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Diffstat (limited to 'src/declarative/items/qquickpositioners.cpp')
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diff --git a/src/declarative/items/qquickpositioners.cpp b/src/declarative/items/qquickpositioners.cpp deleted file mode 100644 index 08fa4b1724..0000000000 --- a/src/declarative/items/qquickpositioners.cpp +++ /dev/null @@ -1,1532 +0,0 @@ -/**************************************************************************** -** -** 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 QtDeclarative module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** 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. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qquickpositioners_p.h" -#include "qquickpositioners_p_p.h" - -#include <QtDeclarative/qdeclarative.h> -#include <QtDeclarative/qdeclarativeinfo.h> -#include <QtCore/qmath.h> -#include <QtCore/qcoreapplication.h> - -#include <private/qdeclarativestate_p.h> -#include <private/qdeclarativestategroup_p.h> -#include <private/qdeclarativestateoperations_p.h> -#include <private/qdeclarativetransition_p.h> - -QT_BEGIN_NAMESPACE - -static const QQuickItemPrivate::ChangeTypes watchedChanges - = QQuickItemPrivate::Geometry - | QQuickItemPrivate::SiblingOrder - | QQuickItemPrivate::Visibility - | QQuickItemPrivate::Destroyed; - -void QQuickBasePositionerPrivate::watchChanges(QQuickItem *other) -{ - QQuickItemPrivate *otherPrivate = QQuickItemPrivate::get(other); - otherPrivate->addItemChangeListener(this, watchedChanges); -} - -void QQuickBasePositionerPrivate::unwatchChanges(QQuickItem* other) -{ - QQuickItemPrivate *otherPrivate = QQuickItemPrivate::get(other); - otherPrivate->removeItemChangeListener(this, watchedChanges); -} - -QQuickBasePositioner::QQuickBasePositioner(PositionerType at, QQuickItem *parent) - : QQuickImplicitSizeItem(*(new QQuickBasePositionerPrivate), parent) -{ - Q_D(QQuickBasePositioner); - d->init(at); -} -/*! - \internal - \class QQuickBasePositioner - \brief The QQuickBasePositioner class provides a base for QQuickGraphics layouts. - - To create a QQuickGraphics Positioner, simply subclass QQuickBasePositioner and implement - doLayout(), which is automatically called when the layout might need - updating. In doLayout() use the setX and setY functions from QQuickBasePositioner, and the - base class will apply the positions along with the appropriate transitions. The items to - position are provided in order as the protected member positionedItems. - - You also need to set a PositionerType, to declare whether you are positioning the x, y or both - for the child items. Depending on the chosen type, only x or y changes will be applied. - - Note that the subclass is responsible for adding the spacing in between items. - - Positioning is usually delayed until before a frame is rendered, to batch multiple repositioning - changes into one calculation. -*/ - -QQuickBasePositioner::QQuickBasePositioner(QQuickBasePositionerPrivate &dd, PositionerType at, QQuickItem *parent) - : QQuickImplicitSizeItem(dd, parent) -{ - Q_D(QQuickBasePositioner); - d->init(at); -} - -QQuickBasePositioner::~QQuickBasePositioner() -{ - Q_D(QQuickBasePositioner); - for (int i = 0; i < positionedItems.count(); ++i) - d->unwatchChanges(positionedItems.at(i).item); - positionedItems.clear(); -} - -void QQuickBasePositioner::updatePolish() -{ - Q_D(QQuickBasePositioner); - if (d->positioningDirty) - prePositioning(); -} - -int QQuickBasePositioner::spacing() const -{ - Q_D(const QQuickBasePositioner); - return d->spacing; -} - -void QQuickBasePositioner::setSpacing(int s) -{ - Q_D(QQuickBasePositioner); - if (s==d->spacing) - return; - d->spacing = s; - d->setPositioningDirty(); - emit spacingChanged(); -} - -QDeclarativeTransition *QQuickBasePositioner::move() const -{ - Q_D(const QQuickBasePositioner); - return d->moveTransition; -} - -void QQuickBasePositioner::setMove(QDeclarativeTransition *mt) -{ - Q_D(QQuickBasePositioner); - if (mt == d->moveTransition) - return; - d->moveTransition = mt; - emit moveChanged(); -} - -QDeclarativeTransition *QQuickBasePositioner::add() const -{ - Q_D(const QQuickBasePositioner); - return d->addTransition; -} - -void QQuickBasePositioner::setAdd(QDeclarativeTransition *add) -{ - Q_D(QQuickBasePositioner); - if (add == d->addTransition) - return; - - d->addTransition = add; - emit addChanged(); -} - -void QQuickBasePositioner::componentComplete() -{ - QQuickItem::componentComplete(); - positionedItems.reserve(childItems().count()); - prePositioning(); - reportConflictingAnchors(); -} - -void QQuickBasePositioner::itemChange(ItemChange change, const ItemChangeData &value) -{ - Q_D(QQuickBasePositioner); - if (change == ItemChildAddedChange){ - d->setPositioningDirty(); - } else if (change == ItemChildRemovedChange) { - QQuickItem *child = value.item; - QQuickBasePositioner::PositionedItem posItem(child); - int idx = positionedItems.find(posItem); - if (idx >= 0) { - d->unwatchChanges(child); - positionedItems.remove(idx); - } - d->setPositioningDirty(); - } - - QQuickItem::itemChange(change, value); -} - -void QQuickBasePositioner::prePositioning() -{ - Q_D(QQuickBasePositioner); - if (!isComponentComplete()) - return; - - if (d->doingPositioning) - return; - - d->positioningDirty = false; - d->doingPositioning = true; - //Need to order children by creation order modified by stacking order - QList<QQuickItem *> children = childItems(); - - QPODVector<PositionedItem,8> oldItems; - positionedItems.copyAndClear(oldItems); - for (int ii = 0; ii < children.count(); ++ii) { - QQuickItem *child = children.at(ii); - QQuickItemPrivate *childPrivate = QQuickItemPrivate::get(child); - PositionedItem *item = 0; - PositionedItem posItem(child); - int wIdx = oldItems.find(posItem); - if (wIdx < 0) { - d->watchChanges(child); - positionedItems.append(posItem); - item = &positionedItems[positionedItems.count()-1]; - item->isNew = true; - if (!childPrivate->explicitVisible || !child->width() || !child->height()) - item->isVisible = false; - } else { - item = &oldItems[wIdx]; - // Items are only omitted from positioning if they are explicitly hidden - // i.e. their positioning is not affected if an ancestor is hidden. - if (!childPrivate->explicitVisible || !child->width() || !child->height()) { - item->isVisible = false; - } else if (!item->isVisible) { - item->isVisible = true; - item->isNew = true; - } else { - item->isNew = false; - } - positionedItems.append(*item); - } - } - QSizeF contentSize(0,0); - doPositioning(&contentSize); - updateAttachedProperties(); - if (!d->addActions.isEmpty() || !d->moveActions.isEmpty()) - finishApplyTransitions(); - d->doingPositioning = false; - //Set implicit size to the size of its children - setImplicitSize(contentSize.width(), contentSize.height()); -} - -void QQuickBasePositioner::positionX(int x, const PositionedItem &target) -{ - Q_D(QQuickBasePositioner); - if (d->type == Horizontal || d->type == Both) { - if (target.isNew) { - if (!d->addTransition || !d->addTransition->enabled()) - target.item->setX(x); - else - d->addActions << QDeclarativeAction(target.item, QLatin1String("x"), QVariant(x)); - } else if (x != target.item->x()) { - if (!d->moveTransition || !d->moveTransition->enabled()) - target.item->setX(x); - else - d->moveActions << QDeclarativeAction(target.item, QLatin1String("x"), QVariant(x)); - } - } -} - -void QQuickBasePositioner::positionY(int y, const PositionedItem &target) -{ - Q_D(QQuickBasePositioner); - if (d->type == Vertical || d->type == Both) { - if (target.isNew) { - if (!d->addTransition || !d->addTransition->enabled()) - target.item->setY(y); - else - d->addActions << QDeclarativeAction(target.item, QLatin1String("y"), QVariant(y)); - } else if (y != target.item->y()) { - if (!d->moveTransition || !d->moveTransition->enabled()) - target.item->setY(y); - else - d->moveActions << QDeclarativeAction(target.item, QLatin1String("y"), QVariant(y)); - } - } -} - -void QQuickBasePositioner::finishApplyTransitions() -{ - Q_D(QQuickBasePositioner); - // Note that if a transition is not set the transition manager will - // apply the changes directly, in the case add/move aren't set - d->addTransitionManager.transition(d->addActions, d->addTransition); - d->moveTransitionManager.transition(d->moveActions, d->moveTransition); - d->addActions.clear(); - d->moveActions.clear(); -} - -QQuickPositionerAttached *QQuickBasePositioner::qmlAttachedProperties(QObject *obj) -{ - return new QQuickPositionerAttached(obj); -} - -void QQuickBasePositioner::updateAttachedProperties(QQuickPositionerAttached *specificProperty, QQuickItem *specificPropertyOwner) const -{ - // If this function is deemed too expensive or shows up in profiles, it could - // be changed to run only when there are attached properties present. This - // could be a flag in the positioner that is set by the attached property - // constructor. - QQuickPositionerAttached *prevLastProperty = 0; - QQuickPositionerAttached *lastProperty = 0; - - int visibleItemIndex = 0; - for (int ii = 0; ii < positionedItems.count(); ++ii) { - const PositionedItem &child = positionedItems.at(ii); - if (!child.item) - continue; - - QQuickPositionerAttached *property = 0; - - if (specificProperty) { - if (specificPropertyOwner == child.item) { - property = specificProperty; - } - } else { - property = static_cast<QQuickPositionerAttached *>(qmlAttachedPropertiesObject<QQuickBasePositioner>(child.item, false)); - } - - if (child.isVisible) { - if (property) { - property->setIndex(visibleItemIndex); - property->setIsFirstItem(visibleItemIndex == 0); - - if (property->isLastItem()) - prevLastProperty = property; - } - - lastProperty = property; - ++visibleItemIndex; - } else if (property) { - property->setIndex(-1); - property->setIsFirstItem(false); - property->setIsLastItem(false); - } - } - - if (prevLastProperty && prevLastProperty != lastProperty) - prevLastProperty->setIsLastItem(false); - if (lastProperty) - lastProperty->setIsLastItem(true); -} - -/*! - \qmlclass Positioner QQuickPositionerAttached - \inqmlmodule QtQuick 2 - \ingroup qml-positioning-elements - \brief The Positioner type provides attached properties that contain details on where an item exists in a positioner. - - Positioner items (such as Column, Row, Flow and Grid) provide automatic layout - for child items. Attaching this property allows a child item to determine - where it exists within the positioner. -*/ - -QQuickPositionerAttached::QQuickPositionerAttached(QObject *parent) : QObject(parent), m_index(-1), m_isFirstItem(false), m_isLastItem(false) -{ - QQuickItem *attachedItem = qobject_cast<QQuickItem *>(parent); - if (attachedItem) { - QQuickBasePositioner *positioner = qobject_cast<QQuickBasePositioner *>(attachedItem->parent()); - if (positioner) { - positioner->updateAttachedProperties(this, attachedItem); - } - } -} - -/*! - \qmlattachedproperty Item QtQuick2::Positioner::index - - This property allows the item to determine - its index within the positioner. -*/ -void QQuickPositionerAttached::setIndex(int index) -{ - if (m_index == index) - return; - m_index = index; - emit indexChanged(); -} - -/*! - \qmlattachedproperty Item QtQuick2::Positioner::isFirstItem - \qmlattachedproperty Item QtQuick2::Positioner::isLastItem - - These properties allow the item to determine if it - is the first or last item in the positioner, respectively. -*/ -void QQuickPositionerAttached::setIsFirstItem(bool isFirstItem) -{ - if (m_isFirstItem == isFirstItem) - return; - m_isFirstItem = isFirstItem; - emit isFirstItemChanged(); -} - -void QQuickPositionerAttached::setIsLastItem(bool isLastItem) -{ - if (m_isLastItem == isLastItem) - return; - m_isLastItem = isLastItem; - emit isLastItemChanged(); -} - -/*! - \qmlclass Column QQuickColumn - \inqmlmodule QtQuick 2 - \ingroup qml-positioning-elements - \brief The Column item arranges its children vertically. - \inherits Item - - The Column item positions its child items so that they are vertically - aligned and not overlapping. - - Spacing between items can be added using the \l spacing property. - Transitions can be used for cases where items managed by a Column are - added or moved. These are stored in the \l add and \l move properties - respectively. - - See \l{Using QML Positioner and Repeater Items} for more details about this item and other - related items. - - \section1 Example Usage - - The following example positions differently shaped rectangles using a Column - item. - - \image verticalpositioner_example.png - - \snippet doc/src/snippets/declarative/column/vertical-positioner.qml document - - \section1 Using Transitions - - Transitions can be used to animate items that are added to, moved within, - or removed from a Column item. The \l add and \l move properties can be set to - the transitions that will be applied when items are added to, removed from, - or re-positioned within a Column item. - - The use of transitions with positioners is described in more detail in the - \l{Using QML Positioner and Repeater Items#Using Transitions}{Using QML - Positioner and Repeater Items} document. - - \image verticalpositioner_transition.gif - - \qml - Column { - spacing: 2 - add: Transition { - // Define an animation for adding a new item... - } - move: Transition { - // Define an animation for moving items within the column... - } - // ... - } - \endqml - - \section1 Limitations - - Note that the positioner assumes that the x and y positions of its children - will not change. If you manually change the x or y properties in script, bind - the x or y properties, use anchors on a child of a positioner, or have the - height of a child depend on the position of a child, then the - positioner may exhibit strange behavior. If you need to perform any of these - actions, consider positioning the items without the use of a Column. - - Items with a width or height of 0 will not be positioned. - - Positioning is batched and syncronized with painting to reduce the number of - calculations needed. This means that positioners may not reposition items immediately - when changes occur, but it will have moved by the next frame. - - \sa Row, Grid, Flow, Positioner, {declarative/positioners}{Positioners example} -*/ -/*! - \qmlproperty Transition QtQuick2::Column::add - - This property holds the transition to be applied when adding an - item to the positioner. The transition will only be applied to the - added item(s). Positioner transitions will only affect the - position (x, y) of items. - - For a positioner, adding an item can mean that either the object - has been created or reparented, and thus is now a child or the - positioner, or that the object has had its opacity increased from - zero, and thus is now visible. - - \sa move -*/ -/*! - \qmlproperty Transition QtQuick2::Column::move - - This property holds the transition to apply when moving an item - within the positioner. Positioner transitions will only affect - the position (x, y) of items. - - This transition can be performed when other items are added or removed - from the positioner, or when items resize themselves. - - \image positioner-move.gif - - \qml - Column { - move: Transition { - NumberAnimation { - properties: "y" - duration: 1000 - } - } - } - \endqml - - \sa add, {declarative/positioners}{Positioners example} -*/ -/*! - \qmlproperty int QtQuick2::Column::spacing - - The spacing is the amount in pixels left empty between adjacent - items. The default spacing is 0. - - \sa Grid::spacing -*/ -QQuickColumn::QQuickColumn(QQuickItem *parent) -: QQuickBasePositioner(Vertical, parent) -{ -} - -void QQuickColumn::doPositioning(QSizeF *contentSize) -{ - int voffset = 0; - - for (int ii = 0; ii < positionedItems.count(); ++ii) { - const PositionedItem &child = positionedItems.at(ii); - if (!child.item || !child.isVisible) - continue; - - if (child.item->y() != voffset) - positionY(voffset, child); - - contentSize->setWidth(qMax(contentSize->width(), child.item->width())); - - voffset += child.item->height(); - voffset += spacing(); - } - - if (voffset != 0)//If we positioned any items, undo the spacing from the last item - voffset -= spacing(); - contentSize->setHeight(voffset); -} - -void QQuickColumn::reportConflictingAnchors() -{ - QQuickBasePositionerPrivate *d = static_cast<QQuickBasePositionerPrivate*>(QQuickBasePositionerPrivate::get(this)); - for (int ii = 0; ii < positionedItems.count(); ++ii) { - const PositionedItem &child = positionedItems.at(ii); - if (child.item) { - QQuickAnchors *anchors = QQuickItemPrivate::get(static_cast<QQuickItem *>(child.item))->_anchors; - if (anchors) { - QQuickAnchors::Anchors usedAnchors = anchors->usedAnchors(); - if (usedAnchors & QQuickAnchors::TopAnchor || - usedAnchors & QQuickAnchors::BottomAnchor || - usedAnchors & QQuickAnchors::VCenterAnchor || - anchors->fill() || anchors->centerIn()) { - d->anchorConflict = true; - break; - } - } - } - } - if (d->anchorConflict) { - qmlInfo(this) << "Cannot specify top, bottom, verticalCenter, fill or centerIn anchors for items inside Column"; - } -} -/*! - \qmlclass Row QQuickRow - \inqmlmodule QtQuick 2 - \ingroup qml-positioning-elements - \brief The Row item arranges its children horizontally. - \inherits Item - - The Row item positions its child items so that they are horizontally - aligned and not overlapping. - - Use \l spacing to set the spacing between items in a Row, and use the - \l add and \l move properties to set the transitions that should be applied - when items are added to, removed from, or re-positioned within the Row. - - See \l{Using QML Positioner and Repeater Items} for more details about this item and other - related items. - - \section1 Example Usage - - The following example lays out differently shaped rectangles using a Row. - - \image horizontalpositioner_example.png - - \snippet doc/src/snippets/declarative/row/row.qml document - - \section1 Using Transitions - - Transitions can be used to animate items that are added to, moved within, - or removed from a Grid item. The \l add and \l move properties can be set to - the transitions that will be applied when items are added to, removed from, - or re-positioned within a Row item. - - \section1 Limitations - - Note that the positioner assumes that the x and y positions of its children - will not change. If you manually change the x or y properties in script, bind - the x or y properties, use anchors on a child of a positioner, or have the - width of a child depend on the position of a child, then the - positioner may exhibit strange behavior. If you need to perform any of these - actions, consider positioning the items without the use of a Row. - - Items with a width or height of 0 will not be positioned. - - Positioning is batched and syncronized with painting to reduce the number of - calculations needed. This means that positioners may not reposition items immediately - when changes occur, but it will have moved by the next frame. - - \sa Column, Grid, Flow, Positioner, {declarative/positioners}{Positioners example} -*/ -/*! - \qmlproperty Transition QtQuick2::Row::add - - This property holds the transition to be applied when adding an - item to the positioner. The transition will only be applied to the - added item(s). Positioner transitions will only affect the - position (x, y) of items. - - For a positioner, adding an item can mean that either the object - has been created or reparented, and thus is now a child or the - positioner, or that the object has had its opacity increased from - zero, and thus is now visible. - - \sa move -*/ -/*! - \qmlproperty Transition QtQuick2::Row::move - - This property holds the transition to be applied when moving an - item within the positioner. Positioner transitions will only affect - the position (x, y) of items. - - This transition can be performed when other items are added or removed - from the positioner, or when items resize themselves. - - \qml - Row { - id: positioner - move: Transition { - NumberAnimation { - properties: "x" - duration: 1000 - } - } - } - \endqml - - \sa add, {declarative/positioners}{Positioners example} -*/ -/*! - \qmlproperty int QtQuick2::Row::spacing - - The spacing is the amount in pixels left empty between adjacent - items. The default spacing is 0. - - \sa Grid::spacing -*/ - -QQuickRow::QQuickRow(QQuickItem *parent) -: QQuickBasePositioner(Horizontal, parent) -{ -} -/*! - \qmlproperty enumeration QtQuick2::Row::layoutDirection - - This property holds the layoutDirection of the row. - - Possible values: - - \list - \o Qt.LeftToRight (default) - Items are laid out from left to right. If the width of the row is explicitly set, - the left anchor remains to the left of the row. - \o Qt.RightToLeft - Items are laid out from right to left. If the width of the row is explicitly set, - the right anchor remains to the right of the row. - \endlist - - \sa Grid::layoutDirection, Flow::layoutDirection, {declarative/righttoleft/layoutdirection}{Layout directions example} -*/ - -Qt::LayoutDirection QQuickRow::layoutDirection() const -{ - return QQuickBasePositionerPrivate::getLayoutDirection(this); -} - -void QQuickRow::setLayoutDirection(Qt::LayoutDirection layoutDirection) -{ - QQuickBasePositionerPrivate *d = static_cast<QQuickBasePositionerPrivate* >(QQuickBasePositionerPrivate::get(this)); - if (d->layoutDirection != layoutDirection) { - d->layoutDirection = layoutDirection; - // For RTL layout the positioning changes when the width changes. - if (d->layoutDirection == Qt::RightToLeft) - d->addItemChangeListener(d, QQuickItemPrivate::Geometry); - else - d->removeItemChangeListener(d, QQuickItemPrivate::Geometry); - prePositioning(); - emit layoutDirectionChanged(); - emit effectiveLayoutDirectionChanged(); - } -} -/*! - \qmlproperty enumeration QtQuick2::Row::effectiveLayoutDirection - This property holds the effective layout direction of the row positioner. - - When using the attached property \l {LayoutMirroring::enabled}{LayoutMirroring::enabled} for locale layouts, - the visual layout direction of the row positioner will be mirrored. However, the - property \l {Row::layoutDirection}{layoutDirection} will remain unchanged. - - \sa Row::layoutDirection, {LayoutMirroring}{LayoutMirroring} -*/ - -Qt::LayoutDirection QQuickRow::effectiveLayoutDirection() const -{ - return QQuickBasePositionerPrivate::getEffectiveLayoutDirection(this); -} - -void QQuickRow::doPositioning(QSizeF *contentSize) -{ - QQuickBasePositionerPrivate *d = static_cast<QQuickBasePositionerPrivate* >(QQuickBasePositionerPrivate::get(this)); - int hoffset = 0; - - QList<int> hoffsets; - for (int ii = 0; ii < positionedItems.count(); ++ii) { - const PositionedItem &child = positionedItems.at(ii); - if (!child.item || !child.isVisible) - continue; - - if (d->isLeftToRight()) { - if (child.item->x() != hoffset) - positionX(hoffset, child); - } else { - hoffsets << hoffset; - } - - contentSize->setHeight(qMax(contentSize->height(), child.item->height())); - - hoffset += child.item->width(); - hoffset += spacing(); - } - - if (hoffset != 0)//If we positioned any items, undo the extra spacing from the last item - hoffset -= spacing(); - contentSize->setWidth(hoffset); - - if (d->isLeftToRight()) - return; - - //Right to Left layout - int end = 0; - if (!widthValid()) - end = contentSize->width(); - else - end = width(); - - int acc = 0; - for (int ii = 0; ii < positionedItems.count(); ++ii) { - const PositionedItem &child = positionedItems.at(ii); - if (!child.item || !child.isVisible) - continue; - hoffset = end - hoffsets[acc++] - child.item->width(); - if (child.item->x() != hoffset) - positionX(hoffset, child); - } -} - -void QQuickRow::reportConflictingAnchors() -{ - QQuickBasePositionerPrivate *d = static_cast<QQuickBasePositionerPrivate*>(QQuickBasePositionerPrivate::get(this)); - for (int ii = 0; ii < positionedItems.count(); ++ii) { - const PositionedItem &child = positionedItems.at(ii); - if (child.item) { - QQuickAnchors *anchors = QQuickItemPrivate::get(static_cast<QQuickItem *>(child.item))->_anchors; - if (anchors) { - QQuickAnchors::Anchors usedAnchors = anchors->usedAnchors(); - if (usedAnchors & QQuickAnchors::LeftAnchor || - usedAnchors & QQuickAnchors::RightAnchor || - usedAnchors & QQuickAnchors::HCenterAnchor || - anchors->fill() || anchors->centerIn()) { - d->anchorConflict = true; - break; - } - } - } - } - if (d->anchorConflict) - qmlInfo(this) << "Cannot specify left, right, horizontalCenter, fill or centerIn anchors for items inside Row"; -} - -/*! - \qmlclass Grid QQuickGrid - \inqmlmodule QtQuick 2 - \ingroup qml-positioning-elements - \brief The Grid item positions its children in a grid. - \inherits Item - - The Grid item positions its child items so that they are - aligned in a grid and are not overlapping. - - The grid positioner calculates a grid of rectangular cells of sufficient - size to hold all items, placing the items in the cells, from left to right - and top to bottom. Each item is positioned in the top-left corner of its - cell with position (0, 0). - - A Grid defaults to four columns, and as many rows as are necessary to - fit all child items. The number of rows and columns can be constrained - by setting the \l rows and \l columns properties. - - Spacing can be added between child items by setting the \l spacing - property. The amount of spacing applied will be the same in the - horizontal and vertical directions. - - See \l{Using QML Positioner and Repeater Items} for more details about this item and other - related items. - - \section1 Example Usage - - The following example demonstrates this. - - \image gridLayout_example.png - - \snippet doc/src/snippets/declarative/grid/grid.qml document - - \section1 Using Transitions - - Transitions can be used to animate items that are added to, moved within, - or removed from a Grid item. The \l add and \l move properties can be set to - the transitions that will be applied when items are added to, removed from, - or re-positioned within a Grid item. - - \section1 Limitations - - Note that the positioner assumes that the x and y positions of its children - will not change. If you manually change the x or y properties in script, bind - the x or y properties, use anchors on a child of a positioner, or have the - width or height of a child depend on the position of a child, then the - positioner may exhibit strange behavior. If you need to perform any of these - actions, consider positioning the items without the use of a Grid. - - Items with a width or height of 0 will not be positioned. - - Positioning is batched and syncronized with painting to reduce the number of - calculations needed. This means that positioners may not reposition items immediately - when changes occur, but it will have moved by the next frame. - - \sa Flow, Row, Column, Positioner, {declarative/positioners}{Positioners example} -*/ -/*! - \qmlproperty Transition QtQuick2::Grid::add - - This property holds the transition to be applied when adding an - item to the positioner. The transition will only be applied to the - added item(s). Positioner transitions will only affect the - position (x, y) of items. - - For a positioner, adding an item can mean that either the object - has been created or reparented, and thus is now a child or the - positioner, or that the object has had its opacity increased from - zero, and thus is now visible. - - \sa move -*/ -/*! - \qmlproperty Transition QtQuick2::Grid::move - - This property holds the transition to be applied when moving an - item within the positioner. Positioner transitions will only affect - the position (x, y) of items. - - This transition can be performed when other items are added or removed - from the positioner, or when items resize themselves. - - \qml - Grid { - move: Transition { - NumberAnimation { - properties: "x,y" - duration: 1000 - } - } - } - \endqml - - \sa add, {declarative/positioners}{Positioners example} -*/ -/*! - \qmlproperty int QtQuick2::Grid::spacing - - The spacing is the amount in pixels left empty between adjacent - items. The default spacing is 0. - - The below example places a Grid containing a red, a blue and a - green rectangle on a gray background. The area the grid positioner - occupies is colored white. The positioner on the left has the - no spacing (the default), and the positioner on the right has - a spacing of 6. - - \inlineimage qml-grid-no-spacing.png - \inlineimage qml-grid-spacing.png - - \sa rows, columns -*/ -QQuickGrid::QQuickGrid(QQuickItem *parent) : - QQuickBasePositioner(Both, parent), m_rows(-1), m_columns(-1), m_rowSpacing(-1), m_columnSpacing(-1), m_flow(LeftToRight) -{ -} - -/*! - \qmlproperty int QtQuick2::Grid::columns - - This property holds the number of columns in the grid. The default - number of columns is 4. - - If the grid does not have enough items to fill the specified - number of columns, some columns will be of zero width. -*/ - -/*! - \qmlproperty int QtQuick2::Grid::rows - This property holds the number of rows in the grid. - - If the grid does not have enough items to fill the specified - number of rows, some rows will be of zero width. -*/ - -void QQuickGrid::setColumns(const int columns) -{ - if (columns == m_columns) - return; - m_columns = columns; - prePositioning(); - emit columnsChanged(); -} - -void QQuickGrid::setRows(const int rows) -{ - if (rows == m_rows) - return; - m_rows = rows; - prePositioning(); - emit rowsChanged(); -} - -/*! - \qmlproperty enumeration QtQuick2::Grid::flow - This property holds the flow of the layout. - - Possible values are: - - \list - \o Grid.LeftToRight (default) - Items are positioned next to - each other in the \l layoutDirection, then wrapped to the next line. - \o Grid.TopToBottom - Items are positioned next to each - other from top to bottom, then wrapped to the next column. - \endlist -*/ -QQuickGrid::Flow QQuickGrid::flow() const -{ - return m_flow; -} - -void QQuickGrid::setFlow(Flow flow) -{ - if (m_flow != flow) { - m_flow = flow; - prePositioning(); - emit flowChanged(); - } -} - -/*! - \qmlproperty int QtQuick2::Grid::rowSpacing - - This property holds the spacing in pixels between rows. - - \sa columnSpacing - \since QtQuick2.0 -*/ -void QQuickGrid::setRowSpacing(const int rowSpacing) -{ - if (rowSpacing == m_rowSpacing) - return; - m_rowSpacing = rowSpacing; - prePositioning(); - emit rowSpacingChanged(); -} - -/*! - \qmlproperty int QtQuick2::Grid::columnSpacing - - This property holds the spacing in pixels between columns. - - \sa rowSpacing - \since QtQuick2.0 -*/ -void QQuickGrid::setColumnSpacing(const int columnSpacing) -{ - if (columnSpacing == m_columnSpacing) - return; - m_columnSpacing = columnSpacing; - prePositioning(); - emit columnSpacingChanged(); -} - -/*! - \qmlproperty enumeration QtQuick2::Grid::layoutDirection - - This property holds the layout direction of the layout. - - Possible values are: - - \list - \o Qt.LeftToRight (default) - Items are positioned from the top to bottom, - and left to right. The flow direction is dependent on the - \l Grid::flow property. - \o Qt.RightToLeft - Items are positioned from the top to bottom, - and right to left. The flow direction is dependent on the - \l Grid::flow property. - \endlist - - \sa Flow::layoutDirection, Row::layoutDirection, {declarative/righttoleft/layoutdirection}{Layout directions example} -*/ -Qt::LayoutDirection QQuickGrid::layoutDirection() const -{ - return QQuickBasePositionerPrivate::getLayoutDirection(this); -} - -void QQuickGrid::setLayoutDirection(Qt::LayoutDirection layoutDirection) -{ - QQuickBasePositionerPrivate *d = static_cast<QQuickBasePositionerPrivate*>(QQuickBasePositionerPrivate::get(this)); - if (d->layoutDirection != layoutDirection) { - d->layoutDirection = layoutDirection; - // For RTL layout the positioning changes when the width changes. - if (d->layoutDirection == Qt::RightToLeft) - d->addItemChangeListener(d, QQuickItemPrivate::Geometry); - else - d->removeItemChangeListener(d, QQuickItemPrivate::Geometry); - prePositioning(); - emit layoutDirectionChanged(); - emit effectiveLayoutDirectionChanged(); - } -} - -/*! - \qmlproperty enumeration QtQuick2::Grid::effectiveLayoutDirection - This property holds the effective layout direction of the grid positioner. - - When using the attached property \l {LayoutMirroring::enabled}{LayoutMirroring::enabled} for locale layouts, - the visual layout direction of the grid positioner will be mirrored. However, the - property \l {Grid::layoutDirection}{layoutDirection} will remain unchanged. - - \sa Grid::layoutDirection, {LayoutMirroring}{LayoutMirroring} -*/ -Qt::LayoutDirection QQuickGrid::effectiveLayoutDirection() const -{ - return QQuickBasePositionerPrivate::getEffectiveLayoutDirection(this); -} - -void QQuickGrid::doPositioning(QSizeF *contentSize) -{ - QQuickBasePositionerPrivate *d = static_cast<QQuickBasePositionerPrivate*>(QQuickBasePositionerPrivate::get(this)); - int c = m_columns; - int r = m_rows; - //Is allocating the extra QPODVector too much overhead? - QPODVector<PositionedItem, 8> visibleItems;//we aren't concerned with invisible items - visibleItems.reserve(positionedItems.count()); - for (int i=0; i<positionedItems.count(); i++) - if (positionedItems[i].item && positionedItems[i].isVisible) - visibleItems.append(positionedItems[i]); - - int numVisible = visibleItems.count(); - if (m_columns <= 0 && m_rows <= 0){ - c = 4; - r = (numVisible+3)/4; - } else if (m_rows <= 0){ - r = (numVisible+(m_columns-1))/m_columns; - } else if (m_columns <= 0){ - c = (numVisible+(m_rows-1))/m_rows; - } - - if (r==0 || c==0) - return; //Nothing to do - - QList<int> maxColWidth; - QList<int> maxRowHeight; - int childIndex =0; - if (m_flow == LeftToRight) { - for (int i=0; i < r; i++){ - for (int j=0; j < c; j++){ - if (j==0) - maxRowHeight << 0; - if (i==0) - maxColWidth << 0; - - if (childIndex == visibleItems.count()) - break; - - const PositionedItem &child = visibleItems.at(childIndex++); - if (child.item->width() > maxColWidth[j]) - maxColWidth[j] = child.item->width(); - if (child.item->height() > maxRowHeight[i]) - maxRowHeight[i] = child.item->height(); - } - } - } else { - for (int j=0; j < c; j++){ - for (int i=0; i < r; i++){ - if (j==0) - maxRowHeight << 0; - if (i==0) - maxColWidth << 0; - - if (childIndex == visibleItems.count()) - break; - - const PositionedItem &child = visibleItems.at(childIndex++); - if (child.item->width() > maxColWidth[j]) - maxColWidth[j] = child.item->width(); - if (child.item->height() > maxRowHeight[i]) - maxRowHeight[i] = child.item->height(); - } - } - } - - int columnSpacing = m_columnSpacing; - if (columnSpacing == -1) - columnSpacing = spacing(); - - int rowSpacing = m_rowSpacing; - if (rowSpacing == -1) - rowSpacing = spacing(); - - int widthSum = 0; - for (int j=0; j < maxColWidth.size(); j++){ - if (j) - widthSum += columnSpacing; - widthSum += maxColWidth[j]; - } - - int heightSum = 0; - for (int i=0; i < maxRowHeight.size(); i++){ - if (i) - heightSum += rowSpacing; - heightSum += maxRowHeight[i]; - } - - contentSize->setHeight(heightSum); - contentSize->setWidth(widthSum); - - int end = 0; - if (widthValid()) - end = width(); - else - end = widthSum; - - int xoffset=0; - if (!d->isLeftToRight()) - xoffset = end; - int yoffset=0; - int curRow =0; - int curCol =0; - for (int i = 0; i < visibleItems.count(); ++i) { - const PositionedItem &child = visibleItems.at(i); - int childXOffset = xoffset; - if (!d->isLeftToRight()) - childXOffset -= child.item->width(); - if ((child.item->x() != childXOffset) || (child.item->y() != yoffset)){ - positionX(childXOffset, child); - positionY(yoffset, child); - } - - if (m_flow == LeftToRight) { - if (d->isLeftToRight()) - xoffset += maxColWidth[curCol]+columnSpacing; - else - xoffset -= maxColWidth[curCol]+columnSpacing; - curCol++; - curCol%=c; - if (!curCol){ - yoffset += maxRowHeight[curRow]+rowSpacing; - if (d->isLeftToRight()) - xoffset = 0; - else - xoffset = end; - curRow++; - if (curRow>=r) - break; - } - } else { - yoffset+=maxRowHeight[curRow]+rowSpacing; - curRow++; - curRow%=r; - if (!curRow){ - if (d->isLeftToRight()) - xoffset += maxColWidth[curCol]+columnSpacing; - else - xoffset -= maxColWidth[curCol]+columnSpacing; - yoffset=0; - curCol++; - if (curCol>=c) - break; - } - } - } -} - -void QQuickGrid::reportConflictingAnchors() -{ - QQuickBasePositionerPrivate *d = static_cast<QQuickBasePositionerPrivate*>(QQuickBasePositionerPrivate::get(this)); - for (int ii = 0; ii < positionedItems.count(); ++ii) { - const PositionedItem &child = positionedItems.at(ii); - if (child.item) { - QQuickAnchors *anchors = QQuickItemPrivate::get(static_cast<QQuickItem *>(child.item))->_anchors; - if (anchors && (anchors->usedAnchors() || anchors->fill() || anchors->centerIn())) { - d->anchorConflict = true; - break; - } - } - } - if (d->anchorConflict) - qmlInfo(this) << "Cannot specify anchors for items inside Grid"; -} - -/*! - \qmlclass Flow QQuickFlow - \inqmlmodule QtQuick 2 - \ingroup qml-positioning-elements - \brief The Flow item arranges its children side by side, wrapping as necessary. - \inherits Item - - The Flow item positions its child items like words on a page, wrapping them - to create rows or columns of items that do not overlap. - - Spacing between items can be added using the \l spacing property. - Transitions can be used for cases where items managed by a Column are - added or moved. These are stored in the \l add and \l move properties - respectively. - - See \l{Using QML Positioner and Repeater Items} for more details about this item and other - related items. - - \section1 Example Usage - - The following example positions \l Text items within a parent item using - a Flow item. - - \image qml-flow-snippet.png - - \snippet doc/src/snippets/declarative/flow.qml flow item - - \section1 Using Transitions - - Transitions can be used to animate items that are added to, moved within, - or removed from a Flow item. The \l add and \l move properties can be set to - the transitions that will be applied when items are added to, removed from, - or re-positioned within a Flow item. - - The use of transitions with positioners is described in more detail in the - \l{Using QML Positioner and Repeater Items#Using Transitions}{Using QML - Positioner and Repeater Items} document. - - \section1 Limitations - - Note that the positioner assumes that the x and y positions of its children - will not change. If you manually change the x or y properties in script, bind - the x or y properties, use anchors on a child of a positioner, or have the - width or height of a child depend on the position of a child, then the - positioner may exhibit strange behavior. If you need to perform any of these - actions, consider positioning the items without the use of a Flow. - - Items with a width or height of 0 will not be positioned. - - Positioning is batched and syncronized with painting to reduce the number of - calculations needed. This means that positioners may not reposition items immediately - when changes occur, but it will have moved by the next frame. - - \sa Column, Row, Grid, Positioner, {declarative/positioners}{Positioners example} -*/ -/*! - \qmlproperty Transition QtQuick2::Flow::add - - This property holds the transition to be applied when adding an - item to the positioner. The transition will only be applied to the - added item(s). Positioner transitions will only affect the - position (x, y) of items. - - For a positioner, adding an item can mean that either the object - has been created or reparented, and thus is now a child or the - positioner, or that the object has had its opacity increased from - zero, and thus is now visible. - - \sa move -*/ -/*! - \qmlproperty Transition QtQuick2::Flow::move - - This property holds the transition to be applied when moving an - item within the positioner. Positioner transitions will only affect - the position (x, y) of items. - - This transition can be performed when other items are added or removed - from the positioner, or when items resize themselves. - - \qml - Flow { - id: positioner - move: Transition { - NumberAnimation { - properties: "x,y" - ease: "easeOutBounce" - } - } - } - \endqml - - \sa add, {declarative/positioners}{Positioners example} -*/ -/*! - \qmlproperty int QtQuick2::Flow::spacing - - spacing is the amount in pixels left empty between each adjacent - item, and defaults to 0. - - \sa Grid::spacing -*/ - -class QQuickFlowPrivate : public QQuickBasePositionerPrivate -{ - Q_DECLARE_PUBLIC(QQuickFlow) - -public: - QQuickFlowPrivate() - : QQuickBasePositionerPrivate(), flow(QQuickFlow::LeftToRight) - {} - - QQuickFlow::Flow flow; -}; - -QQuickFlow::QQuickFlow(QQuickItem *parent) -: QQuickBasePositioner(*(new QQuickFlowPrivate), Both, parent) -{ - Q_D(QQuickFlow); - // Flow layout requires relayout if its own size changes too. - d->addItemChangeListener(d, QQuickItemPrivate::Geometry); -} - -/*! - \qmlproperty enumeration QtQuick2::Flow::flow - This property holds the flow of the layout. - - Possible values are: - - \list - \o Flow.LeftToRight (default) - Items are positioned next to - to each other according to the \l layoutDirection until the width of the Flow - is exceeded, then wrapped to the next line. - \o Flow.TopToBottom - Items are positioned next to each - other from top to bottom until the height of the Flow is exceeded, - then wrapped to the next column. - \endlist -*/ -QQuickFlow::Flow QQuickFlow::flow() const -{ - Q_D(const QQuickFlow); - return d->flow; -} - -void QQuickFlow::setFlow(Flow flow) -{ - Q_D(QQuickFlow); - if (d->flow != flow) { - d->flow = flow; - prePositioning(); - emit flowChanged(); - } -} - -/*! - \qmlproperty enumeration QtQuick2::Flow::layoutDirection - - This property holds the layout direction of the layout. - - Possible values are: - - \list - \o Qt.LeftToRight (default) - Items are positioned from the top to bottom, - and left to right. The flow direction is dependent on the - \l Flow::flow property. - \o Qt.RightToLeft - Items are positioned from the top to bottom, - and right to left. The flow direction is dependent on the - \l Flow::flow property. - \endlist - - \sa Grid::layoutDirection, Row::layoutDirection, {declarative/righttoleft/layoutdirection}{Layout directions example} -*/ - -Qt::LayoutDirection QQuickFlow::layoutDirection() const -{ - Q_D(const QQuickFlow); - return d->layoutDirection; -} - -void QQuickFlow::setLayoutDirection(Qt::LayoutDirection layoutDirection) -{ - Q_D(QQuickFlow); - if (d->layoutDirection != layoutDirection) { - d->layoutDirection = layoutDirection; - prePositioning(); - emit layoutDirectionChanged(); - emit effectiveLayoutDirectionChanged(); - } -} - -/*! - \qmlproperty enumeration QtQuick2::Flow::effectiveLayoutDirection - This property holds the effective layout direction of the flow positioner. - - When using the attached property \l {LayoutMirroring::enabled}{LayoutMirroring::enabled} for locale layouts, - the visual layout direction of the grid positioner will be mirrored. However, the - property \l {Flow::layoutDirection}{layoutDirection} will remain unchanged. - - \sa Flow::layoutDirection, {LayoutMirroring}{LayoutMirroring} -*/ - -Qt::LayoutDirection QQuickFlow::effectiveLayoutDirection() const -{ - return QQuickBasePositionerPrivate::getEffectiveLayoutDirection(this); -} - -void QQuickFlow::doPositioning(QSizeF *contentSize) -{ - Q_D(QQuickFlow); - - int hoffset = 0; - int voffset = 0; - int linemax = 0; - QList<int> hoffsets; - - for (int i = 0; i < positionedItems.count(); ++i) { - const PositionedItem &child = positionedItems.at(i); - if (!child.item || !child.isVisible) - continue; - - if (d->flow == LeftToRight) { - if (widthValid() && hoffset && hoffset + child.item->width() > width()) { - hoffset = 0; - voffset += linemax + spacing(); - linemax = 0; - } - } else { - if (heightValid() && voffset && voffset + child.item->height() > height()) { - voffset = 0; - hoffset += linemax + spacing(); - linemax = 0; - } - } - - if (d->isLeftToRight()) { - if (child.item->x() != hoffset) - positionX(hoffset, child); - } else { - hoffsets << hoffset; - } - if (child.item->y() != voffset) - positionY(voffset, child); - - contentSize->setWidth(qMax(contentSize->width(), hoffset + child.item->width())); - contentSize->setHeight(qMax(contentSize->height(), voffset + child.item->height())); - - if (d->flow == LeftToRight) { - hoffset += child.item->width(); - hoffset += spacing(); - linemax = qMax(linemax, qCeil(child.item->height())); - } else { - voffset += child.item->height(); - voffset += spacing(); - linemax = qMax(linemax, qCeil(child.item->width())); - } - } - if (d->isLeftToRight()) - return; - - int end; - if (widthValid()) - end = width(); - else - end = contentSize->width(); - int acc = 0; - for (int i = 0; i < positionedItems.count(); ++i) { - const PositionedItem &child = positionedItems.at(i); - if (!child.item || !child.isVisible) - continue; - hoffset = end - hoffsets[acc++] - child.item->width(); - if (child.item->x() != hoffset) - positionX(hoffset, child); - } -} - -void QQuickFlow::reportConflictingAnchors() -{ - Q_D(QQuickFlow); - for (int ii = 0; ii < positionedItems.count(); ++ii) { - const PositionedItem &child = positionedItems.at(ii); - if (child.item) { - QQuickAnchors *anchors = QQuickItemPrivate::get(static_cast<QQuickItem *>(child.item))->_anchors; - if (anchors && (anchors->usedAnchors() || anchors->fill() || anchors->centerIn())) { - d->anchorConflict = true; - break; - } - } - } - if (d->anchorConflict) - qmlInfo(this) << "Cannot specify anchors for items inside Flow"; -} - -QT_END_NAMESPACE |