtons(Qt::MouseButtons buttons)
+{
+    if (Qt::MouseButtons(d_ptr->acceptedMouseButtons) != buttons) {
+        if (buttons == 0 && d_ptr->scene && d_ptr->scene->mouseGrabberItem() == this
+            && d_ptr->scene->d_func()->lastMouseGrabberItemHasImplicitMouseGrab) {
+            ungrabMouse();
+        }
+        d_ptr->acceptedMouseButtons = quint32(buttons);
+    }
+}
+
+/*!
+    \since 4.4
+
+    Returns true if an item accepts hover events
+    (QGraphicsSceneHoverEvent); otherwise, returns false. By default,
+    items do not accept hover events.
+
+    \sa setAcceptedMouseButtons()
+*/
+bool QGraphicsItem::acceptHoverEvents() const
+{
+    return d_ptr->acceptsHover;
+}
+
+/*!
+    \obsolete
+
+    Call acceptHoverEvents() instead.
+*/
+bool QGraphicsItem::acceptsHoverEvents() const
+{
+    return d_ptr->acceptsHover;
+}
+
+/*!
+    \since 4.4
+
+    If \a enabled is true, this item will accept hover events;
+    otherwise, it will ignore them. By default, items do not accept
+    hover events.
+
+    Hover events are delivered when there is no current mouse grabber
+    item.  They are sent when the mouse cursor enters an item, when it
+    moves around inside the item, and when the cursor leaves an
+    item. Hover events are commonly used to highlight an item when
+    it's entered, and for tracking the mouse cursor as it hovers over
+    the item (equivalent to QWidget::mouseTracking).
+
+    Parent items receive hover enter events before their children, and
+    leave events after their children. The parent does not receive a
+    hover leave event if the cursor enters a child, though; the parent
+    stays "hovered" until the cursor leaves its area, including its
+    children's areas.
+
+    If a parent item handles child events, it will receive hover move,
+    drag move, and drop events as the cursor passes through its
+    children, but it does not receive hover enter and hover leave, nor
+    drag enter and drag leave events on behalf of its children.
+
+    A QGraphicsWidget with window decorations will accept hover events
+    regardless of the value of acceptHoverEvents().
+
+    \sa acceptHoverEvents(), hoverEnterEvent(), hoverMoveEvent(),
+    hoverLeaveEvent()
+*/
+void QGraphicsItem::setAcceptHoverEvents(bool enabled)
+{
+    if (d_ptr->acceptsHover == quint32(enabled))
+        return;
+    d_ptr->acceptsHover = quint32(enabled);
+    if (d_ptr->acceptsHover && d_ptr->scene && d_ptr->scene->d_func()->allItemsIgnoreHoverEvents) {
+        d_ptr->scene->d_func()->allItemsIgnoreHoverEvents = false;
+        d_ptr->scene->d_func()->enableMouseTrackingOnViews();
+    }
+}
+
+/*!
+    \obsolete
+
+    Use setAcceptHoverEvents(\a enabled) instead.
+*/
+void QGraphicsItem::setAcceptsHoverEvents(bool enabled)
+{
+    setAcceptHoverEvents(enabled);
+}
+
+/*! \since 4.6
+
+    Returns true if an item accepts \l{QTouchEvent}{touch events};
+    otherwise, returns false. By default, items do not accept touch events.
+
+    \sa setAcceptTouchEvents()
+*/
+bool QGraphicsItem::acceptTouchEvents() const
+{
+    return d_ptr->acceptTouchEvents;
+}
+
+/*!
+    \since 4.6
+
+    If \a enabled is true, this item will accept \l{QTouchEvent}{touch events};
+    otherwise, it will ignore them. By default, items do not accept
+    touch events.
+*/
+void QGraphicsItem::setAcceptTouchEvents(bool enabled)
+{
+    if (d_ptr->acceptTouchEvents == quint32(enabled))
+        return;
+    d_ptr->acceptTouchEvents = quint32(enabled);
+    if (d_ptr->acceptTouchEvents && d_ptr->scene && d_ptr->scene->d_func()->allItemsIgnoreTouchEvents) {
+        d_ptr->scene->d_func()->allItemsIgnoreTouchEvents = false;
+        d_ptr->scene->d_func()->enableTouchEventsOnViews();
+    }
+}
+
+/*!
+    \since 4.6
+
+    Returns true if this item filters child events (i.e., all events
+    intended for any of its children are instead sent to this item);
+    otherwise, false is returned.
+
+    The default value is false; child events are not filtered.
+
+    \sa setFiltersChildEvents()
+*/
+bool QGraphicsItem::filtersChildEvents() const
+{
+    return d_ptr->filtersDescendantEvents;
+}
+
+/*!
+    \since 4.6
+
+    If \a enabled is true, this item is set to filter all events for
+    all its children (i.e., all events intented for any of its
+    children are instead sent to this item); otherwise, if \a enabled
+    is false, this item will only handle its own events. The default
+    value is false.
+
+    \sa filtersChildEvents()
+*/
+void QGraphicsItem::setFiltersChildEvents(bool enabled)
+{
+    if (d_ptr->filtersDescendantEvents == enabled)
+        return;
+
+    d_ptr->filtersDescendantEvents = enabled;
+    d_ptr->updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-2));
+}
+
+/*!
+    \obsolete
+
+    Returns true if this item handles child events (i.e., all events
+    intended for any of its children are instead sent to this item);
+    otherwise, false is returned.
+
+    This property is useful for item groups; it allows one item to
+    handle events on behalf of its children, as opposed to its
+    children handling their events individually.
+
+    The default is to return false; children handle their own events.
+    The exception for this is if the item is a QGraphicsItemGroup, then
+    it defaults to return true.
+
+    \sa setHandlesChildEvents()
+*/
+bool QGraphicsItem::handlesChildEvents() const
+{
+    return d_ptr->handlesChildEvents;
+}
+
+/*!
+    \obsolete
+
+    If \a enabled is true, this item is set to handle all events for
+    all its children (i.e., all events intented for any of its
+    children are instead sent to this item); otherwise, if \a enabled
+    is false, this item will only handle its own events. The default
+    value is false.
+
+    This property is useful for item groups; it allows one item to
+    handle events on behalf of its children, as opposed to its
+    children handling their events individually.
+
+    If a child item accepts hover events, its parent will receive
+    hover move events as the cursor passes through the child, but it
+    does not receive hover enter and hover leave events on behalf of
+    its child.
+
+    \sa handlesChildEvents()
+*/
+void QGraphicsItem::setHandlesChildEvents(bool enabled)
+{
+    if (d_ptr->handlesChildEvents == enabled)
+        return;
+
+    d_ptr->handlesChildEvents = enabled;
+    d_ptr->updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-1));
+}
+/*!
+    \since 4.6
+    Returns true if this item is active; otherwise returns false.
+
+    An item can only be active if the scene is active. An item is active
+    if it is, or is a descendent of, an active panel. Items in non-active
+    panels are not active.
+
+    Items that are not part of a panel follow scene activation when the
+    scene has no active panel.
+
+    Only active items can gain input focus.
+
+    \sa QGraphicsScene::isActive(), QGraphicsScene::activePanel(), panel(), isPanel()
+*/
+bool QGraphicsItem::isActive() const
+{
+    if (!d_ptr->scene || !d_ptr->scene->isActive())
+        return false;
+    return panel() == d_ptr->scene->activePanel();
+}
+
+/*!
+    \since 4.6
+
+    If \a active is true, and the scene is active, this item's panel will be
+    activated. Otherwise, the panel is deactivated.
+
+    If the item is not part of an active scene, \a active will decide what
+    happens to the panel when the scene becomes active or the item is added to
+    the scene. If true, the item's panel will be activated when the item is
+    either added to the scene or the scene is activated. Otherwise, the item
+    will stay inactive independent of the scene's activated state.
+
+    \sa isPanel(), QGraphicsScene::setActivePanel(), QGraphicsScene::isActive()
+*/
+void QGraphicsItem::setActive(bool active)
+{
+    d_ptr->explicitActivate = 1;
+    d_ptr->wantsActive = active;
+    if (d_ptr->scene) {
+        if (active) {
+            // Activate this item.
+            d_ptr->scene->setActivePanel(this);
+        } else {
+            // Deactivate this item, and reactivate the last active item
+            // (if any).
+            QGraphicsItem *lastActive = d_ptr->scene->d_func()->lastActivePanel;
+            d_ptr->scene->setActivePanel(lastActive != this ? lastActive : 0);
+        }
+    }
+}
+
+/*!
+    Returns true if this item is active, and it or its \l{focusProxy()}{focus
+    proxy} has keyboard input focus; otherwise, returns false.
+
+    \sa focusItem(), setFocus(), QGraphicsScene::setFocusItem(), isActive()
+*/
+bool QGraphicsItem::hasFocus() const
+{
+    if (!d_ptr->scene || !d_ptr->scene->isActive())
+        return false;
+
+    if (d_ptr->focusProxy)
+        return d_ptr->focusProxy->hasFocus();
+
+    if (d_ptr->scene->d_func()->focusItem != this)
+        return false;
+
+    return panel() == d_ptr->scene->d_func()->activePanel;
+}
+
+/*!
+    Gives keyboard input focus to this item. The \a focusReason argument will
+    be passed into any \l{QFocusEvent}{focus event} generated by this function;
+    it is used to give an explanation of what caused the item to get focus.
+
+    Only enabled items that set the ItemIsFocusable flag can accept keyboard
+    focus.
+
+    If this item is not visible, not active, or not associated with a scene,
+    it will not gain immediate input focus. However, it will be registered as
+    the preferred focus item for its subtree of items, should it later become
+    visible.
+
+    As a result of calling this function, this item will receive a
+    \l{focusInEvent()}{focus in event} with \a focusReason. If another item
+    already has focus, that item will first receive a \l{focusOutEvent()}
+    {focus out event} indicating that it has lost input focus.
+
+    \sa clearFocus(), hasFocus(), focusItem(), focusProxy()
+*/
+void QGraphicsItem::setFocus(Qt::FocusReason focusReason)
+{
+    d_ptr->setFocusHelper(focusReason, /* climb = */ true, /* focusFromHide = */ false);
+}
+
+/*!
+    \internal
+*/
+void QGraphicsItemPrivate::setFocusHelper(Qt::FocusReason focusReason, bool climb, bool focusFromHide)
+{
+    // Disabled / unfocusable items cannot accept focus.
+    if (!q_ptr->isEnabled() || !(flags & QGraphicsItem::ItemIsFocusable))
+        return;
+
+    // Find focus proxy.
+    QGraphicsItem *f = q_ptr;
+    while (f->d_ptr->focusProxy)
+        f = f->d_ptr->focusProxy;
+
+    // Return if it already has focus.
+    if (scene && scene->focusItem() == f)
+        return;
+
+    // Update focus scope item ptr.
+    QGraphicsItem *p = parent;
+    while (p) {
+        if (p->flags() & QGraphicsItem::ItemIsFocusScope) {
+            QGraphicsItem *oldFocusScopeItem = p->d_ptr->focusScopeItem;
+            p->d_ptr->focusScopeItem = q_ptr;
+            if (!p->focusItem() && !focusFromHide) {
+                if (oldFocusScopeItem)
+                    oldFocusScopeItem->d_ptr->focusScopeItemChange(false);
+                focusScopeItemChange(true);
+                // If you call setFocus on a child of a focus scope that
+                // doesn't currently have a focus item, then stop.
+                return;
+            }
+            break;
+        }
+        p = p->d_ptr->parent;
+    }
+
+    if (climb) {
+        while (f->d_ptr->focusScopeItem && f->d_ptr->focusScopeItem->isVisible())
+            f = f->d_ptr->focusScopeItem;
+    }
+
+    // Update the child focus chain.
+    QGraphicsItem *commonAncestor = 0;
+    if (scene && scene->focusItem()) {
+        commonAncestor = scene->focusItem()->commonAncestorItem(f);
+        scene->focusItem()->d_ptr->clearSubFocus(scene->focusItem(), commonAncestor);
+    }
+
+    f->d_ptr->setSubFocus(f, commonAncestor);
+
+    // Update the scene's focus item.
+    if (scene) {
+        QGraphicsItem *p = q_ptr->panel();
+        if ((!p && scene->isActive()) || (p && p->isActive())) {
+            // Visible items immediately gain focus from scene.
+            scene->d_func()->setFocusItemHelper(f, focusReason);
+        }
+    }
+}
+
+/*!
+    Takes keyboard input focus from the item.
+
+    If it has focus, a \l{focusOutEvent()}{focus out event} is sent to this
+    item to tell it that it is about to lose the focus.
+
+    Only items that set the ItemIsFocusable flag, or widgets that set an
+    appropriate focus policy, can accept keyboard focus.
+
+    \sa setFocus(), hasFocus(), QGraphicsWidget::focusPolicy
+*/
+void QGraphicsItem::clearFocus()
+{
+    d_ptr->clearFocusHelper(/* giveFocusToParent = */ true);
+}
+
+/*!
+    \internal
+*/
+void QGraphicsItemPrivate::clearFocusHelper(bool giveFocusToParent)
+{
+    if (giveFocusToParent) {
+        // Pass focus to the closest parent focus scope
+        if (!inDestructor) {
+            QGraphicsItem *p = parent;
+            while (p) {
+                if (p->flags() & QGraphicsItem::ItemIsFocusScope) {
+                    if (p->d_ptr->focusScopeItem == q_ptr) {
+                        p->d_ptr->focusScopeItem = 0;
+                        if (!q_ptr->hasFocus()) //if it has focus, focusScopeItemChange is called elsewhere
+                            focusScopeItemChange(false);
+                    }
+                    if (q_ptr->hasFocus())
+                        p->d_ptr->setFocusHelper(Qt::OtherFocusReason, /* climb = */ false,
+                                                 /* focusFromHide = */ false);
+                    return;
+                }
+                p = p->d_ptr->parent;
+            }
+        }
+    }
+
+    if (q_ptr->hasFocus()) {
+        // Invisible items with focus must explicitly clear subfocus.
+        clearSubFocus(q_ptr);
+
+        // If this item has the scene's input focus, clear it.
+        scene->setFocusItem(0);
+    }
+}
+
+/*!
+    \since 4.6
+
+    Returns this item's focus proxy, or 0 if this item has no
+    focus proxy.
+
+    \sa setFocusProxy(), setFocus(), hasFocus()
+*/
+QGraphicsItem *QGraphicsItem::focusProxy() const
+{
+    return d_ptr->focusProxy;
+}
+
+/*!
+    \since 4.6
+
+    Sets the item's focus proxy to \a item.
+
+    If an item has a focus proxy, the focus proxy will receive
+    input focus when the item gains input focus. The item itself
+    will still have focus (i.e., hasFocus() will return true),
+    but only the focus proxy will receive the keyboard input.
+
+    A focus proxy can itself have a focus proxy, and so on. In
+    such case, keyboard input will be handled by the outermost
+    focus proxy.
+
+    The focus proxy \a item must belong to the same scene as
+    this item.
+
+    \sa focusProxy(), setFocus(), hasFocus()
+*/
+void QGraphicsItem::setFocusProxy(QGraphicsItem *item)
+{
+    if (item == d_ptr->focusProxy)
+        return;
+    if (item == this) {
+        qWarning("QGraphicsItem::setFocusProxy: cannot assign self as focus proxy");
+        return;
+    }
+    if (item) {
+        if (item->d_ptr->scene != d_ptr->scene) {
+            qWarning("QGraphicsItem::setFocusProxy: focus proxy must be in same scene");
+            return;
+        }
+        for (QGraphicsItem *f = item->focusProxy(); f != 0; f = f->focusProxy()) {
+            if (f == this) {
+                qWarning("QGraphicsItem::setFocusProxy: %p is already in the focus proxy chain", item);
+                return;
+            }
+        }
+    }
+
+    QGraphicsItem *lastFocusProxy = d_ptr->focusProxy;
+    if (lastFocusProxy)
+        lastFocusProxy->d_ptr->focusProxyRefs.removeOne(&d_ptr->focusProxy);
+    d_ptr->focusProxy = item;
+    if (item)
+        item->d_ptr->focusProxyRefs << &d_ptr->focusProxy;
+}
+
+/*!
+    \since 4.6
+
+    If this item, a child or descendant of this item currently has input
+    focus, this function will return a pointer to that item. If
+    no descendant has input focus, 0 is returned.
+
+    \sa hasFocus(), setFocus(), QWidget::focusWidget()
+*/
+QGraphicsItem *QGraphicsItem::focusItem() const
+{
+    return d_ptr->subFocusItem;
+}
+
+/*!
+    \internal
+
+    Returns this item's focus scope item.
+*/
+QGraphicsItem *QGraphicsItem::focusScopeItem() const
+{
+    return d_ptr->focusScopeItem;
+}
+
+/*!
+    \since 4.4
+    Grabs the mouse input.
+
+    This item will receive all mouse events for the scene until any of the
+    following events occurs:
+
+    \list
+    \o The item becomes invisible
+    \o The item is removed from the scene
+    \o The item is deleted
+    \o The item call ungrabMouse()
+    \o Another item calls grabMouse(); the item will regain the mouse grab
+    when the other item calls ungrabMouse().
+    \endlist
+
+    When an item gains the mouse grab, it receives a QEvent::GrabMouse
+    event. When it loses the mouse grab, it receives a QEvent::UngrabMouse
+    event. These events can be used to detect when your item gains or loses
+    the mouse grab through other means than receiving mouse button events.
+
+    It is almost never necessary to explicitly grab the mouse in Qt, as Qt
+    grabs and releases it sensibly. In particular, Qt grabs the mouse when you
+    press a mouse button, and keeps the mouse grabbed until you release the
+    last mouse button. Also, Qt::Popup widgets implicitly call grabMouse()
+    when shown, and ungrabMouse() when hidden.
+
+    Note that only visible items can grab mouse input. Calling grabMouse() on
+    an invisible item has no effect.
+
+    Keyboard events are not affected.
+
+    \sa QGraphicsScene::mouseGrabberItem(), ungrabMouse(), grabKeyboard()
+*/
+void QGraphicsItem::grabMouse()
+{
+    if (!d_ptr->scene) {
+        qWarning("QGraphicsItem::grabMouse: cannot grab mouse without scene");
+        return;
+    }
+    if (!d_ptr->visible) {
+        qWarning("QGraphicsItem::grabMouse: cannot grab mouse while invisible");
+        return;
+    }
+    d_ptr->scene->d_func()->grabMouse(this);
+}
+
+/*!
+    \since 4.4
+    Releases the mouse grab.
+
+    \sa grabMouse(), ungrabKeyboard()
+*/
+void QGraphicsItem::ungrabMouse()
+{
+    if (!d_ptr->scene) {
+        qWarning("QGraphicsItem::ungrabMouse: cannot ungrab mouse without scene");
+        return;
+    }
+    d_ptr->scene->d_func()->ungrabMouse(this);
+}
+
+/*!
+    \since 4.4
+    Grabs the keyboard input.
+
+    The item will receive all keyboard input to the scene until one of the
+    following events occur:
+
+    \list
+    \o The item becomes invisible
+    \o The item is removed from the scene
+    \o The item is deleted
+    \o The item calls ungrabKeyboard()
+    \o Another item calls grabKeyboard(); the item will regain the keyboard grab
+    when the other item calls ungrabKeyboard().
+    \endlist
+
+    When an item gains the keyboard grab, it receives a QEvent::GrabKeyboard
+    event. When it loses the keyboard grab, it receives a
+    QEvent::UngrabKeyboard event. These events can be used to detect when your
+    item gains or loses the keyboard grab through other means than gaining
+    input focus.
+
+    It is almost never necessary to explicitly grab the keyboard in Qt, as Qt
+    grabs and releases it sensibly. In particular, Qt grabs the keyboard when
+    your item gains input focus, and releases it when your item loses input
+    focus, or when the item is hidden.
+
+    Note that only visible items can grab keyboard input. Calling
+    grabKeyboard() on an invisible item has no effect.
+
+    Keyboard events are not affected.
+
+    \sa ungrabKeyboard(), grabMouse(), setFocus()
+*/
+void QGraphicsItem::grabKeyboard()
+{
+    if (!d_ptr->scene) {
+        qWarning("QGraphicsItem::grabKeyboard: cannot grab keyboard without scene");
+        return;
+    }
+    if (!d_ptr->visible) {
+        qWarning("QGraphicsItem::grabKeyboard: cannot grab keyboard while invisible");
+        return;
+    }
+    d_ptr->scene->d_func()->grabKeyboard(this);
+}
+
+/*!
+    \since 4.4
+    Releases the keyboard grab.
+
+    \sa grabKeyboard(), ungrabMouse()
+*/
+void QGraphicsItem::ungrabKeyboard()
+{
+    if (!d_ptr->scene) {
+        qWarning("QGraphicsItem::ungrabKeyboard: cannot ungrab keyboard without scene");
+        return;
+    }
+    d_ptr->scene->d_func()->ungrabKeyboard(this);
+}
+
+/*!
+    Returns the position of the item in parent coordinates. If the item has no
+    parent, its position is given in scene coordinates.
+
+    The position of the item describes its origin (local coordinate
+    (0, 0)) in parent coordinates; this function returns the same as
+    mapToParent(0, 0).
+
+    For convenience, you can also call scenePos() to determine the
+    item's position in scene coordinates, regardless of its parent.
+
+    \sa x(), y(), setPos(), transform(), {The Graphics View Coordinate System}
+*/
+QPointF QGraphicsItem::pos() const
+{
+    return d_ptr->pos;
+}
+
+/*!
+    \fn QGraphicsItem::x() const
+
+    This convenience function is equivalent to calling pos().x().
+
+    \sa y()
+*/
+
+/*!
+    \since 4.6
+
+    Set's the \a x coordinate of the item's position. Equivalent to
+    calling setPos(x, y()).
+
+    \sa x(), setPos()
+*/
+void QGraphicsItem::setX(qreal x)
+{
+    if (d_ptr->inDestructor)
+        return;
+
+    if (qIsNaN(x))
+        return;
+
+    setPos(QPointF(x, d_ptr->pos.y()));
+}
+
+/*!
+    \fn QGraphicsItem::y() const
+
+    This convenience function is equivalent to calling pos().y().
+
+    \sa x()
+*/
+
+/*!
+    \since 4.6
+
+    Set's the \a y coordinate of the item's position. Equivalent to
+    calling setPos(x(), y).
+
+    \sa x(), setPos()
+*/
+void QGraphicsItem::setY(qreal y)
+{
+    if (d_ptr->inDestructor)
+        return;
+
+    if (qIsNaN(y))
+        return;
+
+    setPos(QPointF(d_ptr->pos.x(), y));
+}
+
+/*!
+    Returns the item's position in scene coordinates. This is
+    equivalent to calling \c mapToScene(0, 0).
+
+    \sa pos(), sceneTransform(), {The Graphics View Coordinate System}
+*/
+QPointF QGraphicsItem::scenePos() const
+{
+    return mapToScene(0, 0);
+}
+
+/*!
+    \internal
+
+    Sets the position \a pos.
+*/
+void QGraphicsItemPrivate::setPosHelper(const QPointF &pos)
+{
+    Q_Q(QGraphicsItem);
+    inSetPosHelper = 1;
+    if (scene)
+        q->prepareGeometryChange();
+    QPointF oldPos = this->pos;
+    this->pos = pos;
+    dirtySceneTransform = 1;
+    inSetPosHelper = 0;
+    if (isObject) {
+        if (pos.x() != oldPos.x())
+            emit static_cast<QGraphicsObject *>(q_ptr)->xChanged();
+        if (pos.y() != oldPos.y())
+            emit static_cast<QGraphicsObject *>(q_ptr)->yChanged();
+    }
+}
+
+/*!
+    \internal
+
+    Sets the transform \a transform.
+*/
+void QGraphicsItemPrivate::setTransformHelper(const QTransform &transform)
+{
+    q_ptr->prepareGeometryChange();
+    transformData->transform = transform;
+    dirtySceneTransform = 1;
+    transformChanged();
+}
+
+/*!
+    Sets the position of the item to \a pos, which is in parent
+    coordinates.  For items with no parent, \a pos is in scene
+    coordinates.
+
+    The position of the item describes its origin (local coordinate
+    (0, 0)) in parent coordinates.
+
+    \sa pos(), scenePos(), {The Graphics View Coordinate System}
+*/
+void QGraphicsItem::setPos(const QPointF &pos)
+{
+    if (d_ptr->pos == pos)
+        return;
+
+    if (d_ptr->inDestructor)
+        return;
+
+    // Update and repositition.
+    if (!(d_ptr->flags & (ItemSendsGeometryChanges | ItemSendsScenePositionChanges))) {
+        d_ptr->setPosHelper(pos);
+        if (d_ptr->isWidget)
+            static_cast<QGraphicsWidget *>(this)->d_func()->setGeometryFromSetPos();
+        if (d_ptr->scenePosDescendants)
+            d_ptr->sendScenePosChange();
+        return;
+    }
+
+    // Notify the item that the position is changing.
+    const QVariant newPosVariant(itemChange(ItemPositionChange, QVariant::fromValue<QPointF>(pos)));
+    QPointF newPos = newPosVariant.toPointF();
+    if (newPos == d_ptr->pos)
+        return;
+
+    // Update and repositition.
+    d_ptr->setPosHelper(newPos);
+
+    // Send post-notification.
+    itemChange(QGraphicsItem::ItemPositionHasChanged, newPosVariant);
+    d_ptr->sendScenePosChange();
+}
+
+/*!
+    \fn void QGraphicsItem::setPos(qreal x, qreal y)
+    \overload
+
+    This convenience function is equivalent to calling setPos(QPointF(\a x, \a
+    y)).
+*/
+
+/*!
+    \fn void QGraphicsItem::moveBy(qreal dx, qreal dy)
+
+    Moves the item by \a dx points horizontally, and \a dy point
+    vertically. This function is equivalent to calling setPos(pos() +
+    QPointF(\a dx, \a dy)).
+*/
+
+/*!
+    If this item is part of a scene that is viewed by a QGraphicsView, this
+    convenience function will attempt to scroll the view to ensure that \a
+    rect is visible inside the view's viewport. If \a rect is a null rect (the
+    default), QGraphicsItem will default to the item's bounding rect. \a xmargin
+    and \a ymargin are the number of pixels the view should use for margins.
+
+    If the specified rect cannot be reached, the contents are scrolled to the
+    nearest valid position.
+
+    If this item is not viewed by a QGraphicsView, this function does nothing.
+
+    \sa QGraphicsView::ensureVisible()
+*/
+void QGraphicsItem::ensureVisible(const QRectF &rect, int xmargin, int ymargin)
+{
+    if (d_ptr->scene) {
+        QRectF sceneRect;
+        if (!rect.isNull())
+            sceneRect = sceneTransform().mapRect(rect);
+        else
+            sceneRect = sceneBoundingRect();
+        foreach (QGraphicsView *view, d_ptr->scene->d_func()->views)
+            view->ensureVisible(sceneRect, xmargin, ymargin);
+    }
+}
+
+/*!
+    \fn void QGraphicsItem::ensureVisible(qreal x, qreal y, qreal w, qreal h,
+    int xmargin = 50, int ymargin = 50)
+
+    This convenience function is equivalent to calling
+    ensureVisible(QRectF(\a x, \a y, \a w, \a h), \a xmargin, \a ymargin):
+*/
+
+/*!
+    \obsolete
+
+    Returns the item's affine transformation matrix. This is a subset or the
+    item's full transformation matrix, and might not represent the item's full
+    transformation.
+
+    Use transform() instead.
+
+    \sa setTransform(), sceneTransform()
+*/
+QMatrix QGraphicsItem::matrix() const
+{
+    return transform().toAffine();
+}
+
+/*!
+    \since 4.3
+
+    Returns this item's transformation matrix.
+
+    The transformation matrix is combined with the item's rotation(), scale()
+    and transformations() into a combined transformations for the item.
+
+    The default transformation matrix is an identity matrix.
+
+    \sa setTransform(), sceneTransform()
+*/
+QTransform QGraphicsItem::transform() const
+{
+    if (!d_ptr->transformData)
+        return QTransform();
+    return d_ptr->transformData->transform;
+}
+
+/*!
+    \since 4.6
+
+    Returns the clockwise rotation, in degrees, around the Z axis. The default
+    value is 0 (i.e., the item is not rotated).
+
+    The rotation is combined with the item's scale(), transform() and
+    transformations() to map the item's coordinate system to the parent item.
+
+    \sa setRotation(), transformOriginPoint(), {Transformations}
+*/
+qreal QGraphicsItem::rotation() const
+{
+    if (!d_ptr->transformData)
+        return 0;
+    return d_ptr->transformData->rotation;
+}
+
+/*!
+    \since 4.6
+
+    Sets the clockwise rotation \a angle, in degrees, around the Z axis. The
+    default value is 0 (i.e., the item is not rotated). Assigning a negative
+    value will rotate the item counter-clockwise. Normally the rotation angle
+    is in the range (-360, 360), but it's also possible to assign values
+    outside of this range (e.g., a rotation of 370 degrees is the same as a
+    rotation of 10 degrees).
+
+    The item is rotated around its transform origin point, which by default
+    is (0, 0). You can select a different transformation origin by calling
+    setTransformOriginPoint().
+
+    The rotation is combined with the item's scale(), transform() and
+    transformations() to map the item's coordinate system to the parent item.
+
+    \sa rotation(), setTransformOriginPoint(), {Transformations}
+*/
+void QGraphicsItem::setRotation(qreal angle)
+{
+    prepareGeometryChange();
+    qreal newRotation = angle;
+
+    if (d_ptr->flags & ItemSendsGeometryChanges) {
+        // Notify the item that the rotation is changing.
+        const QVariant newRotationVariant(itemChange(ItemRotationChange, angle));
+        newRotation = newRotationVariant.toReal();
+    }
+
+    if (!d_ptr->transformData)
+        d_ptr->transformData = new QGraphicsItemPrivate::TransformData;
+
+    if (d_ptr->transformData->rotation == newRotation)
+        return;
+
+    d_ptr->transformData->rotation = newRotation;
+    d_ptr->transformData->onlyTransform = false;
+    d_ptr->dirtySceneTransform = 1;
+
+    // Send post-notification.
+    if (d_ptr->flags & ItemSendsGeometryChanges)
+        itemChange(ItemRotationHasChanged, newRotation);
+
+    if (d_ptr->isObject)
+        emit static_cast<QGraphicsObject *>(this)->rotationChanged();
+
+    d_ptr->transformChanged();
+}
+
+/*!
+    \since 4.6
+
+    Returns the scale factor of the item. The default scale factor is 1.0
+    (i.e., the item is not scaled).
+
+    The scale is combined with the item's rotation(), transform() and
+    transformations() to map the item's coordinate system to the parent item.
+
+    \sa setScale(), rotation(), {Transformations}
+*/
+qreal QGraphicsItem::scale() const
+{
+    if (!d_ptr->transformData)
+        return 1.;
+    return d_ptr->transformData->scale;
+}
+
+/*!
+    \since 4.6
+
+    Sets the scale \a factor of the item. The default scale factor is 1.0
+    (i.e., the item is not scaled). A scale factor of 0.0 will collapse the
+    item to a single point. If you provide a negative scale factor, the
+    item will be flipped and mirrored (i.e., rotated 180 degrees).
+
+    The item is scaled around its transform origin point, which by default
+    is (0, 0). You can select a different transformation origin by calling
+    setTransformOriginPoint().
+
+    The scale is combined with the item's rotation(), transform() and
+    transformations() to map the item's coordinate system to the parent item.
+
+    \sa scale(), setTransformOriginPoint(), {Transformations Example}
+*/
+void QGraphicsItem::setScale(qreal factor)
+{
+    prepareGeometryChange();
+    qreal newScale = factor;
+
+    if (d_ptr->flags & ItemSendsGeometryChanges) {
+        // Notify the item that the scale is changing.
+        const QVariant newScaleVariant(itemChange(ItemScaleChange, factor));
+        newScale = newScaleVariant.toReal();
+    }
+
+    if (!d_ptr->transformData)
+        d_ptr->transformData = new QGraphicsItemPrivate::TransformData;
+
+    if (d_ptr->transformData->scale == newScale)
+        return;
+
+    d_ptr->transformData->scale = newScale;
+    d_ptr->transformData->onlyTransform = false;
+    d_ptr->dirtySceneTransform = 1;
+
+    // Send post-notification.
+    if (d_ptr->flags & ItemSendsGeometryChanges)
+        itemChange(ItemScaleHasChanged, newScale);
+
+    if (d_ptr->isObject)
+        emit static_cast<QGraphicsObject *>(this)->scaleChanged();
+
+    d_ptr->transformChanged();
+}
+
+
+/*!
+    \since 4.6
+
+    Returns a list of graphics transforms that currently apply to this item.
+
+    QGraphicsTransform is for applying and controlling a chain of individual
+    transformation operations on an item. It's particularly useful in
+    animations, where each transform operation needs to be interpolated
+    independently, or differently.
+
+    The transformations are combined with the item's rotation(), scale() and
+    transform() to map the item's coordinate system to the parent item.
+
+    \sa scale(), rotation(), transformOriginPoint(), {Transformations}
+*/
+QList<QGraphicsTransform *> QGraphicsItem::transformations() const
+{
+    if (!d_ptr->transformData)
+        return QList<QGraphicsTransform *>();
+    return d_ptr->transformData->graphicsTransforms;
+}
+
+/*!
+    \since 4.6
+
+    Sets a list of graphics \a transformations (QGraphicsTransform) that
+    currently apply to this item.
+
+    If all you want is to rotate or scale an item, you should call setRotation()
+    or setScale() instead. If you want to set an arbitrary transformation on
+    an item, you can call setTransform().
+
+    QGraphicsTransform is for applying and controlling a chain of individual
+    transformation operations on an item. It's particularly useful in
+    animations, where each transform operation needs to be interpolated
+    independently, or differently.
+
+    The transformations are combined with the item's rotation(), scale() and
+    transform() to map the item's coordinate system to the parent item.
+
+    \sa scale(), setTransformOriginPoint(), {Transformations}
+*/
+void QGraphicsItem::setTransformations(const QList<QGraphicsTransform *> &transformations)
+{
+    prepareGeometryChange();
+    if (!d_ptr->transformData)
+        d_ptr->transformData = new QGraphicsItemPrivate::TransformData;
+    d_ptr->transformData->graphicsTransforms = transformations;
+    for (int i = 0; i < transformations.size(); ++i)
+        transformations.at(i)->d_func()->setItem(this);
+    d_ptr->transformData->onlyTransform = false;
+    d_ptr->dirtySceneTransform = 1;
+    d_ptr->transformChanged();
+}
+
+/*!
+    \internal
+*/
+void QGraphicsItemPrivate::prependGraphicsTransform(QGraphicsTransform *t)
+{
+    if (!transformData)
+        transformData = new QGraphicsItemPrivate::TransformData;
+    if (!transformData->graphicsTransforms.contains(t))
+        transformData->graphicsTransforms.prepend(t);
+
+    Q_Q(QGraphicsItem);
+    t->d_func()->setItem(q);
+    transformData->onlyTransform = false;
+    dirtySceneTransform = 1;
+    transformChanged();
+}
+
+/*!
+    \internal
+*/
+void QGraphicsItemPrivate::appendGraphicsTransform(QGraphicsTransform *t)
+{
+    if (!transformData)
+        transformData = new QGraphicsItemPrivate::TransformData;
+    if (!transformData->graphicsTransforms.contains(t))
+        transformData->graphicsTransforms.append(t);
+
+    Q_Q(QGraphicsItem);
+    t->d_func()->setItem(q);
+    transformData->onlyTransform = false;
+    dirtySceneTransform = 1;
+    transformChanged();
+}
+
+/*!
+    \since 4.6
+
+    Returns the origin point for the transformation in item coordinates.
+
+    The default is QPointF(0,0).
+
+    \sa setTransformOriginPoint(), {Transformations}
+*/
+QPointF QGraphicsItem::transformOriginPoint() const
+{
+    if (!d_ptr->transformData)
+        return QPointF(0,0);
+    return QPointF(d_ptr->transformData->xOrigin, d_ptr->transformData->yOrigin);
+}
+
+/*!
+    \since 4.6
+
+    Sets the \a origin point for the transformation in item coordinates.
+
+    \sa transformOriginPoint(), {Transformations}
+*/
+void QGraphicsItem::setTransformOriginPoint(const QPointF &origin)
+{
+    prepareGeometryChange();
+    QPointF newOrigin = origin;
+
+    if (d_ptr->flags & ItemSendsGeometryChanges) {
+        // Notify the item that the origin point is changing.
+        const QVariant newOriginVariant(itemChange(ItemTransformOriginPointChange,
+                                                   QVariant::fromValue<QPointF>(origin)));
+        newOrigin = newOriginVariant.toPointF();
+    }
+
+    if (!d_ptr->transformData)
+        d_ptr->transformData = new QGraphicsItemPrivate::TransformData;
+
+    if (d_ptr->transformData->xOrigin == newOrigin.x()
+        && d_ptr->transformData->yOrigin == newOrigin.y()) {
+        return;
+    }
+
+    d_ptr->transformData->xOrigin = newOrigin.x();
+    d_ptr->transformData->yOrigin = newOrigin.y();
+    d_ptr->transformData->onlyTransform = false;
+    d_ptr->dirtySceneTransform = 1;
+
+    // Send post-notification.
+    if (d_ptr->flags & ItemSendsGeometryChanges)
+        itemChange(ItemTransformOriginPointHasChanged, QVariant::fromValue<QPointF>(newOrigin));
+}
+
+/*!
+    \fn void QGraphicsItem::setTransformOriginPoint(qreal x, qreal y)
+
+    \since 4.6
+    \overload
+
+    Sets the origin point for the transformation in item coordinates.
+    This is equivalent to calling setTransformOriginPoint(QPointF(\a x, \a y)).
+
+    \sa setTransformOriginPoint(), {Transformations}
+*/
+
+
+/*!
+    \obsolete
+
+    Use sceneTransform() instead.
+
+    \sa transform(), setTransform(), scenePos(), {The Graphics View Coordinate System}
+*/
+QMatrix QGraphicsItem::sceneMatrix() const
+{
+    d_ptr->ensureSceneTransform();
+    return d_ptr->sceneTransform.toAffine();
+}
+
+
+/*!
+    \since 4.3
+
+    Returns this item's scene transformation matrix. This matrix can be used
+    to map coordinates and geometrical shapes from this item's local
+    coordinate system to the scene's coordinate system. To map coordinates
+    from the scene, you must first invert the returned matrix.
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 4
+
+    Unlike transform(), which returns only an item's local transformation, this
+    function includes the item's (and any parents') position, and all the transfomation properties.
+
+    \sa transform(), setTransform(), scenePos(), {The Graphics View Coordinate System}, {Transformations}
+*/
+QTransform QGraphicsItem::sceneTransform() const
+{
+    d_ptr->ensureSceneTransform();
+    return d_ptr->sceneTransform;
+}
+
+/*!
+    \since 4.3
+
+    Returns this item's device transformation matrix, using \a
+    viewportTransform to map from scene to device coordinates. This matrix can
+    be used to map coordinates and geometrical shapes from this item's local
+    coordinate system to the viewport's (or any device's) coordinate
+    system. To map coordinates from the viewport, you must first invert the
+    returned matrix.
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 5
+
+    This function is the same as combining this item's scene transform with
+    the view's viewport transform, but it also understands the
+    ItemIgnoresTransformations flag. The device transform can be used to do
+    accurate coordinate mapping (and collision detection) for untransformable
+    items.
+
+    \sa transform(), setTransform(), scenePos(), {The Graphics View Coordinate
+    System}, itemTransform()
+*/
+QTransform QGraphicsItem::deviceTransform(const QTransform &viewportTransform) const
+{
+    // Ensure we return the standard transform if we're not untransformable.
+    if (!d_ptr->itemIsUntransformable()) {
+        d_ptr->ensureSceneTransform();
+        return d_ptr->sceneTransform * viewportTransform;
+    }
+
+    // Find the topmost item that ignores view transformations.
+    const QGraphicsItem *untransformedAncestor = this;
+    QList<const QGraphicsItem *> parents;
+    while (untransformedAncestor && ((untransformedAncestor->d_ptr->ancestorFlags
+                                     & QGraphicsItemPrivate::AncestorIgnoresTransformations))) {
+        parents.prepend(untransformedAncestor);
+        untransformedAncestor = untransformedAncestor->parentItem();
+    }
+
+    if (!untransformedAncestor) {
+        // Assert in debug mode, continue in release.
+        Q_ASSERT_X(untransformedAncestor, "QGraphicsItem::deviceTransform",
+                   "Invalid object structure!");
+        return QTransform();
+    }
+
+    // First translate the base untransformable item.
+    untransformedAncestor->d_ptr->ensureSceneTransform();
+    QPointF mappedPoint = (untransformedAncestor->d_ptr->sceneTransform * viewportTransform).map(QPointF(0, 0));
+
+    // COMBINE
+    QTransform matrix = QTransform::fromTranslate(mappedPoint.x(), mappedPoint.y());
+    if (untransformedAncestor->d_ptr->transformData)
+        matrix = untransformedAncestor->d_ptr->transformData->computedFullTransform(&matrix);
+
+    // Then transform and translate all children.
+    for (int i = 0; i < parents.size(); ++i) {
+        const QGraphicsItem *parent = parents.at(i);
+        parent->d_ptr->combineTransformFromParent(&matrix);
+    }
+
+    return matrix;
+}
+
+/*!
+    \since 4.5
+
+    Returns a QTransform that maps coordinates from this item to \a other. If
+    \a ok is not null, and if there is no such transform, the boolean pointed
+    to by \a ok will be set to false; otherwise it will be set to true.
+
+    This transform provides an alternative to the mapToItem() or mapFromItem()
+    functions, by returning the appropriate transform so that you can map
+    shapes and coordinates yourself. It also helps you write more efficient
+    code when repeatedly mapping between the same two items.
+
+    \note In rare circumstances, there is no transform that maps between two
+    items.
+
+    \sa mapToItem(), mapFromItem(), deviceTransform()
+*/
+QTransform QGraphicsItem::itemTransform(const QGraphicsItem *other, bool *ok) const
+{
+    // Catch simple cases first.
+    if (other == 0) {
+        qWarning("QGraphicsItem::itemTransform: null pointer passed");
+        return QTransform();
+    }
+    if (other == this) {
+        if (ok)
+            *ok = true;
+        return QTransform();
+    }
+
+    QGraphicsItem *parent = d_ptr->parent;
+    const QGraphicsItem *otherParent = other->d_ptr->parent;
+
+    // This is other's child
+    if (parent == other) {
+        if (ok)
+            *ok = true;
+        QTransform x;
+        d_ptr->combineTransformFromParent(&x);
+        return x;
+    }
+
+    // This is other's parent
+    if (otherParent == this) {
+        const QPointF &otherPos = other->d_ptr->pos;
+        if (other->d_ptr->transformData) {
+            QTransform otherToParent;
+            other->d_ptr->combineTransformFromParent(&otherToParent);
+            return otherToParent.inverted(ok);
+        }
+        if (ok)
+            *ok = true;
+        return QTransform::fromTranslate(-otherPos.x(), -otherPos.y());
+    }
+
+    // Siblings
+    if (parent == otherParent) {
+        // COMBINE
+        const QPointF &itemPos = d_ptr->pos;
+        const QPointF &otherPos = other->d_ptr->pos;
+        if (!d_ptr->transformData && !other->d_ptr->transformData) {
+            QPointF delta = itemPos - otherPos;
+            if (ok)
+                *ok = true;
+            return QTransform::fromTranslate(delta.x(), delta.y());
+        }
+
+        QTransform itemToParent;
+        d_ptr->combineTransformFromParent(&itemToParent);
+        QTransform otherToParent;
+        other->d_ptr->combineTransformFromParent(&otherToParent);
+        return itemToParent * otherToParent.inverted(ok);
+    }
+
+    // Find the closest common ancestor. If the two items don't share an
+    // ancestor, then the only way is to combine their scene transforms.
+    const QGraphicsItem *commonAncestor = commonAncestorItem(other);
+    if (!commonAncestor) {
+        d_ptr->ensureSceneTransform();
+        other->d_ptr->ensureSceneTransform();
+        return d_ptr->sceneTransform * other->d_ptr->sceneTransform.inverted(ok);
+    }
+
+    // If the two items are cousins (in sibling branches), map both to the
+    // common ancestor, and combine the two transforms.
+    bool cousins = other != commonAncestor && this != commonAncestor;
+    if (cousins) {
+        bool good = false;
+        QTransform thisToScene = itemTransform(commonAncestor, &good);
+        QTransform otherToScene(Qt::Uninitialized);
+        if (good)
+            otherToScene = other->itemTransform(commonAncestor, &good);
+        if (!good) {
+            if (ok)
+                *ok = false;
+            return QTransform();
+        }
+        return thisToScene * otherToScene.inverted(ok);
+    }
+
+    // One is an ancestor of the other; walk the chain.
+    bool parentOfOther = isAncestorOf(other);
+    const QGraphicsItem *child = parentOfOther ? other : this;
+    const QGraphicsItem *root = parentOfOther ? this : other;
+
+    QTransform x;
+    const QGraphicsItem *p = child;
+    do {
+        p->d_ptr.data()->combineTransformToParent(&x);
+    } while ((p = p->d_ptr->parent) && p != root);
+    if (parentOfOther)
+        return x.inverted(ok);
+    if (ok)
+        *ok = true;
+    return x;
+}
+
+/*!
+    \obsolete
+
+    Sets the item's affine transformation matrix. This is a subset or the
+    item's full transformation matrix, and might not represent the item's full
+    transformation.
+
+    Use setTransform() instead.
+
+    \sa transform(), {The Graphics View Coordinate System}
+*/
+void QGraphicsItem::setMatrix(const QMatrix &matrix, bool combine)
+{
+    if (!d_ptr->transformData)
+        d_ptr->transformData = new QGraphicsItemPrivate::TransformData;
+
+    QTransform newTransform(combine ? QTransform(matrix) * d_ptr->transformData->transform : QTransform(matrix));
+    if (d_ptr->transformData->transform == newTransform)
+        return;
+
+    // Update and set the new transformation.
+    if (!(d_ptr->flags & ItemSendsGeometryChanges)) {
+        d_ptr->setTransformHelper(newTransform);
+        return;
+    }
+
+    // Notify the item that the transformation matrix is changing.
+    const QVariant newMatrixVariant = QVariant::fromValue<QMatrix>(newTransform.toAffine());
+    newTransform = QTransform(qvariant_cast<QMatrix>(itemChange(ItemMatrixChange, newMatrixVariant)));
+    if (d_ptr->transformData->transform == newTransform)
+        return;
+
+    // Update and set the new transformation.
+    d_ptr->setTransformHelper(newTransform);
+
+    // Send post-notification.
+    itemChange(ItemTransformHasChanged, QVariant::fromValue<QTransform>(newTransform));
+}
+
+/*!
+    \since 4.3
+
+    Sets the item's current transformation matrix to \a matrix.
+
+    If \a combine is true, then \a matrix is combined with the current matrix;
+    otherwise, \a matrix \e replaces the current matrix. \a combine is false
+    by default.
+
+    To simplify interation with items using a transformed view, QGraphicsItem
+    provides mapTo... and mapFrom... functions that can translate between
+    items' and the scene's coordinates. For example, you can call mapToScene()
+    to map an item coordiate to a scene coordinate, or mapFromScene() to map
+    from scene coordinates to item coordinates.
+
+    The transformation matrix is combined with the item's rotation(), scale()
+    and transformations() into a combined transformation that maps the item's
+    coordinate system to its parent.
+
+    \sa transform(), setRotation(), setScale(), setTransformOriginPoint(), {The Graphics View Coordinate System}, {Transformations}
+*/
+void QGraphicsItem::setTransform(const QTransform &matrix, bool combine)
+{
+    if (!d_ptr->transformData)
+        d_ptr->transformData = new QGraphicsItemPrivate::TransformData;
+
+    QTransform newTransform(combine ? matrix * d_ptr->transformData->transform : matrix);
+    if (d_ptr->transformData->transform == newTransform)
+        return;
+
+    // Update and set the new transformation.
+    if (!(d_ptr->flags & (ItemSendsGeometryChanges | ItemSendsScenePositionChanges))) {
+        d_ptr->setTransformHelper(newTransform);
+        if (d_ptr->scenePosDescendants)
+            d_ptr->sendScenePosChange();
+        return;
+    }
+
+    // Notify the item that the transformation matrix is changing.
+    const QVariant newTransformVariant(itemChange(ItemTransformChange,
+                                                  QVariant::fromValue<QTransform>(newTransform)));
+    newTransform = qvariant_cast<QTransform>(newTransformVariant);
+    if (d_ptr->transformData->transform == newTransform)
+        return;
+
+    // Update and set the new transformation.
+    d_ptr->setTransformHelper(newTransform);
+
+    // Send post-notification.
+    itemChange(ItemTransformHasChanged, newTransformVariant);
+    d_ptr->sendScenePosChange();
+}
+
+/*!
+    \obsolete
+
+    Use resetTransform() instead.
+*/
+void QGraphicsItem::resetMatrix()
+{
+    resetTransform();
+}
+
+/*!
+    \since 4.3
+
+    Resets this item's transformation matrix to the identity matrix or
+    all the transformation properties to their default values.
+    This is equivalent to calling \c setTransform(QTransform()).
+
+    \sa setTransform(), transform()
+*/
+void QGraphicsItem::resetTransform()
+{
+    setTransform(QTransform(), false);
+}
+
+/*!
+    \obsolete
+
+    Use
+
+    \code
+    setRotation(rotation() + angle);
+    \endcode
+
+    instead.
+
+    Rotates the current item transformation \a angle degrees clockwise around
+    its origin. To translate around an arbitrary point (x, y), you need to
+    combine translation and rotation with setTransform().
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 6
+
+    \sa setTransform(), transform(), scale(), shear(), translate()
+*/
+void QGraphicsItem::rotate(qreal angle)
+{
+    setTransform(QTransform().rotate(angle), true);
+}
+
+/*!
+    \obsolete
+
+    Use
+
+    \code
+    setTransform(QTransform::fromScale(sx, sy), true);
+    \endcode
+
+    instead.
+
+    Scales the current item transformation by (\a sx, \a sy) around its
+    origin. To scale from an arbitrary point (x, y), you need to combine
+    translation and scaling with setTransform().
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 7
+
+    \sa setTransform(), transform()
+*/
+void QGraphicsItem::scale(qreal sx, qreal sy)
+{
+    setTransform(QTransform::fromScale(sx, sy), true);
+}
+
+/*!
+    \obsolete
+
+    Use
+
+    \code
+    setTransform(QTransform().shear(sh, sv), true);
+    \endcode
+
+    instead.
+
+    Shears the current item transformation by (\a sh, \a sv).
+
+    \sa setTransform(), transform()
+*/
+void QGraphicsItem::shear(qreal sh, qreal sv)
+{
+    setTransform(QTransform().shear(sh, sv), true);
+}
+
+/*!
+    \obsolete
+
+    Use setPos() or setTransformOriginPoint() instead. For identical
+    behavior, use
+
+    \code
+    setTransform(QTransform::fromTranslate(dx, dy), true);
+    \endcode
+
+    Translates the current item transformation by (\a dx, \a dy).
+
+    If all you want is to move an item, you should call moveBy() or
+    setPos() instead; this function changes the item's translation,
+    which is conceptually separate from its position.
+
+    \sa setTransform(), transform()
+*/
+void QGraphicsItem::translate(qreal dx, qreal dy)
+{
+    setTransform(QTransform::fromTranslate(dx, dy), true);
+}
+
+/*!
+    This virtual function is called twice for all items by the
+    QGraphicsScene::advance() slot. In the first phase, all items are called
+    with \a phase == 0, indicating that items on the scene are about to
+    advance, and then all items are called with \a phase == 1. Reimplement
+    this function to update your item if you need simple scene-controlled
+    animation.
+
+    The default implementation does nothing.
+
+    For individual item animation, an alternative to this function is to
+    either use QGraphicsItemAnimation, or to multiple-inherit from QObject and
+    QGraphicsItem, and animate your item using QObject::startTimer() and
+    QObject::timerEvent().
+
+    \sa QGraphicsItemAnimation, QTimeLine
+*/
+void QGraphicsItem::advance(int phase)
+{
+    Q_UNUSED(phase);
+}
+
+/*!
+    Returns the Z-value of the item. The Z-value affects the stacking order of
+    sibling (neighboring) items.
+
+    The default Z-value is 0.
+
+    \sa setZValue(), {QGraphicsItem#Sorting}{Sorting}, stackBefore(), ItemStacksBehindParent
+*/
+qreal QGraphicsItem::zValue() const
+{
+    return d_ptr->z;
+}
+
+/*!
+    Sets the Z-value of the item to \a z. The Z value decides the stacking
+    order of sibling (neighboring) items. A sibling item of high Z value will
+    always be drawn on top of another sibling item with a lower Z value.
+
+    If you restore the Z value, the item's insertion order will decide its
+    stacking order.
+
+    The Z-value does not affect the item's size in any way.
+
+    The default Z-value is 0.
+
+    \sa zValue(), {QGraphicsItem#Sorting}{Sorting}, stackBefore(), ItemStacksBehindParent
+*/
+void QGraphicsItem::setZValue(qreal z)
+{
+    const QVariant newZVariant(itemChange(ItemZValueChange, z));
+    qreal newZ = newZVariant.toReal();
+    if (newZ == d_ptr->z)
+        return;
+
+    if (d_ptr->scene && d_ptr->scene->d_func()->indexMethod != QGraphicsScene::NoIndex) {
+        // Z Value has changed, we have to notify the index.
+        d_ptr->scene->d_func()->index->itemChange(this, ItemZValueChange, &newZ);
+    }
+
+    d_ptr->z = newZ;
+    if (d_ptr->parent)
+        d_ptr->parent->d_ptr->needSortChildren = 1;
+    else if (d_ptr->scene)
+        d_ptr->scene->d_func()->needSortTopLevelItems = 1;
+
+    if (d_ptr->scene)
+        d_ptr->scene->d_func()->markDirty(this, QRectF(), /*invalidateChildren=*/true);
+
+    itemChange(ItemZValueHasChanged, newZVariant);
+
+    if (d_ptr->flags & ItemNegativeZStacksBehindParent)
+        setFlag(QGraphicsItem::ItemStacksBehindParent, z < qreal(0.0));
+
+    if (d_ptr->isObject)
+        emit static_cast<QGraphicsObject *>(this)->zChanged();
+}
+
+/*!
+    \internal
+
+    Ensures that the list of children is sorted by insertion order, and that
+    the siblingIndexes are packed (no gaps), and start at 0.
+
+    ### This function is almost identical to
+    QGraphicsScenePrivate::ensureSequentialTopLevelSiblingIndexes().
+*/
+void QGraphicsItemPrivate::ensureSequentialSiblingIndex()
+{
+    if (!sequentialOrdering) {
+        qSort(children.begin(), children.end(), insertionOrder);
+        sequentialOrdering = 1;
+        needSortChildren = 1;
+    }
+    if (holesInSiblingIndex) {
+        holesInSiblingIndex = 0;
+        for (int i = 0; i < children.size(); ++i)
+            children[i]->d_ptr->siblingIndex = i;
+    }
+}
+
+/*!
+    \internal
+*/
+inline void QGraphicsItemPrivate::sendScenePosChange()
+{
+    Q_Q(QGraphicsItem);
+    if (scene) {
+        if (flags & QGraphicsItem::ItemSendsScenePositionChanges)
+            q->itemChange(QGraphicsItem::ItemScenePositionHasChanged, q->scenePos());
+        if (scenePosDescendants) {
+            foreach (QGraphicsItem *item, scene->d_func()->scenePosItems) {
+                if (q->isAncestorOf(item))
+                    item->itemChange(QGraphicsItem::ItemScenePositionHasChanged, item->scenePos());
+            }
+        }
+    }
+}
+
+/*!
+    \since 4.6
+
+    Stacks this item before \a sibling, which must be a sibling item (i.e., the
+    two items must share the same parent item, or must both be toplevel items).
+    The \a sibling must have the same Z value as this item, otherwise calling
+    this function will have no effect.
+
+    By default, all sibling items are stacked by insertion order (i.e., the
+    first item you add is drawn before the next item you add). If two items' Z
+    values are different, then the item with the highest Z value is drawn on
+    top. When the Z values are the same, the insertion order will decide the
+    stacking order.
+
+    \sa setZValue(), ItemStacksBehindParent, {QGraphicsItem#Sorting}{Sorting}
+*/
+void QGraphicsItem::stackBefore(const QGraphicsItem *sibling)
+{
+    if (sibling == this)
+        return;
+    if (!sibling || d_ptr->parent != sibling->parentItem()) {
+        qWarning("QGraphicsItem::stackUnder: cannot stack under %p, which must be a sibling", sibling);
+        return;
+    }
+    QList<QGraphicsItem *> *siblings = d_ptr->parent
+                                       ? &d_ptr->parent->d_ptr->children
+                                       : (d_ptr->scene ? &d_ptr->scene->d_func()->topLevelItems : 0);
+    if (!siblings) {
+        qWarning("QGraphicsItem::stackUnder: cannot stack under %p, which must be a sibling", sibling);
+        return;
+    }
+
+    // First, make sure that the sibling indexes have no holes. This also
+    // marks the children list for sorting.
+    if (d_ptr->parent)
+        d_ptr->parent->d_ptr->ensureSequentialSiblingIndex();
+    else
+        d_ptr->scene->d_func()->ensureSequentialTopLevelSiblingIndexes();
+
+    // Only move items with the same Z value, and that need moving.
+    int siblingIndex = sibling->d_ptr->siblingIndex;
+    int myIndex = d_ptr->siblingIndex;
+    if (myIndex >= siblingIndex) {
+        siblings->move(myIndex, siblingIndex);
+        // Fixup the insertion ordering.
+        for (int i = 0; i < siblings->size(); ++i) {
+            int &index = siblings->at(i)->d_ptr->siblingIndex;
+            if (i != siblingIndex && index >= siblingIndex && index <= myIndex)
+                ++index;
+        }
+        d_ptr->siblingIndex = siblingIndex;
+        for (int i = 0; i < siblings->size(); ++i) {
+            int &index = siblings->at(i)->d_ptr->siblingIndex;
+            if (i != siblingIndex && index >= siblingIndex && index <= myIndex)
+                siblings->at(i)->d_ptr->siblingOrderChange();
+        }
+        d_ptr->siblingOrderChange();
+    }
+}
+
+/*!
+    Returns the bounding rect of this item's descendants (i.e., its
+    children, their children, etc.) in local coordinates. The
+    rectangle will contain all descendants after they have been mapped
+    to local coordinates. If the item has no children, this function
+    returns an empty QRectF.
+
+    This does not include this item's own bounding rect; it only returns
+    its descendants' accumulated bounding rect. If you need to include this
+    item's bounding rect, you can add boundingRect() to childrenBoundingRect()
+    using QRectF::operator|().
+
+    This function is linear in complexity; it determines the size of the
+    returned bounding rect by iterating through all descendants.
+
+    \sa boundingRect(), sceneBoundingRect()
+*/
+QRectF QGraphicsItem::childrenBoundingRect() const
+{
+    if (!d_ptr->dirtyChildrenBoundingRect)
+        return d_ptr->childrenBoundingRect;
+
+    d_ptr->childrenBoundingRect = QRectF();
+    d_ptr->childrenBoundingRectHelper(0, &d_ptr->childrenBoundingRect, 0);
+    d_ptr->dirtyChildrenBoundingRect = 0;
+    return d_ptr->childrenBoundingRect;
+}
+
+/*!
+    \fn virtual QRectF QGraphicsItem::boundingRect() const = 0
+
+    This pure virtual function defines the outer bounds of the item as
+    a rectangle; all painting must be restricted to inside an item's
+    bounding rect. QGraphicsView uses this to determine whether the
+    item requires redrawing.
+
+    Although the item's shape can be arbitrary, the bounding rect is
+    always rectangular, and it is unaffected by the items'
+    transformation.
+
+    If you want to change the item's bounding rectangle, you must first call
+    prepareGeometryChange(). This notifies the scene of the imminent change,
+    so that its can update its item geometry index; otherwise, the scene will
+    be unaware of the item's new geometry, and the results are undefined
+    (typically, rendering artifacts are left around in the view).
+
+    Reimplement this function to let QGraphicsView determine what
+    parts of the widget, if any, need to be redrawn.
+
+    Note: For shapes that paint an outline / stroke, it is important
+    to include half the pen width in the bounding rect. It is not
+    necessary to compensate for antialiasing, though.
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 8
+
+    \sa boundingRegion(), shape(), contains(), {The Graphics View Coordinate
+    System}, prepareGeometryChange()
+*/
+
+/*!
+    Returns the bounding rect of this item in scene coordinates, by combining
+    sceneTransform() with boundingRect().
+
+    \sa boundingRect(), {The Graphics View Coordinate System}
+*/
+QRectF QGraphicsItem::sceneBoundingRect() const
+{
+    // Find translate-only offset
+    // COMBINE
+    QPointF offset;
+    const QGraphicsItem *parentItem = this;
+    const QGraphicsItemPrivate *itemd;
+    do {
+        itemd = parentItem->d_ptr.data();
+        if (itemd->transformData)
+            break;
+        offset += itemd->pos;
+    } while ((parentItem = itemd->parent));
+
+    QRectF br = boundingRect();
+    br.translate(offset);
+    if (!parentItem)
+        return br;
+    if (parentItem->d_ptr->hasTranslateOnlySceneTransform()) {
+        br.translate(parentItem->d_ptr->sceneTransform.dx(), parentItem->d_ptr->sceneTransform.dy());
+        return br;
+    }
+    return parentItem->d_ptr->sceneTransform.mapRect(br);
+}
+
+/*!
+    Returns the shape of this item as a QPainterPath in local
+    coordinates. The shape is used for many things, including collision
+    detection, hit tests, and for the QGraphicsScene::items() functions.
+
+    The default implementation calls boundingRect() to return a simple
+    rectangular shape, but subclasses can reimplement this function to return
+    a more accurate shape for non-rectangular items. For example, a round item
+    may choose to return an elliptic shape for better collision detection. For
+    example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 9
+
+    The outline of a shape can vary depending on the width and style of the
+    pen used when drawing. If you want to include this outline in the item's
+    shape, you can create a shape from the stroke using QPainterPathStroker.
+
+    This function is called by the default implementations of contains() and
+    collidesWithPath().
+
+    \sa boundingRect(), contains(), prepareGeometryChange(), QPainterPathStroker
+*/
+QPainterPath QGraphicsItem::shape() const
+{
+    QPainterPath path;
+    path.addRect(boundingRect());
+    return path;
+}
+
+/*!
+    Returns true if this item is clipped. An item is clipped if it has either
+    set the \l ItemClipsToShape flag, or if it or any of its ancestors has set
+    the \l ItemClipsChildrenToShape flag.
+
+    Clipping affects the item's appearance (i.e., painting), as well as mouse
+    and hover event delivery.
+
+    \sa clipPath(), shape(), setFlags()
+*/
+bool QGraphicsItem::isClipped() const
+{
+    Q_D(const QGraphicsItem);
+    return (d->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren)
+        || (d->flags & QGraphicsItem::ItemClipsToShape);
+}
+
+/*!
+    \since 4.5
+
+    Returns this item's clip path, or an empty QPainterPath if this item is
+    not clipped. The clip path constrains the item's appearance and
+    interaction (i.e., restricts the area the item can draw, and it also
+    restricts the area that the item receives events).
+
+    You can enable clipping by setting the ItemClipsToShape or
+    ItemClipsChildrenToShape flags. The item's clip path is calculated by
+    intersecting all clipping ancestors' shapes. If the item sets
+    ItemClipsToShape, the final clip is intersected with the item's own shape.
+
+    \note Clipping introduces a performance penalty for all items involved;
+    you should generally avoid using clipping if you can (e.g., if your items
+    always draw inside boundingRect() or shape() boundaries, clipping is not
+    necessary).
+
+    \sa isClipped(), shape(), setFlags()
+*/
+QPainterPath QGraphicsItem::clipPath() const
+{
+    Q_D(const QGraphicsItem);
+    if (!isClipped())
+        return QPainterPath();
+
+    const QRectF thisBoundingRect(boundingRect());
+    if (thisBoundingRect.isEmpty())
+        return QPainterPath();
+
+    QPainterPath clip;
+    // Start with the item's bounding rect.
+    clip.addRect(thisBoundingRect);
+
+    if (d->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren) {
+        const QGraphicsItem *parent = this;
+        const QGraphicsItem *lastParent = this;
+
+        // Intersect any in-between clips starting at the top and moving downwards.
+        while ((parent = parent->d_ptr->parent)) {
+            if (parent->d_ptr->flags & ItemClipsChildrenToShape) {
+                // Map clip to the current parent and intersect with its shape/clipPath
+                clip = lastParent->itemTransform(parent).map(clip);
+                clip = clip.intersected(parent->shape());
+                if (clip.isEmpty())
+                    return clip;
+                lastParent = parent;
+            }
+
+            if (!(parent->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren))
+                break;
+        }
+
+        if (lastParent != this) {
+            // Map clip back to the item's transform.
+            // ### what if itemtransform fails
+            clip = lastParent->itemTransform(this).map(clip);
+        }
+    }
+
+    if (d->flags & ItemClipsToShape)
+        clip = clip.intersected(shape());
+
+    return clip;
+}
+
+/*!
+    Returns true if this item contains \a point, which is in local
+    coordinates; otherwise, false is returned. It is most often called from
+    QGraphicsView to determine what item is under the cursor, and for that
+    reason, the implementation of this function should be as light-weight as
+    possible.
+
+    By default, this function calls shape(), but you can reimplement it in a
+    subclass to provide a (perhaps more efficient) implementation.
+
+    \sa shape(), boundingRect(), collidesWithPath()
+*/
+bool QGraphicsItem::contains(const QPointF &point) const
+{
+    return isClipped() ? clipPath().contains(point) : shape().contains(point);
+}
+
+/*!
+
+    Returns true if this item collides with \a other; otherwise
+    returns false.
+
+    The \a mode is applied to \a other, and the resulting shape or
+    bounding rectangle is then compared to this item's shape. The
+    default value for \a mode is Qt::IntersectsItemShape; \a other
+    collides with this item if it either intersects, contains, or is
+    contained by this item's shape (see Qt::ItemSelectionMode for
+    details).
+
+    The default implementation is based on shape intersection, and it calls
+    shape() on both items. Because the complexity of arbitrary shape-shape
+    intersection grows with an order of magnitude when the shapes are complex,
+    this operation can be noticably time consuming. You have the option of
+    reimplementing this function in a subclass of QGraphicsItem to provide a
+    custom algorithm. This allows you to make use of natural constraints in
+    the shapes of your own items, in order to improve the performance of the
+    collision detection. For instance, two untransformed perfectly circular
+    items' collision can be determined very efficiently by comparing their
+    positions and radii.
+
+    Keep in mind that when reimplementing this function and calling shape() or
+    boundingRect() on \a other, the returned coordinates must be mapped to
+    this item's coordinate system before any intersection can take place.
+
+    \sa contains(), shape()
+*/
+bool QGraphicsItem::collidesWithItem(const QGraphicsItem *other, Qt::ItemSelectionMode mode) const
+{
+    if (other == this)
+        return true;
+    if (!other)
+        return false;
+    // The items share the same clip if their closest clipper is the same, or
+    // if one clips the other.
+    bool clips = (d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren);
+    bool otherClips = (other->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren);
+    if (clips || otherClips) {
+        const QGraphicsItem *closestClipper = isAncestorOf(other) ? this : parentItem();
+        while (closestClipper && !(closestClipper->flags() & ItemClipsChildrenToShape))
+            closestClipper = closestClipper->parentItem();
+        const QGraphicsItem *otherClosestClipper = other->isAncestorOf(this) ? other : other->parentItem();
+        while (otherClosestClipper && !(otherClosestClipper->flags() & ItemClipsChildrenToShape))
+            otherClosestClipper = otherClosestClipper->parentItem();
+        if (closestClipper == otherClosestClipper) {
+            d_ptr->localCollisionHack = 1;
+            bool res = collidesWithPath(mapFromItem(other, other->shape()), mode);
+            d_ptr->localCollisionHack = 0;
+            return res;
+        }
+    }
+
+    QPainterPath otherShape = other->isClipped() ? other->clipPath() : other->shape();
+    return collidesWithPath(mapFromItem(other, otherShape), mode);
+}
+
+/*!
+    Returns true if this item collides with \a path.
+
+    The collision is determined by \a mode. The default value for \a mode is
+    Qt::IntersectsItemShape; \a path collides with this item if it either
+    intersects, contains, or is contained by this item's shape.
+
+    Note that this function checks whether the item's shape or
+    bounding rectangle (depending on \a mode) is contained within \a
+    path, and not whether \a path is contained within the items shape
+    or bounding rectangle.
+
+    \sa collidesWithItem(), contains(), shape()
+*/
+bool QGraphicsItem::collidesWithPath(const QPainterPath &path, Qt::ItemSelectionMode mode) const
+{
+    if (path.isEmpty()) {
+        // No collision with empty paths.
+        return false;
+    }
+
+    QRectF rectA(boundingRect());
+    _q_adjustRect(&rectA);
+    QRectF rectB(path.controlPointRect());
+    _q_adjustRect(&rectB);
+    if (!rectA.intersects(rectB)) {
+        // This we can determine efficiently. If the two rects neither
+        // intersect nor contain eachother, then the two items do not collide.
+        return false;
+    }
+
+    // For further testing, we need this item's shape or bounding rect.
+    QPainterPath thisShape;
+    if (mode == Qt::IntersectsItemShape || mode == Qt::ContainsItemShape)
+        thisShape = (isClipped() && !d_ptr->localCollisionHack) ? clipPath() : shape();
+    else
+        thisShape.addRect(rectA);
+
+    if (thisShape == QPainterPath()) {
+        // Empty shape? No collision.
+        return false;
+    }
+
+    // Use QPainterPath boolean operations to determine the collision, O(N*logN).
+    if (mode == Qt::IntersectsItemShape || mode == Qt::IntersectsItemBoundingRect)
+        return path.intersects(thisShape);
+    return path.contains(thisShape);
+}
+
+/*!
+    Returns a list of all items that collide with this item.
+
+    The way collisions are detected is determined by applying \a mode
+    to items that are compared to this item, i.e., each item's shape
+    or bounding rectangle is checked against this item's shape. The
+    default value for \a mode is Qt::IntersectsItemShape.
+
+    \sa collidesWithItem()
+*/
+QList<QGraphicsItem *> QGraphicsItem::collidingItems(Qt::ItemSelectionMode mode) const
+{
+    if (d_ptr->scene)
+        return d_ptr->scene->collidingItems(this, mode);
+    return QList<QGraphicsItem *>();
+}
+
+/*!
+    Returns true if this item's bounding rect is completely obscured by the
+    opaque shape of any of colliding items above it (i.e., with a higher Z
+    value than this item).
+
+    Its implementation is based on calling isObscuredBy(), which you can
+    reimplement to provide a custom obscurity algorithm.
+
+  \sa opaqueArea()
+*/
+bool QGraphicsItem::isObscured() const
+{
+    return isObscured(QRectF());
+}
+
+/*!
+    \internal
+
+    Item obscurity helper function.
+
+    Returns true if the subrect \a rect of \a item's bounding rect is obscured
+    by \a other (i.e., \a other's opaque area covers \a item's \a rect
+    completely. \a other is assumed to already be "on top of" \a item
+    wrt. stacking order.
+*/
+static bool qt_QGraphicsItem_isObscured(const QGraphicsItem *item,
+                                        const QGraphicsItem *other,
+                                        const QRectF &rect)
+{
+    return other->mapToItem(item, other->opaqueArea()).contains(rect);
+}
+
+/*!
+    \overload
+    \since 4.3
+
+    Returns true if \a rect is completely obscured by the opaque shape of any
+    of colliding items above it (i.e., with a higher Z value than this item).
+
+    Unlike the default isObscured() function, this function does not call
+    isObscuredBy().
+
+    \sa opaqueArea()
+*/
+bool QGraphicsItem::isObscured(const QRectF &rect) const
+{
+    Q_D(const QGraphicsItem);
+    if (!d->scene)
+        return false;
+
+    QRectF br = boundingRect();
+    QRectF testRect = rect.isNull() ? br : rect;
+
+    foreach (QGraphicsItem *item, d->scene->items(mapToScene(br), Qt::IntersectsItemBoundingRect)) {
+        if (item == this)
+            break;
+        if (qt_QGraphicsItem_isObscured(this, item, testRect))
+            return true;
+    }
+    return false;
+}
+
+/*!
+    \fn bool QGraphicsItem::isObscured(qreal x, qreal y, qreal w, qreal h) const
+    \since 4.3
+
+    This convenience function is equivalent to calling isObscured(QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    Returns true if this item's bounding rect is completely obscured by the
+    opaque shape of \a item.
+
+    The base implementation maps \a item's opaqueArea() to this item's
+    coordinate system, and then checks if this item's boundingRect() is fully
+    contained within the mapped shape.
+
+    You can reimplement this function to provide a custom algorithm for
+    determining whether this item is obscured by \a item.
+
+    \sa opaqueArea(), isObscured()
+*/
+bool QGraphicsItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    if (!item)
+        return false;
+    return qt_closestItemFirst(item, this)
+        && qt_QGraphicsItem_isObscured(this, item, boundingRect());
+}
+
+/*!
+    This virtual function returns a shape representing the area where this
+    item is opaque. An area is opaque if it is filled using an opaque brush or
+    color (i.e., not transparent).
+
+    This function is used by isObscuredBy(), which is called by underlying
+    items to determine if they are obscured by this item.
+
+    The default implementation returns an empty QPainterPath, indicating that
+    this item is completely transparent and does not obscure any other items.
+
+    \sa isObscuredBy(), isObscured(), shape()
+*/
+QPainterPath QGraphicsItem::opaqueArea() const
+{
+    return QPainterPath();
+}
+
+/*!
+    \since 4.4
+
+    Returns the bounding region for this item. The coordinate space of the
+    returned region depends on \a itemToDeviceTransform. If you pass an
+    identity QTransform as a parameter, this function will return a local
+    coordinate region.
+
+    The bounding region describes a coarse outline of the item's visual
+    contents. Although it's expensive to calculate, it's also more precise
+    than boundingRect(), and it can help to avoid unnecessary repainting when
+    an item is updated. This is particularly efficient for thin items (e.g.,
+    lines or simple polygons). You can tune the granularity for the bounding
+    region by calling setBoundingRegionGranularity(). The default granularity
+    is 0; in which the item's bounding region is the same as its bounding
+    rect.
+
+    \a itemToDeviceTransform is the transformation from item coordinates to
+    device coordinates. If you want this function to return a QRegion in scene
+    coordinates, you can pass sceneTransform() as an argument.
+
+    \sa boundingRegionGranularity()
+*/
+QRegion QGraphicsItem::boundingRegion(const QTransform &itemToDeviceTransform) const
+{
+    // ### Ideally we would have a better way to generate this region,
+    // preferably something in the lines of QPainterPath::toRegion(QTransform)
+    // coupled with a way to generate a painter path from a set of painter
+    // operations (e.g., QPicture::toPainterPath() or so). The current
+    // approach generates a bitmap with the size of the item's bounding rect
+    // in device coordinates, scaled by b.r.granularity, then paints the item
+    // into the bitmap, converts the result to a QRegion and scales the region
+    // back to device space with inverse granularity.
+    qreal granularity = boundingRegionGranularity();
+    QRect deviceRect = itemToDeviceTransform.mapRect(boundingRect()).toRect();
+    _q_adjustRect(&deviceRect);
+    if (granularity == 0.0)
+        return QRegion(deviceRect);
+
+    int pad = 1;
+    QSize bitmapSize(qMax(1, int(deviceRect.width() * granularity) + pad * 2),
+                     qMax(1, int(deviceRect.height() * granularity) + pad * 2));
+    QImage mask(bitmapSize, QImage::Format_ARGB32_Premultiplied);
+    mask.fill(0);
+    QPainter p(&mask);
+    p.setRenderHints(QPainter::Antialiasing);
+
+    // Transform painter (### this code is from QGraphicsScene::drawItemHelper
+    // and doesn't work properly with perspective transformations).
+    QPointF viewOrigo = itemToDeviceTransform.map(QPointF(0,  0));
+    QPointF offset = viewOrigo - deviceRect.topLeft();
+    p.scale(granularity, granularity);
+    p.translate(offset);
+    p.translate(pad, pad);
+    p.setWorldTransform(itemToDeviceTransform, true);
+    p.translate(itemToDeviceTransform.inverted().map(QPointF(0, 0)));
+
+    // Render
+    QStyleOptionGraphicsItem option;
+    const_cast<QGraphicsItem *>(this)->paint(&p, &option, 0);
+    p.end();
+
+    // Transform QRegion back to device space
+    QTransform unscale = QTransform::fromScale(1 / granularity, 1 / granularity);
+    QRegion r;
+    QBitmap colorMask = QBitmap::fromImage(mask.createMaskFromColor(0));
+    foreach (const QRect &rect, QRegion( colorMask ).rects()) {
+        QRect xrect = unscale.mapRect(rect).translated(deviceRect.topLeft() - QPoint(pad, pad));
+        r += xrect.adjusted(-1, -1, 1, 1) & deviceRect;
+    }
+    return r;
+}
+
+/*!
+    \since 4.4
+
+    Returns the item's bounding region granularity; a value between and
+    including 0 and 1. The default value is 0 (i.e., the lowest granularity,
+    where the bounding region corresponds to the item's bounding rectangle).
+
+\omit
+### NOTE
+\endomit
+
+    \sa setBoundingRegionGranularity()
+*/
+qreal QGraphicsItem::boundingRegionGranularity() const
+{
+    return d_ptr->hasBoundingRegionGranularity
+        ? qvariant_cast<qreal>(d_ptr->extra(QGraphicsItemPrivate::ExtraBoundingRegionGranularity))
+        : 0;
+}
+
+/*!
+    \since 4.4
+    Sets the bounding region granularity to \a granularity; a value between
+    and including 0 and 1. The default value is 0 (i.e., the lowest
+    granularity, where the bounding region corresponds to the item's bounding
+    rectangle).
+
+    The granularity is used by boundingRegion() to calculate how fine the
+    bounding region of the item should be. The highest achievable granularity
+    is 1, where boundingRegion() will return the finest outline possible for
+    the respective device (e.g., for a QGraphicsView viewport, this gives you
+    a pixel-perfect bounding region). The lowest possible granularity is
+    0. The value of \a granularity describes the ratio between device
+    resolution and the resolution of the bounding region (e.g., a value of
+    0.25 will provide a region where each chunk corresponds to 4x4 device
+    units / pixels).
+
+    \sa boundingRegionGranularity()
+*/
+void QGraphicsItem::setBoundingRegionGranularity(qreal granularity)
+{
+    if (granularity < 0.0 || granularity > 1.0) {
+        qWarning("QGraphicsItem::setBoundingRegionGranularity: invalid granularity %g", granularity);
+        return;
+    }
+    if (granularity == 0.0) {
+        d_ptr->unsetExtra(QGraphicsItemPrivate::ExtraBoundingRegionGranularity);
+        d_ptr->hasBoundingRegionGranularity = 0;
+        return;
+    }
+    d_ptr->hasBoundingRegionGranularity = 1;
+    d_ptr->setExtra(QGraphicsItemPrivate::ExtraBoundingRegionGranularity,
+                    QVariant::fromValue<qreal>(granularity));
+}
+
+/*!
+    \fn virtual void QGraphicsItem::paint(QPainter *painter, const
+    QStyleOptionGraphicsItem *option, QWidget *widget = 0) = 0
+
+    This function, which is usually called by QGraphicsView, paints the
+    contents of an item in local coordinates.
+
+    Reimplement this function in a QGraphicsItem subclass to provide the
+    item's painting implementation, using \a painter. The \a option parameter
+    provides style options for the item, such as its state, exposed area and
+    its level-of-detail hints. The \a widget argument is optional. If
+    provided, it points to the widget that is being painted on; otherwise, it
+    is 0. For cached painting, \a widget is always 0.
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 10
+
+    The painter's pen is 0-width by default, and its pen is initialized to the
+    QPalette::Text brush from the paint device's palette. The brush is
+    initialized to QPalette::Window.
+
+    Make sure to constrain all painting inside the boundaries of
+    boundingRect() to avoid rendering artifacts (as QGraphicsView does not
+    clip the painter for you). In particular, when QPainter renders the
+    outline of a shape using an assigned QPen, half of the outline will be
+    drawn outside, and half inside, the shape you're rendering (e.g., with a
+    pen width of 2 units, you must draw outlines 1 unit inside
+    boundingRect()). QGraphicsItem does not support use of cosmetic pens with
+    a non-zero width.
+
+    All painting is done in local coordinates.
+
+    \sa setCacheMode(), QPen::width(), {Item Coordinates}, ItemUsesExtendedStyleOption
+*/
+
+/*!
+    \internal
+    Returns true if we can discard an update request; otherwise false.
+*/
+bool QGraphicsItemPrivate::discardUpdateRequest(bool ignoreVisibleBit, bool ignoreDirtyBit,
+                                                bool ignoreOpacity) const
+{
+    // No scene, or if the scene is updating everything, means we have nothing
+    // to do. The only exception is if the scene tracks the growing scene rect.
+    return !scene
+           || (!visible && !ignoreVisibleBit && !this->ignoreVisible)
+           || (!ignoreDirtyBit && fullUpdatePending)
+           || (!ignoreOpacity && !this->ignoreOpacity && childrenCombineOpacity() && isFullyTransparent());
+}
+
+/*!
+    \internal
+*/
+int QGraphicsItemPrivate::depth() const
+{
+    if (itemDepth == -1)
+        const_cast<QGraphicsItemPrivate *>(this)->resolveDepth();
+
+    return itemDepth;
+}
+
+/*!
+    \internal
+*/
+#ifndef QT_NO_GRAPHICSEFFECT
+void QGraphicsItemPrivate::invalidateParentGraphicsEffectsRecursively()
+{
+    QGraphicsItemPrivate *itemPrivate = this;
+    do {
+        if (itemPrivate->graphicsEffect) {
+            itemPrivate->notifyInvalidated = 1;
+
+            if (!itemPrivate->updateDueToGraphicsEffect)
+                static_cast<QGraphicsItemEffectSourcePrivate *>(itemPrivate->graphicsEffect->d_func()->source->d_func())->invalidateCache();
+        }
+    } while ((itemPrivate = itemPrivate->parent ? itemPrivate->parent->d_ptr.data() : 0));
+}
+
+void QGraphicsItemPrivate::invalidateChildGraphicsEffectsRecursively(QGraphicsItemPrivate::InvalidateReason reason)
+{
+    if (!mayHaveChildWithGraphicsEffect)
+        return;
+
+    for (int i = 0; i < children.size(); ++i) {
+        QGraphicsItemPrivate *childPrivate = children.at(i)->d_ptr.data();
+        if (reason == OpacityChanged && (childPrivate->flags & QGraphicsItem::ItemIgnoresParentOpacity))
+            continue;
+        if (childPrivate->graphicsEffect) {
+            childPrivate->notifyInvalidated = 1;
+            static_cast<QGraphicsItemEffectSourcePrivate *>(childPrivate->graphicsEffect->d_func()->source->d_func())->invalidateCache();
+        }
+
+        childPrivate->invalidateChildGraphicsEffectsRecursively(reason);
+    }
+}
+#endif //QT_NO_GRAPHICSEFFECT
+
+/*!
+    \internal
+*/
+void QGraphicsItemPrivate::invalidateDepthRecursively()
+{
+    if (itemDepth == -1)
+        return;
+
+    itemDepth = -1;
+    for (int i = 0; i < children.size(); ++i)
+        children.at(i)->d_ptr->invalidateDepthRecursively();
+}
+
+/*!
+    \internal
+
+    Resolves the stacking depth of this object and all its ancestors.
+*/
+void QGraphicsItemPrivate::resolveDepth()
+{
+    if (!parent)
+        itemDepth = 0;
+    else {
+        if (parent->d_ptr->itemDepth == -1)
+            parent->d_ptr->resolveDepth();
+        itemDepth = parent->d_ptr->itemDepth + 1;
+    }
+}
+
+/*!
+    \internal
+
+    ### This function is almost identical to
+    QGraphicsScenePrivate::registerTopLevelItem().
+*/
+void QGraphicsItemPrivate::addChild(QGraphicsItem *child)
+{
+    // Remove all holes from the sibling index list. Now the max index
+    // number is equal to the size of the children list.
+    ensureSequentialSiblingIndex();
+    needSortChildren = 1; // ### maybe 0
+    child->d_ptr->siblingIndex = children.size();
+    children.append(child);
+    if (isObject)
+        emit static_cast<QGraphicsObject *>(q_ptr)->childrenChanged();
+}
+
+/*!
+    \internal
+
+    ### This function is almost identical to
+    QGraphicsScenePrivate::unregisterTopLevelItem().
+*/
+void QGraphicsItemPrivate::removeChild(QGraphicsItem *child)
+{
+    // When removing elements in the middle of the children list,
+    // there will be a "gap" in the list of sibling indexes (0,1,3,4).
+    if (!holesInSiblingIndex)
+        holesInSiblingIndex = child->d_ptr->siblingIndex != children.size() - 1;
+    if (sequentialOrdering && !holesInSiblingIndex)
+        children.removeAt(child->d_ptr->siblingIndex);
+    else
+        children.removeOne(child);
+    // NB! Do not use children.removeAt(child->d_ptr->siblingIndex) because
+    // the child is not guaranteed to be at the index after the list is sorted.
+    // (see ensureSortedChildren()).
+    child->d_ptr->siblingIndex = -1;
+    if (isObject)
+        emit static_cast<QGraphicsObject *>(q_ptr)->childrenChanged();
+}
+
+/*!
+    \internal
+*/
+QGraphicsItemCache *QGraphicsItemPrivate::maybeExtraItemCache() const
+{
+    return (QGraphicsItemCache *)qvariant_cast<void *>(extra(ExtraCacheData));
+}
+
+/*!
+    \internal
+*/
+QGraphicsItemCache *QGraphicsItemPrivate::extraItemCache() const
+{
+    QGraphicsItemCache *c = (QGraphicsItemCache *)qvariant_cast<void *>(extra(ExtraCacheData));
+    if (!c) {
+        QGraphicsItemPrivate *that = const_cast<QGraphicsItemPrivate *>(this);
+        c = new QGraphicsItemCache;
+        that->setExtra(ExtraCacheData, QVariant::fromValue<void *>(c));
+    }
+    return c;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsItemPrivate::removeExtraItemCache()
+{
+    QGraphicsItemCache *c = (QGraphicsItemCache *)qvariant_cast<void *>(extra(ExtraCacheData));
+    if (c) {
+        c->purge();
+        delete c;
+    }
+    unsetExtra(ExtraCacheData);
+}
+
+void QGraphicsItemPrivate::updatePaintedViewBoundingRects(bool updateChildren)
+{
+    if (!scene)
+        return;
+
+    for (int i = 0; i < scene->d_func()->views.size(); ++i) {
+        QGraphicsViewPrivate *viewPrivate = scene->d_func()->views.at(i)->d_func();
+        QRect rect = paintedViewBoundingRects.value(viewPrivate->viewport);
+        rect.translate(viewPrivate->dirtyScrollOffset);
+        viewPrivate->updateRect(rect);
+    }
+
+    if (updateChildren) {
+        for (int i = 0; i < children.size(); ++i)
+            children.at(i)->d_ptr->updatePaintedViewBoundingRects(true);
+    }
+}
+
+// Traverses all the ancestors up to the top-level and updates the pointer to
+// always point to the top-most item that has a dirty scene transform.
+// It then backtracks to the top-most dirty item and start calculating the
+// scene transform by combining the item's transform (+pos) with the parent's
+// cached scene transform (which we at this point know for sure is valid).
+void QGraphicsItemPrivate::ensureSceneTransformRecursive(QGraphicsItem **topMostDirtyItem)
+{
+    Q_ASSERT(topMostDirtyItem);
+
+    if (dirtySceneTransform)
+        *topMostDirtyItem = q_ptr;
+
+    if (parent)
+        parent->d_ptr->ensureSceneTransformRecursive(topMostDirtyItem);
+
+    if (*topMostDirtyItem == q_ptr) {
+        if (!dirtySceneTransform)
+            return; // OK, neither my ancestors nor I have dirty scene transforms.
+        *topMostDirtyItem = 0;
+    } else if (*topMostDirtyItem) {
+        return; // Continue backtrack.
+    }
+
+    // This item and all its descendants have dirty scene transforms.
+    // We're about to validate this item's scene transform, so we have to
+    // invalidate all the children; otherwise there's no way for the descendants
+    // to detect that the ancestor has changed.
+    invalidateChildrenSceneTransform();
+
+    // COMBINE my transform with the parent's scene transform.
+    updateSceneTransformFromParent();
+    Q_ASSERT(!dirtySceneTransform);
+}
+
+/*!
+    \internal
+*/
+void QGraphicsItemPrivate::setSubFocus(QGraphicsItem *rootItem, QGraphicsItem *stopItem)
+{
+    // Update focus child chain. Stop at panels, or if this item
+    // is hidden, stop at the first item with a visible parent.
+    QGraphicsItem *parent = rootItem ? rootItem : q_ptr;
+    if (parent->panel() != q_ptr->panel())
+        return;
+
+    do {
+        // Clear any existing ancestor's subFocusItem.
+        if (parent != q_ptr && parent->d_ptr->subFocusItem) {
+            if (parent->d_ptr->subFocusItem == q_ptr)
+                break;
+            parent->d_ptr->subFocusItem->d_ptr->clearSubFocus(0, stopItem);
+        }
+        parent->d_ptr->subFocusItem = q_ptr;
+        parent->d_ptr->subFocusItemChange();
+    } while (!parent->isPanel() && (parent = parent->d_ptr->parent) && (visible || !parent->d_ptr->visible));
+
+    if (scene && !scene->isActive()) {
+        scene->d_func()->passiveFocusItem = subFocusItem;
+        scene->d_func()->lastFocusItem = subFocusItem;
+    }
+}
+
+/*!
+    \internal
+*/
+void QGraphicsItemPrivate::clearSubFocus(QGraphicsItem *rootItem, QGraphicsItem *stopItem)
+{
+    // Reset sub focus chain.
+    QGraphicsItem *parent = rootItem ? rootItem : q_ptr;
+    do {
+        if (parent->d_ptr->subFocusItem != q_ptr)
+            break;
+        parent->d_ptr->subFocusItem = 0;
+        if (parent != stopItem && !parent->isAncestorOf(stopItem))
+            parent->d_ptr->subFocusItemChange();
+    } while (!parent->isPanel() && (parent = parent->d_ptr->parent));
+}
+
+/*!
+    \internal
+
+    Sets the focusProxy pointer to 0 for all items that have this item as their
+    focusProxy. ### Qt 5: Use QPointer instead.
+*/
+void QGraphicsItemPrivate::resetFocusProxy()
+{
+    for (int i = 0; i < focusProxyRefs.size(); ++i)
+        *focusProxyRefs.at(i) = 0;
+    focusProxyRefs.clear();
+}
+
+/*!
+    \internal
+
+    Subclasses can reimplement this function to be notified when subFocusItem
+    changes.
+*/
+void QGraphicsItemPrivate::subFocusItemChange()
+{
+}
+
+/*!
+    \internal
+
+    Subclasses can reimplement this function to be notified when an item
+    becomes a focusScopeItem (or is no longer a focusScopeItem).
+*/
+void QGraphicsItemPrivate::focusScopeItemChange(bool isSubFocusItem)
+{
+    Q_UNUSED(isSubFocusItem);
+}
+
+/*!
+    \internal
+
+    Subclasses can reimplement this function to be notified when its
+    siblingIndex order is changed.
+*/
+void QGraphicsItemPrivate::siblingOrderChange()
+{
+}
+
+/*!
+    \internal
+
+    Tells us if it is a proxy widget
+*/
+bool QGraphicsItemPrivate::isProxyWidget() const
+{
+    return false;
+}
+
+/*!
+    Schedules a redraw of the area covered by \a rect in this item. You can
+    call this function whenever your item needs to be redrawn, such as if it
+    changes appearance or size.
+
+    This function does not cause an immediate paint; instead it schedules a
+    paint request that is processed by QGraphicsView after control reaches the
+    event loop. The item will only be redrawn if it is visible in any
+    associated view.
+
+    As a side effect of the item being repainted, other items that overlap the
+    area \a rect may also be repainted.
+
+    If the item is invisible (i.e., isVisible() returns false), this function
+    does nothing.
+
+    \sa paint(), boundingRect()
+*/
+void QGraphicsItem::update(const QRectF &rect)
+{
+    if (rect.isEmpty() && !rect.isNull())
+        return;
+
+    // Make sure we notify effects about invalidated source.
+#ifndef QT_NO_GRAPHICSEFFECT
+    d_ptr->invalidateParentGraphicsEffectsRecursively();
+#endif //QT_NO_GRAPHICSEFFECT
+
+    if (CacheMode(d_ptr->cacheMode) != NoCache) {
+        // Invalidate cache.
+        QGraphicsItemCache *cache = d_ptr->extraItemCache();
+        if (!cache->allExposed) {
+            if (rect.isNull()) {
+                cache->allExposed = true;
+                cache->exposed.clear();
+            } else {
+                cache->exposed.append(rect);
+            }
+        }
+        // Only invalidate cache; item is already dirty.
+        if (d_ptr->fullUpdatePending)
+            return;
+    }
+
+    if (d_ptr->scene)
+        d_ptr->scene->d_func()->markDirty(this, rect);
+}
+
+/*!
+    \since 4.4
+    Scrolls the contents of \a rect by \a dx, \a dy. If \a rect is a null rect
+    (the default), the item's bounding rect is scrolled.
+
+    Scrolling provides a fast alternative to simply redrawing when the
+    contents of the item (or parts of the item) are shifted vertically or
+    horizontally. Depending on the current transformation and the capabilities
+    of the paint device (i.e., the viewport), this operation may consist of
+    simply moving pixels from one location to another using memmove(). In most
+    cases this is faster than rerendering the entire area.
+
+    After scrolling, the item will issue an update for the newly exposed
+    areas. If scrolling is not supported (e.g., you are rendering to an OpenGL
+    viewport, which does not benefit from scroll optimizations), this function
+    is equivalent to calling update(\a rect).
+
+    \bold{Note:} Scrolling is only supported when QGraphicsItem::ItemCoordinateCache
+    is enabled; in all other cases calling this function is equivalent to calling
+    update(\a rect). If you for sure know that the item is opaque and not overlapped
+    by other items, you can map the \a rect to viewport coordinates and scroll the
+    viewport.
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 19
+
+    \sa boundingRect()
+*/
+void QGraphicsItem::scroll(qreal dx, qreal dy, const QRectF &rect)
+{
+    Q_D(QGraphicsItem);
+    if (dx == 0.0 && dy == 0.0)
+        return;
+    if (!d->scene)
+        return;
+
+    // Accelerated scrolling means moving pixels from one location to another
+    // and only redraw the newly exposed area. The following requirements must
+    // be fulfilled in order to do that:
+    //
+    // 1) Item is opaque.
+    // 2) Item is not overlapped by other items.
+    //
+    // There's (yet) no way to detect whether an item is opaque or not, which means
+    // we cannot do accelerated scrolling unless the cache is enabled. In case of using
+    // DeviceCoordinate cache we also have to take the device transform into account in
+    // order to determine whether we can do accelerated scrolling or not. That's left out
+    // for simplicity here, but it is definitely something we can consider in the future
+    // as a performance improvement.
+    if (d->cacheMode != QGraphicsItem::ItemCoordinateCache
+        || !qFuzzyIsNull(dx - int(dx)) || !qFuzzyIsNull(dy - int(dy))) {
+        update(rect);
+        return;
+    }
+
+    QGraphicsItemCache *cache = d->extraItemCache();
+    if (cache->allExposed || cache->fixedSize.isValid()) {
+        // Cache is either invalidated or item is scaled (see QGraphicsItem::setCacheMode).
+        update(rect);
+        return;
+    }
+
+    // Find pixmap in cache.
+    QPixmap cachedPixmap;
+    if (!QPixmapCache::find(cache->key, &cachedPixmap)) {
+        update(rect);
+        return;
+    }
+
+    QRect scrollRect = (rect.isNull() ? boundingRect() : rect).toAlignedRect();
+    if (!scrollRect.intersects(cache->boundingRect))
+        return; // Nothing to scroll.
+
+    // Remove from cache to avoid deep copy when modifying.
+    QPixmapCache::remove(cache->key);
+
+    QRegion exposed;
+    cachedPixmap.scroll(dx, dy, scrollRect.translated(-cache->boundingRect.topLeft()), &exposed);
+
+    // Reinsert into cache.
+    cache->key = QPixmapCache::insert(cachedPixmap);
+
+    // Translate the existing expose.
+    for (int i = 0; i < cache->exposed.size(); ++i) {
+        QRectF &e = cache->exposed[i];
+        if (!rect.isNull() && !e.intersects(rect))
+            continue;
+        e.translate(dx, dy);
+    }
+
+    // Append newly exposed areas. Note that the exposed region is currently
+    // in pixmap coordinates, so we have to translate it to item coordinates.
+    exposed.translate(cache->boundingRect.topLeft());
+    const QVector<QRect> exposedRects = exposed.rects();
+    for (int i = 0; i < exposedRects.size(); ++i)
+        cache->exposed += exposedRects.at(i);
+
+    // Trigger update. This will redraw the newly exposed area and make sure
+    // the pixmap is re-blitted in case there are overlapping items.
+    d->scene->d_func()->markDirty(this, rect);
+}
+
+/*!
+    \fn void QGraphicsItem::update(qreal x, qreal y, qreal width, qreal height)
+    \overload
+
+    This convenience function is equivalent to calling update(QRectF(\a x, \a
+    y, \a width, \a height)).
+*/
+
+/*!
+    Maps the point \a point, which is in this item's coordinate system, to \a
+    item's coordinate system, and returns the mapped coordinate.
+
+    If \a item is 0, this function returns the same as mapToScene().
+
+    \sa itemTransform(), mapToParent(), mapToScene(), transform(), mapFromItem(), {The Graphics
+    View Coordinate System}
+*/
+QPointF QGraphicsItem::mapToItem(const QGraphicsItem *item, const QPointF &point) const
+{
+    if (item)
+        return itemTransform(item).map(point);
+    return mapToScene(point);
+}
+
+/*!
+    \fn QPointF QGraphicsItem::mapToItem(const QGraphicsItem *item, qreal x, qreal y) const
+    \overload
+
+    This convenience function is equivalent to calling mapToItem(\a item,
+    QPointF(\a x, \a y)).
+*/
+
+/*!
+    Maps the point \a point, which is in this item's coordinate system, to its
+    parent's coordinate system, and returns the mapped coordinate. If the item
+    has no parent, \a point will be mapped to the scene's coordinate system.
+
+    \sa mapToItem(), mapToScene(), transform(), mapFromParent(), {The Graphics
+    View Coordinate System}
+*/
+QPointF QGraphicsItem::mapToParent(const QPointF &point) const
+{
+    // COMBINE
+    if (!d_ptr->transformData)
+        return point + d_ptr->pos;
+    return d_ptr->transformToParent().map(point);
+}
+
+/*!
+    \fn QPointF QGraphicsItem::mapToParent(qreal x, qreal y) const
+    \overload
+
+    This convenience function is equivalent to calling mapToParent(QPointF(\a
+    x, \a y)).
+*/
+
+/*!
+    Maps the point \a point, which is in this item's coordinate system, to the
+    scene's coordinate system, and returns the mapped coordinate.
+
+    \sa mapToItem(), mapToParent(), transform(), mapFromScene(), {The Graphics
+    View Coordinate System}
+*/
+QPointF QGraphicsItem::mapToScene(const QPointF &point) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return QPointF(point.x() + d_ptr->sceneTransform.dx(), point.y() + d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.map(point);
+}
+
+/*!
+    \fn QPointF QGraphicsItem::mapToScene(qreal x, qreal y) const
+    \overload
+
+    This convenience function is equivalent to calling mapToScene(QPointF(\a
+    x, \a y)).
+*/
+
+/*!
+    Maps the rectangle \a rect, which is in this item's coordinate system, to
+    \a item's coordinate system, and returns the mapped rectangle as a polygon.
+
+    If \a item is 0, this function returns the same as mapToScene().
+
+    \sa itemTransform(), mapToParent(), mapToScene(), mapFromItem(), {The
+    Graphics View Coordinate System}
+*/
+QPolygonF QGraphicsItem::mapToItem(const QGraphicsItem *item, const QRectF &rect) const
+{
+    if (item)
+        return itemTransform(item).map(rect);
+    return mapToScene(rect);
+}
+
+/*!
+    \fn QPolygonF QGraphicsItem::mapToItem(const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
+    \since 4.3
+
+    This convenience function is equivalent to calling mapToItem(item, QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    Maps the rectangle \a rect, which is in this item's coordinate system, to
+    its parent's coordinate system, and returns the mapped rectangle as a
+    polygon. If the item has no parent, \a rect will be mapped to the scene's
+    coordinate system.
+
+    \sa mapToScene(), mapToItem(), mapFromParent(), {The Graphics View
+    Coordinate System}
+*/
+QPolygonF QGraphicsItem::mapToParent(const QRectF &rect) const
+{
+    // COMBINE
+    if (!d_ptr->transformData)
+        return rect.translated(d_ptr->pos);
+    return d_ptr->transformToParent().map(rect);
+}
+
+/*!
+    \fn QPolygonF QGraphicsItem::mapToParent(qreal x, qreal y, qreal w, qreal h) const
+    \since 4.3
+
+    This convenience function is equivalent to calling mapToParent(QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    Maps the rectangle \a rect, which is in this item's coordinate system, to
+    the scene's coordinate system, and returns the mapped rectangle as a polygon.
+
+    \sa mapToParent(), mapToItem(), mapFromScene(), {The Graphics View
+    Coordinate System}
+*/
+QPolygonF QGraphicsItem::mapToScene(const QRectF &rect) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return rect.translated(d_ptr->sceneTransform.dx(), d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.map(rect);
+}
+
+/*!
+    \fn QPolygonF QGraphicsItem::mapToScene(qreal x, qreal y, qreal w, qreal h) const
+    \since 4.3
+
+    This convenience function is equivalent to calling mapToScene(QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    \since 4.5
+
+    Maps the rectangle \a rect, which is in this item's coordinate system, to
+    \a item's coordinate system, and returns the mapped rectangle as a new
+    rectangle (i.e., the bounding rectangle of the resulting polygon).
+
+    If \a item is 0, this function returns the same as mapRectToScene().
+
+    \sa itemTransform(), mapToParent(), mapToScene(), mapFromItem(), {The
+    Graphics View Coordinate System}
+*/
+QRectF QGraphicsItem::mapRectToItem(const QGraphicsItem *item, const QRectF &rect) const
+{
+    if (item)
+        return itemTransform(item).mapRect(rect);
+    return mapRectToScene(rect);
+}
+
+/*!
+    \fn QRectF QGraphicsItem::mapRectToItem(const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
+    \since 4.5
+
+    This convenience function is equivalent to calling mapRectToItem(item, QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    \since 4.5
+
+    Maps the rectangle \a rect, which is in this item's coordinate system, to
+    its parent's coordinate system, and returns the mapped rectangle as a new
+    rectangle (i.e., the bounding rectangle of the resulting polygon).
+
+    \sa itemTransform(), mapToParent(), mapToScene(), mapFromItem(), {The
+    Graphics View Coordinate System}
+*/
+QRectF QGraphicsItem::mapRectToParent(const QRectF &rect) const
+{
+    // COMBINE
+    if (!d_ptr->transformData)
+        return rect.translated(d_ptr->pos);
+    return d_ptr->transformToParent().mapRect(rect);
+}
+
+/*!
+    \fn QRectF QGraphicsItem::mapRectToParent(qreal x, qreal y, qreal w, qreal h) const
+    \since 4.5
+
+    This convenience function is equivalent to calling mapRectToParent(QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    \since 4.5
+
+    Maps the rectangle \a rect, which is in this item's coordinate system, to
+    the scene coordinate system, and returns the mapped rectangle as a new
+    rectangle (i.e., the bounding rectangle of the resulting polygon).
+
+    \sa itemTransform(), mapToParent(), mapToScene(), mapFromItem(), {The
+    Graphics View Coordinate System}
+*/
+QRectF QGraphicsItem::mapRectToScene(const QRectF &rect) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return rect.translated(d_ptr->sceneTransform.dx(), d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.mapRect(rect);
+}
+
+/*!
+    \fn QRectF QGraphicsItem::mapRectToScene(qreal x, qreal y, qreal w, qreal h) const
+    \since 4.5
+
+    This convenience function is equivalent to calling mapRectToScene(QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    \since 4.5
+
+    Maps the rectangle \a rect, which is in \a item's coordinate system, to
+    this item's coordinate system, and returns the mapped rectangle as a new
+    rectangle (i.e., the bounding rectangle of the resulting polygon).
+
+    If \a item is 0, this function returns the same as mapRectFromScene().
+
+    \sa itemTransform(), mapToParent(), mapToScene(), mapFromItem(), {The
+    Graphics View Coordinate System}
+*/
+QRectF QGraphicsItem::mapRectFromItem(const QGraphicsItem *item, const QRectF &rect) const
+{
+    if (item)
+        return item->itemTransform(this).mapRect(rect);
+    return mapRectFromScene(rect);
+}
+
+/*!
+    \fn QRectF QGraphicsItem::mapRectFromItem(const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
+    \since 4.5
+
+    This convenience function is equivalent to calling mapRectFromItem(item, QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    \since 4.5
+
+    Maps the rectangle \a rect, which is in this item's parent's coordinate
+    system, to this item's coordinate system, and returns the mapped rectangle
+    as a new rectangle (i.e., the bounding rectangle of the resulting
+    polygon).
+
+    \sa itemTransform(), mapToParent(), mapToScene(), mapFromItem(), {The
+    Graphics View Coordinate System}
+*/
+QRectF QGraphicsItem::mapRectFromParent(const QRectF &rect) const
+{
+    // COMBINE
+    if (!d_ptr->transformData)
+        return rect.translated(-d_ptr->pos);
+    return d_ptr->transformToParent().inverted().mapRect(rect);
+}
+
+/*!
+    \fn QRectF QGraphicsItem::mapRectFromParent(qreal x, qreal y, qreal w, qreal h) const
+    \since 4.5
+
+    This convenience function is equivalent to calling mapRectFromParent(QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    \since 4.5
+
+    Maps the rectangle \a rect, which is in scene coordinates, to this item's
+    coordinate system, and returns the mapped rectangle as a new rectangle
+    (i.e., the bounding rectangle of the resulting polygon).
+
+    \sa itemTransform(), mapToParent(), mapToScene(), mapFromItem(), {The
+    Graphics View Coordinate System}
+*/
+QRectF QGraphicsItem::mapRectFromScene(const QRectF &rect) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return rect.translated(-d_ptr->sceneTransform.dx(), -d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().mapRect(rect);
+}
+
+/*!
+    \fn QRectF QGraphicsItem::mapRectFromScene(qreal x, qreal y, qreal w, qreal h) const
+    \since 4.5
+
+    This convenience function is equivalent to calling mapRectFromScene(QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    Maps the polygon \a polygon, which is in this item's coordinate system, to
+    \a item's coordinate system, and returns the mapped polygon.
+
+    If \a item is 0, this function returns the same as mapToScene().
+
+    \sa itemTransform(), mapToParent(), mapToScene(), mapFromItem(), {The
+    Graphics View Coordinate System}
+*/
+QPolygonF QGraphicsItem::mapToItem(const QGraphicsItem *item, const QPolygonF &polygon) const
+{
+    if (item)
+        return itemTransform(item).map(polygon);
+    return mapToScene(polygon);
+}
+
+/*!
+    Maps the polygon \a polygon, which is in this item's coordinate system, to
+    its parent's coordinate system, and returns the mapped polygon. If the
+    item has no parent, \a polygon will be mapped to the scene's coordinate
+    system.
+
+    \sa mapToScene(), mapToItem(), mapFromParent(), {The Graphics View
+    Coordinate System}
+*/
+QPolygonF QGraphicsItem::mapToParent(const QPolygonF &polygon) const
+{
+    // COMBINE
+    if (!d_ptr->transformData)
+        return polygon.translated(d_ptr->pos);
+    return d_ptr->transformToParent().map(polygon);
+}
+
+/*!
+    Maps the polygon \a polygon, which is in this item's coordinate system, to
+    the scene's coordinate system, and returns the mapped polygon.
+
+    \sa mapToParent(), mapToItem(), mapFromScene(), {The Graphics View
+    Coordinate System}
+*/
+QPolygonF QGraphicsItem::mapToScene(const QPolygonF &polygon) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return polygon.translated(d_ptr->sceneTransform.dx(), d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.map(polygon);
+}
+
+/*!
+    Maps the path \a path, which is in this item's coordinate system, to
+    \a item's coordinate system, and returns the mapped path.
+
+    If \a item is 0, this function returns the same as mapToScene().
+
+    \sa itemTransform(), mapToParent(), mapToScene(), mapFromItem(), {The
+    Graphics View Coordinate System}
+*/
+QPainterPath QGraphicsItem::mapToItem(const QGraphicsItem *item, const QPainterPath &path) const
+{
+    if (item)
+        return itemTransform(item).map(path);
+    return mapToScene(path);
+}
+
+/*!
+    Maps the path \a path, which is in this item's coordinate system, to
+    its parent's coordinate system, and returns the mapped path. If the
+    item has no parent, \a path will be mapped to the scene's coordinate
+    system.
+
+    \sa mapToScene(), mapToItem(), mapFromParent(), {The Graphics View
+    Coordinate System}
+*/
+QPainterPath QGraphicsItem::mapToParent(const QPainterPath &path) const
+{
+    // COMBINE
+    if (!d_ptr->transformData)
+        return path.translated(d_ptr->pos);
+    return d_ptr->transformToParent().map(path);
+}
+
+/*!
+    Maps the path \a path, which is in this item's coordinate system, to
+    the scene's coordinate system, and returns the mapped path.
+
+    \sa mapToParent(), mapToItem(), mapFromScene(), {The Graphics View
+    Coordinate System}
+*/
+QPainterPath QGraphicsItem::mapToScene(const QPainterPath &path) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return path.translated(d_ptr->sceneTransform.dx(), d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.map(path);
+}
+
+/*!
+    Maps the point \a point, which is in \a item's coordinate system, to this
+    item's coordinate system, and returns the mapped coordinate.
+
+    If \a item is 0, this function returns the same as mapFromScene().
+
+    \sa itemTransform(), mapFromParent(), mapFromScene(), transform(), mapToItem(), {The Graphics
+    View Coordinate System}
+*/
+QPointF QGraphicsItem::mapFromItem(const QGraphicsItem *item, const QPointF &point) const
+{
+    if (item)
+        return item->itemTransform(this).map(point);
+    return mapFromScene(point);
+}
+
+/*!
+    \fn QPointF QGraphicsItem::mapFromItem(const QGraphicsItem *item, qreal x, qreal y) const
+    \overload
+
+    This convenience function is equivalent to calling mapFromItem(\a item,
+    QPointF(\a x, \a y)).
+*/
+
+/*!
+    Maps the point \a point, which is in this item's parent's coordinate
+    system, to this item's coordinate system, and returns the mapped
+    coordinate.
+
+    \sa mapFromItem(), mapFromScene(), transform(), mapToParent(), {The Graphics
+    View Coordinate System}
+*/
+QPointF QGraphicsItem::mapFromParent(const QPointF &point) const
+{
+    // COMBINE
+    if (d_ptr->transformData)
+        return d_ptr->transformToParent().inverted().map(point);
+    return point - d_ptr->pos;
+}
+
+/*!
+    \fn QPointF QGraphicsItem::mapFromParent(qreal x, qreal y) const
+    \overload
+
+    This convenience function is equivalent to calling
+    mapFromParent(QPointF(\a x, \a y)).
+*/
+
+/*!
+    Maps the point \a point, which is in this item's scene's coordinate
+    system, to this item's coordinate system, and returns the mapped
+    coordinate.
+
+    \sa mapFromItem(), mapFromParent(), transform(), mapToScene(), {The Graphics
+    View Coordinate System}
+*/
+QPointF QGraphicsItem::mapFromScene(const QPointF &point) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return QPointF(point.x() - d_ptr->sceneTransform.dx(), point.y() - d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().map(point);
+}
+
+/*!
+    \fn QPointF QGraphicsItem::mapFromScene(qreal x, qreal y) const
+    \overload
+
+    This convenience function is equivalent to calling mapFromScene(QPointF(\a
+    x, \a y)).
+*/
+
+/*!
+    Maps the rectangle \a rect, which is in \a item's coordinate system, to
+    this item's coordinate system, and returns the mapped rectangle as a
+    polygon.
+
+    If \a item is 0, this function returns the same as mapFromScene()
+
+    \sa itemTransform(), mapToItem(), mapFromParent(), transform(), {The Graphics View Coordinate
+    System}
+*/
+QPolygonF QGraphicsItem::mapFromItem(const QGraphicsItem *item, const QRectF &rect) const
+{
+    if (item)
+        return item->itemTransform(this).map(rect);
+    return mapFromScene(rect);
+}
+
+/*!
+    \fn QPolygonF QGraphicsItem::mapFromItem(const QGraphicsItem *item, qreal x, qreal y, qreal w, qreal h) const
+    \since 4.3
+
+    This convenience function is equivalent to calling mapFromItem(item, QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    Maps the rectangle \a rect, which is in this item's parent's coordinate
+    system, to this item's coordinate system, and returns the mapped rectangle
+    as a polygon.
+
+    \sa mapToParent(), mapFromItem(), transform(), {The Graphics View Coordinate
+    System}
+*/
+QPolygonF QGraphicsItem::mapFromParent(const QRectF &rect) const
+{
+    // COMBINE
+    if (!d_ptr->transformData)
+        return rect.translated(-d_ptr->pos);
+    return d_ptr->transformToParent().inverted().map(rect);
+}
+
+/*!
+    \fn QPolygonF QGraphicsItem::mapFromParent(qreal x, qreal y, qreal w, qreal h) const
+    \since 4.3
+
+    This convenience function is equivalent to calling mapFromItem(QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    Maps the rectangle \a rect, which is in this item's scene's coordinate
+    system, to this item's coordinate system, and returns the mapped rectangle
+    as a polygon.
+
+    \sa mapToScene(), mapFromItem(), transform(), {The Graphics View Coordinate
+    System}
+*/
+QPolygonF QGraphicsItem::mapFromScene(const QRectF &rect) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return rect.translated(-d_ptr->sceneTransform.dx(), -d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().map(rect);
+}
+
+/*!
+    \fn QPolygonF QGraphicsItem::mapFromScene(qreal x, qreal y, qreal w, qreal h) const
+    \since 4.3
+
+    This convenience function is equivalent to calling mapFromScene(QRectF(\a x, \a y, \a w, \a h)).
+*/
+
+/*!
+    Maps the polygon \a polygon, which is in \a item's coordinate system, to
+    this item's coordinate system, and returns the mapped polygon.
+
+    If \a item is 0, this function returns the same as mapFromScene().
+
+    \sa itemTransform(), mapToItem(), mapFromParent(), transform(), {The
+    Graphics View Coordinate System}
+*/
+QPolygonF QGraphicsItem::mapFromItem(const QGraphicsItem *item, const QPolygonF &polygon) const
+{
+    if (item)
+        return item->itemTransform(this).map(polygon);
+    return mapFromScene(polygon);
+}
+
+/*!
+    Maps the polygon \a polygon, which is in this item's parent's coordinate
+    system, to this item's coordinate system, and returns the mapped polygon.
+
+    \sa mapToParent(), mapToItem(), transform(), {The Graphics View Coordinate
+    System}
+*/
+QPolygonF QGraphicsItem::mapFromParent(const QPolygonF &polygon) const
+{
+    // COMBINE
+    if (!d_ptr->transformData)
+        return polygon.translated(-d_ptr->pos);
+    return d_ptr->transformToParent().inverted().map(polygon);
+}
+
+/*!
+    Maps the polygon \a polygon, which is in this item's scene's coordinate
+    system, to this item's coordinate system, and returns the mapped polygon.
+
+    \sa mapToScene(), mapFromParent(), transform(), {The Graphics View Coordinate
+    System}
+*/
+QPolygonF QGraphicsItem::mapFromScene(const QPolygonF &polygon) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return polygon.translated(-d_ptr->sceneTransform.dx(), -d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().map(polygon);
+}
+
+/*!
+    Maps the path \a path, which is in \a item's coordinate system, to
+    this item's coordinate system, and returns the mapped path.
+
+    If \a item is 0, this function returns the same as mapFromScene().
+
+    \sa itemTransform(), mapFromParent(), mapFromScene(), mapToItem(), {The
+    Graphics View Coordinate System}
+*/
+QPainterPath QGraphicsItem::mapFromItem(const QGraphicsItem *item, const QPainterPath &path) const
+{
+    if (item)
+        return item->itemTransform(this).map(path);
+    return mapFromScene(path);
+}
+
+/*!
+    Maps the path \a path, which is in this item's parent's coordinate
+    system, to this item's coordinate system, and returns the mapped path.
+
+    \sa mapFromScene(), mapFromItem(), mapToParent(), {The Graphics View
+    Coordinate System}
+*/
+QPainterPath QGraphicsItem::mapFromParent(const QPainterPath &path) const
+{
+    // COMBINE
+    if (!d_ptr->transformData)
+            return path.translated(-d_ptr->pos);
+    return d_ptr->transformToParent().inverted().map(path);
+}
+
+/*!
+    Maps the path \a path, which is in this item's scene's coordinate
+    system, to this item's coordinate system, and returns the mapped path.
+
+    \sa mapFromParent(), mapFromItem(), mapToScene(), {The Graphics View
+    Coordinate System}
+*/
+QPainterPath QGraphicsItem::mapFromScene(const QPainterPath &path) const
+{
+    if (d_ptr->hasTranslateOnlySceneTransform())
+        return path.translated(-d_ptr->sceneTransform.dx(), -d_ptr->sceneTransform.dy());
+    return d_ptr->sceneTransform.inverted().map(path);
+}
+
+/*!
+    Returns true if this item is an ancestor of \a child (i.e., if this item
+    is \a child's parent, or one of \a child's parent's ancestors).
+
+    \sa parentItem()
+*/
+bool QGraphicsItem::isAncestorOf(const QGraphicsItem *child) const
+{
+    if (!child || child == this)
+        return false;
+    if (child->d_ptr->depth() < d_ptr->depth())
+        return false;
+    const QGraphicsItem *ancestor = child;
+    while ((ancestor = ancestor->d_ptr->parent)) {
+        if (ancestor == this)
+            return true;
+    }
+    return false;
+}
+
+/*!
+    \since 4.4
+
+    Returns the closest common ancestor item of this item and \a other, or 0
+    if either \a other is 0, or there is no common ancestor.
+
+    \sa isAncestorOf()
+*/
+QGraphicsItem *QGraphicsItem::commonAncestorItem(const QGraphicsItem *other) const
+{
+    if (!other)
+        return 0;
+    if (other == this)
+        return const_cast<QGraphicsItem *>(this);
+    const QGraphicsItem *thisw = this;
+    const QGraphicsItem *otherw = other;
+    int thisDepth = d_ptr->depth();
+    int otherDepth = other->d_ptr->depth();
+    while (thisDepth > otherDepth) {
+        thisw = thisw->d_ptr->parent;
+        --thisDepth;
+    }
+    while (otherDepth > thisDepth) {
+        otherw = otherw->d_ptr->parent;
+        --otherDepth;
+    }
+    while (thisw && thisw != otherw) {
+        thisw = thisw->d_ptr->parent;
+        otherw = otherw->d_ptr->parent;
+    }
+    return const_cast<QGraphicsItem *>(thisw);
+}
+
+/*!
+    \since 4,4
+    Returns true if this item is currently under the mouse cursor in one of
+    the views; otherwise, false is returned.
+
+    \sa QGraphicsScene::views(), QCursor::pos()
+*/
+bool QGraphicsItem::isUnderMouse() const
+{
+    Q_D(const QGraphicsItem);
+    if (!d->scene)
+        return false;
+
+    QPoint cursorPos = QCursor::pos();
+    foreach (QGraphicsView *view, d->scene->views()) {
+        if (contains(mapFromScene(view->mapToScene(view->mapFromGlobal(cursorPos)))))
+            return true;
+    }
+    return false;
+}
+
+/*!
+    Returns this item's custom data for the key \a key as a QVariant.
+
+    Custom item data is useful for storing arbitrary properties in any
+    item. Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 11
+
+    Qt does not use this feature for storing data; it is provided solely
+    for the convenience of the user.
+
+    \sa setData()
+*/
+QVariant QGraphicsItem::data(int key) const
+{
+    QGraphicsItemCustomDataStore *store = qt_dataStore();
+    if (!store->data.contains(this))
+        return QVariant();
+    return store->data.value(this).value(key);
+}
+
+/*!
+    Sets this item's custom data for the key \a key to \a value.
+
+    Custom item data is useful for storing arbitrary properties for any
+    item. Qt does not use this feature for storing data; it is provided solely
+    for the convenience of the user.
+
+    \sa data()
+*/
+void QGraphicsItem::setData(int key, const QVariant &value)
+{
+    qt_dataStore()->data[this][key] = value;
+}
+
+/*!
+    \fn T qgraphicsitem_cast(QGraphicsItem *item)
+    \relates QGraphicsItem
+    \since 4.2
+
+    Returns the given \a item cast to type T if \a item is of type T;
+    otherwise, 0 is returned.
+
+    \note To make this function work correctly with custom items, reimplement
+    the \l{QGraphicsItem::}{type()} function for each custom QGraphicsItem
+    subclass.
+
+    \sa QGraphicsItem::type(), QGraphicsItem::UserType
+*/
+
+/*!
+    Returns the type of an item as an int. All standard graphicsitem classes
+    are associated with a unique value; see QGraphicsItem::Type. This type
+    information is used by qgraphicsitem_cast() to distinguish between types.
+
+    The default implementation (in QGraphicsItem) returns UserType.
+
+    To enable use of qgraphicsitem_cast() with a custom item, reimplement this
+    function and declare a Type enum value equal to your custom item's type.
+    Custom items must return a value larger than or equal to UserType (65536).
+
+    For example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp QGraphicsItem type
+
+    \sa UserType
+*/
+int QGraphicsItem::type() const
+{
+    return (int)UserType;
+}
+
+/*!
+    Installs an event filter for this item on \a filterItem, causing
+    all events for this item to first pass through \a filterItem's
+    sceneEventFilter() function.
+
+    To filter another item's events, install this item as an event filter
+    for the other item. Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 12
+
+    An item can only filter events for other items in the same
+    scene. Also, an item cannot filter its own events; instead, you
+    can reimplement sceneEvent() directly.
+
+    Items must belong to a scene for scene event filters to be installed and
+    used.
+
+    \sa removeSceneEventFilter(), sceneEventFilter(), sceneEvent()
+*/
+void QGraphicsItem::installSceneEventFilter(QGraphicsItem *filterItem)
+{
+    if (!d_ptr->scene) {
+        qWarning("QGraphicsItem::installSceneEventFilter: event filters can only be installed"
+                 " on items in a scene.");
+        return;
+    }
+    if (d_ptr->scene != filterItem->scene()) {
+        qWarning("QGraphicsItem::installSceneEventFilter: event filters can only be installed"
+                 " on items in the same scene.");
+        return;
+    }
+    d_ptr->scene->d_func()->installSceneEventFilter(this, filterItem);
+}
+
+/*!
+    Removes an event filter on this item from \a filterItem.
+
+    \sa installSceneEventFilter()
+*/
+void QGraphicsItem::removeSceneEventFilter(QGraphicsItem *filterItem)
+{
+    if (!d_ptr->scene || d_ptr->scene != filterItem->scene())
+        return;
+    d_ptr->scene->d_func()->removeSceneEventFilter(this, filterItem);
+}
+
+/*!
+    Filters events for the item \a watched. \a event is the filtered
+    event.
+
+    Reimplementing this function in a subclass makes it possible
+    for the item to be used as an event filter for other items,
+    intercepting all the events send to those items before they are
+    able to respond.
+
+    Reimplementations must return true to prevent further processing of
+    a given event, ensuring that it will not be delivered to the watched
+    item, or return false to indicate that the event should be propagated
+    further by the event system.
+
+    \sa installSceneEventFilter()
+*/
+bool QGraphicsItem::sceneEventFilter(QGraphicsItem *watched, QEvent *event)
+{
+    Q_UNUSED(watched);
+    Q_UNUSED(event);
+    return false;
+}
+
+/*!
+    This virtual function receives events to this item. Reimplement
+    this function to intercept events before they are dispatched to
+    the specialized event handlers contextMenuEvent(), focusInEvent(),
+    focusOutEvent(), hoverEnterEvent(), hoverMoveEvent(),
+    hoverLeaveEvent(), keyPressEvent(), keyReleaseEvent(),
+    mousePressEvent(), mouseReleaseEvent(), mouseMoveEvent(), and
+    mouseDoubleClickEvent().
+
+    Returns true if the event was recognized and handled; otherwise, (e.g., if
+    the event type was not recognized,) false is returned.
+
+    \a event is the intercepted event.
+*/
+bool QGraphicsItem::sceneEvent(QEvent *event)
+{
+    if (d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorHandlesChildEvents) {
+        if (event->type() == QEvent::HoverEnter || event->type() == QEvent::HoverLeave
+            || event->type() == QEvent::DragEnter || event->type() == QEvent::DragLeave) {
+            // Hover enter and hover leave events for children are ignored;
+            // hover move events are forwarded.
+            return true;
+        }
+
+        QGraphicsItem *handler = this;
+        do {
+            handler = handler->d_ptr->parent;
+            Q_ASSERT(handler);
+        } while (handler->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorHandlesChildEvents);
+        // Forward the event to the closest parent that handles child
+        // events, mapping existing item-local coordinates to its
+        // coordinate system.
+        d_ptr->remapItemPos(event, handler);
+        handler->sceneEvent(event);
+        return true;
+    }
+
+    if (event->type() == QEvent::FocusOut) {
+        focusOutEvent(static_cast<QFocusEvent *>(event));
+        return true;
+    }
+
+    if (!d_ptr->visible) {
+        // Eaten
+        return true;
+    }
+
+    switch (event->type()) {
+    case QEvent::FocusIn:
+        focusInEvent(static_cast<QFocusEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneContextMenu:
+        contextMenuEvent(static_cast<QGraphicsSceneContextMenuEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneDragEnter:
+        dragEnterEvent(static_cast<QGraphicsSceneDragDropEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneDragMove:
+        dragMoveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneDragLeave:
+        dragLeaveEvent(static_cast<QGraphicsSceneDragDropEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneDrop:
+        dropEvent(static_cast<QGraphicsSceneDragDropEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneHoverEnter:
+        hoverEnterEvent(static_cast<QGraphicsSceneHoverEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneHoverMove:
+        hoverMoveEvent(static_cast<QGraphicsSceneHoverEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneHoverLeave:
+        hoverLeaveEvent(static_cast<QGraphicsSceneHoverEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneMouseMove:
+        mouseMoveEvent(static_cast<QGraphicsSceneMouseEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneMousePress:
+        mousePressEvent(static_cast<QGraphicsSceneMouseEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneMouseRelease:
+        mouseReleaseEvent(static_cast<QGraphicsSceneMouseEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneMouseDoubleClick:
+        mouseDoubleClickEvent(static_cast<QGraphicsSceneMouseEvent *>(event));
+        break;
+    case QEvent::GraphicsSceneWheel:
+        wheelEvent(static_cast<QGraphicsSceneWheelEvent *>(event));
+        break;
+    case QEvent::KeyPress: {
+        QKeyEvent *k = static_cast<QKeyEvent *>(event);
+        if (k->key() == Qt::Key_Tab || k->key() == Qt::Key_Backtab) {
+            if (!(k->modifiers() & (Qt::ControlModifier | Qt::AltModifier))) {  //### Add MetaModifier?
+                bool res = false;
+                if (k->key() == Qt::Key_Backtab
+                    || (k->key() == Qt::Key_Tab && (k->modifiers() & Qt::ShiftModifier))) {
+                    if (d_ptr->isWidget) {
+                        res = static_cast<QGraphicsWidget *>(this)->focusNextPrevChild(false);
+                    } else if (d_ptr->scene) {
+                        res = d_ptr->scene->focusNextPrevChild(false);
+                    }
+                } else if (k->key() == Qt::Key_Tab) {
+                    if (d_ptr->isWidget) {
+                        res = static_cast<QGraphicsWidget *>(this)->focusNextPrevChild(true);
+                    } else if (d_ptr->scene) {
+                        res = d_ptr->scene->focusNextPrevChild(true);
+                    }
+                }
+                if (!res)
+                    event->ignore();
+                return true;
+            }
+        }
+        keyPressEvent(static_cast<QKeyEvent *>(event));
+        break;
+    }
+    case QEvent::KeyRelease:
+        keyReleaseEvent(static_cast<QKeyEvent *>(event));
+        break;
+    case QEvent::InputMethod:
+        inputMethodEvent(static_cast<QInputMethodEvent *>(event));
+        break;
+    case QEvent::WindowActivate:
+    case QEvent::WindowDeactivate:
+        // Propagate panel activation.
+        if (d_ptr->scene) {
+            for (int i = 0; i < d_ptr->children.size(); ++i) {
+                QGraphicsItem *child = d_ptr->children.at(i);
+                if (child->isVisible() && !child->isPanel()) {
+                    if (!(child->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorHandlesChildEvents))
+                        d_ptr->scene->sendEvent(child, event);
+                }
+            }
+        }
+        break;
+    default:
+        return false;
+    }
+
+    return true;
+}
+
+/*!
+    This event handler can be reimplemented in a subclass to process context
+    menu events. The \a event parameter contains details about the event to
+    be handled.
+
+    If you ignore the event, (i.e., by calling QEvent::ignore(),) \a event
+    will propagate to any item beneath this item. If no items accept the
+    event, it will be ignored by the scene, and propagate to the view.
+
+    It's common to open a QMenu in response to receiving a context menu
+    event. Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 13
+
+    The default implementation ignores the event.
+
+    \sa sceneEvent()
+*/
+void QGraphicsItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
+{
+    event->ignore();
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    drag enter events for this item. Drag enter events are generated as the
+    cursor enters the item's area.
+
+    By accepting the event, (i.e., by calling QEvent::accept(),) the item will
+    accept drop events, in addition to receiving drag move and drag
+    leave. Otherwise, the event will be ignored and propagate to the item
+    beneath. If the event is accepted, the item will receive a drag move event
+    before control goes back to the event loop.
+
+    A common implementation of dragEnterEvent accepts or ignores \a event
+    depending on the associated mime data in \a event. Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 14
+
+    Items do not receive drag and drop events by default; to enable this
+    feature, call \c setAcceptDrops(true).
+
+    The default implementation does nothing.
+
+    \sa dropEvent(), dragMoveEvent(), dragLeaveEvent()
+*/
+void QGraphicsItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
+{
+    Q_D(QGraphicsItem);
+    // binary compatibility workaround between 4.4 and 4.5
+    if (d->isProxyWidget())
+        static_cast<QGraphicsProxyWidget*>(this)->dragEnterEvent(event);
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    drag leave events for this item. Drag leave events are generated as the
+    cursor leaves the item's area. Most often you will not need to reimplement
+    this function, but it can be useful for resetting state in your item
+    (e.g., highlighting).
+
+    Calling QEvent::ignore() or QEvent::accept() on \a event has no effect.
+
+    Items do not receive drag and drop events by default; to enable this
+    feature, call \c setAcceptDrops(true).
+
+    The default implementation does nothing.
+
+    \sa dragEnterEvent(), dropEvent(), dragMoveEvent()
+*/
+void QGraphicsItem::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
+{
+    Q_D(QGraphicsItem);
+    // binary compatibility workaround between 4.4 and 4.5
+    if (d->isProxyWidget())
+        static_cast<QGraphicsProxyWidget*>(this)->dragLeaveEvent(event);
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    drag move events for this item. Drag move events are generated as the
+    cursor moves around inside the item's area. Most often you will not need
+    to reimplement this function; it is used to indicate that only parts of
+    the item can accept drops.
+
+    Calling QEvent::ignore() or QEvent::accept() on \a event toggles whether
+    or not the item will accept drops at the position from the event. By
+    default, \a event is accepted, indicating that the item allows drops at
+    the specified position.
+
+    Items do not receive drag and drop events by default; to enable this
+    feature, call \c setAcceptDrops(true).
+
+    The default implementation does nothing.
+
+    \sa dropEvent(), dragEnterEvent(), dragLeaveEvent()
+*/
+void QGraphicsItem::dragMoveEvent(QGraphicsSceneDragDropEvent *event)
+{
+    Q_D(QGraphicsItem);
+    // binary compatibility workaround between 4.4 and 4.5
+    if (d->isProxyWidget())
+        static_cast<QGraphicsProxyWidget*>(this)->dragMoveEvent(event);
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    drop events for this item. Items can only receive drop events if the last
+    drag move event was accepted.
+
+    Calling QEvent::ignore() or QEvent::accept() on \a event has no effect.
+
+    Items do not receive drag and drop events by default; to enable this
+    feature, call \c setAcceptDrops(true).
+
+    The default implementation does nothing.
+
+    \sa dragEnterEvent(), dragMoveEvent(), dragLeaveEvent()
+*/
+void QGraphicsItem::dropEvent(QGraphicsSceneDragDropEvent *event)
+{
+    Q_D(QGraphicsItem);
+    // binary compatibility workaround between 4.4 and 4.5
+    if (d->isProxyWidget())
+        static_cast<QGraphicsProxyWidget*>(this)->dropEvent(event);
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    focus in events for this item. The default implementation calls
+    ensureVisible().
+
+    \sa focusOutEvent(), sceneEvent(), setFocus()
+*/
+void QGraphicsItem::focusInEvent(QFocusEvent *event)
+{
+    Q_UNUSED(event);
+    update();
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    focus out events for this item. The default implementation does nothing.
+
+    \sa focusInEvent(), sceneEvent(), setFocus()
+*/
+void QGraphicsItem::focusOutEvent(QFocusEvent *event)
+{
+    Q_UNUSED(event);
+    update();
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    hover enter events for this item. The default implementation calls
+    update(); otherwise it does nothing.
+
+    Calling QEvent::ignore() or QEvent::accept() on \a event has no effect.
+
+    \sa hoverMoveEvent(), hoverLeaveEvent(), sceneEvent(), setAcceptHoverEvents()
+*/
+void QGraphicsItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
+{
+    Q_UNUSED(event);
+    update();
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    hover move events for this item. The default implementation does nothing.
+
+    Calling QEvent::ignore() or QEvent::accept() on \a event has no effect.
+
+    \sa hoverEnterEvent(), hoverLeaveEvent(), sceneEvent(), setAcceptHoverEvents()
+*/
+void QGraphicsItem::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
+{
+    Q_UNUSED(event);
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    hover leave events for this item. The default implementation calls
+    update(); otherwise it does nothing.
+
+    Calling QEvent::ignore() or QEvent::accept() on \a event has no effect.
+
+    \sa hoverEnterEvent(), hoverMoveEvent(), sceneEvent(), setAcceptHoverEvents()
+*/
+void QGraphicsItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
+{
+    Q_UNUSED(event);
+    update();
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to
+    receive key press events for this item. The default implementation
+    ignores the event. If you reimplement this handler, the event will by
+    default be accepted.
+
+    Note that key events are only received for items that set the
+    ItemIsFocusable flag, and that have keyboard input focus.
+
+    \sa keyReleaseEvent(), setFocus(), QGraphicsScene::setFocusItem(),
+    sceneEvent()
+*/
+void QGraphicsItem::keyPressEvent(QKeyEvent *event)
+{
+    event->ignore();
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    key release events for this item. The default implementation
+    ignores the event. If you reimplement this handler, the event will by
+    default be accepted.
+
+    Note that key events are only received for items that set the
+    ItemIsFocusable flag, and that have keyboard input focus.
+
+    \sa keyPressEvent(), setFocus(), QGraphicsScene::setFocusItem(),
+    sceneEvent()
+*/
+void QGraphicsItem::keyReleaseEvent(QKeyEvent *event)
+{
+    event->ignore();
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to
+    receive mouse press events for this item. Mouse press events are
+    only delivered to items that accept the mouse button that is
+    pressed. By default, an item accepts all mouse buttons, but you
+    can change this by calling setAcceptedMouseButtons().
+
+    The mouse press event decides which item should become the mouse
+    grabber (see QGraphicsScene::mouseGrabberItem()). If you do not
+    reimplement this function, the press event will propagate to any
+    topmost item beneath this item, and no other mouse events will be
+    delivered to this item.
+
+    If you do reimplement this function, \a event will by default be
+    accepted (see QEvent::accept()), and this item is then the mouse
+    grabber. This allows the item to receive future move, release and
+    doubleclick events. If you call QEvent::ignore() on \a event, this
+    item will lose the mouse grab, and \a event will propagate to any
+    topmost item beneath. No further mouse events will be delivered to
+    this item unless a new mouse press event is received.
+
+    The default implementation handles basic item interaction, such as
+    selection and moving. If you want to keep the base implementation
+    when reimplementing this function, call
+    QGraphicsItem::mousePressEvent() in your reimplementation.
+
+    The event is \l{QEvent::ignore()}d for items that are neither
+    \l{QGraphicsItem::ItemIsMovable}{movable} nor
+    \l{QGraphicsItem::ItemIsSelectable}{selectable}.
+
+    \sa mouseMoveEvent(), mouseReleaseEvent(),
+    mouseDoubleClickEvent(), sceneEvent()
+*/
+void QGraphicsItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton && (flags() & ItemIsSelectable)) {
+        bool multiSelect = (event->modifiers() & Qt::ControlModifier) != 0;
+        if (!multiSelect) {
+            if (!d_ptr->selected) {
+                if (QGraphicsScene *scene = d_ptr->scene) {
+                    ++scene->d_func()->selectionChanging;
+                    scene->clearSelection();
+                    --scene->d_func()->selectionChanging;
+                }
+                setSelected(true);
+            }
+        }
+    } else if (!(flags() & ItemIsMovable)) {
+        event->ignore();
+    }
+    if (d_ptr->isWidget) {
+        // Qt::Popup closes when you click outside.
+        QGraphicsWidget *w = static_cast<QGraphicsWidget *>(this);
+        if ((w->windowFlags() & Qt::Popup) == Qt::Popup) {
+            event->accept();
+            if (!w->rect().contains(event->pos()))
+                w->close();
+        }
+    }
+}
+
+/*!
+    obsolete
+*/
+bool _qt_movableAncestorIsSelected(const QGraphicsItem *item)
+{
+    const QGraphicsItem *parent = item->parentItem();
+    return parent && (((parent->flags() & QGraphicsItem::ItemIsMovable) && parent->isSelected()) || _qt_movableAncestorIsSelected(parent));
+}
+
+bool QGraphicsItemPrivate::movableAncestorIsSelected(const QGraphicsItem *item)
+{
+    const QGraphicsItem *parent = item->d_ptr->parent;
+    return parent && (((parent->flags() & QGraphicsItem::ItemIsMovable) && parent->isSelected()) || _qt_movableAncestorIsSelected(parent));
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to
+    receive mouse move events for this item. If you do receive this
+    event, you can be certain that this item also received a mouse
+    press event, and that this item is the current mouse grabber.
+
+    Calling QEvent::ignore() or QEvent::accept() on \a event has no
+    effect.
+
+    The default implementation handles basic item interaction, such as
+    selection and moving. If you want to keep the base implementation
+    when reimplementing this function, call
+    QGraphicsItem::mouseMoveEvent() in your reimplementation.
+
+    Please note that mousePressEvent() decides which graphics item it
+    is that receives mouse events. See the mousePressEvent()
+    description for details.
+
+    \sa mousePressEvent(), mouseReleaseEvent(),
+    mouseDoubleClickEvent(), sceneEvent()
+*/
+void QGraphicsItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if ((event->buttons() & Qt::LeftButton) && (flags() & ItemIsMovable)) {
+        // Determine the list of items that need to be moved.
+        QList<QGraphicsItem *> selectedItems;
+        QMap<QGraphicsItem *, QPointF> initialPositions;
+        if (d_ptr->scene) {
+            selectedItems = d_ptr->scene->selectedItems();
+            initialPositions = d_ptr->scene->d_func()->movingItemsInitialPositions;
+            if (initialPositions.isEmpty()) {
+                foreach (QGraphicsItem *item, selectedItems)
+                    initialPositions[item] = item->pos();
+                initialPositions[this] = pos();
+            }
+            d_ptr->scene->d_func()->movingItemsInitialPositions = initialPositions;
+        }
+
+        // Find the active view.
+        QGraphicsView *view = 0;
+        if (event->widget())
+            view = qobject_cast<QGraphicsView *>(event->widget()->parentWidget());
+
+        // Move all selected items
+        int i = 0;
+        bool movedMe = false;
+        while (i <= selectedItems.size()) {
+            QGraphicsItem *item = 0;
+            if (i < selectedItems.size())
+                item = selectedItems.at(i);
+            else
+                item = this;
+            if (item == this) {
+                // Slightly clumsy-looking way to ensure that "this" is part
+                // of the list of items to move, this is to avoid allocations
+                // (appending this item to the list of selected items causes a
+                // detach).
+                if (movedMe)
+                    break;
+                movedMe = true;
+            }
+
+            if ((item->flags() & ItemIsMovable) && !QGraphicsItemPrivate::movableAncestorIsSelected(item)) {
+                QPointF currentParentPos;
+                QPointF buttonDownParentPos;
+                if (item->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorIgnoresTransformations) {
+                    // Items whose ancestors ignore transformations need to
+                    // map screen coordinates to local coordinates, then map
+                    // those to the parent.
+                    QTransform viewToItemTransform = (item->deviceTransform(view->viewportTransform())).inverted();
+                    currentParentPos = mapToParent(viewToItemTransform.map(QPointF(view->mapFromGlobal(event->screenPos()))));
+                    buttonDownParentPos = mapToParent(viewToItemTransform.map(QPointF(view->mapFromGlobal(event->buttonDownScreenPos(Qt::LeftButton)))));
+                } else if (item->flags() & ItemIgnoresTransformations) {
+                    // Root items that ignore transformations need to
+                    // calculate their diff by mapping viewport coordinates
+                    // directly to parent coordinates.
+                    // COMBINE
+                    QTransform itemTransform;
+                    if (item->d_ptr->transformData)
+                        itemTransform = item->d_ptr->transformData->computedFullTransform();
+                    itemTransform.translate(item->d_ptr->pos.x(), item->d_ptr->pos.y());
+                    QTransform viewToParentTransform = itemTransform
+                                                       * (item->sceneTransform() * view->viewportTransform()).inverted();
+                    currentParentPos = viewToParentTransform.map(QPointF(view->mapFromGlobal(event->screenPos())));
+                    buttonDownParentPos = viewToParentTransform.map(QPointF(view->mapFromGlobal(event->buttonDownScreenPos(Qt::LeftButton))));
+                } else {
+                    // All other items simply map from the scene.
+                    currentParentPos = item->mapToParent(item->mapFromScene(event->scenePos()));
+                    buttonDownParentPos = item->mapToParent(item->mapFromScene(event->buttonDownScenePos(Qt::LeftButton)));
+                }
+
+                item->setPos(initialPositions.value(item) + currentParentPos - buttonDownParentPos);
+
+                if (item->flags() & ItemIsSelectable)
+                    item->setSelected(true);
+            }
+            ++i;
+        }
+
+    } else {
+        event->ignore();
+    }
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to
+    receive mouse release events for this item.
+
+    Calling QEvent::ignore() or QEvent::accept() on \a event has no
+    effect.
+
+    The default implementation handles basic item interaction, such as
+    selection and moving. If you want to keep the base implementation
+    when reimplementing this function, call
+    QGraphicsItem::mouseReleaseEvent() in your reimplementation.
+
+    Please note that mousePressEvent() decides which graphics item it
+    is that receives mouse events. See the mousePressEvent()
+    description for details.
+
+    \sa mousePressEvent(), mouseMoveEvent(), mouseDoubleClickEvent(),
+    sceneEvent()
+*/
+void QGraphicsItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (flags() & ItemIsSelectable) {
+        bool multiSelect = (event->modifiers() & Qt::ControlModifier) != 0;
+        if (event->scenePos() == event->buttonDownScenePos(Qt::LeftButton)) {
+            // The item didn't move
+            if (multiSelect) {
+                setSelected(!isSelected());
+            } else {
+                bool selectionChanged = false;
+                if (QGraphicsScene *scene = d_ptr->scene) {
+                    ++scene->d_func()->selectionChanging;
+                    // Clear everything but this item. Bypass
+                    // QGraphicsScene::clearSelection()'s default behavior by
+                    // temporarily removing this item from the selection list.
+                    if (d_ptr->selected) {
+                        scene->d_func()->selectedItems.remove(this);
+                        foreach (QGraphicsItem *item, scene->d_func()->selectedItems) {
+                            if (item->isSelected()) {
+                                selectionChanged = true;
+                                break;
+                            }
+                        }
+                    }
+                    scene->clearSelection();
+                    if (d_ptr->selected)
+                        scene->d_func()->selectedItems.insert(this);
+                    --scene->d_func()->selectionChanging;
+                    if (selectionChanged)
+                        emit d_ptr->scene->selectionChanged();
+                }
+                setSelected(true);
+            }
+        }
+    }
+    if (d_ptr->scene && !event->buttons())
+        d_ptr->scene->d_func()->movingItemsInitialPositions.clear();
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to
+    receive mouse doubleclick events for this item.
+
+    When doubleclicking an item, the item will first receive a mouse
+    press event, followed by a release event (i.e., a click), then a
+    doubleclick event, and finally a release event.
+
+    Calling QEvent::ignore() or QEvent::accept() on \a event has no
+    effect.
+
+    The default implementation calls mousePressEvent(). If you want to
+    keep the base implementation when reimplementing this function,
+    call QGraphicsItem::mouseDoubleClickEvent() in your
+    reimplementation.
+
+    Note that an item will not receive double click events if it is
+    neither \l {QGraphicsItem::ItemIsSelectable}{selectable} nor
+    \l{QGraphicsItem::ItemIsMovable}{movable} (single mouse clicks are
+    ignored in this case, and that stops the generation of double
+    clicks).
+
+    \sa mousePressEvent(), mouseMoveEvent(), mouseReleaseEvent(), sceneEvent()
+*/
+void QGraphicsItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
+{
+    mousePressEvent(event);
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    wheel events for this item. If you reimplement this function, \a event
+    will be accepted by default.
+
+    If you ignore the event, (i.e., by calling QEvent::ignore(),) it will
+    propagate to any item beneath this item. If no items accept the event, it
+    will be ignored by the scene, and propagate to the view (e.g., the view's
+    vertical scroll bar).
+
+    The default implementation ignores the event.
+
+    \sa sceneEvent()
+*/
+void QGraphicsItem::wheelEvent(QGraphicsSceneWheelEvent *event)
+{
+    event->ignore();
+}
+
+/*!
+    This event handler, for event \a event, can be reimplemented to receive
+    input method events for this item. The default implementation ignores the
+    event.
+
+    \sa inputMethodQuery(), sceneEvent()
+*/
+void QGraphicsItem::inputMethodEvent(QInputMethodEvent *event)
+{
+    event->ignore();
+}
+
+/*!
+    This method is only relevant for input items. It is used by the
+    input method to query a set of properties of the item to be able
+    to support complex input method operations, such as support for
+    surrounding text and reconversions. \a query specifies which
+    property is queried.
+
+    \sa inputMethodEvent(), QInputMethodEvent, QInputContext
+*/
+QVariant QGraphicsItem::inputMethodQuery(Qt::InputMethodQuery query) const
+{
+    if (isWidget()) {
+        // ### Qt 5: Remove. The reimplementation in
+        // QGraphicsProxyWidget solves this problem (but requires a
+        // recompile to take effect).
+        return d_ptr->inputMethodQueryHelper(query);
+    }
+
+    Q_UNUSED(query);
+    return QVariant();
+}
+
+/*!
+    Returns the current input method hints of this item.
+
+    Input method hints are only relevant for input items.
+    The hints are used by the input method to indicate how it should operate.
+    For example, if the Qt::ImhNumbersOnly flag is set, the input method may change
+    its visual components to reflect that only numbers can be entered.
+
+    The effect may vary between input method implementations.
+
+    \since 4.6
+
+    \sa setInputMethodHints(), inputMethodQuery(), QInputContext
+*/
+Qt::InputMethodHints QGraphicsItem::inputMethodHints() const
+{
+    Q_D(const QGraphicsItem);
+    return d->imHints;
+}
+
+/*!
+    Sets the current input method hints of this item to \a hints.
+
+    \since 4.6
+
+    \sa inputMethodHints(), inputMethodQuery(), QInputContext
+*/
+void QGraphicsItem::setInputMethodHints(Qt::InputMethodHints hints)
+{
+    Q_D(QGraphicsItem);
+    d->imHints = hints;
+    if (!hasFocus())
+        return;
+    d->scene->d_func()->updateInputMethodSensitivityInViews();
+#if !defined(QT_NO_IM) && (defined(Q_WS_X11) || defined(Q_WS_QWS) || defined(Q_OS_SYMBIAN))
+    QWidget *fw = QApplication::focusWidget();
+    if (!fw)
+        return;
+    for (int i = 0 ; i < scene()->views().count() ; ++i)
+        if (scene()->views().at(i) == fw)
+            if (QInputContext *inputContext = fw->inputContext())
+                inputContext->update();
+#endif
+}
+
+/*!
+    Updates the item's micro focus.
+
+    \since 4.7
+
+    \sa QInputContext
+*/
+void QGraphicsItem::updateMicroFocus()
+{
+#if !defined(QT_NO_IM) && (defined(Q_WS_X11) || defined(Q_WS_QWS) || defined(Q_OS_SYMBIAN))
+    if (QWidget *fw = QApplication::focusWidget()) {
+        if (scene()) {
+            for (int i = 0 ; i < scene()->views().count() ; ++i) {
+                if (scene()->views().at(i) == fw)
+                    if (QInputContext *inputContext = fw->inputContext())
+                        inputContext->update();
+            }
+        }
+#ifndef QT_NO_ACCESSIBILITY
+        // ##### is this correct
+        QAccessible::updateAccessibility(fw, 0, QAccessible::StateChanged);
+#endif
+    }
+#endif
+}
+
+/*!
+    This virtual function is called by QGraphicsItem to notify custom items
+    that some part of the item's state changes. By reimplementing this
+    function, your can react to a change, and in some cases, (depending on \a
+    change,) adjustments can be made.
+
+    \a change is the parameter of the item that is changing. \a value is the
+    new value; the type of the value depends on \a change.
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 15
+
+    The default implementation does nothing, and returns \a value.
+
+    Note: Certain QGraphicsItem functions cannot be called in a
+    reimplementation of this function; see the GraphicsItemChange
+    documentation for details.
+
+    \sa GraphicsItemChange
+*/
+QVariant QGraphicsItem::itemChange(GraphicsItemChange change, const QVariant &value)
+{
+    Q_UNUSED(change);
+    return value;
+}
+
+/*!
+    \internal
+
+    Note: This is provided as a hook to avoid future problems related
+    to adding virtual functions.
+*/
+bool QGraphicsItem::supportsExtension(Extension extension) const
+{
+    Q_UNUSED(extension);
+    return false;
+}
+
+/*!
+    \internal
+
+    Note: This is provided as a hook to avoid future problems related
+    to adding virtual functions.
+*/
+void QGraphicsItem::setExtension(Extension extension, const QVariant &variant)
+{
+    Q_UNUSED(extension);
+    Q_UNUSED(variant);
+}
+
+/*!
+    \internal
+
+    Note: This is provided as a hook to avoid future problems related
+    to adding virtual functions.
+*/
+QVariant QGraphicsItem::extension(const QVariant &variant) const
+{
+    Q_UNUSED(variant);
+    return QVariant();
+}
+
+/*!
+    \internal
+
+    Adds this item to the scene's index. Called in conjunction with
+    removeFromIndex() to ensure the index bookkeeping is correct when
+    the item's position, transformation or shape changes.
+*/
+void QGraphicsItem::addToIndex()
+{
+    if (d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren) {
+        // ### add to child index only if applicable
+        return;
+    }
+    if (d_ptr->scene)
+        d_ptr->scene->d_func()->index->addItem(this);
+}
+
+/*!
+    \internal
+
+    Removes this item from the scene's index. Called in conjunction
+    with addToIndex() to ensure the index bookkeeping is correct when
+    the item's position, transformation or shape changes.
+*/
+void QGraphicsItem::removeFromIndex()
+{
+    if (d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren) {
+        // ### remove from child index only if applicable
+        return;
+    }
+    if (d_ptr->scene)
+        d_ptr->scene->d_func()->index->removeItem(this);
+}
+
+/*!
+    Prepares the item for a geometry change. Call this function before
+    changing the bounding rect of an item to keep QGraphicsScene's index up to
+    date.
+
+    prepareGeometryChange() will call update() if this is necessary.
+
+    Example:
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 16
+
+    \sa boundingRect()
+*/
+void QGraphicsItem::prepareGeometryChange()
+{
+    if (d_ptr->inDestructor)
+        return;
+    if (d_ptr->scene) {
+        d_ptr->scene->d_func()->dirtyGrowingItemsBoundingRect = true;
+        d_ptr->geometryChanged = 1;
+        d_ptr->paintedViewBoundingRectsNeedRepaint = 1;
+        d_ptr->notifyBoundingRectChanged = !d_ptr->inSetPosHelper;
+
+        QGraphicsScenePrivate *scenePrivate = d_ptr->scene->d_func();
+        scenePrivate->index->prepareBoundingRectChange(this);
+        scenePrivate->markDirty(this, QRectF(), /*invalidateChildren=*/true, /*force=*/false,
+                                /*ignoreOpacity=*/ false, /*removingItemFromScene=*/ false,
+                                /*updateBoundingRect=*/true);
+
+        // For compatibility reasons, we have to update the item's old geometry
+        // if someone is connected to the changed signal or the scene has no views.
+        // Note that this has to be done *after* markDirty to ensure that
+        // _q_processDirtyItems is called before _q_emitUpdated.
+        if (scenePrivate->isSignalConnected(scenePrivate->changedSignalIndex)
+            || scenePrivate->views.isEmpty()) {
+            if (d_ptr->hasTranslateOnlySceneTransform()) {
+                d_ptr->scene->update(boundingRect().translated(d_ptr->sceneTransform.dx(),
+                                                               d_ptr->sceneTransform.dy()));
+            } else {
+                d_ptr->scene->update(d_ptr->sceneTransform.mapRect(boundingRect()));
+            }
+        }
+    }
+
+    d_ptr->markParentDirty(/*updateBoundingRect=*/true);
+}
+
+/*!
+    \internal
+
+    Highlights \a item as selected.
+
+    NOTE: This function is a duplicate of qt_graphicsItem_highlightSelected() in
+          qgraphicssvgitem.cpp!
+*/
+static void qt_graphicsItem_highlightSelected(
+    QGraphicsItem *item, QPainter *painter, const QStyleOptionGraphicsItem *option)
+{
+    const QRectF murect = painter->transform().mapRect(QRectF(0, 0, 1, 1));
+    if (qFuzzyIsNull(qMax(murect.width(), murect.height())))
+        return;
+
+    const QRectF mbrect = painter->transform().mapRect(item->boundingRect());
+    if (qMin(mbrect.width(), mbrect.height()) < qreal(1.0))
+        return;
+
+    qreal itemPenWidth;
+    switch (item->type()) {
+        case QGraphicsEllipseItem::Type:
+            itemPenWidth = static_cast<QGraphicsEllipseItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsPathItem::Type:
+            itemPenWidth = static_cast<QGraphicsPathItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsPolygonItem::Type:
+            itemPenWidth = static_cast<QGraphicsPolygonItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsRectItem::Type:
+            itemPenWidth = static_cast<QGraphicsRectItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsSimpleTextItem::Type:
+            itemPenWidth = static_cast<QGraphicsSimpleTextItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsLineItem::Type:
+            itemPenWidth = static_cast<QGraphicsLineItem *>(item)->pen().widthF();
+            break;
+        default:
+            itemPenWidth = 1.0;
+    }
+    const qreal pad = itemPenWidth / 2;
+
+    const qreal penWidth = 0; // cosmetic pen
+
+    const QColor fgcolor = option->palette.windowText().color();
+    const QColor bgcolor( // ensure good contrast against fgcolor
+        fgcolor.red()   > 127 ? 0 : 255,
+        fgcolor.green() > 127 ? 0 : 255,
+        fgcolor.blue()  > 127 ? 0 : 255);
+
+    painter->setPen(QPen(bgcolor, penWidth, Qt::SolidLine));
+    painter->setBrush(Qt::NoBrush);
+    painter->drawRect(item->boundingRect().adjusted(pad, pad, -pad, -pad));
+
+    painter->setPen(QPen(option->palette.windowText(), 0, Qt::DashLine));
+    painter->setBrush(Qt::NoBrush);
+    painter->drawRect(item->boundingRect().adjusted(pad, pad, -pad, -pad));
+}
+
+/*!
+    \class QGraphicsObject
+    \brief The QGraphicsObject class provides a base class for all graphics items that
+    require signals, slots and properties.
+    \since 4.6
+    \ingroup graphicsview-api
+
+    The class extends a QGraphicsItem with QObject's signal/slot and property mechanisms.
+    It maps many of QGraphicsItem's basic setters and getters to properties and adds notification
+    signals for many of them.
+
+    \section1 Parents and Children
+
+    Each graphics object can be constructed with a parent item. This ensures that the
+    item will be destroyed when its parent item is destroyed. Although QGraphicsObject
+    inherits from both QObject and QGraphicsItem, you should use the functions provided
+    by QGraphicsItem, \e not QObject, to manage the relationships between parent and
+    child items.
+
+    The relationships between items can be explored using the parentItem() and childItems()
+    functions. In the hierarchy of items in a scene, the parentObject() and parentWidget()
+    functions are the equivalent of the QWidget::parent() and QWidget::parentWidget()
+    functions for QWidget subclasses.
+
+    \sa QGraphicsWidget
+*/
+
+/*!
+    Constructs a QGraphicsObject with \a parent.
+*/
+QGraphicsObject::QGraphicsObject(QGraphicsItem *parent)
+        : QGraphicsItem(parent)
+{
+    QGraphicsItem::d_ptr->isObject = true;
+}
+
+/*!
+  \internal
+*/
+QGraphicsObject::QGraphicsObject(QGraphicsItemPrivate &dd, QGraphicsItem *parent, QGraphicsScene *scene)
+    : QGraphicsItem(dd, parent, scene)
+{
+    QGraphicsItem::d_ptr->isObject = true;
+}
+
+#ifndef QT_NO_GESTURES
+/*!
+    Subscribes the graphics object to the given \a gesture with specific \a flags.
+
+    \sa ungrabGesture(), QGestureEvent
+*/
+void QGraphicsObject::grabGesture(Qt::GestureType gesture, Qt::GestureFlags flags)
+{
+    bool contains = QGraphicsItem::d_ptr->gestureContext.contains(gesture);
+    QGraphicsItem::d_ptr->gestureContext.insert(gesture, flags);
+    if (!contains && QGraphicsItem::d_ptr->scene)
+        QGraphicsItem::d_ptr->scene->d_func()->grabGesture(this, gesture);
+}
+
+/*!
+    Unsubscribes the graphics object from the given \a gesture.
+
+    \sa grabGesture(), QGestureEvent
+*/
+void QGraphicsObject::ungrabGesture(Qt::GestureType gesture)
+{
+    if (QGraphicsItem::d_ptr->gestureContext.remove(gesture) && QGraphicsItem::d_ptr->scene)
+        QGraphicsItem::d_ptr->scene->d_func()->ungrabGesture(this, gesture);
+}
+#endif // QT_NO_GESTURES
+
+/*!
+    Updates the item's micro focus. This is slot for convenience.
+
+    \since 4.7
+
+    \sa QInputContext
+*/
+void QGraphicsObject::updateMicroFocus()
+{
+    QGraphicsItem::updateMicroFocus();
+}
+
+void QGraphicsItemPrivate::children_append(QDeclarativeListProperty<QGraphicsObject> *list, QGraphicsObject *item)
+{
+    if (item) {
+        QGraphicsObject *graphicsObject = static_cast<QGraphicsObject *>(list->object);
+        if (QGraphicsItemPrivate::get(graphicsObject)->sendParentChangeNotification) {
+            item->setParentItem(graphicsObject);
+        } else {
+            QGraphicsItemPrivate::get(item)->setParentItemHelper(graphicsObject, 0, 0);
+        }
+    }
+}
+
+int QGraphicsItemPrivate::children_count(QDeclarativeListProperty<QGraphicsObject> *list)
+{
+    QGraphicsItemPrivate *d = QGraphicsItemPrivate::get(static_cast<QGraphicsObject *>(list->object));
+    return d->children.count();
+}
+
+QGraphicsObject *QGraphicsItemPrivate::children_at(QDeclarativeListProperty<QGraphicsObject> *list, int index)
+{
+    QGraphicsItemPrivate *d = QGraphicsItemPrivate::get(static_cast<QGraphicsObject *>(list->object));
+    if (index >= 0 && index < d->children.count())
+        return d->children.at(index)->toGraphicsObject();
+    else
+        return 0;
+}
+
+void QGraphicsItemPrivate::children_clear(QDeclarativeListProperty<QGraphicsObject> *list)
+{
+    QGraphicsItemPrivate *d = QGraphicsItemPrivate::get(static_cast<QGraphicsObject *>(list->object));
+    int childCount = d->children.count();
+    if (d->sendParentChangeNotification) {
+        for (int index = 0; index < childCount; index++)
+            d->children.at(0)->setParentItem(0);
+    } else {
+        for (int index = 0; index < childCount; index++)
+            QGraphicsItemPrivate::get(d->children.at(0))->setParentItemHelper(0, 0, 0);
+    }
+}
+
+/*!
+    Returns a list of this item's children.
+
+    The items are sorted by stacking order. This takes into account both the
+    items' insertion order and their Z-values.
+
+*/
+QDeclarativeListProperty<QGraphicsObject> QGraphicsItemPrivate::childrenList()
+{
+    Q_Q(QGraphicsItem);
+    if (isObject) {
+        QGraphicsObject *that = static_cast<QGraphicsObject *>(q);
+        return QDeclarativeListProperty<QGraphicsObject>(that, &children, children_append,
+                                                         children_count, children_at, children_clear);
+    } else {
+        //QGraphicsItem is not supported for this property
+        return QDeclarativeListProperty<QGraphicsObject>();
+    }
+}
+
+/*!
+  \internal
+  Returns the width of the item
+  Reimplemented by QGraphicsWidget
+*/
+qreal QGraphicsItemPrivate::width() const
+{
+    return 0;
+}
+
+/*!
+  \internal
+  Set the width of the item
+  Reimplemented by QGraphicsWidget
+*/
+void QGraphicsItemPrivate::setWidth(qreal w)
+{
+    Q_UNUSED(w);
+}
+
+/*!
+  \internal
+  Reset the width of the item
+  Reimplemented by QGraphicsWidget
+*/
+void QGraphicsItemPrivate::resetWidth()
+{
+}
+
+/*!
+  \internal
+  Returns the height of the item
+  Reimplemented by QGraphicsWidget
+*/
+qreal QGraphicsItemPrivate::height() const
+{
+    return 0;
+}
+
+/*!
+  \internal
+  Set the height of the item
+  Reimplemented by QGraphicsWidget
+*/
+void QGraphicsItemPrivate::setHeight(qreal h)
+{
+    Q_UNUSED(h);
+}
+
+/*!
+  \internal
+  Reset the height of the item
+  Reimplemented by QGraphicsWidget
+*/
+void QGraphicsItemPrivate::resetHeight()
+{
+}
+
+/*!
+    \property QGraphicsObject::children
+    \since 4.7
+    \internal
+*/
+
+/*!
+    \property QGraphicsObject::width
+    \since 4.7
+    \internal
+*/
+
+/*!
+    \property QGraphicsObject::height
+    \since 4.7
+    \internal
+*/
+
+/*!
+  \property QGraphicsObject::parent
+  \brief the parent of the item
+
+  \note The item's parent is set independently of the parent object returned
+  by QObject::parent().
+
+  \sa QGraphicsItem::setParentItem(), QGraphicsItem::parentObject()
+*/
+
+/*!
+  \property QGraphicsObject::opacity
+  \brief the opacity of the item
+
+  \sa QGraphicsItem::setOpacity(), QGraphicsItem::opacity()
+*/
+
+/*!
+  \fn QGraphicsObject::opacityChanged()
+
+  This signal gets emitted whenever the opacity of the item changes
+
+  \sa QGraphicsItem::opacity()
+*/
+
+/*!
+  \fn QGraphicsObject::parentChanged()
+
+  This signal gets emitted whenever the parent of the item changes
+*/
+
+/*!
+  \property QGraphicsObject::pos
+  \brief the position of the item
+
+  Describes the items position.
+
+  \sa QGraphicsItem::setPos(), QGraphicsItem::pos()
+*/
+
+/*!
+  \property QGraphicsObject::x
+  \brief the x position of the item
+
+  Describes the items x position.
+
+  \sa QGraphicsItem::setX(), setPos(), xChanged()
+*/
+
+/*!
+  \fn QGraphicsObject::xChanged()
+
+  This signal gets emitted whenever the x position of the item changes
+
+  \sa pos()
+*/
+
+/*!
+  \property QGraphicsObject::y
+  \brief the y position of the item
+
+  Describes the items y position.
+
+  \sa QGraphicsItem::setY(), setPos(), yChanged()
+*/
+
+/*!
+  \fn QGraphicsObject::yChanged()
+
+  This signal gets emitted whenever the y position of the item changes.
+
+  \sa pos()
+*/
+
+/*!
+  \property QGraphicsObject::z
+  \brief the z value of the item
+
+  Describes the items z value.
+
+  \sa QGraphicsItem::setZValue(), zValue(), zChanged()
+*/
+
+/*!
+  \fn QGraphicsObject::zChanged()
+
+  This signal gets emitted whenever the z value of the item changes.
+
+  \sa pos()
+*/
+
+/*!
+  \property QGraphicsObject::rotation
+  This property holds the rotation of the item in degrees.
+
+  This specifies how many degrees to rotate the item around its transformOrigin.
+  The default rotation is 0 degrees (i.e. not rotated at all).
+*/
+
+/*!
+  \fn QGraphicsObject::rotationChanged()
+
+  This signal gets emitted whenever the roation of the item changes.
+*/
+
+/*!
+  \property QGraphicsObject::scale
+  This property holds the scale of the item.
+
+  A scale of less than 1 means the item will be displayed smaller than
+  normal, and a scale of greater than 1 means the item will be
+  displayed larger than normal.  A negative scale means the item will
+  be mirrored.
+
+  By default, items are displayed at a scale of 1 (i.e. at their
+  normal size).
+
+  Scaling is from the item's transformOrigin.
+*/
+
+/*!
+  \fn void QGraphicsObject::scaleChanged()
+
+  This signal is emitted when the scale of the item changes.
+*/
+
+
+/*!
+  \property QGraphicsObject::enabled
+  \brief whether the item is enabled or not
+
+  This property is declared in QGraphicsItem.
+
+  By default, this property is true.
+
+  \sa QGraphicsItem::isEnabled(), QGraphicsItem::setEnabled()
+  \sa QGraphicsObject::enabledChanged()
+*/
+
+/*!
+  \fn void QGraphicsObject::enabledChanged()
+
+  This signal gets emitted whenever the item get's enabled or disabled.
+
+  \sa isEnabled()
+*/
+
+/*!
+  \property QGraphicsObject::visible
+  \brief whether the item is visible or not
+
+  This property is declared in QGraphicsItem.
+
+  By default, this property is true.
+
+  \sa QGraphicsItem::isVisible(), QGraphicsItem::setVisible(), visibleChanged()
+*/
+
+/*!
+  \fn QGraphicsObject::visibleChanged()
+
+  This signal gets emitted whenever the visibility of the item changes
+
+  \sa visible
+*/
+
+/*!
+  \fn const QObjectList &QGraphicsObject::children() const
+  \internal
+
+  This function returns the same value as QObject::children(). It's
+  provided to differentiate between the obsolete member
+  QGraphicsItem::children() and QObject::children(). QGraphicsItem now
+  provides childItems() instead.
+*/
+
+/*!
+  \property QGraphicsObject::transformOriginPoint
+  \brief the transformation origin
+
+  This property sets a specific point in the items coordiante system as the
+  origin for scale and rotation.
+
+  \sa scale, rotation, QGraphicsItem::transformOriginPoint()
+*/
+
+/*!
+    \fn void QGraphicsObject::widthChanged()
+    \internal
+*/
+
+/*!
+    \fn void QGraphicsObject::heightChanged()
+    \internal
+*/
+
+/*!
+
+  \fn QGraphicsObject::childrenChanged()
+
+  This signal gets emitted whenever the children list changes
+  \internal
+*/
+
+/*!
+  \property QGraphicsObject::effect
+  \since 4.7
+  \brief the effect attached to this item
+
+  \sa QGraphicsItem::setGraphicsEffect(), QGraphicsItem::graphicsEffect()
+*/
+
+/*!
+    \class QAbstractGraphicsShapeItem
+    \brief The QAbstractGraphicsShapeItem class provides a common base for
+    all path items.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    This class does not fully implement an item by itself; in particular, it
+    does not implement boundingRect() and paint(), which are inherited by
+    QGraphicsItem.
+
+    You can subclass this item to provide a simple base implementation of
+    accessors for the item's pen and brush.
+
+    \sa QGraphicsRectItem, QGraphicsEllipseItem, QGraphicsPathItem,
+    QGraphicsPolygonItem, QGraphicsTextItem, QGraphicsLineItem,
+    QGraphicsPixmapItem, {Graphics View Framework}
+*/
+
+class QAbstractGraphicsShapeItemPrivate : public QGraphicsItemPrivate
+{
+    Q_DECLARE_PUBLIC(QAbstractGraphicsShapeItem)
+public:
+
+    QBrush brush;
+    QPen pen;
+
+    // Cached bounding rectangle
+    mutable QRectF boundingRect;
+};
+
+/*!
+    Constructs a QAbstractGraphicsShapeItem. \a parent is passed to
+    QGraphicsItem's constructor.
+*/
+QAbstractGraphicsShapeItem::QAbstractGraphicsShapeItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                                       // obsolete argument
+                                                       , QGraphicsScene *scene
+#endif
+    )
+    : QGraphicsItem(*new QAbstractGraphicsShapeItemPrivate, parent, scene)
+{
+}
+
+/*!
+    \internal
+*/
+QAbstractGraphicsShapeItem::QAbstractGraphicsShapeItem(QAbstractGraphicsShapeItemPrivate &dd,
+                                                     QGraphicsItem *parent,
+                                                     QGraphicsScene *scene)
+    : QGraphicsItem(dd, parent, scene)
+{
+}
+
+/*!
+    Destroys a QAbstractGraphicsShapeItem.
+*/
+QAbstractGraphicsShapeItem::~QAbstractGraphicsShapeItem()
+{
+}
+
+/*!
+    Returns the item's pen. If no pen has been set, this function returns
+    QPen(), a default black solid line pen with 0 width.
+*/
+QPen QAbstractGraphicsShapeItem::pen() const
+{
+    Q_D(const QAbstractGraphicsShapeItem);
+    return d->pen;
+}
+
+/*!
+    Sets the pen for this item to \a pen.
+
+    The pen is used to draw the item's outline.
+
+    \sa pen()
+*/
+void QAbstractGraphicsShapeItem::setPen(const QPen &pen)
+{
+    Q_D(QAbstractGraphicsShapeItem);
+    if (d->pen == pen)
+        return;
+    prepareGeometryChange();
+    d->pen = pen;
+    d->boundingRect = QRectF();
+    update();
+}
+
+/*!
+    Returns the item's brush, or an empty brush if no brush has been set.
+
+    \sa setBrush()
+*/
+QBrush QAbstractGraphicsShapeItem::brush() const
+{
+    Q_D(const QAbstractGraphicsShapeItem);
+    return d->brush;
+}
+
+/*!
+    Sets the item's brush to \a brush.
+
+    The item's brush is used to fill the item.
+
+    If you use a brush with a QGradient, the gradient
+    is relative to the item's coordinate system.
+
+    \sa brush()
+*/
+void QAbstractGraphicsShapeItem::setBrush(const QBrush &brush)
+{
+    Q_D(QAbstractGraphicsShapeItem);
+    if (d->brush == brush)
+        return;
+    d->brush = brush;
+    update();
+}
+
+/*!
+    \reimp
+*/
+bool QAbstractGraphicsShapeItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QGraphicsItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QAbstractGraphicsShapeItem::opaqueArea() const
+{
+    Q_D(const QAbstractGraphicsShapeItem);
+    if (d->brush.isOpaque())
+        return isClipped() ? clipPath() : shape();
+    return QGraphicsItem::opaqueArea();
+}
+
+/*!
+    \class QGraphicsPathItem
+    \brief The QGraphicsPathItem class provides a path item that you
+    can add to a QGraphicsScene.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    To set the item's path, pass a QPainterPath to QGraphicsPathItem's
+    constructor, or call the setPath() function. The path() function
+    returns the current path.
+
+    \image graphicsview-pathitem.png
+
+    QGraphicsPathItem uses the path to provide a reasonable
+    implementation of boundingRect(), shape(), and contains(). The
+    paint() function draws the path using the item's associated pen
+    and brush, which you can set by calling the setPen() and
+    setBrush() functions.
+
+    \sa QGraphicsRectItem, QGraphicsEllipseItem, QGraphicsPolygonItem,
+    QGraphicsTextItem, QGraphicsLineItem, QGraphicsPixmapItem, {Graphics
+    View Framework}
+*/
+
+class QGraphicsPathItemPrivate : public QAbstractGraphicsShapeItemPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsPathItem)
+public:
+    QPainterPath path;
+};
+
+/*!
+    Constructs a QGraphicsPath item using \a path as the default path. \a
+    parent is passed to QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsPathItem::QGraphicsPathItem(const QPainterPath &path,
+                                     QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsPathItemPrivate, parent, scene)
+{
+    if (!path.isEmpty())
+        setPath(path);
+}
+
+/*!
+    Constructs a QGraphicsPath. \a parent is passed to
+    QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsPathItem::QGraphicsPathItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsPathItemPrivate, parent, scene)
+{
+}
+
+/*!
+    Destroys the QGraphicsPathItem.
+*/
+QGraphicsPathItem::~QGraphicsPathItem()
+{
+}
+
+/*!
+    Returns the item's path as a QPainterPath. If no item has been set, an
+    empty QPainterPath is returned.
+
+    \sa setPath()
+*/
+QPainterPath QGraphicsPathItem::path() const
+{
+    Q_D(const QGraphicsPathItem);
+    return d->path;
+}
+
+/*!
+    Sets the item's path to be the given \a path.
+
+    \sa path()
+*/
+void QGraphicsPathItem::setPath(const QPainterPath &path)
+{
+    Q_D(QGraphicsPathItem);
+    if (d->path == path)
+        return;
+    prepareGeometryChange();
+    d->path = path;
+    d->boundingRect = QRectF();
+    update();
+}
+
+/*!
+    \reimp
+*/
+QRectF QGraphicsPathItem::boundingRect() const
+{
+    Q_D(const QGraphicsPathItem);
+    if (d->boundingRect.isNull()) {
+        qreal pw = pen().widthF();
+        if (pw == 0.0)
+            d->boundingRect = d->path.controlPointRect();
+        else {
+            d->boundingRect = shape().controlPointRect();
+        }
+    }
+    return d->boundingRect;
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsPathItem::shape() const
+{
+    Q_D(const QGraphicsPathItem);
+    return qt_graphicsItem_shapeFromPath(d->path, d->pen);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsPathItem::contains(const QPointF &point) const
+{
+    return QAbstractGraphicsShapeItem::contains(point);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsPathItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+                              QWidget *widget)
+{
+    Q_D(QGraphicsPathItem);
+    Q_UNUSED(widget);
+    painter->setPen(d->pen);
+    painter->setBrush(d->brush);
+    painter->drawPath(d->path);
+
+    if (option->state & QStyle::State_Selected)
+        qt_graphicsItem_highlightSelected(this, painter, option);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsPathItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QAbstractGraphicsShapeItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsPathItem::opaqueArea() const
+{
+    return QAbstractGraphicsShapeItem::opaqueArea();
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsPathItem::type() const
+{
+    return Type;
+}
+
+/*!
+    \internal
+*/
+bool QGraphicsPathItem::supportsExtension(Extension extension) const
+{
+    Q_UNUSED(extension);
+    return false;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsPathItem::setExtension(Extension extension, const QVariant &variant)
+{
+    Q_UNUSED(extension);
+    Q_UNUSED(variant);
+}
+
+/*!
+    \internal
+*/
+QVariant QGraphicsPathItem::extension(const QVariant &variant) const
+{
+    Q_UNUSED(variant);
+    return QVariant();
+}
+
+/*!
+    \class QGraphicsRectItem
+    \brief The QGraphicsRectItem class provides a rectangle item that you
+    can add to a QGraphicsScene.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    To set the item's rectangle, pass a QRectF to QGraphicsRectItem's
+    constructor, or call the setRect() function. The rect() function
+    returns the current rectangle.
+
+    \image graphicsview-rectitem.png
+
+    QGraphicsRectItem uses the rectangle and the pen width to provide
+    a reasonable implementation of boundingRect(), shape(), and
+    contains(). The paint() function draws the rectangle using the
+    item's associated pen and brush, which you can set by calling the
+    setPen() and setBrush() functions.
+
+    \note The rendering of invalid rectangles, such as those with negative
+    widths or heights, is undefined. If you cannot be sure that you are
+    using valid rectangles (for example, if you are creating
+    rectangles using data from an unreliable source) then you should
+    use QRectF::normalized() to create normalized rectangles, and use
+    those instead.
+
+    \sa QGraphicsPathItem, QGraphicsEllipseItem, QGraphicsPolygonItem,
+    QGraphicsTextItem, QGraphicsLineItem, QGraphicsPixmapItem, {Graphics
+    View Framework}
+*/
+
+class QGraphicsRectItemPrivate : public QAbstractGraphicsShapeItemPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsRectItem)
+public:
+    QRectF rect;
+};
+
+/*!
+    Constructs a QGraphicsRectItem, using \a rect as the default rectangle.
+    \a parent is passed to QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsRectItem::QGraphicsRectItem(const QRectF &rect, QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsRectItemPrivate, parent, scene)
+{
+    setRect(rect);
+}
+
+/*!
+    \fn QGraphicsRectItem::QGraphicsRectItem(qreal x, qreal y, qreal width, qreal height,
+                                     QGraphicsItem *parent)
+
+    Constructs a QGraphicsRectItem with a default rectangle defined
+    by (\a x, \a y) and the given \a width and \a height.
+
+    \a parent is passed to QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsRectItem::QGraphicsRectItem(qreal x, qreal y, qreal w, qreal h,
+                                     QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsRectItemPrivate, parent, scene)
+{
+    setRect(QRectF(x, y, w, h));
+}
+
+/*!
+    Constructs a QGraphicsRectItem. \a parent is passed to
+    QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsRectItem::QGraphicsRectItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsRectItemPrivate, parent, scene)
+{
+}
+
+/*!
+    Destroys the QGraphicsRectItem.
+*/
+QGraphicsRectItem::~QGraphicsRectItem()
+{
+}
+
+/*!
+    Returns the item's rectangle.
+
+    \sa setRect()
+*/
+QRectF QGraphicsRectItem::rect() const
+{
+    Q_D(const QGraphicsRectItem);
+    return d->rect;
+}
+
+/*!
+    \fn void QGraphicsRectItem::setRect(const QRectF &rectangle)
+
+    Sets the item's rectangle to be the given \a rectangle.
+
+    \sa rect()
+*/
+void QGraphicsRectItem::setRect(const QRectF &rect)
+{
+    Q_D(QGraphicsRectItem);
+    if (d->rect == rect)
+        return;
+    prepareGeometryChange();
+    d->rect = rect;
+    d->boundingRect = QRectF();
+    update();
+}
+
+/*!
+    \fn void QGraphicsRectItem::setRect(qreal x, qreal y, qreal width, qreal height)
+    \fn void QGraphicsEllipseItem::setRect(qreal x, qreal y, qreal width, qreal height)
+
+    Sets the item's rectangle to the rectangle defined by (\a x, \a y)
+    and the given \a width and \a height.
+
+    This convenience function is equivalent to calling \c
+    {setRect(QRectF(x, y, width, height))}
+
+    \sa rect()
+*/
+
+/*!
+    \reimp
+*/
+QRectF QGraphicsRectItem::boundingRect() const
+{
+    Q_D(const QGraphicsRectItem);
+    if (d->boundingRect.isNull()) {
+        qreal halfpw = pen().widthF() / 2;
+        d->boundingRect = d->rect;
+        if (halfpw > 0.0)
+            d->boundingRect.adjust(-halfpw, -halfpw, halfpw, halfpw);
+    }
+    return d->boundingRect;
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsRectItem::shape() const
+{
+    Q_D(const QGraphicsRectItem);
+    QPainterPath path;
+    path.addRect(d->rect);
+    return qt_graphicsItem_shapeFromPath(path, d->pen);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsRectItem::contains(const QPointF &point) const
+{
+    return QAbstractGraphicsShapeItem::contains(point);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+                              QWidget *widget)
+{
+    Q_D(QGraphicsRectItem);
+    Q_UNUSED(widget);
+    painter->setPen(d->pen);
+    painter->setBrush(d->brush);
+    painter->drawRect(d->rect);
+
+    if (option->state & QStyle::State_Selected)
+        qt_graphicsItem_highlightSelected(this, painter, option);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsRectItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QAbstractGraphicsShapeItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsRectItem::opaqueArea() const
+{
+    return QAbstractGraphicsShapeItem::opaqueArea();
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsRectItem::type() const
+{
+    return Type;
+}
+
+/*!
+    \internal
+*/
+bool QGraphicsRectItem::supportsExtension(Extension extension) const
+{
+    Q_UNUSED(extension);
+    return false;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsRectItem::setExtension(Extension extension, const QVariant &variant)
+{
+    Q_UNUSED(extension);
+    Q_UNUSED(variant);
+}
+
+/*!
+    \internal
+*/
+QVariant QGraphicsRectItem::extension(const QVariant &variant) const
+{
+    Q_UNUSED(variant);
+    return QVariant();
+}
+
+/*!
+    \class QGraphicsEllipseItem
+    \brief The QGraphicsEllipseItem class provides an ellipse item that you
+    can add to a QGraphicsScene.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    QGraphicsEllipseItem respresents an ellipse with a fill and an outline,
+    and you can also use it for ellipse segments (see startAngle(),
+    spanAngle()).
+
+    \table
+        \row
+            \o \inlineimage graphicsview-ellipseitem.png
+            \o \inlineimage graphicsview-ellipseitem-pie.png
+    \endtable
+
+    To set the item's ellipse, pass a QRectF to QGraphicsEllipseItem's
+    constructor, or call setRect(). The rect() function returns the
+    current ellipse geometry.
+
+    QGraphicsEllipseItem uses the rect and the pen width to provide a
+    reasonable implementation of boundingRect(), shape(), and contains(). The
+    paint() function draws the ellipse using the item's associated pen and
+    brush, which you can set by calling setPen() and setBrush().
+
+    \sa QGraphicsPathItem, QGraphicsRectItem, QGraphicsPolygonItem,
+    QGraphicsTextItem, QGraphicsLineItem, QGraphicsPixmapItem, {Graphics
+    View Framework}
+*/
+
+class QGraphicsEllipseItemPrivate : public QAbstractGraphicsShapeItemPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsEllipseItem)
+public:
+    inline QGraphicsEllipseItemPrivate()
+        : startAngle(0), spanAngle(360 * 16)
+    { }
+
+    QRectF rect;
+    int startAngle;
+    int spanAngle;
+};
+
+/*!
+    Constructs a QGraphicsEllipseItem using \a rect as the default rectangle.
+    \a parent is passed to QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsEllipseItem::QGraphicsEllipseItem(const QRectF &rect, QGraphicsItem *parent
+#ifndef Q_QDOC
+                                           // obsolete argument
+                                           , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsEllipseItemPrivate, parent, scene)
+{
+    setRect(rect);
+}
+
+/*!
+    \fn QGraphicsEllipseItem::QGraphicsEllipseItem(qreal x, qreal y, qreal width, qreal height, QGraphicsItem *parent)
+    \since 4.3
+
+    Constructs a QGraphicsEllipseItem using the rectangle defined by (\a x, \a
+    y) and the given \a width and \a height, as the default rectangle. \a
+    parent is passed to QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsEllipseItem::QGraphicsEllipseItem(qreal x, qreal y, qreal w, qreal h,
+                                           QGraphicsItem *parent
+#ifndef Q_QDOC
+                                           // obsolete argument
+                                           , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsEllipseItemPrivate, parent, scene)
+{
+    setRect(x,y,w,h);
+}
+
+
+
+/*!
+    Constructs a QGraphicsEllipseItem. \a parent is passed to
+    QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsEllipseItem::QGraphicsEllipseItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                           // obsolete argument
+                                           , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsEllipseItemPrivate, parent, scene)
+{
+}
+
+/*!
+    Destroys the QGraphicsEllipseItem.
+*/
+QGraphicsEllipseItem::~QGraphicsEllipseItem()
+{
+}
+
+/*!
+    Returns the item's ellipse geometry as a QRectF.
+
+    \sa setRect(), QPainter::drawEllipse()
+*/
+QRectF QGraphicsEllipseItem::rect() const
+{
+    Q_D(const QGraphicsEllipseItem);
+    return d->rect;
+}
+
+/*!
+    Sets the item's ellipse geometry to \a rect. The rectangle's left edge
+    defines the left edge of the ellipse, and the rectangle's top edge
+    describes the top of the ellipse. The height and width of the rectangle
+    describe the height and width of the ellipse.
+
+    \sa rect(), QPainter::drawEllipse()
+*/
+void QGraphicsEllipseItem::setRect(const QRectF &rect)
+{
+    Q_D(QGraphicsEllipseItem);
+    if (d->rect == rect)
+        return;
+    prepareGeometryChange();
+    d->rect = rect;
+    d->boundingRect = QRectF();
+    update();
+}
+
+/*!
+    Returns the start angle for an ellipse segment in 16ths of a degree. This
+    angle is used together with spanAngle() for representing an ellipse
+    segment (a pie). By default, the start angle is 0.
+
+    \sa setStartAngle(), spanAngle()
+*/
+int QGraphicsEllipseItem::startAngle() const
+{
+    Q_D(const QGraphicsEllipseItem);
+    return d->startAngle;
+}
+
+/*!
+    Sets the start angle for an ellipse segment to \a angle, which is in 16ths
+    of a degree. This angle is used together with spanAngle() for representing
+    an ellipse segment (a pie). By default, the start angle is 0.
+
+    \sa startAngle(), setSpanAngle(), QPainter::drawPie()
+*/
+void QGraphicsEllipseItem::setStartAngle(int angle)
+{
+    Q_D(QGraphicsEllipseItem);
+    if (angle != d->startAngle) {
+        prepareGeometryChange();
+        d->boundingRect = QRectF();
+        d->startAngle = angle;
+        update();
+    }
+}
+
+/*!
+    Returns the span angle of an ellipse segment in 16ths of a degree. This
+    angle is used together with startAngle() for representing an ellipse
+    segment (a pie). By default, this function returns 5760 (360 * 16, a full
+    ellipse).
+
+    \sa setSpanAngle(), startAngle()
+*/
+int QGraphicsEllipseItem::spanAngle() const
+{
+    Q_D(const QGraphicsEllipseItem);
+    return d->spanAngle;
+}
+
+/*!
+    Sets the span angle for an ellipse segment to \a angle, which is in 16ths
+    of a degree. This angle is used together with startAngle() to represent an
+    ellipse segment (a pie). By default, the span angle is 5760 (360 * 16, a
+    full ellipse).
+
+    \sa spanAngle(), setStartAngle(), QPainter::drawPie()
+*/
+void QGraphicsEllipseItem::setSpanAngle(int angle)
+{
+    Q_D(QGraphicsEllipseItem);
+    if (angle != d->spanAngle) {
+        prepareGeometryChange();
+        d->boundingRect = QRectF();
+        d->spanAngle = angle;
+        update();
+    }
+}
+
+/*!
+    \reimp
+*/
+QRectF QGraphicsEllipseItem::boundingRect() const
+{
+    Q_D(const QGraphicsEllipseItem);
+    if (d->boundingRect.isNull()) {
+        qreal pw = pen().widthF();
+        if (pw == 0.0 && d->spanAngle == 360 * 16)
+            d->boundingRect = d->rect;
+        else
+            d->boundingRect = shape().controlPointRect();
+    }
+    return d->boundingRect;
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsEllipseItem::shape() const
+{
+    Q_D(const QGraphicsEllipseItem);
+    QPainterPath path;
+    if (d->rect.isNull())
+        return path;
+    if (d->spanAngle != 360 * 16) {
+        path.moveTo(d->rect.center());
+        path.arcTo(d->rect, d->startAngle / 16.0, d->spanAngle / 16.0);
+    } else {
+        path.addEllipse(d->rect);
+    }
+
+    return qt_graphicsItem_shapeFromPath(path, d->pen);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsEllipseItem::contains(const QPointF &point) const
+{
+    return QAbstractGraphicsShapeItem::contains(point);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsEllipseItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+                                 QWidget *widget)
+{
+    Q_D(QGraphicsEllipseItem);
+    Q_UNUSED(widget);
+    painter->setPen(d->pen);
+    painter->setBrush(d->brush);
+    if ((d->spanAngle != 0) && (qAbs(d->spanAngle) % (360 * 16) == 0))
+        painter->drawEllipse(d->rect);
+    else
+        painter->drawPie(d->rect, d->startAngle, d->spanAngle);
+
+    if (option->state & QStyle::State_Selected)
+        qt_graphicsItem_highlightSelected(this, painter, option);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsEllipseItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QAbstractGraphicsShapeItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsEllipseItem::opaqueArea() const
+{
+    return QAbstractGraphicsShapeItem::opaqueArea();
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsEllipseItem::type() const
+{
+    return Type;
+}
+
+
+/*!
+    \internal
+*/
+bool QGraphicsEllipseItem::supportsExtension(Extension extension) const
+{
+    Q_UNUSED(extension);
+    return false;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsEllipseItem::setExtension(Extension extension, const QVariant &variant)
+{
+    Q_UNUSED(extension);
+    Q_UNUSED(variant);
+}
+
+/*!
+    \internal
+*/
+QVariant QGraphicsEllipseItem::extension(const QVariant &variant) const
+{
+    Q_UNUSED(variant);
+    return QVariant();
+}
+
+/*!
+    \class QGraphicsPolygonItem
+    \brief The QGraphicsPolygonItem class provides a polygon item that you
+    can add to a QGraphicsScene.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    To set the item's polygon, pass a QPolygonF to
+    QGraphicsPolygonItem's constructor, or call the setPolygon()
+    function. The polygon() function returns the current polygon.
+
+    \image graphicsview-polygonitem.png
+
+    QGraphicsPolygonItem uses the polygon and the pen width to provide
+    a reasonable implementation of boundingRect(), shape(), and
+    contains(). The paint() function draws the polygon using the
+    item's associated pen and brush, which you can set by calling the
+    setPen() and setBrush() functions.
+
+    \sa QGraphicsPathItem, QGraphicsRectItem, QGraphicsEllipseItem,
+    QGraphicsTextItem, QGraphicsLineItem, QGraphicsPixmapItem, {Graphics
+    View Framework}
+*/
+
+class QGraphicsPolygonItemPrivate : public QAbstractGraphicsShapeItemPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsPolygonItem)
+public:
+    inline QGraphicsPolygonItemPrivate()
+        : fillRule(Qt::OddEvenFill)
+    { }
+
+    QPolygonF polygon;
+    Qt::FillRule fillRule;
+};
+
+/*!
+    Constructs a QGraphicsPolygonItem with \a polygon as the default
+    polygon. \a parent is passed to QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsPolygonItem::QGraphicsPolygonItem(const QPolygonF &polygon,
+                                           QGraphicsItem *parent
+#ifndef Q_QDOC
+                                           // obsolete argument
+                                           , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsPolygonItemPrivate, parent, scene)
+{
+    setPolygon(polygon);
+}
+
+/*!
+    Constructs a QGraphicsPolygonItem. \a parent is passed to
+    QAbstractGraphicsShapeItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsPolygonItem::QGraphicsPolygonItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                           // obsolete argument
+                                           , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsPolygonItemPrivate, parent, scene)
+{
+}
+
+/*!
+    Destroys the QGraphicsPolygonItem.
+*/
+QGraphicsPolygonItem::~QGraphicsPolygonItem()
+{
+}
+
+/*!
+    Returns the item's polygon, or an empty polygon if no polygon
+    has been set.
+
+    \sa setPolygon()
+*/
+QPolygonF QGraphicsPolygonItem::polygon() const
+{
+    Q_D(const QGraphicsPolygonItem);
+    return d->polygon;
+}
+
+/*!
+    Sets the item's polygon to be the given \a polygon.
+
+    \sa polygon()
+*/
+void QGraphicsPolygonItem::setPolygon(const QPolygonF &polygon)
+{
+    Q_D(QGraphicsPolygonItem);
+    if (d->polygon == polygon)
+        return;
+    prepareGeometryChange();
+    d->polygon = polygon;
+    d->boundingRect = QRectF();
+    update();
+}
+
+/*!
+     Returns the fill rule of the polygon. The default fill rule is
+     Qt::OddEvenFill.
+
+     \sa setFillRule(), QPainterPath::fillRule(), QPainter::drawPolygon()
+*/
+Qt::FillRule QGraphicsPolygonItem::fillRule() const
+{
+     Q_D(const QGraphicsPolygonItem);
+     return d->fillRule;
+}
+
+/*!
+     Sets the fill rule of the polygon to \a rule. The default fill rule is
+     Qt::OddEvenFill.
+
+     \sa fillRule(), QPainterPath::fillRule(), QPainter::drawPolygon()
+*/
+void QGraphicsPolygonItem::setFillRule(Qt::FillRule rule)
+{
+     Q_D(QGraphicsPolygonItem);
+     if (rule != d->fillRule) {
+         d->fillRule = rule;
+         update();
+     }
+}
+
+/*!
+    \reimp
+*/
+QRectF QGraphicsPolygonItem::boundingRect() const
+{
+    Q_D(const QGraphicsPolygonItem);
+    if (d->boundingRect.isNull()) {
+        qreal pw = pen().widthF();
+        if (pw == 0.0)
+            d->boundingRect = d->polygon.boundingRect();
+        else
+            d->boundingRect = shape().controlPointRect();
+    }
+    return d->boundingRect;
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsPolygonItem::shape() const
+{
+    Q_D(const QGraphicsPolygonItem);
+    QPainterPath path;
+    path.addPolygon(d->polygon);
+    return qt_graphicsItem_shapeFromPath(path, d->pen);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsPolygonItem::contains(const QPointF &point) const
+{
+    return QAbstractGraphicsShapeItem::contains(point);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsPolygonItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_D(QGraphicsPolygonItem);
+    Q_UNUSED(widget);
+    painter->setPen(d->pen);
+    painter->setBrush(d->brush);
+    painter->drawPolygon(d->polygon, d->fillRule);
+
+    if (option->state & QStyle::State_Selected)
+        qt_graphicsItem_highlightSelected(this, painter, option);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsPolygonItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QAbstractGraphicsShapeItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsPolygonItem::opaqueArea() const
+{
+    return QAbstractGraphicsShapeItem::opaqueArea();
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsPolygonItem::type() const
+{
+    return Type;
+}
+
+/*!
+    \internal
+*/
+bool QGraphicsPolygonItem::supportsExtension(Extension extension) const
+{
+    Q_UNUSED(extension);
+    return false;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsPolygonItem::setExtension(Extension extension, const QVariant &variant)
+{
+    Q_UNUSED(extension);
+    Q_UNUSED(variant);
+}
+
+/*!
+    \internal
+*/
+QVariant QGraphicsPolygonItem::extension(const QVariant &variant) const
+{
+    Q_UNUSED(variant);
+    return QVariant();
+}
+
+/*!
+    \class QGraphicsLineItem
+    \brief The QGraphicsLineItem class provides a line item that you can add to a
+    QGraphicsScene.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    To set the item's line, pass a QLineF to QGraphicsLineItem's
+    constructor, or call the setLine() function. The line() function
+    returns the current line. By default the line is black with a
+    width of 0, but you can change this by calling setPen().
+
+    \img graphicsview-lineitem.png
+
+    QGraphicsLineItem uses the line and the pen width to provide a reasonable
+    implementation of boundingRect(), shape(), and contains(). The paint()
+    function draws the line using the item's associated pen.
+
+    \sa QGraphicsPathItem, QGraphicsRectItem, QGraphicsEllipseItem,
+    QGraphicsTextItem, QGraphicsPolygonItem, QGraphicsPixmapItem,
+    {Graphics View Framework}
+*/
+
+class QGraphicsLineItemPrivate : public QGraphicsItemPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsLineItem)
+public:
+    QLineF line;
+    QPen pen;
+};
+
+/*!
+    Constructs a QGraphicsLineItem, using \a line as the default line. \a
+    parent is passed to QGraphicsItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsLineItem::QGraphicsLineItem(const QLineF &line, QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QGraphicsItem(*new QGraphicsLineItemPrivate, parent, scene)
+{
+    setLine(line);
+}
+
+/*!
+    Constructs a QGraphicsLineItem, using the line between (\a x1, \a y1) and
+    (\a x2, \a y2) as the default line.  \a parent is passed to
+    QGraphicsItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsLineItem::QGraphicsLineItem(qreal x1, qreal y1, qreal x2, qreal y2, QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QGraphicsItem(*new QGraphicsLineItemPrivate, parent, scene)
+{
+    setLine(x1, y1, x2, y2);
+}
+
+
+
+/*!
+    Constructs a QGraphicsLineItem. \a parent is passed to QGraphicsItem's
+    constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsLineItem::QGraphicsLineItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QGraphicsItem(*new QGraphicsLineItemPrivate, parent, scene)
+{
+}
+
+/*!
+    Destroys the QGraphicsLineItem.
+*/
+QGraphicsLineItem::~QGraphicsLineItem()
+{
+}
+
+/*!
+    Returns the item's pen, or a black solid 0-width pen if no pen has
+    been set.
+
+    \sa setPen()
+*/
+QPen QGraphicsLineItem::pen() const
+{
+    Q_D(const QGraphicsLineItem);
+    return d->pen;
+}
+
+/*!
+    Sets the item's pen to \a pen. If no pen is set, the line will be painted
+    using a black solid 0-width pen.
+
+    \sa pen()
+*/
+void QGraphicsLineItem::setPen(const QPen &pen)
+{
+    Q_D(QGraphicsLineItem);
+    if (d->pen == pen)
+        return;
+    prepareGeometryChange();
+    d->pen = pen;
+    update();
+}
+
+/*!
+    Returns the item's line, or a null line if no line has been set.
+
+    \sa setLine()
+*/
+QLineF QGraphicsLineItem::line() const
+{
+    Q_D(const QGraphicsLineItem);
+    return d->line;
+}
+
+/*!
+    Sets the item's line to be the given \a line.
+
+    \sa line()
+*/
+void QGraphicsLineItem::setLine(const QLineF &line)
+{
+    Q_D(QGraphicsLineItem);
+    if (d->line == line)
+        return;
+    prepareGeometryChange();
+    d->line = line;
+    update();
+}
+
+/*!
+    \fn void QGraphicsLineItem::setLine(qreal x1, qreal y1, qreal x2, qreal y2)
+    \overload
+
+    Sets the item's line to be the line between (\a x1, \a y1) and (\a
+    x2, \a y2).
+
+    This is the same as calling \c {setLine(QLineF(x1, y1, x2, y2))}.
+*/
+
+/*!
+    \reimp
+*/
+QRectF QGraphicsLineItem::boundingRect() const
+{
+    Q_D(const QGraphicsLineItem);
+    if (d->pen.widthF() == 0.0) {
+        const qreal x1 = d->line.p1().x();
+        const qreal x2 = d->line.p2().x();
+        const qreal y1 = d->line.p1().y();
+        const qreal y2 = d->line.p2().y();
+        qreal lx = qMin(x1, x2);
+        qreal rx = qMax(x1, x2);
+        qreal ty = qMin(y1, y2);
+        qreal by = qMax(y1, y2);
+        return QRectF(lx, ty, rx - lx, by - ty);
+    }
+    return shape().controlPointRect();
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsLineItem::shape() const
+{
+    Q_D(const QGraphicsLineItem);
+    QPainterPath path;
+    if (d->line == QLineF())
+        return path;
+
+    path.moveTo(d->line.p1());
+    path.lineTo(d->line.p2());
+    return qt_graphicsItem_shapeFromPath(path, d->pen);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsLineItem::contains(const QPointF &point) const
+{
+    return QGraphicsItem::contains(point);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsLineItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_D(QGraphicsLineItem);
+    Q_UNUSED(widget);
+    painter->setPen(d->pen);
+    painter->drawLine(d->line);
+
+    if (option->state & QStyle::State_Selected)
+        qt_graphicsItem_highlightSelected(this, painter, option);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsLineItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QGraphicsItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsLineItem::opaqueArea() const
+{
+    return QGraphicsItem::opaqueArea();
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsLineItem::type() const
+{
+    return Type;
+}
+
+/*!
+    \internal
+*/
+bool QGraphicsLineItem::supportsExtension(Extension extension) const
+{
+    Q_UNUSED(extension);
+    return false;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsLineItem::setExtension(Extension extension, const QVariant &variant)
+{
+    Q_UNUSED(extension);
+    Q_UNUSED(variant);
+}
+
+/*!
+    \internal
+*/
+QVariant QGraphicsLineItem::extension(const QVariant &variant) const
+{
+    Q_UNUSED(variant);
+    return QVariant();
+}
+
+/*!
+    \class QGraphicsPixmapItem
+    \brief The QGraphicsPixmapItem class provides a pixmap item that you can add to
+    a QGraphicsScene.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    To set the item's pixmap, pass a QPixmap to QGraphicsPixmapItem's
+    constructor, or call the setPixmap() function. The pixmap()
+    function returns the current pixmap.
+
+    QGraphicsPixmapItem uses pixmap's optional alpha mask to provide a
+    reasonable implementation of boundingRect(), shape(), and contains().
+
+    \image graphicsview-pixmapitem.png
+
+    The pixmap is drawn at the item's (0, 0) coordinate, as returned by
+    offset(). You can change the drawing offset by calling setOffset().
+
+    You can set the pixmap's transformation mode by calling
+    setTransformationMode(). By default, Qt::FastTransformation is used, which
+    provides fast, non-smooth scaling. Qt::SmoothTransformation enables
+    QPainter::SmoothPixmapTransform on the painter, and the quality depends on
+    the platform and viewport. The result is usually not as good as calling
+    QPixmap::scale() directly. Call transformationMode() to get the current
+    transformation mode for the item.
+
+    \sa QGraphicsPathItem, QGraphicsRectItem, QGraphicsEllipseItem,
+    QGraphicsTextItem, QGraphicsPolygonItem, QGraphicsLineItem,
+    {Graphics View Framework}
+*/
+
+/*!
+    \enum QGraphicsPixmapItem::ShapeMode
+
+    This enum describes how QGraphicsPixmapItem calculates its shape and
+    opaque area.
+
+    The default value is MaskShape.
+
+    \value MaskShape The shape is determined by calling QPixmap::mask().
+    This shape includes only the opaque pixels of the pixmap.
+    Because the shape is more complex, however, it can be slower than the other modes,
+    and uses more memory.
+
+    \value BoundingRectShape The shape is determined by tracing the outline of
+    the pixmap. This is the fastest shape mode, but it does not take into account
+    any transparent areas on the pixmap.
+
+    \value HeuristicMaskShape The shape is determine by calling
+    QPixmap::createHeuristicMask().  The performance and memory consumption
+    is similar to MaskShape.
+*/
+extern QPainterPath qt_regionToPath(const QRegion &region);
+
+class QGraphicsPixmapItemPrivate : public QGraphicsItemPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsPixmapItem)
+public:
+    QGraphicsPixmapItemPrivate()
+        : transformationMode(Qt::FastTransformation),
+        shapeMode(QGraphicsPixmapItem::MaskShape),
+        hasShape(false)
+    {}
+
+    QPixmap pixmap;
+    Qt::TransformationMode transformationMode;
+    QPointF offset;
+    QGraphicsPixmapItem::ShapeMode shapeMode;
+    QPainterPath shape;
+    bool hasShape;
+
+    void updateShape()
+    {
+        shape = QPainterPath();
+        switch (shapeMode) {
+        case QGraphicsPixmapItem::MaskShape: {
+            QBitmap mask = pixmap.mask();
+            if (!mask.isNull()) {
+                shape = qt_regionToPath(QRegion(mask).translated(offset.toPoint()));
+                break;
+            }
+            // FALL THROUGH
+        }
+        case QGraphicsPixmapItem::BoundingRectShape:
+            shape.addRect(QRectF(offset.x(), offset.y(), pixmap.width(), pixmap.height()));
+            break;
+        case QGraphicsPixmapItem::HeuristicMaskShape:
+#ifndef QT_NO_IMAGE_HEURISTIC_MASK
+            shape = qt_regionToPath(QRegion(pixmap.createHeuristicMask()).translated(offset.toPoint()));
+#else
+            shape.addRect(QRectF(offset.x(), offset.y(), pixmap.width(), pixmap.height()));
+#endif
+            break;
+        }
+    }
+};
+
+/*!
+    Constructs a QGraphicsPixmapItem, using \a pixmap as the default pixmap.
+    \a parent is passed to QGraphicsItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsPixmapItem::QGraphicsPixmapItem(const QPixmap &pixmap,
+                                         QGraphicsItem *parent
+#ifndef Q_QDOC
+                                         // obsolete argument
+                                         , QGraphicsScene *scene
+#endif
+    )
+    : QGraphicsItem(*new QGraphicsPixmapItemPrivate, parent, scene)
+{
+    setPixmap(pixmap);
+}
+
+/*!
+    Constructs a QGraphicsPixmapItem. \a parent is passed to QGraphicsItem's
+    constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsPixmapItem::QGraphicsPixmapItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                         // obsolete argument
+                                         , QGraphicsScene *scene
+#endif
+    )
+    : QGraphicsItem(*new QGraphicsPixmapItemPrivate, parent, scene)
+{
+}
+
+/*!
+    Destroys the QGraphicsPixmapItem.
+*/
+QGraphicsPixmapItem::~QGraphicsPixmapItem()
+{
+}
+
+/*!
+    Sets the item's pixmap to \a pixmap.
+
+    \sa pixmap()
+*/
+void QGraphicsPixmapItem::setPixmap(const QPixmap &pixmap)
+{
+    Q_D(QGraphicsPixmapItem);
+    prepareGeometryChange();
+    d->pixmap = pixmap;
+    d->hasShape = false;
+    update();
+}
+
+/*!
+    Returns the item's pixmap, or an invalid QPixmap if no pixmap has been
+    set.
+
+    \sa setPixmap()
+*/
+QPixmap QGraphicsPixmapItem::pixmap() const
+{
+    Q_D(const QGraphicsPixmapItem);
+    return d->pixmap;
+}
+
+/*!
+    Returns the transformation mode of the pixmap. The default mode is
+    Qt::FastTransformation, which provides quick transformation with no
+    smoothing.
+
+    \sa setTransformationMode()
+*/
+Qt::TransformationMode QGraphicsPixmapItem::transformationMode() const
+{
+    Q_D(const QGraphicsPixmapItem);
+    return d->transformationMode;
+}
+
+/*!
+    Sets the pixmap item's transformation mode to \a mode, and toggles an
+    update of the item. The default mode is Qt::FastTransformation, which
+    provides quick transformation with no smoothing.
+
+    Qt::SmoothTransformation enables QPainter::SmoothPixmapTransform on the
+    painter, and the quality depends on the platform and viewport. The result
+    is usually not as good as calling QPixmap::scale() directly.
+
+    \sa transformationMode()
+*/
+void QGraphicsPixmapItem::setTransformationMode(Qt::TransformationMode mode)
+{
+    Q_D(QGraphicsPixmapItem);
+    if (mode != d->transformationMode) {
+        d->transformationMode = mode;
+        update();
+    }
+}
+
+/*!
+    Returns the pixmap item's \e offset, which defines the point of the
+    top-left corner of the pixmap, in local coordinates.
+
+    \sa setOffset()
+*/
+QPointF QGraphicsPixmapItem::offset() const
+{
+    Q_D(const QGraphicsPixmapItem);
+    return d->offset;
+}
+
+/*!
+    Sets the pixmap item's offset to \a offset. QGraphicsPixmapItem will draw
+    its pixmap using \a offset for its top-left corner.
+
+    \sa offset()
+*/
+void QGraphicsPixmapItem::setOffset(const QPointF &offset)
+{
+    Q_D(QGraphicsPixmapItem);
+    if (d->offset == offset)
+        return;
+    prepareGeometryChange();
+    d->offset = offset;
+    d->hasShape = false;
+    update();
+}
+
+/*!
+    \fn void QGraphicsPixmapItem::setOffset(qreal x, qreal y)
+    \since 4.3
+
+    This convenience function is equivalent to calling setOffset(QPointF(\a x, \a y)).
+*/
+
+/*!
+    \reimp
+*/
+QRectF QGraphicsPixmapItem::boundingRect() const
+{
+    Q_D(const QGraphicsPixmapItem);
+    if (d->pixmap.isNull())
+        return QRectF();
+    if (d->flags & ItemIsSelectable) {
+        qreal pw = 1.0;
+        return QRectF(d->offset, d->pixmap.size()).adjusted(-pw/2, -pw/2, pw/2, pw/2);
+    } else {
+        return QRectF(d->offset, d->pixmap.size());
+    }
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsPixmapItem::shape() const
+{
+    Q_D(const QGraphicsPixmapItem);
+    if (!d->hasShape) {
+        QGraphicsPixmapItemPrivate *thatD = const_cast<QGraphicsPixmapItemPrivate *>(d);
+        thatD->updateShape();
+        thatD->hasShape = true;
+    }
+    return d_func()->shape;
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsPixmapItem::contains(const QPointF &point) const
+{
+    return QGraphicsItem::contains(point);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsPixmapItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+                                QWidget *widget)
+{
+    Q_D(QGraphicsPixmapItem);
+    Q_UNUSED(widget);
+
+    painter->setRenderHint(QPainter::SmoothPixmapTransform,
+                           (d->transformationMode == Qt::SmoothTransformation));
+
+    painter->drawPixmap(d->offset, d->pixmap);
+
+    if (option->state & QStyle::State_Selected)
+        qt_graphicsItem_highlightSelected(this, painter, option);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsPixmapItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QGraphicsItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsPixmapItem::opaqueArea() const
+{
+    return shape();
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsPixmapItem::type() const
+{
+    return Type;
+}
+
+/*!
+    Returns the item's shape mode. The shape mode describes how
+    QGraphicsPixmapItem calculates its shape. The default mode is MaskShape.
+
+    \sa setShapeMode(), ShapeMode
+*/
+QGraphicsPixmapItem::ShapeMode QGraphicsPixmapItem::shapeMode() const
+{
+    return d_func()->shapeMode;
+}
+
+/*!
+    Sets the item's shape mode to \a mode. The shape mode describes how
+    QGraphicsPixmapItem calculates its shape. The default mode is MaskShape.
+
+    \sa shapeMode(), ShapeMode
+*/
+void QGraphicsPixmapItem::setShapeMode(ShapeMode mode)
+{
+    Q_D(QGraphicsPixmapItem);
+    if (d->shapeMode == mode)
+        return;
+    d->shapeMode = mode;
+    d->hasShape = false;
+}
+
+/*!
+    \internal
+*/
+bool QGraphicsPixmapItem::supportsExtension(Extension extension) const
+{
+    Q_UNUSED(extension);
+    return false;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsPixmapItem::setExtension(Extension extension, const QVariant &variant)
+{
+    Q_UNUSED(extension);
+    Q_UNUSED(variant);
+}
+
+/*!
+    \internal
+*/
+QVariant QGraphicsPixmapItem::extension(const QVariant &variant) const
+{
+    Q_UNUSED(variant);
+    return QVariant();
+}
+
+/*!
+    \class QGraphicsTextItem
+    \brief The QGraphicsTextItem class provides a text item that you can add to
+    a QGraphicsScene to display formatted text.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    If you only need to show plain text in an item, consider using QGraphicsSimpleTextItem
+    instead.
+
+    To set the item's text, pass a QString to QGraphicsTextItem's
+    constructor, or call setHtml()/setPlainText().
+
+    QGraphicsTextItem uses the text's formatted size and the associated font
+    to provide a reasonable implementation of boundingRect(), shape(),
+    and contains(). You can set the font by calling setFont().
+
+    It is possible to make the item editable by setting the Qt::TextEditorInteraction flag
+    using setTextInteractionFlags().
+
+    The item's preferred text width can be set using setTextWidth() and obtained
+    using textWidth().
+
+    \note In order to align HTML text in the center, the item's text width must be set.
+
+    \img graphicsview-textitem.png
+
+    \note QGraphicsTextItem accepts \l{QGraphicsItem::acceptHoverEvents()}{hover events}
+          by default. You can change this with \l{QGraphicsItem::}{setAcceptHoverEvents()}.
+
+    \sa QGraphicsSimpleTextItem, QGraphicsPathItem, QGraphicsRectItem,
+        QGraphicsEllipseItem, QGraphicsPixmapItem, QGraphicsPolygonItem,
+        QGraphicsLineItem, {Graphics View Framework}
+*/
+
+class QGraphicsTextItemPrivate
+{
+public:
+    QGraphicsTextItemPrivate()
+        : control(0), pageNumber(0), useDefaultImpl(false), tabChangesFocus(false), clickCausedFocus(0)
+    { }
+
+    mutable QTextControl *control;
+    QTextControl *textControl() const;
+
+    inline QPointF controlOffset() const
+    { return QPointF(0., pageNumber * control->document()->pageSize().height()); }
+    inline void sendControlEvent(QEvent *e)
+    { if (control) control->processEvent(e, controlOffset()); }
+
+    void _q_updateBoundingRect(const QSizeF &);
+    void _q_update(QRectF);
+    void _q_ensureVisible(QRectF);
+    bool _q_mouseOnEdge(QGraphicsSceneMouseEvent *);
+
+    QRectF boundingRect;
+    int pageNumber;
+    bool useDefaultImpl;
+    bool tabChangesFocus;
+
+    uint clickCausedFocus : 1;
+
+    QGraphicsTextItem *qq;
+};
+
+
+/*!
+    Constructs a QGraphicsTextItem, using \a text as the default plain
+    text. \a parent is passed to QGraphicsItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsTextItem::QGraphicsTextItem(const QString &text, QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QGraphicsObject(*new QGraphicsItemPrivate, parent, scene), dd(new QGraphicsTextItemPrivate)
+{
+    dd->qq = this;
+    if (!text.isEmpty())
+        setPlainText(text);
+    setAcceptDrops(true);
+    setAcceptHoverEvents(true);
+    setFlags(ItemUsesExtendedStyleOption);
+}
+
+/*!
+    Constructs a QGraphicsTextItem. \a parent is passed to QGraphicsItem's
+    constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsTextItem::QGraphicsTextItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                     // obsolete argument
+                                     , QGraphicsScene *scene
+#endif
+    )
+    : QGraphicsObject(*new QGraphicsItemPrivate, parent, scene), dd(new QGraphicsTextItemPrivate)
+{
+    dd->qq = this;
+    setAcceptDrops(true);
+    setAcceptHoverEvents(true);
+    setFlag(ItemUsesExtendedStyleOption);
+}
+
+/*!
+    Destroys the QGraphicsTextItem.
+*/
+QGraphicsTextItem::~QGraphicsTextItem()
+{
+    delete dd;
+}
+
+/*!
+    Returns the item's text converted to HTML, or an empty QString if no text has been set.
+
+    \sa setHtml()
+*/
+QString QGraphicsTextItem::toHtml() const
+{
+#ifndef QT_NO_TEXTHTMLPARSER
+    if (dd->control)
+        return dd->control->toHtml();
+#endif
+    return QString();
+}
+
+/*!
+    Sets the item's text to \a text, assuming that text is HTML formatted. If
+    the item has keyboard input focus, this function will also call
+    ensureVisible() to ensure that the text is visible in all viewports.
+
+    \sa toHtml(), hasFocus(), QGraphicsSimpleTextItem
+*/
+void QGraphicsTextItem::setHtml(const QString &text)
+{
+    dd->textControl()->setHtml(text);
+}
+
+/*!
+    Returns the item's text converted to plain text, or an empty QString if no text has been set.
+
+    \sa setPlainText()
+*/
+QString QGraphicsTextItem::toPlainText() const
+{
+    if (dd->control)
+        return dd->control->toPlainText();
+    return QString();
+}
+
+/*!
+    Sets the item's text to \a text. If the item has keyboard input focus,
+    this function will also call ensureVisible() to ensure that the text is
+    visible in all viewports.
+
+    \sa toHtml(), hasFocus()
+*/
+void QGraphicsTextItem::setPlainText(const QString &text)
+{
+    dd->textControl()->setPlainText(text);
+}
+
+/*!
+    Returns the item's font, which is used to render the text.
+
+    \sa setFont()
+*/
+QFont QGraphicsTextItem::font() const
+{
+    if (!dd->control)
+        return QFont();
+    return dd->control->document()->defaultFont();
+}
+
+/*!
+    Sets the font used to render the text item to \a font.
+
+    \sa font()
+*/
+void QGraphicsTextItem::setFont(const QFont &font)
+{
+    dd->textControl()->document()->setDefaultFont(font);
+}
+
+/*!
+    Sets the color for unformatted text to \a col.
+*/
+void QGraphicsTextItem::setDefaultTextColor(const QColor &col)
+{
+    QTextControl *c = dd->textControl();
+    QPalette pal = c->palette();
+    QColor old = pal.color(QPalette::Text);
+    pal.setColor(QPalette::Text, col);
+    c->setPalette(pal);
+    if (old != col)
+        update();
+}
+
+/*!
+    Returns the default text color that is used to for unformatted text.
+*/
+QColor QGraphicsTextItem::defaultTextColor() const
+{
+    return dd->textControl()->palette().color(QPalette::Text);
+}
+
+/*!
+    \reimp
+*/
+QRectF QGraphicsTextItem::boundingRect() const
+{
+    return dd->boundingRect;
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsTextItem::shape() const
+{
+    if (!dd->control)
+        return QPainterPath();
+    QPainterPath path;
+    path.addRect(dd->boundingRect);
+    return path;
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsTextItem::contains(const QPointF &point) const
+{
+    return dd->boundingRect.contains(point);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+                              QWidget *widget)
+{
+    Q_UNUSED(widget);
+    if (dd->control) {
+        painter->save();
+        QRectF r = option->exposedRect;
+        painter->translate(-dd->controlOffset());
+        r.translate(dd->controlOffset());
+
+        QTextDocument *doc = dd->control->document();
+        QTextDocumentLayout *layout = qobject_cast<QTextDocumentLayout *>(doc->documentLayout());
+
+        // the layout might need to expand the root frame to
+        // the viewport if NoWrap is set
+        if (layout)
+            layout->setViewport(dd->boundingRect);
+
+        dd->control->drawContents(painter, r);
+
+        if (layout)
+            layout->setViewport(QRect());
+
+        painter->restore();
+    }
+
+    if (option->state & (QStyle::State_Selected | QStyle::State_HasFocus))
+        qt_graphicsItem_highlightSelected(this, painter, option);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsTextItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QGraphicsItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsTextItem::opaqueArea() const
+{
+    return QGraphicsItem::opaqueArea();
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsTextItem::type() const
+{
+    return Type;
+}
+
+/*!
+    Sets the preferred width for the item's text. If the actual text
+    is wider than the specified width then it will be broken into
+    multiple lines.
+
+    If \a width is set to -1 then the text will not be broken into
+    multiple lines unless it is enforced through an explicit line
+    break or a new paragraph.
+
+    The default value is -1.
+
+    Note that QGraphicsTextItem keeps a QTextDocument internally,
+    which is used to calculate the text width.
+
+    \sa textWidth(), QTextDocument::setTextWidth()
+*/
+void QGraphicsTextItem::setTextWidth(qreal width)
+{
+    dd->textControl()->setTextWidth(width);
+}
+
+/*!
+    Returns the text width.
+
+    The width is calculated with the QTextDocument that
+    QGraphicsTextItem keeps internally.
+
+    \sa setTextWidth(), QTextDocument::textWidth()
+*/
+qreal QGraphicsTextItem::textWidth() const
+{
+    if (!dd->control)
+        return -1;
+    return dd->control->textWidth();
+}
+
+/*!
+    Adjusts the text item to a reasonable size.
+*/
+void QGraphicsTextItem::adjustSize()
+{
+    if (dd->control)
+        dd->control->adjustSize();
+}
+
+/*!
+    Sets the text document \a document on the item.
+*/
+void QGraphicsTextItem::setDocument(QTextDocument *document)
+{
+    dd->textControl()->setDocument(document);
+    dd->_q_updateBoundingRect(dd->control->size());
+}
+
+/*!
+    Returns the item's text document.
+*/
+QTextDocument *QGraphicsTextItem::document() const
+{
+    return dd->textControl()->document();
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsTextItem::sceneEvent(QEvent *event)
+{
+    QEvent::Type t = event->type();
+    if (!dd->tabChangesFocus && (t == QEvent::KeyPress || t == QEvent::KeyRelease)) {
+        int k = ((QKeyEvent *)event)->key();
+        if (k == Qt::Key_Tab || k == Qt::Key_Backtab) {
+            dd->sendControlEvent(event);
+            return true;
+        }
+    }
+    bool result = QGraphicsItem::sceneEvent(event);
+
+    // Ensure input context is updated.
+    switch (event->type()) {
+    case QEvent::ContextMenu:
+    case QEvent::FocusIn:
+    case QEvent::FocusOut:
+    case QEvent::GraphicsSceneDragEnter:
+    case QEvent::GraphicsSceneDragLeave:
+    case QEvent::GraphicsSceneDragMove:
+    case QEvent::GraphicsSceneDrop:
+    case QEvent::GraphicsSceneHoverEnter:
+    case QEvent::GraphicsSceneHoverLeave:
+    case QEvent::GraphicsSceneHoverMove:
+    case QEvent::GraphicsSceneMouseDoubleClick:
+    case QEvent::GraphicsSceneMousePress:
+    case QEvent::GraphicsSceneMouseMove:
+    case QEvent::GraphicsSceneMouseRelease:
+    case QEvent::KeyPress:
+    case QEvent::KeyRelease:
+        // Reset the focus widget's input context, regardless
+        // of how this item gained or lost focus.
+        if (QWidget *fw = qApp->focusWidget()) {
+#ifndef QT_NO_IM
+            if (QInputContext *qic = fw->inputContext()) {
+                if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut)
+                    qic->reset();
+                else
+                    qic->update();
+            }
+#endif //QT_NO_IM
+        }
+        break;
+    case QEvent::ShortcutOverride:
+        dd->sendControlEvent(event);
+        return true;
+    default:
+        break;
+    }
+
+    return result;
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    if ((QGraphicsItem::d_ptr->flags & (ItemIsSelectable | ItemIsMovable))
+        && (event->buttons() & Qt::LeftButton) && dd->_q_mouseOnEdge(event)) {
+        // User left-pressed on edge of selectable/movable item, use
+        // base impl.
+        dd->useDefaultImpl = true;
+    } else if (event->buttons() == event->button()
+               && dd->control->textInteractionFlags() == Qt::NoTextInteraction) {
+        // User pressed first button on non-interactive item.
+        dd->useDefaultImpl = true;
+    }
+    if (dd->useDefaultImpl) {
+        QGraphicsItem::mousePressEvent(event);
+        if (!event->isAccepted())
+            dd->useDefaultImpl = false;
+        return;
+    }
+
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (dd->useDefaultImpl) {
+        QGraphicsItem::mouseMoveEvent(event);
+        return;
+    }
+
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (dd->useDefaultImpl) {
+        QGraphicsItem::mouseReleaseEvent(event);
+        if (dd->control->textInteractionFlags() == Qt::NoTextInteraction
+            && !event->buttons()) {
+            // User released last button on non-interactive item.
+            dd->useDefaultImpl = false;
+        } else  if ((event->buttons() & Qt::LeftButton) == 0) {
+            // User released the left button on an interactive item.
+            dd->useDefaultImpl = false;
+        }
+        return;
+    }
+
+    QWidget *widget = event->widget();
+    if (widget && (dd->control->textInteractionFlags() & Qt::TextEditable) && boundingRect().contains(event->pos())) {
+        qt_widget_private(widget)->handleSoftwareInputPanel(event->button(), dd->clickCausedFocus);
+    }
+    dd->clickCausedFocus = 0;
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
+{
+    if (dd->useDefaultImpl) {
+        QGraphicsItem::mouseDoubleClickEvent(event);
+        return;
+    }
+
+    if (!hasFocus()) {
+        QGraphicsItem::mouseDoubleClickEvent(event);
+        return;
+    }
+
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::keyPressEvent(QKeyEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::keyReleaseEvent(QKeyEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::focusInEvent(QFocusEvent *event)
+{
+    dd->sendControlEvent(event);
+    if (event->reason() == Qt::MouseFocusReason) {
+        dd->clickCausedFocus = 1;
+    }
+    update();
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::focusOutEvent(QFocusEvent *event)
+{
+    dd->sendControlEvent(event);
+    update();
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::dragMoveEvent(QGraphicsSceneDragDropEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::dropEvent(QGraphicsSceneDragDropEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::inputMethodEvent(QInputMethodEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsTextItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
+{
+    dd->sendControlEvent(event);
+}
+
+/*!
+    \reimp
+*/
+QVariant QGraphicsTextItem::inputMethodQuery(Qt::InputMethodQuery query) const
+{
+    QVariant v;
+    if (dd->control)
+        v = dd->control->inputMethodQuery(query);
+    if (v.type() == QVariant::RectF)
+        v = v.toRectF().translated(-dd->controlOffset());
+    else if (v.type() == QVariant::PointF)
+        v = v.toPointF() - dd->controlOffset();
+    else if (v.type() == QVariant::Rect)
+        v = v.toRect().translated(-dd->controlOffset().toPoint());
+    else if (v.type() == QVariant::Point)
+        v = v.toPoint() - dd->controlOffset().toPoint();
+    return v;
+}
+
+/*!
+    \internal
+*/
+bool QGraphicsTextItem::supportsExtension(Extension extension) const
+{
+    Q_UNUSED(extension);
+    return false;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsTextItem::setExtension(Extension extension, const QVariant &variant)
+{
+    Q_UNUSED(extension);
+    Q_UNUSED(variant);
+}
+
+/*!
+    \internal
+*/
+QVariant QGraphicsTextItem::extension(const QVariant &variant) const
+{
+    Q_UNUSED(variant);
+    return QVariant();
+}
+
+/*!
+    \internal
+*/
+void QGraphicsTextItemPrivate::_q_update(QRectF rect)
+{
+    if (rect.isValid()) {
+        rect.translate(-controlOffset());
+    } else {
+        rect = boundingRect;
+    }
+    if (rect.intersects(boundingRect))
+        qq->update(rect);
+}
+
+/*!
+    \internal
+*/
+void QGraphicsTextItemPrivate::_q_updateBoundingRect(const QSizeF &size)
+{
+    if (!control) return; // can't happen
+    const QSizeF pageSize = control->document()->pageSize();
+    // paged items have a constant (page) size
+    if (size == boundingRect.size() || pageSize.height() != -1)
+        return;
+    qq->prepareGeometryChange();
+    boundingRect.setSize(size);
+    qq->update();
+}
+
+/*!
+    \internal
+*/
+void QGraphicsTextItemPrivate::_q_ensureVisible(QRectF rect)
+{
+    if (qq->hasFocus()) {
+        rect.translate(-controlOffset());
+        qq->ensureVisible(rect, /*xmargin=*/0, /*ymargin=*/0);
+    }
+}
+
+QTextControl *QGraphicsTextItemPrivate::textControl() const
+{
+    if (!control) {
+        QGraphicsTextItem *that = const_cast<QGraphicsTextItem *>(qq);
+        control = new QTextControl(that);
+        control->setTextInteractionFlags(Qt::NoTextInteraction);
+
+        QObject::connect(control, SIGNAL(updateRequest(QRectF)),
+                         qq, SLOT(_q_update(QRectF)));
+        QObject::connect(control, SIGNAL(documentSizeChanged(QSizeF)),
+                         qq, SLOT(_q_updateBoundingRect(QSizeF)));
+        QObject::connect(control, SIGNAL(visibilityRequest(QRectF)),
+                         qq, SLOT(_q_ensureVisible(QRectF)));
+        QObject::connect(control, SIGNAL(linkActivated(QString)),
+                         qq, SIGNAL(linkActivated(QString)));
+        QObject::connect(control, SIGNAL(linkHovered(QString)),
+                         qq, SIGNAL(linkHovered(QString)));
+
+        const QSizeF pgSize = control->document()->pageSize();
+        if (pgSize.height() != -1) {
+            qq->prepareGeometryChange();
+            that->dd->boundingRect.setSize(pgSize);
+            qq->update();
+        } else {
+            that->dd->_q_updateBoundingRect(control->size());
+        }
+    }
+    return control;
+}
+
+/*!
+    \internal
+*/
+bool QGraphicsTextItemPrivate::_q_mouseOnEdge(QGraphicsSceneMouseEvent *event)
+{
+    QPainterPath path;
+    path.addRect(qq->boundingRect());
+
+    QPainterPath docPath;
+    const QTextFrameFormat format = control->document()->rootFrame()->frameFormat();
+    docPath.addRect(
+        qq->boundingRect().adjusted(
+            format.leftMargin(),
+            format.topMargin(),
+            -format.rightMargin(),
+            -format.bottomMargin()));
+
+    return path.subtracted(docPath).contains(event->pos());
+}
+
+/*!
+    \fn QGraphicsTextItem::linkActivated(const QString &link)
+
+    This signal is emitted when the user clicks on a link on a text item
+    that enables Qt::LinksAccessibleByMouse or Qt::LinksAccessibleByKeyboard.
+    \a link is the link that was clicked.
+
+    \sa setTextInteractionFlags()
+*/
+
+/*!
+    \fn QGraphicsTextItem::linkHovered(const QString &link)
+
+    This signal is emitted when the user hovers over a link on a text item
+    that enables Qt::LinksAccessibleByMouse. \a link is
+    the link that was hovered over.
+
+    \sa setTextInteractionFlags()
+*/
+
+/*!
+    Sets the flags \a flags to specify how the text item should react to user
+    input.
+
+    The default for a QGraphicsTextItem is Qt::NoTextInteraction. This function
+    also affects the ItemIsFocusable QGraphicsItem flag by setting it if \a flags
+    is different from Qt::NoTextInteraction and clearing it otherwise.
+
+    By default, the text is read-only. To transform the item into an editor,
+    set the Qt::TextEditable flag.
+*/
+void QGraphicsTextItem::setTextInteractionFlags(Qt::TextInteractionFlags flags)
+{
+    if (flags == Qt::NoTextInteraction)
+        setFlags(this->flags() & ~(QGraphicsItem::ItemIsFocusable | QGraphicsItem::ItemAcceptsInputMethod));
+    else
+        setFlags(this->flags() | QGraphicsItem::ItemIsFocusable | QGraphicsItem::ItemAcceptsInputMethod);
+
+    dd->textControl()->setTextInteractionFlags(flags);
+}
+
+/*!
+    Returns the current text interaction flags.
+
+    \sa setTextInteractionFlags()
+*/
+Qt::TextInteractionFlags QGraphicsTextItem::textInteractionFlags() const
+{
+    if (!dd->control)
+        return Qt::NoTextInteraction;
+    return dd->control->textInteractionFlags();
+}
+
+/*!
+    \since 4.5
+
+    If \a b is true, the \gui Tab key will cause the widget to change focus;
+    otherwise, the tab key will insert a tab into the document.
+
+    In some occasions text edits should not allow the user to input tabulators
+    or change indentation using the \gui Tab key, as this breaks the focus
+    chain. The default is false.
+
+    \sa tabChangesFocus(), ItemIsFocusable, textInteractionFlags()
+*/
+void QGraphicsTextItem::setTabChangesFocus(bool b)
+{
+    dd->tabChangesFocus = b;
+}
+
+/*!
+    \since 4.5
+
+    Returns true if the \gui Tab key will cause the widget to change focus;
+    otherwise, false is returned.
+
+    By default, this behavior is disabled, and this function will return false.
+
+    \sa setTabChangesFocus()
+*/
+bool QGraphicsTextItem::tabChangesFocus() const
+{
+    return dd->tabChangesFocus;
+}
+
+/*!
+    \property QGraphicsTextItem::openExternalLinks
+
+    Specifies whether QGraphicsTextItem should automatically open links using
+    QDesktopServices::openUrl() instead of emitting the
+    linkActivated signal.
+
+    The default value is false.
+*/
+void QGraphicsTextItem::setOpenExternalLinks(bool open)
+{
+    dd->textControl()->setOpenExternalLinks(open);
+}
+
+bool QGraphicsTextItem::openExternalLinks() const
+{
+    if (!dd->control)
+        return false;
+    return dd->control->openExternalLinks();
+}
+
+/*!
+    \property QGraphicsTextItem::textCursor
+
+    This property represents the visible text cursor in an editable
+    text item.
+
+    By default, if the item's text has not been set, this property
+    contains a null text cursor; otherwise it contains a text cursor
+    placed at the start of the item's document.
+*/
+void QGraphicsTextItem::setTextCursor(const QTextCursor &cursor)
+{
+    dd->textControl()->setTextCursor(cursor);
+}
+
+QTextCursor QGraphicsTextItem::textCursor() const
+{
+    if (!dd->control)
+        return QTextCursor();
+    return dd->control->textCursor();
+}
+
+class QGraphicsSimpleTextItemPrivate : public QAbstractGraphicsShapeItemPrivate
+{
+    Q_DECLARE_PUBLIC(QGraphicsSimpleTextItem)
+public:
+    inline QGraphicsSimpleTextItemPrivate() {
+        pen.setStyle(Qt::NoPen);
+        brush.setStyle(Qt::SolidPattern);
+    }
+    QString text;
+    QFont font;
+    QRectF boundingRect;
+
+    void updateBoundingRect();
+};
+
+static QRectF setupTextLayout(QTextLayout *layout)
+{
+    layout->setCacheEnabled(true);
+    layout->beginLayout();
+    while (layout->createLine().isValid())
+        ;
+    layout->endLayout();
+    qreal maxWidth = 0;
+    qreal y = 0;
+    for (int i = 0; i < layout->lineCount(); ++i) {
+        QTextLine line = layout->lineAt(i);
+        maxWidth = qMax(maxWidth, line.naturalTextWidth());
+        line.setPosition(QPointF(0, y));
+        y += line.height();
+    }
+    return QRectF(0, 0, maxWidth, y);
+}
+
+void QGraphicsSimpleTextItemPrivate::updateBoundingRect()
+{
+    Q_Q(QGraphicsSimpleTextItem);
+    QRectF br;
+    if (text.isEmpty()) {
+        br = QRectF();
+    } else {
+        QString tmp = text;
+        tmp.replace(QLatin1Char('\n'), QChar::LineSeparator);
+        QStackTextEngine engine(tmp, font);
+        QTextLayout layout(&engine);
+        br = setupTextLayout(&layout);
+    }
+    if (br != boundingRect) {
+        q->prepareGeometryChange();
+        boundingRect = br;
+        q->update();
+    }
+}
+
+/*!
+    \class QGraphicsSimpleTextItem
+    \brief The QGraphicsSimpleTextItem class provides a simple text path item
+    that you can add to a QGraphicsScene.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    To set the item's text, you can either pass a QString to
+    QGraphicsSimpleTextItem's constructor, or call setText() to change the
+    text later. To set the text fill color, call setBrush().
+
+    The simple text item can have both a fill and an outline; setBrush() will
+    set the text fill (i.e., text color), and setPen() sets the pen that will
+    be used to draw the text outline. (The latter can be slow, especially for
+    complex pens, and items with long text content.) If all you want is to
+    draw a simple line of text, you should call setBrush() only, and leave the
+    pen unset; QGraphicsSimpleTextItem's pen is by default Qt::NoPen.
+
+    QGraphicsSimpleTextItem uses the text's formatted size and the associated
+    font to provide a reasonable implementation of boundingRect(), shape(),
+    and contains(). You can set the font by calling setFont().
+
+    QGraphicsSimpleText does not display rich text; instead, you can use
+    QGraphicsTextItem, which provides full text control capabilities.
+
+    \img graphicsview-simpletextitem.png
+
+    \sa QGraphicsTextItem, QGraphicsPathItem, QGraphicsRectItem,
+    QGraphicsEllipseItem, QGraphicsPixmapItem, QGraphicsPolygonItem,
+    QGraphicsLineItem, {Graphics View Framework}
+*/
+
+/*!
+    Constructs a QGraphicsSimpleTextItem.
+
+    \a parent is passed to QGraphicsItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsSimpleTextItem::QGraphicsSimpleTextItem(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                                 // obsolete argument
+                                                 , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsSimpleTextItemPrivate, parent, scene)
+{
+}
+
+/*!
+    Constructs a QGraphicsSimpleTextItem, using \a text as the default plain text.
+
+    \a parent is passed to QGraphicsItem's constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsSimpleTextItem::QGraphicsSimpleTextItem(const QString &text, QGraphicsItem *parent
+#ifndef Q_QDOC
+                                                 // obsolete argument
+                                                 , QGraphicsScene *scene
+#endif
+    )
+    : QAbstractGraphicsShapeItem(*new QGraphicsSimpleTextItemPrivate, parent, scene)
+{
+    setText(text);
+}
+
+/*!
+    Destroys the QGraphicsSimpleTextItem.
+*/
+QGraphicsSimpleTextItem::~QGraphicsSimpleTextItem()
+{
+}
+
+/*!
+    Sets the item's text to \a text. The text will be displayed as
+    plain text. Newline characters ('\n') as well as characters of
+    type QChar::LineSeparator will cause item to break the text into
+    multiple lines.
+*/
+void QGraphicsSimpleTextItem::setText(const QString &text)
+{
+    Q_D(QGraphicsSimpleTextItem);
+    if (d->text == text)
+        return;
+    d->text = text;
+    d->updateBoundingRect();
+    update();
+}
+
+/*!
+    Returns the item's text.
+*/
+QString QGraphicsSimpleTextItem::text() const
+{
+    Q_D(const QGraphicsSimpleTextItem);
+    return d->text;
+}
+
+/*!
+    Sets the font that is used to draw the item's text to \a font.
+*/
+void QGraphicsSimpleTextItem::setFont(const QFont &font)
+{
+    Q_D(QGraphicsSimpleTextItem);
+    d->font = font;
+    d->updateBoundingRect();
+}
+
+/*!
+    Returns the font that is used to draw the item's text.
+*/
+QFont QGraphicsSimpleTextItem::font() const
+{
+    Q_D(const QGraphicsSimpleTextItem);
+    return d->font;
+}
+
+/*!
+    \reimp
+*/
+QRectF QGraphicsSimpleTextItem::boundingRect() const
+{
+    Q_D(const QGraphicsSimpleTextItem);
+    return d->boundingRect;
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsSimpleTextItem::shape() const
+{
+    Q_D(const QGraphicsSimpleTextItem);
+    QPainterPath path;
+    path.addRect(d->boundingRect);
+    return path;
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsSimpleTextItem::contains(const QPointF &point) const
+{
+    Q_D(const QGraphicsSimpleTextItem);
+    return d->boundingRect.contains(point);
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsSimpleTextItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(widget);
+    Q_D(QGraphicsSimpleTextItem);
+
+    painter->setFont(d->font);
+
+    QString tmp = d->text;
+    tmp.replace(QLatin1Char('\n'), QChar::LineSeparator);
+    QStackTextEngine engine(tmp, d->font);
+    QTextLayout layout(&engine);
+    setupTextLayout(&layout);
+
+    QPen p;
+    p.setBrush(d->brush);
+    painter->setPen(p);
+    if (d->pen.style() == Qt::NoPen && d->brush.style() == Qt::SolidPattern) {
+        painter->setBrush(Qt::NoBrush);
+    } else {
+        QTextLayout::FormatRange range;
+        range.start = 0;
+        range.length = layout.text().length();
+        range.format.setTextOutline(d->pen);
+        QList<QTextLayout::FormatRange> formats;
+        formats.append(range);
+        layout.setAdditionalFormats(formats);
+    }
+
+    layout.draw(painter, QPointF(0, 0));
+
+    if (option->state & (QStyle::State_Selected | QStyle::State_HasFocus))
+        qt_graphicsItem_highlightSelected(this, painter, option);
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsSimpleTextItem::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QAbstractGraphicsShapeItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsSimpleTextItem::opaqueArea() const
+{
+    return QAbstractGraphicsShapeItem::opaqueArea();
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsSimpleTextItem::type() const
+{
+    return Type;
+}
+
+/*!
+    \internal
+*/
+bool QGraphicsSimpleTextItem::supportsExtension(Extension extension) const
+{
+    Q_UNUSED(extension);
+    return false;
+}
+
+/*!
+    \internal
+*/
+void QGraphicsSimpleTextItem::setExtension(Extension extension, const QVariant &variant)
+{
+    Q_UNUSED(extension);
+    Q_UNUSED(variant);
+}
+
+/*!
+    \internal
+*/
+QVariant QGraphicsSimpleTextItem::extension(const QVariant &variant) const
+{
+    Q_UNUSED(variant);
+    return QVariant();
+}
+
+/*!
+    \class QGraphicsItemGroup
+    \brief The QGraphicsItemGroup class provides a container that treats
+    a group of items as a single item.
+    \since 4.2
+    \ingroup graphicsview-api
+
+    A QGraphicsItemGroup is a special type of compound item that
+    treats itself and all its children as one item (i.e., all events
+    and geometries for all children are merged together). It's common
+    to use item groups in presentation tools, when the user wants to
+    group several smaller items into one big item in order to simplify
+    moving and copying of items.
+
+    If all you want is to store items inside other items, you can use
+    any QGraphicsItem directly by passing a suitable parent to
+    setParentItem().
+
+    The boundingRect() function of QGraphicsItemGroup returns the
+    bounding rectangle of all items in the item group.
+    QGraphicsItemGroup ignores the ItemIgnoresTransformations flag on
+    its children (i.e., with respect to the geometry of the group
+    item, the children are treated as if they were transformable).
+
+    There are two ways to construct an item group. The easiest and
+    most common approach is to pass a list of items (e.g., all
+    selected items) to QGraphicsScene::createItemGroup(), which
+    returns a new QGraphicsItemGroup item. The other approach is to
+    manually construct a QGraphicsItemGroup item, add it to the scene
+    calling QGraphicsScene::addItem(), and then add items to the group
+    manually, one at a time by calling addToGroup(). To dismantle
+    ("ungroup") an item group, you can either call
+    QGraphicsScene::destroyItemGroup(), or you can manually remove all
+    items from the group by calling removeFromGroup().
+
+    \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 17
+
+    The operation of adding and removing items preserves the items'
+    scene-relative position and transformation, as opposed to calling
+    setParentItem(), where only the child item's parent-relative
+    position and transformation are kept.
+
+    The addtoGroup() function reparents the target item to this item
+    group, keeping the item's position and transformation intact
+    relative to the scene. Visually, this means that items added via
+    addToGroup() will remain completely unchanged as a result of this
+    operation, regardless of the item or the group's current position
+    or transformation; although the item's position and matrix are
+    likely to change.
+
+    The removeFromGroup() function has similar semantics to
+    setParentItem(); it reparents the item to the parent item of the
+    item group. As with addToGroup(), the item's scene-relative
+    position and transformation remain intact.
+
+    \sa QGraphicsItem, {Graphics View Framework}
+*/
+
+class QGraphicsItemGroupPrivate : public QGraphicsItemPrivate
+{
+public:
+    QRectF itemsBoundingRect;
+};
+
+/*!
+    Constructs a QGraphicsItemGroup. \a parent is passed to QGraphicsItem's
+    constructor.
+
+    \sa QGraphicsScene::addItem()
+*/
+QGraphicsItemGroup::QGraphicsItemGroup(QGraphicsItem *parent
+#ifndef Q_QDOC
+                                       // obsolete argument
+                                       , QGraphicsScene *scene
+#endif
+    )
+    : QGraphicsItem(*new QGraphicsItemGroupPrivate, parent, scene)
+{
+    setHandlesChildEvents(true);
+}
+
+/*!
+    Destroys the QGraphicsItemGroup.
+*/
+QGraphicsItemGroup::~QGraphicsItemGroup()
+{
+}
+
+/*!
+    Adds the given \a item to this item group. The item will be
+    reparented to this group, but its position and transformation
+    relative to the scene will stay intact.
+
+    \sa removeFromGroup(), QGraphicsScene::createItemGroup()
+*/
+void QGraphicsItemGroup::addToGroup(QGraphicsItem *item)
+{
+    Q_D(QGraphicsItemGroup);
+    if (!item) {
+        qWarning("QGraphicsItemGroup::addToGroup: cannot add null item");
+        return;
+    }
+    if (item == this) {
+        qWarning("QGraphicsItemGroup::addToGroup: cannot add a group to itself");
+        return;
+    }
+
+    // COMBINE
+    bool ok;
+    QTransform itemTransform = item->itemTransform(this, &ok);
+
+    if (!ok) {
+        qWarning("QGraphicsItemGroup::addToGroup: could not find a valid transformation from item to group coordinates");
+        return;
+    }
+
+    QTransform newItemTransform(itemTransform);
+    item->setPos(mapFromItem(item, 0, 0));
+    item->setParentItem(this);
+
+    // removing position from translation component of the new transform
+    if (!item->pos().isNull())
+        newItemTransform *= QTransform::fromTranslate(-item->x(), -item->y());
+
+    // removing additional transformations properties applied with itemTransform()
+    QPointF origin = item->transformOriginPoint();
+    QMatrix4x4 m;
+    QList<QGraphicsTransform*> transformList = item->transformations();
+    for (int i = 0; i < transformList.size(); ++i)
+        transformList.at(i)->applyTo(&m);
+    newItemTransform *= m.toTransform().inverted();
+    newItemTransform.translate(origin.x(), origin.y());
+    newItemTransform.rotate(-item->rotation());
+    newItemTransform.scale(1/item->scale(), 1/item->scale());
+    newItemTransform.translate(-origin.x(), -origin.y());
+
+    // ### Expensive, we could maybe use dirtySceneTransform bit for optimization
+
+    item->setTransform(newItemTransform);
+    item->d_func()->setIsMemberOfGroup(true);
+    prepareGeometryChange();
+    d->itemsBoundingRect |= itemTransform.mapRect(item->boundingRect() | item->childrenBoundingRect());
+    update();
+}
+
+/*!
+    Removes the specified \a item from this group. The item will be
+    reparented to this group's parent item, or to 0 if this group has
+    no parent.  Its position and transformation relative to the scene
+    will stay intact.
+
+    \sa addToGroup(), QGraphicsScene::destroyItemGroup()
+*/
+void QGraphicsItemGroup::removeFromGroup(QGraphicsItem *item)
+{
+    Q_D(QGraphicsItemGroup);
+    if (!item) {
+        qWarning("QGraphicsItemGroup::removeFromGroup: cannot remove null item");
+        return;
+    }
+
+    QGraphicsItem *newParent = d_ptr->parent;
+
+    // COMBINE
+    bool ok;
+    QTransform itemTransform;
+    if (newParent)
+        itemTransform = item->itemTransform(newParent, &ok);
+    else
+        itemTransform = item->sceneTransform();
+
+    QPointF oldPos = item->mapToItem(newParent, 0, 0);
+    item->setParentItem(newParent);
+    item->setPos(oldPos);
+
+    // removing position from translation component of the new transform
+    if (!item->pos().isNull())
+        itemTransform *= QTransform::fromTranslate(-item->x(), -item->y());
+
+    // removing additional transformations properties applied
+    // with itemTransform() or sceneTransform()
+    QPointF origin = item->transformOriginPoint();
+    QMatrix4x4 m;
+    QList<QGraphicsTransform*> transformList = item->transformations();
+    for (int i = 0; i < transformList.size(); ++i)
+        transformList.at(i)->applyTo(&m);
+    itemTransform *= m.toTransform().inverted();
+    itemTransform.translate(origin.x(), origin.y());
+    itemTransform.rotate(-item->rotation());
+    itemTransform.scale(1 / item->scale(), 1 / item->scale());
+    itemTransform.translate(-origin.x(), -origin.y());
+
+    // ### Expensive, we could maybe use dirtySceneTransform bit for optimization
+
+    item->setTransform(itemTransform);
+    item->d_func()->setIsMemberOfGroup(item->group() != 0);
+
+    // ### Quite expensive. But removeFromGroup() isn't called very often.
+    prepareGeometryChange();
+    d->itemsBoundingRect = childrenBoundingRect();
+}
+
+/*!
+    \reimp
+
+    Returns the bounding rect of this group item, and all its children.
+*/
+QRectF QGraphicsItemGroup::boundingRect() const
+{
+    Q_D(const QGraphicsItemGroup);
+    return d->itemsBoundingRect;
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsItemGroup::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+                               QWidget *widget)
+{
+    Q_UNUSED(widget);
+    if (option->state & QStyle::State_Selected) {
+        Q_D(QGraphicsItemGroup);
+        painter->setBrush(Qt::NoBrush);
+        painter->drawRect(d->itemsBoundingRect);
+    }
+}
+
+/*!
+    \reimp
+*/
+bool QGraphicsItemGroup::isObscuredBy(const QGraphicsItem *item) const
+{
+    return QGraphicsItem::isObscuredBy(item);
+}
+
+/*!
+    \reimp
+*/
+QPainterPath QGraphicsItemGroup::opaqueArea() const
+{
+    return QGraphicsItem::opaqueArea();
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsItemGroup::type() const
+{
+    return Type;
+}
+
+#ifndef QT_NO_GRAPHICSEFFECT
+QRectF QGraphicsItemEffectSourcePrivate::boundingRect(Qt::CoordinateSystem system) const
+{
+    const bool deviceCoordinates = (system == Qt::DeviceCoordinates);
+    if (!info && deviceCoordinates) {
+        // Device coordinates without info not yet supported.
+        qWarning("QGraphicsEffectSource::boundingRect: Not yet implemented, lacking device context");
+        return QRectF();
+    }
+
+    QRectF rect = item->boundingRect();
+    if (!item->d_ptr->children.isEmpty())
+        rect |= item->childrenBoundingRect();
+
+    if (deviceCoordinates) {
+        Q_ASSERT(info->painter);
+        rect = info->painter->worldTransform().mapRect(rect);
+    }
+
+    return rect;
+}
+
+void QGraphicsItemEffectSourcePrivate::draw(QPainter *painter)
+{
+    if (!info) {
+        qWarning("QGraphicsEffectSource::draw: Can only begin as a result of QGraphicsEffect::draw");
+        return;
+    }
+
+    Q_ASSERT(item->d_ptr->scene);
+    QGraphicsScenePrivate *scened = item->d_ptr->scene->d_func();
+    if (painter == info->painter) {
+        scened->draw(item, painter, info->viewTransform, info->transformPtr, info->exposedRegion,
+                     info->widget, info->opacity, info->effectTransform, info->wasDirtySceneTransform,
+                     info->drawItem);
+    } else {
+        QTransform effectTransform = info->painter->worldTransform().inverted();
+        effectTransform *= painter->worldTransform();
+        scened->draw(item, painter, info->viewTransform, info->transformPtr, info->exposedRegion,
+                     info->widget, info->opacity, &effectTransform, info->wasDirtySceneTransform,
+                     info->drawItem);
+    }
+}
+
+// sourceRect must be in the given coordinate system
+QRect QGraphicsItemEffectSourcePrivate::paddedEffectRect(Qt::CoordinateSystem system, QGraphicsEffect::PixmapPadMode mode, const QRectF &sourceRect, bool *unpadded) const
+{
+    QRectF effectRectF;
+
+    if (unpadded)
+        *unpadded = false;
+
+    if (mode == QGraphicsEffect::PadToEffectiveBoundingRect) {
+        if (info) {
+            QRectF deviceRect = system == Qt::DeviceCoordinates ? sourceRect : info->painter->worldTransform().mapRect(sourceRect);
+            effectRectF = item->graphicsEffect()->boundingRectFor(deviceRect);
+            if (unpadded)
+                *unpadded = (effectRectF.size() == sourceRect.size());
+            if (info && system == Qt::LogicalCoordinates)
+                effectRectF = info->painter->worldTransform().inverted().mapRect(effectRectF);
+        } else {
+            // no choice but to send a logical coordinate bounding rect to boundingRectFor
+            effectRectF = item->graphicsEffect()->boundingRectFor(sourceRect);
+        }
+    } else if (mode == QGraphicsEffect::PadToTransparentBorder) {
+        // adjust by 1.5 to account for cosmetic pens
+        effectRectF = sourceRect.adjusted(-1.5, -1.5, 1.5, 1.5);
+    } else {
+        effectRectF = sourceRect;
+        if (unpadded)
+            *unpadded = true;
+    }
+
+    return effectRectF.toAlignedRect();
+}
+
+QPixmap QGraphicsItemEffectSourcePrivate::pixmap(Qt::CoordinateSystem system, QPoint *offset,
+                                                 QGraphicsEffect::PixmapPadMode mode) const
+{
+    const bool deviceCoordinates = (system == Qt::DeviceCoordinates);
+    if (!info && deviceCoordinates) {
+        // Device coordinates without info not yet supported.
+        qWarning("QGraphicsEffectSource::pixmap: Not yet implemented, lacking device context");
+        return QPixmap();
+    }
+    if (!item->d_ptr->scene)
+        return QPixmap();
+    QGraphicsScenePrivate *scened = item->d_ptr->scene->d_func();
+
+    bool unpadded;
+    const QRectF sourceRect = boundingRect(system);
+    QRect effectRect = paddedEffectRect(system, mode, sourceRect, &unpadded);
+
+    if (offset)
+        *offset = effectRect.topLeft();
+
+    bool untransformed = !deviceCoordinates
+            || info->painter->worldTransform().type() <= QTransform::TxTranslate;
+    if (untransformed && unpadded && isPixmap()) {
+        if (offset)
+            *offset = boundingRect(system).topLeft().toPoint();
+        return static_cast<QGraphicsPixmapItem *>(item)->pixmap();
+    }
+
+    if (effectRect.isEmpty())
+        return QPixmap();
+
+    QPixmap pixmap(effectRect.size());
+    pixmap.fill(Qt::transparent);
+    QPainter pixmapPainter(&pixmap);
+    pixmapPainter.setRenderHints(info ? info->painter->renderHints() : QPainter::TextAntialiasing);
+
+    QTransform effectTransform = QTransform::fromTranslate(-effectRect.x(), -effectRect.y());
+    if (deviceCoordinates && info->effectTransform)
+        effectTransform *= *info->effectTransform;
+
+    if (!info) {
+        // Logical coordinates without info.
+        QTransform sceneTransform = item->sceneTransform();
+        QTransform newEffectTransform = sceneTransform.inverted();
+        newEffectTransform *= effectTransform;
+        scened->draw(item, &pixmapPainter, 0, &sceneTransform, 0, 0, qreal(1.0),
+                     &newEffectTransform, false, true);
+    } else if (deviceCoordinates) {
+        // Device coordinates with info.
+        scened->draw(item, &pixmapPainter, info->viewTransform, info->transformPtr, 0,
+                     info->widget, info->opacity, &effectTransform, info->wasDirtySceneTransform,
+                     info->drawItem);
+    } else {
+        // Item coordinates with info.
+        QTransform newEffectTransform = info->transformPtr->inverted();
+        newEffectTransform *= effectTransform;
+        scened->draw(item, &pixmapPainter, info->viewTransform, info->transformPtr, 0,
+                     info->widget, info->opacity, &newEffectTransform, info->wasDirtySceneTransform,
+                     info->drawItem);
+    }
+
+    pixmapPainter.end();
+
+    return pixmap;
+}
+#endif //QT_NO_GRAPHICSEFFECT
+
+#ifndef QT_NO_DEBUG_STREAM
+QDebug operator<<(QDebug debug, QGraphicsItem *item)
+{
+    if (!item) {
+        debug << "QGraphicsItem(0)";
+        return debug;
+    }
+
+    if (QGraphicsObject *o = item->toGraphicsObject())
+        debug << o->metaObject()->className();
+    else
+        debug << "QGraphicsItem";
+    debug << "(this =" << (void*)item
+          << ", parent =" << (void*)item->parentItem()
+          << ", pos =" << item->pos()
+          << ", z =" << item->zValue() << ", flags = "
+          << item->flags() << ")";
+    return debug;
+}
+
+QDebug operator<<(QDebug debug, QGraphicsObject *item)
+{
+    if (!item) {
+        debug << "QGraphicsObject(0)";
+        return debug;
+    }
+
+    debug.nospace() << item->metaObject()->className() << '(' << (void*)item;
+    if (!item->objectName().isEmpty())
+        debug << ", name = " << item->objectName();
+    debug.nospace() << ", parent = " << ((void*)item->parentItem())
+          << ", pos = " << item->pos()
+          << ", z = " << item->zValue() << ", flags = "
+          << item->flags() << ')';
+    return debug.space();
+}
+
+QDebug operator<<(QDebug debug, QGraphicsItem::GraphicsItemChange change)
+{
+    const char *str = "UnknownChange";
+    switch (change) {
+    case QGraphicsItem::ItemChildAddedChange:
+        str = "ItemChildAddedChange";
+        break;
+    case QGraphicsItem::ItemChildRemovedChange:
+        str = "ItemChildRemovedChange";
+        break;
+    case QGraphicsItem::ItemCursorChange:
+        str = "ItemCursorChange";
+        break;
+    case QGraphicsItem::ItemCursorHasChanged:
+        str = "ItemCursorHasChanged";
+        break;
+    case QGraphicsItem::ItemEnabledChange:
+        str = "ItemEnabledChange";
+        break;
+    case QGraphicsItem::ItemEnabledHasChanged:
+        str = "ItemEnabledHasChanged";
+        break;
+    case QGraphicsItem::ItemFlagsChange:
+        str = "ItemFlagsChange";
+        break;
+    case QGraphicsItem::ItemFlagsHaveChanged:
+        str = "ItemFlagsHaveChanged";
+        break;
+    case QGraphicsItem::ItemMatrixChange:
+        str = "ItemMatrixChange";
+        break;
+    case QGraphicsItem::ItemParentChange:
+        str = "ItemParentChange";
+        break;
+    case QGraphicsItem::ItemParentHasChanged:
+        str = "ItemParentHasChanged";
+        break;
+    case QGraphicsItem::ItemPositionChange:
+        str = "ItemPositionChange";
+        break;
+    case QGraphicsItem::ItemPositionHasChanged:
+        str = "ItemPositionHasChanged";
+        break;
+    case QGraphicsItem::ItemSceneChange:
+        str = "ItemSceneChange";
+        break;
+    case QGraphicsItem::ItemSceneHasChanged:
+        str = "ItemSceneHasChanged";
+        break;
+    case QGraphicsItem::ItemSelectedChange:
+        str = "ItemSelectedChange";
+        break;
+    case QGraphicsItem::ItemSelectedHasChanged:
+        str = "ItemSelectedHasChanged";
+        break;
+    case QGraphicsItem::ItemToolTipChange:
+        str = "ItemToolTipChange";
+        break;
+    case QGraphicsItem::ItemToolTipHasChanged:
+        str = "ItemToolTipHasChanged";
+        break;
+    case QGraphicsItem::ItemTransformChange:
+        str = "ItemTransformChange";
+        break;
+    case QGraphicsItem::ItemTransformHasChanged:
+        str = "ItemTransformHasChanged";
+        break;
+    case QGraphicsItem::ItemVisibleChange:
+        str = "ItemVisibleChange";
+        break;
+    case QGraphicsItem::ItemVisibleHasChanged:
+        str = "ItemVisibleHasChanged";
+        break;
+    case QGraphicsItem::ItemZValueChange:
+        str = "ItemZValueChange";
+        break;
+    case QGraphicsItem::ItemZValueHasChanged:
+        str = "ItemZValueHasChanged";
+        break;
+    case QGraphicsItem::ItemOpacityChange:
+        str = "ItemOpacityChange";
+        break;
+    case QGraphicsItem::ItemOpacityHasChanged:
+        str = "ItemOpacityHasChanged";
+        break;
+    case QGraphicsItem::ItemScenePositionHasChanged:
+        str = "ItemScenePositionHasChanged";
+        break;
+    case QGraphicsItem::ItemRotationChange:
+        str = "ItemRotationChange";
+        break;
+    case QGraphicsItem::ItemRotationHasChanged:
+        str = "ItemRotationHasChanged";
+        break;
+    case QGraphicsItem::ItemScaleChange:
+        str = "ItemScaleChange";
+        break;
+    case QGraphicsItem::ItemScaleHasChanged:
+        str = "ItemScaleHasChanged";
+        break;
+    case QGraphicsItem::ItemTransformOriginPointChange:
+        str = "ItemTransformOriginPointChange";
+        break;
+    case QGraphicsItem::ItemTransformOriginPointHasChanged:
+        str = "ItemTransformOriginPointHasChanged";
+        break;
+    }
+    debug << str;
+    return debug;
+}
+
+QDebug operator<<(QDebug debug, QGraphicsItem::GraphicsItemFlag flag)
+{
+    const char *str = "UnknownFlag";
+    switch (flag) {
+    case QGraphicsItem::ItemIsMovable:
+        str = "ItemIsMovable";
+        break;
+    case QGraphicsItem::ItemIsSelectable:
+        str = "ItemIsSelectable";
+        break;
+    case QGraphicsItem::ItemIsFocusable:
+        str = "ItemIsFocusable";
+        break;
+    case QGraphicsItem::ItemClipsToShape:
+        str = "ItemClipsToShape";
+        break;
+    case QGraphicsItem::ItemClipsChildrenToShape:
+        str = "ItemClipsChildrenToShape";
+        break;
+    case QGraphicsItem::ItemIgnoresTransformations:
+        str = "ItemIgnoresTransformations";
+        break;
+    case QGraphicsItem::ItemIgnoresParentOpacity:
+        str = "ItemIgnoresParentOpacity";
+        break;
+    case QGraphicsItem::ItemDoesntPropagateOpacityToChildren:
+        str = "ItemDoesntPropagateOpacityToChildren";
+        break;
+    case QGraphicsItem::ItemStacksBehindParent:
+        str = "ItemStacksBehindParent";
+        break;
+    case QGraphicsItem::ItemUsesExtendedStyleOption:
+        str = "ItemUsesExtendedStyleOption";
+        break;
+    case QGraphicsItem::ItemHasNoContents:
+        str = "ItemHasNoContents";
+        break;
+    case QGraphicsItem::ItemSendsGeometryChanges:
+        str = "ItemSendsGeometryChanges";
+        break;
+    case QGraphicsItem::ItemAcceptsInputMethod:
+        str = "ItemAcceptsInputMethod";
+        break;
+    case QGraphicsItem::ItemNegativeZStacksBehindParent:
+        str = "ItemNegativeZStacksBehindParent";
+        break;
+    case QGraphicsItem::ItemIsPanel:
+        str = "ItemIsPanel";
+        break;
+    case QGraphicsItem::ItemIsFocusScope:
+        str = "ItemIsFocusScope";
+        break;
+    case QGraphicsItem::ItemSendsScenePositionChanges:
+        str = "ItemSendsScenePositionChanges";
+        break;
+    case QGraphicsItem::ItemStopsClickFocusPropagation:
+        str = "ItemStopsClickFocusPropagation";
+        break;
+    case QGraphicsItem::ItemStopsFocusHandling:
+        str = "ItemStopsFocusHandling";
+        break;
+    }
+    debug << str;
+    return debug;
+}
+
+QDebug operator<<(QDebug debug, QGraphicsItem::GraphicsItemFlags flags)
+{
+    debug << '(';
+    bool f = false;
+    for (int i = 0; i < 17; ++i) {
+        if (flags & (1 << i)) {
+            if (f)
+                debug << '|';
+            f = true;
+            debug << QGraphicsItem::GraphicsItemFlag(int(flags & (1 << i)));
+        }
+    }
+    debug << ')';
+    return debug;
+}
+
+#endif
+
+QT_END_NAMESPACE
+
+#include "moc_qgraphicsitem.cpp"
+
+#endif // QT_NO_GRAPHICSVIEW