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Diffstat (limited to 'src/gui/itemviews/qlistview.cpp')
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diff --git a/src/gui/itemviews/qlistview.cpp b/src/gui/itemviews/qlistview.cpp deleted file mode 100644 index 44b45d835d..0000000000 --- a/src/gui/itemviews/qlistview.cpp +++ /dev/null @@ -1,3212 +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 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. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qlistview.h" - -#ifndef QT_NO_LISTVIEW -#include <qabstractitemdelegate.h> -#include <qapplication.h> -#include <qpainter.h> -#include <qbitmap.h> -#include <qvector.h> -#include <qstyle.h> -#include <qevent.h> -#include <qscrollbar.h> -#include <qrubberband.h> -#include <private/qlistview_p.h> -#include <qdebug.h> -#ifndef QT_NO_ACCESSIBILITY -#include <qaccessible.h> -#endif - -QT_BEGIN_NAMESPACE - -/*! - \class QListView - - \brief The QListView class provides a list or icon view onto a model. - - \ingroup model-view - \ingroup advanced - - - A QListView presents items stored in a model, either as a simple - non-hierarchical list, or as a collection of icons. This class is used - to provide lists and icon views that were previously provided by the - \c QListBox and \c QIconView classes, but using the more flexible - approach provided by Qt's model/view architecture. - - The QListView class is one of the \l{Model/View Classes} - and is part of Qt's \l{Model/View Programming}{model/view framework}. - - This view does not display horizontal or vertical headers; to display - a list of items with a horizontal header, use QTreeView instead. - - QListView implements the interfaces defined by the - QAbstractItemView class to allow it to display data provided by - models derived from the QAbstractItemModel class. - - Items in a list view can be displayed using one of two view modes: - In \l ListMode, the items are displayed in the form of a simple list; - in \l IconMode, the list view takes the form of an \e{icon view} in - which the items are displayed with icons like files in a file manager. - By default, the list view is in \l ListMode. To change the view mode, - use the setViewMode() function, and to determine the current view mode, - use viewMode(). - - Items in these views are laid out in the direction specified by the - flow() of the list view. The items may be fixed in place, or allowed - to move, depending on the view's movement() state. - - If the items in the model cannot be completely laid out in the - direction of flow, they can be wrapped at the boundary of the view - widget; this depends on isWrapping(). This property is useful when the - items are being represented by an icon view. - - The resizeMode() and layoutMode() govern how and when the items are - laid out. Items are spaced according to their spacing(), and can exist - within a notional grid of size specified by gridSize(). The items can - be rendered as large or small icons depending on their iconSize(). - - \table 100% - \row \o \inlineimage windowsxp-listview.png Screenshot of a Windows XP style list view - \o \inlineimage macintosh-listview.png Screenshot of a Macintosh style table view - \o \inlineimage plastique-listview.png Screenshot of a Plastique style table view - \row \o A \l{Windows XP Style Widget Gallery}{Windows XP style} list view. - \o A \l{Macintosh Style Widget Gallery}{Macintosh style} list view. - \o A \l{Plastique Style Widget Gallery}{Plastique style} list view. - \endtable - - \section1 Improving Performance - - It is possible to give the view hints about the data it is handling in order - to improve its performance when displaying large numbers of items. One approach - that can be taken for views that are intended to display items with equal sizes - is to set the \l uniformItemSizes property to true. - - \sa {View Classes}, QTreeView, QTableView, QListWidget -*/ - -/*! - \enum QListView::ViewMode - - \value ListMode The items are laid out using TopToBottom flow, with Small size and Static movement - \value IconMode The items are laid out using LeftToRight flow, with Large size and Free movement -*/ - -/*! - \enum QListView::Movement - - \value Static The items cannot be moved by the user. - \value Free The items can be moved freely by the user. - \value Snap The items snap to the specified grid when moved; see - setGridSize(). -*/ - -/*! - \enum QListView::Flow - - \value LeftToRight The items are laid out in the view from the left - to the right. - \value TopToBottom The items are laid out in the view from the top - to the bottom. -*/ - -/*! - \enum QListView::ResizeMode - - \value Fixed The items will only be laid out the first time the view is shown. - \value Adjust The items will be laid out every time the view is resized. -*/ - -/*! - \enum QListView::LayoutMode - - \value SinglePass The items are laid out all at once. - \value Batched The items are laid out in batches of \l batchSize items. - \sa batchSize -*/ - -/*! - \since 4.2 - \fn void QListView::indexesMoved(const QModelIndexList &indexes) - - This signal is emitted when the specified \a indexes are moved in the view. -*/ - -/*! - Creates a new QListView with the given \a parent to view a model. - Use setModel() to set the model. -*/ -QListView::QListView(QWidget *parent) - : QAbstractItemView(*new QListViewPrivate, parent) -{ - setViewMode(ListMode); - setSelectionMode(SingleSelection); - setAttribute(Qt::WA_MacShowFocusRect); - Q_D(QListView); // We rely on a qobject_cast for PM_DefaultFrameWidth to change - d->updateStyledFrameWidths(); // hence we have to force an update now that the object has been constructed -} - -/*! - \internal -*/ -QListView::QListView(QListViewPrivate &dd, QWidget *parent) - : QAbstractItemView(dd, parent) -{ - setViewMode(ListMode); - setSelectionMode(SingleSelection); - setAttribute(Qt::WA_MacShowFocusRect); - Q_D(QListView); // We rely on a qobject_cast for PM_DefaultFrameWidth to change - d->updateStyledFrameWidths(); // hence we have to force an update now that the object has been constructed -} - -/*! - Destroys the view. -*/ -QListView::~QListView() -{ -} - -/*! - \property QListView::movement - \brief whether the items can be moved freely, are snapped to a - grid, or cannot be moved at all. - - This property determines how the user can move the items in the - view. \l Static means that the items can't be moved the user. \l - Free means that the user can drag and drop the items to any - position in the view. \l Snap means that the user can drag and - drop the items, but only to the positions in a notional grid - signified by the gridSize property. - - Setting this property when the view is visible will cause the - items to be laid out again. - - By default, this property is set to \l Static. - - \sa gridSize, resizeMode, viewMode -*/ -void QListView::setMovement(Movement movement) -{ - Q_D(QListView); - d->modeProperties |= uint(QListViewPrivate::Movement); - d->movement = movement; - -#ifndef QT_NO_DRAGANDDROP - bool movable = (movement != Static); - setDragEnabled(movable); - d->viewport->setAcceptDrops(movable); -#endif - d->doDelayedItemsLayout(); -} - -QListView::Movement QListView::movement() const -{ - Q_D(const QListView); - return d->movement; -} - -/*! - \property QListView::flow - \brief which direction the items layout should flow. - - If this property is \l LeftToRight, the items will be laid out left - to right. If the \l isWrapping property is true, the layout will wrap - when it reaches the right side of the visible area. If this - property is \l TopToBottom, the items will be laid out from the top - of the visible area, wrapping when it reaches the bottom. - - Setting this property when the view is visible will cause the - items to be laid out again. - - By default, this property is set to \l TopToBottom. - - \sa viewMode -*/ -void QListView::setFlow(Flow flow) -{ - Q_D(QListView); - d->modeProperties |= uint(QListViewPrivate::Flow); - d->flow = flow; - d->doDelayedItemsLayout(); -} - -QListView::Flow QListView::flow() const -{ - Q_D(const QListView); - return d->flow; -} - -/*! - \property QListView::isWrapping - \brief whether the items layout should wrap. - - This property holds whether the layout should wrap when there is - no more space in the visible area. The point at which the layout wraps - depends on the \l flow property. - - Setting this property when the view is visible will cause the - items to be laid out again. - - By default, this property is false. - - \sa viewMode -*/ -void QListView::setWrapping(bool enable) -{ - Q_D(QListView); - d->modeProperties |= uint(QListViewPrivate::Wrap); - d->setWrapping(enable); - d->doDelayedItemsLayout(); -} - -bool QListView::isWrapping() const -{ - Q_D(const QListView); - return d->isWrapping(); -} - -/*! - \property QListView::resizeMode - \brief whether the items are laid out again when the view is resized. - - If this property is \l Adjust, the items will be laid out again - when the view is resized. If the value is \l Fixed, the items will - not be laid out when the view is resized. - - By default, this property is set to \l Fixed. - - \sa movement, gridSize, viewMode -*/ -void QListView::setResizeMode(ResizeMode mode) -{ - Q_D(QListView); - d->modeProperties |= uint(QListViewPrivate::ResizeMode); - d->resizeMode = mode; -} - -QListView::ResizeMode QListView::resizeMode() const -{ - Q_D(const QListView); - return d->resizeMode; -} - -/*! - \property QListView::layoutMode - \brief determines whether the layout of items should happen immediately or be delayed. - - This property holds the layout mode for the items. When the mode - is \l SinglePass (the default), the items are laid out all in one go. - When the mode is \l Batched, the items are laid out in batches of \l batchSize - items, while processing events. This makes it possible to - instantly view and interact with the visible items while the rest - are being laid out. - - \sa viewMode -*/ -void QListView::setLayoutMode(LayoutMode mode) -{ - Q_D(QListView); - d->layoutMode = mode; -} - -QListView::LayoutMode QListView::layoutMode() const -{ - Q_D(const QListView); - return d->layoutMode; -} - -/*! - \property QListView::spacing - \brief the space around the items in the layout - - This property is the size of the empty space that is padded around - an item in the layout. - - Setting this property when the view is visible will cause the - items to be laid out again. - - By default, this property contains a value of 0. - - \sa viewMode -*/ -// ### Qt5: Use same semantic as layouts (spacing is the size of space -// *between* items) -void QListView::setSpacing(int space) -{ - Q_D(QListView); - d->modeProperties |= uint(QListViewPrivate::Spacing); - d->setSpacing(space); - d->doDelayedItemsLayout(); -} - -int QListView::spacing() const -{ - Q_D(const QListView); - return d->spacing(); -} - -/*! - \property QListView::batchSize - \brief the number of items laid out in each batch if \l layoutMode is - set to \l Batched - - The default value is 100. - - \since 4.2 -*/ - -void QListView::setBatchSize(int batchSize) -{ - Q_D(QListView); - if (batchSize <= 0) { - qWarning("Invalid batchSize (%d)", batchSize); - return; - } - d->batchSize = batchSize; -} - -int QListView::batchSize() const -{ - Q_D(const QListView); - return d->batchSize; -} - -/*! - \property QListView::gridSize - \brief the size of the layout grid - - This property is the size of the grid in which the items are laid - out. The default is an empty size which means that there is no - grid and the layout is not done in a grid. Setting this property - to a non-empty size switches on the grid layout. (When a grid - layout is in force the \l spacing property is ignored.) - - Setting this property when the view is visible will cause the - items to be laid out again. - - \sa viewMode -*/ -void QListView::setGridSize(const QSize &size) -{ - Q_D(QListView); - d->modeProperties |= uint(QListViewPrivate::GridSize); - d->setGridSize(size); - d->doDelayedItemsLayout(); -} - -QSize QListView::gridSize() const -{ - Q_D(const QListView); - return d->gridSize(); -} - -/*! - \property QListView::viewMode - \brief the view mode of the QListView. - - This property will change the other unset properties to conform - with the set view mode. QListView-specific properties that have already been set - will not be changed, unless clearPropertyFlags() has been called. - - Setting the view mode will enable or disable drag and drop based on the - selected movement. For ListMode, the default movement is \l Static - (drag and drop disabled); for IconMode, the default movement is - \l Free (drag and drop enabled). - - \sa isWrapping, spacing, gridSize, flow, movement, resizeMode -*/ -void QListView::setViewMode(ViewMode mode) -{ - Q_D(QListView); - if (d->commonListView && d->viewMode == mode) - return; - d->viewMode = mode; - - delete d->commonListView; - if (mode == ListMode) { - d->commonListView = new QListModeViewBase(this, d); - if (!(d->modeProperties & QListViewPrivate::Wrap)) - d->setWrapping(false); - if (!(d->modeProperties & QListViewPrivate::Spacing)) - d->setSpacing(0); - if (!(d->modeProperties & QListViewPrivate::GridSize)) - d->setGridSize(QSize()); - if (!(d->modeProperties & QListViewPrivate::Flow)) - d->flow = TopToBottom; - if (!(d->modeProperties & QListViewPrivate::Movement)) - d->movement = Static; - if (!(d->modeProperties & QListViewPrivate::ResizeMode)) - d->resizeMode = Fixed; - if (!(d->modeProperties & QListViewPrivate::SelectionRectVisible)) - d->showElasticBand = false; - } else { - d->commonListView = new QIconModeViewBase(this, d); - if (!(d->modeProperties & QListViewPrivate::Wrap)) - d->setWrapping(true); - if (!(d->modeProperties & QListViewPrivate::Spacing)) - d->setSpacing(0); - if (!(d->modeProperties & QListViewPrivate::GridSize)) - d->setGridSize(QSize()); - if (!(d->modeProperties & QListViewPrivate::Flow)) - d->flow = LeftToRight; - if (!(d->modeProperties & QListViewPrivate::Movement)) - d->movement = Free; - if (!(d->modeProperties & QListViewPrivate::ResizeMode)) - d->resizeMode = Fixed; - if (!(d->modeProperties & QListViewPrivate::SelectionRectVisible)) - d->showElasticBand = true; - } - -#ifndef QT_NO_DRAGANDDROP - bool movable = (d->movement != Static); - setDragEnabled(movable); - setAcceptDrops(movable); -#endif - d->clear(); - d->doDelayedItemsLayout(); -} - -QListView::ViewMode QListView::viewMode() const -{ - Q_D(const QListView); - return d->viewMode; -} - -/*! - Clears the QListView-specific property flags. See \l{viewMode}. - - Properties inherited from QAbstractItemView are not covered by the - property flags. Specifically, \l{QAbstractItemView::dragEnabled} - {dragEnabled} and \l{QAbstractItemView::acceptDrops} - {acceptsDrops} are computed by QListView when calling - setMovement() or setViewMode(). -*/ -void QListView::clearPropertyFlags() -{ - Q_D(QListView); - d->modeProperties = 0; -} - -/*! - Returns true if the \a row is hidden; otherwise returns false. -*/ -bool QListView::isRowHidden(int row) const -{ - Q_D(const QListView); - return d->isHidden(row); -} - -/*! - If \a hide is true, the given \a row will be hidden; otherwise - the \a row will be shown. -*/ -void QListView::setRowHidden(int row, bool hide) -{ - Q_D(QListView); - const bool hidden = d->isHidden(row); - if (hide && !hidden) - d->commonListView->appendHiddenRow(row); - else if (!hide && hidden) - d->commonListView->removeHiddenRow(row); - d->doDelayedItemsLayout(); - d->viewport->update(); -} - -/*! - \reimp -*/ -QRect QListView::visualRect(const QModelIndex &index) const -{ - Q_D(const QListView); - return d->mapToViewport(rectForIndex(index)); -} - -/*! - \reimp -*/ -void QListView::scrollTo(const QModelIndex &index, ScrollHint hint) -{ - Q_D(QListView); - - if (index.parent() != d->root || index.column() != d->column) - return; - - const QRect rect = visualRect(index); - if (hint == EnsureVisible && d->viewport->rect().contains(rect)) { - d->viewport->update(rect); - return; - } - - if (d->flow == QListView::TopToBottom || d->isWrapping()) // vertical - verticalScrollBar()->setValue(d->verticalScrollToValue(index, rect, hint)); - - if (d->flow == QListView::LeftToRight || d->isWrapping()) // horizontal - horizontalScrollBar()->setValue(d->horizontalScrollToValue(index, rect, hint)); -} - -int QListViewPrivate::horizontalScrollToValue(const QModelIndex &index, const QRect &rect, - QListView::ScrollHint hint) const -{ - Q_Q(const QListView); - const QRect area = viewport->rect(); - const bool leftOf = q->isRightToLeft() - ? (rect.left() < area.left()) && (rect.right() < area.right()) - : rect.left() < area.left(); - const bool rightOf = q->isRightToLeft() - ? rect.right() > area.right() - : (rect.right() > area.right()) && (rect.left() > area.left()); - return commonListView->horizontalScrollToValue(q->visualIndex(index), hint, leftOf, rightOf, area, rect); -} - -int QListViewPrivate::verticalScrollToValue(const QModelIndex &index, const QRect &rect, - QListView::ScrollHint hint) const -{ - Q_Q(const QListView); - const QRect area = viewport->rect(); - const bool above = (hint == QListView::EnsureVisible && rect.top() < area.top()); - const bool below = (hint == QListView::EnsureVisible && rect.bottom() > area.bottom()); - return commonListView->verticalScrollToValue(q->visualIndex(index), hint, above, below, area, rect); -} - -void QListViewPrivate::selectAll(QItemSelectionModel::SelectionFlags command) -{ - if (!selectionModel) - return; - - QItemSelection selection; - QModelIndex topLeft; - int row = 0; - const int colCount = model->columnCount(root); - for(; row < model->rowCount(root); ++row) { - if (isHidden(row)) { - //it might be the end of a selection range - if (topLeft.isValid()) { - QModelIndex bottomRight = model->index(row - 1, colCount - 1, root); - selection.append(QItemSelectionRange(topLeft, bottomRight)); - topLeft = QModelIndex(); - } - continue; - } - - if (!topLeft.isValid()) //start of a new selection range - topLeft = model->index(row, 0, root); - } - - if (topLeft.isValid()) { - //last selected range - QModelIndex bottomRight = model->index(row - 1, colCount - 1, root); - selection.append(QItemSelectionRange(topLeft, bottomRight)); - } - - if (!selection.isEmpty()) - selectionModel->select(selection, command); -} - -/*! - \reimp - - We have a QListView way of knowing what elements are on the viewport - through the intersectingSet function -*/ -QItemViewPaintPairs QListViewPrivate::draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const -{ - Q_ASSERT(r); - Q_Q(const QListView); - QRect &rect = *r; - const QRect viewportRect = viewport->rect(); - QItemViewPaintPairs ret; - const QSet<QModelIndex> visibleIndexes = intersectingSet(viewportRect).toList().toSet(); - for (int i = 0; i < indexes.count(); ++i) { - const QModelIndex &index = indexes.at(i); - if (visibleIndexes.contains(index)) { - const QRect current = q->visualRect(index); - ret += qMakePair(current, index); - rect |= current; - } - } - rect &= viewportRect; - return ret; -} - -/*! - \internal -*/ -void QListView::reset() -{ - Q_D(QListView); - d->clear(); - d->hiddenRows.clear(); - QAbstractItemView::reset(); -} - -/*! - \internal -*/ -void QListView::setRootIndex(const QModelIndex &index) -{ - Q_D(QListView); - d->column = qBound(0, d->column, d->model->columnCount(index) - 1); - QAbstractItemView::setRootIndex(index); - // sometimes we get an update before reset() is called - d->clear(); - d->hiddenRows.clear(); -} - -/*! - \internal - - Scroll the view contents by \a dx and \a dy. -*/ - -void QListView::scrollContentsBy(int dx, int dy) -{ - Q_D(QListView); - d->delayedAutoScroll.stop(); // auto scroll was canceled by the user scrolling - d->commonListView->scrollContentsBy(dx, dy, d->state == QListView::DragSelectingState); -} - -/*! - \internal - - Resize the internal contents to \a width and \a height and set the - scroll bar ranges accordingly. -*/ -void QListView::resizeContents(int width, int height) -{ - Q_D(QListView); - d->setContentsSize(width, height); -} - -/*! - \internal -*/ -QSize QListView::contentsSize() const -{ - Q_D(const QListView); - return d->contentsSize(); -} - -/*! - \reimp -*/ -void QListView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight) -{ - d_func()->commonListView->dataChanged(topLeft, bottomRight); - QAbstractItemView::dataChanged(topLeft, bottomRight); -} - -/*! - \reimp -*/ -void QListView::rowsInserted(const QModelIndex &parent, int start, int end) -{ - Q_D(QListView); - // ### be smarter about inserted items - d->clear(); - d->doDelayedItemsLayout(); - QAbstractItemView::rowsInserted(parent, start, end); -} - -/*! - \reimp -*/ -void QListView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) -{ - Q_D(QListView); - // if the parent is above d->root in the tree, nothing will happen - QAbstractItemView::rowsAboutToBeRemoved(parent, start, end); - if (parent == d->root) { - QSet<QPersistentModelIndex>::iterator it = d->hiddenRows.begin(); - while (it != d->hiddenRows.end()) { - int hiddenRow = it->row(); - if (hiddenRow >= start && hiddenRow <= end) { - it = d->hiddenRows.erase(it); - } else { - ++it; - } - } - } - d->clear(); - d->doDelayedItemsLayout(); -} - -/*! - \reimp -*/ -void QListView::mouseMoveEvent(QMouseEvent *e) -{ - if (!isVisible()) - return; - Q_D(QListView); - QAbstractItemView::mouseMoveEvent(e); - if (state() == DragSelectingState - && d->showElasticBand - && d->selectionMode != SingleSelection - && d->selectionMode != NoSelection) { - QRect rect(d->pressedPosition, e->pos() + QPoint(horizontalOffset(), verticalOffset())); - rect = rect.normalized(); - d->viewport->update(d->mapToViewport(rect.united(d->elasticBand))); - d->elasticBand = rect; - } -} - -/*! - \reimp -*/ -void QListView::mouseReleaseEvent(QMouseEvent *e) -{ - Q_D(QListView); - QAbstractItemView::mouseReleaseEvent(e); - // #### move this implementation into a dynamic class - if (d->showElasticBand && d->elasticBand.isValid()) { - d->viewport->update(d->mapToViewport(d->elasticBand)); - d->elasticBand = QRect(); - } -} - -/*! - \reimp -*/ -void QListView::timerEvent(QTimerEvent *e) -{ - Q_D(QListView); - if (e->timerId() == d->batchLayoutTimer.timerId()) { - if (d->doItemsLayout(d->batchSize)) { // layout is done - d->batchLayoutTimer.stop(); - updateGeometries(); - d->viewport->update(); - } - } - QAbstractItemView::timerEvent(e); -} - -/*! - \reimp -*/ -void QListView::resizeEvent(QResizeEvent *e) -{ - Q_D(QListView); - if (d->delayedPendingLayout) - return; - - QSize delta = e->size() - e->oldSize(); - - if (delta.isNull()) - return; - - bool listWrap = (d->viewMode == ListMode) && d->wrapItemText; - bool flowDimensionChanged = (d->flow == LeftToRight && delta.width() != 0) - || (d->flow == TopToBottom && delta.height() != 0); - - // We post a delayed relayout in the following cases : - // - we're wrapping - // - the state is NoState, we're adjusting and the size has changed in the flowing direction - if (listWrap - || (state() == NoState && d->resizeMode == Adjust && flowDimensionChanged)) { - d->doDelayedItemsLayout(100); // wait 1/10 sec before starting the layout - } else { - QAbstractItemView::resizeEvent(e); - } -} - -#ifndef QT_NO_DRAGANDDROP - -/*! - \reimp -*/ -void QListView::dragMoveEvent(QDragMoveEvent *e) -{ - Q_D(QListView); - if (!d->commonListView->filterDragMoveEvent(e)) { - if (viewMode() == QListView::ListMode && flow() == QListView::LeftToRight) - static_cast<QListModeViewBase *>(d->commonListView)->dragMoveEvent(e); - else - QAbstractItemView::dragMoveEvent(e); - } -} - - -/*! - \reimp -*/ -void QListView::dragLeaveEvent(QDragLeaveEvent *e) -{ - if (!d_func()->commonListView->filterDragLeaveEvent(e)) - QAbstractItemView::dragLeaveEvent(e); -} - -/*! - \reimp -*/ -void QListView::dropEvent(QDropEvent *e) -{ - if (!d_func()->commonListView->filterDropEvent(e)) - QAbstractItemView::dropEvent(e); -} - -/*! - \reimp -*/ -void QListView::startDrag(Qt::DropActions supportedActions) -{ - if (!d_func()->commonListView->filterStartDrag(supportedActions)) - QAbstractItemView::startDrag(supportedActions); -} - -/*! - \internal - - Called whenever items from the view is dropped on the viewport. - The \a event provides additional information. -*/ -void QListView::internalDrop(QDropEvent *event) -{ - // ### Qt5: remove that function - Q_UNUSED(event); -} - -/*! - \internal - - Called whenever the user starts dragging items and the items are movable, - enabling internal dragging and dropping of items. -*/ -void QListView::internalDrag(Qt::DropActions supportedActions) -{ - // ### Qt5: remove that function - Q_UNUSED(supportedActions); -} - -#endif // QT_NO_DRAGANDDROP - -/*! - \reimp -*/ -QStyleOptionViewItem QListView::viewOptions() const -{ - Q_D(const QListView); - QStyleOptionViewItem option = QAbstractItemView::viewOptions(); - if (!d->iconSize.isValid()) { // otherwise it was already set in abstractitemview - int pm = (d->viewMode == ListMode - ? style()->pixelMetric(QStyle::PM_ListViewIconSize, 0, this) - : style()->pixelMetric(QStyle::PM_IconViewIconSize, 0, this)); - option.decorationSize = QSize(pm, pm); - } - if (d->viewMode == IconMode) { - option.showDecorationSelected = false; - option.decorationPosition = QStyleOptionViewItem::Top; - option.displayAlignment = Qt::AlignCenter; - } else { - option.decorationPosition = QStyleOptionViewItem::Left; - } - return option; -} - - -/*! - \reimp -*/ -void QListView::paintEvent(QPaintEvent *e) -{ - Q_D(QListView); - if (!d->itemDelegate) - return; - QStyleOptionViewItemV4 option = d->viewOptionsV4(); - QPainter painter(d->viewport); - - const QVector<QModelIndex> toBeRendered = d->intersectingSet(e->rect().translated(horizontalOffset(), verticalOffset()), false); - - const QModelIndex current = currentIndex(); - const QModelIndex hover = d->hover; - const QAbstractItemModel *itemModel = d->model; - const QItemSelectionModel *selections = d->selectionModel; - const bool focus = (hasFocus() || d->viewport->hasFocus()) && current.isValid(); - const bool alternate = d->alternatingColors; - const QStyle::State state = option.state; - const QAbstractItemView::State viewState = this->state(); - const bool enabled = (state & QStyle::State_Enabled) != 0; - - bool alternateBase = false; - int previousRow = -2; // trigger the alternateBase adjustment on first pass - - int maxSize = (flow() == TopToBottom) - ? qMax(viewport()->size().width(), d->contentsSize().width()) - 2 * d->spacing() - : qMax(viewport()->size().height(), d->contentsSize().height()) - 2 * d->spacing(); - - QVector<QModelIndex>::const_iterator end = toBeRendered.constEnd(); - for (QVector<QModelIndex>::const_iterator it = toBeRendered.constBegin(); it != end; ++it) { - Q_ASSERT((*it).isValid()); - option.rect = visualRect(*it); - - if (flow() == TopToBottom) - option.rect.setWidth(qMin(maxSize, option.rect.width())); - else - option.rect.setHeight(qMin(maxSize, option.rect.height())); - - option.state = state; - if (selections && selections->isSelected(*it)) - option.state |= QStyle::State_Selected; - if (enabled) { - QPalette::ColorGroup cg; - if ((itemModel->flags(*it) & Qt::ItemIsEnabled) == 0) { - option.state &= ~QStyle::State_Enabled; - cg = QPalette::Disabled; - } else { - cg = QPalette::Normal; - } - option.palette.setCurrentColorGroup(cg); - } - if (focus && current == *it) { - option.state |= QStyle::State_HasFocus; - if (viewState == EditingState) - option.state |= QStyle::State_Editing; - } - if (*it == hover) - option.state |= QStyle::State_MouseOver; - else - option.state &= ~QStyle::State_MouseOver; - - if (alternate) { - int row = (*it).row(); - if (row != previousRow + 1) { - // adjust alternateBase according to rows in the "gap" - if (!d->hiddenRows.isEmpty()) { - for (int r = qMax(previousRow + 1, 0); r < row; ++r) { - if (!d->isHidden(r)) - alternateBase = !alternateBase; - } - } else { - alternateBase = (row & 1) != 0; - } - } - if (alternateBase) { - option.features |= QStyleOptionViewItemV2::Alternate; - } else { - option.features &= ~QStyleOptionViewItemV2::Alternate; - } - - // draw background of the item (only alternate row). rest of the background - // is provided by the delegate - QStyle::State oldState = option.state; - option.state &= ~QStyle::State_Selected; - style()->drawPrimitive(QStyle::PE_PanelItemViewRow, &option, &painter, this); - option.state = oldState; - - alternateBase = !alternateBase; - previousRow = row; - } - - d->delegateForIndex(*it)->paint(&painter, option, *it); - } - -#ifndef QT_NO_DRAGANDDROP - d->commonListView->paintDragDrop(&painter); -#endif - -#ifndef QT_NO_RUBBERBAND - // #### move this implementation into a dynamic class - if (d->showElasticBand && d->elasticBand.isValid()) { - QStyleOptionRubberBand opt; - opt.initFrom(this); - opt.shape = QRubberBand::Rectangle; - opt.opaque = false; - opt.rect = d->mapToViewport(d->elasticBand, false).intersected( - d->viewport->rect().adjusted(-16, -16, 16, 16)); - painter.save(); - style()->drawControl(QStyle::CE_RubberBand, &opt, &painter); - painter.restore(); - } -#endif -} - -/*! - \reimp -*/ -QModelIndex QListView::indexAt(const QPoint &p) const -{ - Q_D(const QListView); - QRect rect(p.x() + horizontalOffset(), p.y() + verticalOffset(), 1, 1); - const QVector<QModelIndex> intersectVector = d->intersectingSet(rect); - QModelIndex index = intersectVector.count() > 0 - ? intersectVector.last() : QModelIndex(); - if (index.isValid() && visualRect(index).contains(p)) - return index; - return QModelIndex(); -} - -/*! - \reimp -*/ -int QListView::horizontalOffset() const -{ - return d_func()->commonListView->horizontalOffset(); -} - -/*! - \reimp -*/ -int QListView::verticalOffset() const -{ - return d_func()->commonListView->verticalOffset(); -} - -/*! - \reimp -*/ -QModelIndex QListView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers) -{ - Q_D(QListView); - Q_UNUSED(modifiers); - - QModelIndex current = currentIndex(); - if (!current.isValid()) { - int rowCount = d->model->rowCount(d->root); - if (!rowCount) - return QModelIndex(); - int row = 0; - while (row < rowCount && d->isHiddenOrDisabled(row)) - ++row; - if (row >= rowCount) - return QModelIndex(); - return d->model->index(row, d->column, d->root); - } - - const QRect initialRect = rectForIndex(current); - QRect rect = initialRect; - if (rect.isEmpty()) { - return d->model->index(0, d->column, d->root); - } - if (d->gridSize().isValid()) rect.setSize(d->gridSize()); - - QSize contents = d->contentsSize(); - QVector<QModelIndex> intersectVector; - - switch (cursorAction) { - case MoveLeft: - while (intersectVector.isEmpty()) { - rect.translate(-rect.width(), 0); - if (rect.right() <= 0) - return current; - if (rect.left() < 0) - rect.setLeft(0); - intersectVector = d->intersectingSet(rect); - d->removeCurrentAndDisabled(&intersectVector, current); - } - return d->closestIndex(initialRect, intersectVector); - case MoveRight: - while (intersectVector.isEmpty()) { - rect.translate(rect.width(), 0); - if (rect.left() >= contents.width()) - return current; - if (rect.right() > contents.width()) - rect.setRight(contents.width()); - intersectVector = d->intersectingSet(rect); - d->removeCurrentAndDisabled(&intersectVector, current); - } - return d->closestIndex(initialRect, intersectVector); - case MovePageUp: - // move current by (visibileRowCount - 1) items. - // rect.translate(0, -rect.height()); will happen in the switch fallthrough for MoveUp. - rect.moveTop(rect.top() - d->viewport->height() + 2 * rect.height()); - if (rect.top() < rect.height()) - rect.moveTop(rect.height()); - case MovePrevious: - case MoveUp: - while (intersectVector.isEmpty()) { - rect.translate(0, -rect.height()); - if (rect.bottom() <= 0) { -#ifdef QT_KEYPAD_NAVIGATION - if (QApplication::keypadNavigationEnabled()) { - int row = d->batchStartRow() - 1; - while (row >= 0 && d->isHiddenOrDisabled(row)) - --row; - if (row >= 0) - return d->model->index(row, d->column, d->root); - } -#endif - return current; - } - if (rect.top() < 0) - rect.setTop(0); - intersectVector = d->intersectingSet(rect); - d->removeCurrentAndDisabled(&intersectVector, current); - } - return d->closestIndex(initialRect, intersectVector); - case MovePageDown: - // move current by (visibileRowCount - 1) items. - // rect.translate(0, rect.height()); will happen in the switch fallthrough for MoveDown. - rect.moveTop(rect.top() + d->viewport->height() - 2 * rect.height()); - if (rect.bottom() > contents.height() - rect.height()) - rect.moveBottom(contents.height() - rect.height()); - case MoveNext: - case MoveDown: - while (intersectVector.isEmpty()) { - rect.translate(0, rect.height()); - if (rect.top() >= contents.height()) { -#ifdef QT_KEYPAD_NAVIGATION - if (QApplication::keypadNavigationEnabled()) { - int rowCount = d->model->rowCount(d->root); - int row = 0; - while (row < rowCount && d->isHiddenOrDisabled(row)) - ++row; - if (row < rowCount) - return d->model->index(row, d->column, d->root); - } -#endif - return current; - } - if (rect.bottom() > contents.height()) - rect.setBottom(contents.height()); - intersectVector = d->intersectingSet(rect); - d->removeCurrentAndDisabled(&intersectVector, current); - } - return d->closestIndex(initialRect, intersectVector); - case MoveHome: - return d->model->index(0, d->column, d->root); - case MoveEnd: - return d->model->index(d->batchStartRow() - 1, d->column, d->root);} - - return current; -} - -/*! - Returns the rectangle of the item at position \a index in the - model. The rectangle is in contents coordinates. - - \sa visualRect() -*/ -QRect QListView::rectForIndex(const QModelIndex &index) const -{ - return d_func()->rectForIndex(index); -} - -/*! - \since 4.1 - - Sets the contents position of the item at \a index in the model to the given - \a position. - If the list view's movement mode is Static or its view mode is ListView, - this function will have no effect. -*/ -void QListView::setPositionForIndex(const QPoint &position, const QModelIndex &index) -{ - Q_D(QListView); - if (d->movement == Static - || !d->isIndexValid(index) - || index.parent() != d->root - || index.column() != d->column) - return; - - d->executePostedLayout(); - d->commonListView->setPositionForIndex(position, index); -} - -/*! - \reimp -*/ -void QListView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command) -{ - Q_D(QListView); - if (!d->selectionModel) - return; - - // if we are wrapping, we can only selecte inside the contents rectangle - int w = qMax(d->contentsSize().width(), d->viewport->width()); - int h = qMax(d->contentsSize().height(), d->viewport->height()); - if (d->wrap && !QRect(0, 0, w, h).intersects(rect)) - return; - - QItemSelection selection; - - if (rect.width() == 1 && rect.height() == 1) { - const QVector<QModelIndex> intersectVector = d->intersectingSet(rect.translated(horizontalOffset(), verticalOffset())); - QModelIndex tl; - if (!intersectVector.isEmpty()) - tl = intersectVector.last(); // special case for mouse press; only select the top item - if (tl.isValid() && d->isIndexEnabled(tl)) - selection.select(tl, tl); - } else { - if (state() == DragSelectingState) { // visual selection mode (rubberband selection) - selection = d->selection(rect.translated(horizontalOffset(), verticalOffset())); - } else { // logical selection mode (key and mouse click selection) - QModelIndex tl, br; - // get the first item - const QRect topLeft(rect.left() + horizontalOffset(), rect.top() + verticalOffset(), 1, 1); - QVector<QModelIndex> intersectVector = d->intersectingSet(topLeft); - if (!intersectVector.isEmpty()) - tl = intersectVector.last(); - // get the last item - const QRect bottomRight(rect.right() + horizontalOffset(), rect.bottom() + verticalOffset(), 1, 1); - intersectVector = d->intersectingSet(bottomRight); - if (!intersectVector.isEmpty()) - br = intersectVector.last(); - - // get the ranges - if (tl.isValid() && br.isValid() - && d->isIndexEnabled(tl) - && d->isIndexEnabled(br)) { - QRect first = rectForIndex(tl); - QRect last = rectForIndex(br); - QRect middle; - if (d->flow == LeftToRight) { - QRect &top = first; - QRect &bottom = last; - // if bottom is above top, swap them - if (top.center().y() > bottom.center().y()) { - QRect tmp = top; - top = bottom; - bottom = tmp; - } - // if the rect are on differnet lines, expand - if (top.top() != bottom.top()) { - // top rectangle - if (isRightToLeft()) - top.setLeft(0); - else - top.setRight(contentsSize().width()); - // bottom rectangle - if (isRightToLeft()) - bottom.setRight(contentsSize().width()); - else - bottom.setLeft(0); - } else if (top.left() > bottom.right()) { - if (isRightToLeft()) - bottom.setLeft(top.right()); - else - bottom.setRight(top.left()); - } else { - if (isRightToLeft()) - top.setLeft(bottom.right()); - else - top.setRight(bottom.left()); - } - // middle rectangle - if (top.bottom() < bottom.top()) { - if (gridSize().isValid() && !gridSize().isNull()) - middle.setTop(top.top() + gridSize().height()); - else - middle.setTop(top.bottom() + 1); - middle.setLeft(qMin(top.left(), bottom.left())); - middle.setBottom(bottom.top() - 1); - middle.setRight(qMax(top.right(), bottom.right())); - } - } else { // TopToBottom - QRect &left = first; - QRect &right = last; - if (left.center().x() > right.center().x()) - qSwap(left, right); - - int ch = contentsSize().height(); - if (left.left() != right.left()) { - // left rectangle - if (isRightToLeft()) - left.setTop(0); - else - left.setBottom(ch); - - // top rectangle - if (isRightToLeft()) - right.setBottom(ch); - else - right.setTop(0); - // only set middle if the - middle.setTop(0); - middle.setBottom(ch); - if (gridSize().isValid() && !gridSize().isNull()) - middle.setLeft(left.left() + gridSize().width()); - else - middle.setLeft(left.right() + 1); - middle.setRight(right.left() - 1); - } else if (left.bottom() < right.top()) { - left.setBottom(right.top() - 1); - } else { - right.setBottom(left.top() - 1); - } - } - - // do the selections - QItemSelection topSelection = d->selection(first); - QItemSelection middleSelection = d->selection(middle); - QItemSelection bottomSelection = d->selection(last); - // merge - selection.merge(topSelection, QItemSelectionModel::Select); - selection.merge(middleSelection, QItemSelectionModel::Select); - selection.merge(bottomSelection, QItemSelectionModel::Select); - } - } - } - - d->selectionModel->select(selection, command); -} - -/*! - \reimp - - Since 4.7, the returned region only contains rectangles intersecting - (or included in) the viewport. -*/ -QRegion QListView::visualRegionForSelection(const QItemSelection &selection) const -{ - Q_D(const QListView); - // ### NOTE: this is a potential bottleneck in non-static mode - int c = d->column; - QRegion selectionRegion; - const QRect &viewportRect = d->viewport->rect(); - for (int i = 0; i < selection.count(); ++i) { - if (!selection.at(i).isValid()) - continue; - QModelIndex parent = selection.at(i).topLeft().parent(); - //we only display the children of the root in a listview - //we're not interested in the other model indexes - if (parent != d->root) - continue; - int t = selection.at(i).topLeft().row(); - int b = selection.at(i).bottomRight().row(); - if (d->viewMode == IconMode || d->isWrapping()) { // in non-static mode, we have to go through all selected items - for (int r = t; r <= b; ++r) { - const QRect &rect = visualRect(d->model->index(r, c, parent)); - if (viewportRect.intersects(rect)) - selectionRegion += rect; - } - } else { // in static mode, we can optimize a bit - while (t <= b && d->isHidden(t)) ++t; - while (b >= t && d->isHidden(b)) --b; - const QModelIndex top = d->model->index(t, c, parent); - const QModelIndex bottom = d->model->index(b, c, parent); - QRect rect(visualRect(top).topLeft(), - visualRect(bottom).bottomRight()); - if (viewportRect.intersects(rect)) - selectionRegion += rect; - } - } - - return selectionRegion; -} - -/*! - \reimp -*/ -QModelIndexList QListView::selectedIndexes() const -{ - Q_D(const QListView); - if (!d->selectionModel) - return QModelIndexList(); - - QModelIndexList viewSelected = d->selectionModel->selectedIndexes(); - for (int i = 0; i < viewSelected.count(); ++i) { - const QModelIndex &index = viewSelected.at(i); - if (!isIndexHidden(index) && index.parent() == d->root && index.column() == d->column) - ++i; - else - viewSelected.removeAt(i); - } - return viewSelected; -} - -/*! - \internal - - Layout the items according to the flow and wrapping properties. -*/ -void QListView::doItemsLayout() -{ - Q_D(QListView); - // showing the scroll bars will trigger a resize event, - // so we set the state to expanding to avoid - // triggering another layout - QAbstractItemView::State oldState = state(); - setState(ExpandingState); - if (d->model->columnCount(d->root) > 0) { // no columns means no contents - d->resetBatchStartRow(); - if (layoutMode() == SinglePass) - d->doItemsLayout(d->model->rowCount(d->root)); // layout everything - else if (!d->batchLayoutTimer.isActive()) { - if (!d->doItemsLayout(d->batchSize)) // layout is done - d->batchLayoutTimer.start(0, this); // do a new batch as fast as possible - } - } - QAbstractItemView::doItemsLayout(); - setState(oldState); // restoring the oldState -} - -/*! - \reimp -*/ -void QListView::updateGeometries() -{ - Q_D(QListView); - if (d->model->rowCount(d->root) <= 0 || d->model->columnCount(d->root) <= 0) { - horizontalScrollBar()->setRange(0, 0); - verticalScrollBar()->setRange(0, 0); - } else { - QModelIndex index = d->model->index(0, d->column, d->root); - QStyleOptionViewItemV4 option = d->viewOptionsV4(); - QSize step = d->itemSize(option, index); - d->commonListView->updateHorizontalScrollBar(step); - d->commonListView->updateVerticalScrollBar(step); - } - - QAbstractItemView::updateGeometries(); - - // if the scroll bars are turned off, we resize the contents to the viewport - if (d->movement == Static && !d->isWrapping()) { - const QSize maxSize = maximumViewportSize(); - if (d->flow == TopToBottom) { - if (horizontalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) { - d->setContentsSize(maxSize.width(), contentsSize().height()); - horizontalScrollBar()->setRange(0, 0); // we see all the contents anyway - } - } else { // LeftToRight - if (verticalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) { - d->setContentsSize(contentsSize().width(), maxSize.height()); - verticalScrollBar()->setRange(0, 0); // we see all the contents anyway - } - } - } - -} - -/*! - \reimp -*/ -bool QListView::isIndexHidden(const QModelIndex &index) const -{ - Q_D(const QListView); - return (d->isHidden(index.row()) - && (index.parent() == d->root) - && index.column() == d->column); -} - -/*! - \property QListView::modelColumn - \brief the column in the model that is visible - - By default, this property contains 0, indicating that the first - column in the model will be shown. -*/ -void QListView::setModelColumn(int column) -{ - Q_D(QListView); - if (column < 0 || column >= d->model->columnCount(d->root)) - return; - d->column = column; - d->doDelayedItemsLayout(); -} - -int QListView::modelColumn() const -{ - Q_D(const QListView); - return d->column; -} - -/*! - \property QListView::uniformItemSizes - \brief whether all items in the listview have the same size - \since 4.1 - - This property should only be set to true if it is guaranteed that all items - in the view have the same size. This enables the view to do some - optimizations for performance purposes. - - By default, this property is false. -*/ -void QListView::setUniformItemSizes(bool enable) -{ - Q_D(QListView); - d->uniformItemSizes = enable; -} - -bool QListView::uniformItemSizes() const -{ - Q_D(const QListView); - return d->uniformItemSizes; -} - -/*! - \property QListView::wordWrap - \brief the item text word-wrapping policy - \since 4.2 - - If this property is true then the item text is wrapped where - necessary at word-breaks; otherwise it is not wrapped at all. - This property is false by default. - - Please note that even if wrapping is enabled, the cell will not be - expanded to make room for the text. It will print ellipsis for - text that cannot be shown, according to the view's - \l{QAbstractItemView::}{textElideMode}. -*/ -void QListView::setWordWrap(bool on) -{ - Q_D(QListView); - if (d->wrapItemText == on) - return; - d->wrapItemText = on; - d->doDelayedItemsLayout(); -} - -bool QListView::wordWrap() const -{ - Q_D(const QListView); - return d->wrapItemText; -} - -/*! - \property QListView::selectionRectVisible - \brief if the selection rectangle should be visible - \since 4.3 - - If this property is true then the selection rectangle is visible; - otherwise it will be hidden. - - \note The selection rectangle will only be visible if the selection mode - is in a mode where more than one item can be selected; i.e., it will not - draw a selection rectangle if the selection mode is - QAbstractItemView::SingleSelection. - - By default, this property is false. -*/ -void QListView::setSelectionRectVisible(bool show) -{ - Q_D(QListView); - d->modeProperties |= uint(QListViewPrivate::SelectionRectVisible); - d->setSelectionRectVisible(show); -} - -bool QListView::isSelectionRectVisible() const -{ - Q_D(const QListView); - return d->isSelectionRectVisible(); -} - -/*! - \reimp -*/ -bool QListView::event(QEvent *e) -{ - return QAbstractItemView::event(e); -} - -/* - * private object implementation - */ - -QListViewPrivate::QListViewPrivate() - : QAbstractItemViewPrivate(), - commonListView(0), - wrap(false), - space(0), - flow(QListView::TopToBottom), - movement(QListView::Static), - resizeMode(QListView::Fixed), - layoutMode(QListView::SinglePass), - viewMode(QListView::ListMode), - modeProperties(0), - column(0), - uniformItemSizes(false), - batchSize(100), - showElasticBand(false) -{ -} - -QListViewPrivate::~QListViewPrivate() -{ - delete commonListView; -} - -void QListViewPrivate::clear() -{ - // initialization of data structs - cachedItemSize = QSize(); - commonListView->clear(); -} - -void QListViewPrivate::prepareItemsLayout() -{ - Q_Q(QListView); - clear(); - - //take the size as if there were scrollbar in order to prevent scrollbar to blink - layoutBounds = QRect(QPoint(), q->maximumViewportSize()); - - int frameAroundContents = 0; - if (q->style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents)) - frameAroundContents = q->style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2; - - // maximumViewportSize() already takes scrollbar into account if policy is - // Qt::ScrollBarAlwaysOn but scrollbar extent must be deduced if policy - // is Qt::ScrollBarAsNeeded - int verticalMargin = vbarpolicy==Qt::ScrollBarAsNeeded - ? q->style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, vbar) + frameAroundContents - : 0; - int horizontalMargin = hbarpolicy==Qt::ScrollBarAsNeeded - ? q->style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, hbar) + frameAroundContents - : 0; - - layoutBounds.adjust(0, 0, -verticalMargin, -horizontalMargin); - - int rowCount = model->columnCount(root) <= 0 ? 0 : model->rowCount(root); - commonListView->setRowCount(rowCount); -} - -/*! - \internal -*/ -bool QListViewPrivate::doItemsLayout(int delta) -{ - int max = model->rowCount(root) - 1; - int first = batchStartRow(); - int last = qMin(first + delta - 1, max); - - if (first == 0) { - layoutChildren(); // make sure the viewport has the right size - prepareItemsLayout(); - } - - if (max < 0 || last < first) { - return true; // nothing to do - } - - QListViewLayoutInfo info; - info.bounds = layoutBounds; - info.grid = gridSize(); - info.spacing = (info.grid.isValid() ? 0 : spacing()); - info.first = first; - info.last = last; - info.wrap = isWrapping(); - info.flow = flow; - info.max = max; - - return commonListView->doBatchedItemLayout(info, max); -} - -QListViewItem QListViewPrivate::indexToListViewItem(const QModelIndex &index) const -{ - if (!index.isValid() || isHidden(index.row())) - return QListViewItem(); - - return commonListView->indexToListViewItem(index); -} - -QRect QListViewPrivate::mapToViewport(const QRect &rect, bool extend) const -{ - Q_Q(const QListView); - if (!rect.isValid()) - return rect; - - QRect result = extend ? commonListView->mapToViewport(rect) : rect; - int dx = -q->horizontalOffset(); - int dy = -q->verticalOffset(); - return result.adjusted(dx, dy, dx, dy); -} - -QModelIndex QListViewPrivate::closestIndex(const QRect &target, - const QVector<QModelIndex> &candidates) const -{ - int distance = 0; - int shortest = INT_MAX; - QModelIndex closest; - QVector<QModelIndex>::const_iterator it = candidates.begin(); - - for (; it != candidates.end(); ++it) { - if (!(*it).isValid()) - continue; - - const QRect indexRect = indexToListViewItem(*it).rect(); - - //if the center x (or y) position of an item is included in the rect of the other item, - //we define the distance between them as the difference in x (or y) of their respective center. - // Otherwise, we use the nahattan length between the 2 items - if ((target.center().x() >= indexRect.x() && target.center().x() < indexRect.right()) - || (indexRect.center().x() >= target.x() && indexRect.center().x() < target.right())) { - //one item's center is at the vertical of the other - distance = qAbs(indexRect.center().y() - target.center().y()); - } else if ((target.center().y() >= indexRect.y() && target.center().y() < indexRect.bottom()) - || (indexRect.center().y() >= target.y() && indexRect.center().y() < target.bottom())) { - //one item's center is at the vertical of the other - distance = qAbs(indexRect.center().x() - target.center().x()); - } else { - distance = (indexRect.center() - target.center()).manhattanLength(); - } - if (distance < shortest) { - shortest = distance; - closest = *it; - } - } - return closest; -} - -QSize QListViewPrivate::itemSize(const QStyleOptionViewItem &option, const QModelIndex &index) const -{ - if (!uniformItemSizes) { - const QAbstractItemDelegate *delegate = delegateForIndex(index); - return delegate ? delegate->sizeHint(option, index) : QSize(); - } - if (!cachedItemSize.isValid()) { // the last item is probaly the largest, so we use its size - int row = model->rowCount(root) - 1; - QModelIndex sample = model->index(row, column, root); - const QAbstractItemDelegate *delegate = delegateForIndex(sample); - cachedItemSize = delegate ? delegate->sizeHint(option, sample) : QSize(); - } - return cachedItemSize; -} - -QItemSelection QListViewPrivate::selection(const QRect &rect) const -{ - QItemSelection selection; - QModelIndex tl, br; - const QVector<QModelIndex> intersectVector = intersectingSet(rect); - QVector<QModelIndex>::const_iterator it = intersectVector.begin(); - for (; it != intersectVector.end(); ++it) { - if (!tl.isValid() && !br.isValid()) { - tl = br = *it; - } else if ((*it).row() == (tl.row() - 1)) { - tl = *it; // expand current range - } else if ((*it).row() == (br.row() + 1)) { - br = (*it); // expand current range - } else { - selection.select(tl, br); // select current range - tl = br = *it; // start new range - } - } - - if (tl.isValid() && br.isValid()) - selection.select(tl, br); - else if (tl.isValid()) - selection.select(tl, tl); - else if (br.isValid()) - selection.select(br, br); - - return selection; -} - -#ifndef QT_NO_DRAGANDDROP -QAbstractItemView::DropIndicatorPosition QListViewPrivate::position(const QPoint &pos, const QRect &rect, const QModelIndex &idx) const -{ - if (viewMode == QListView::ListMode && flow == QListView::LeftToRight) - return static_cast<QListModeViewBase *>(commonListView)->position(pos, rect, idx); - else - return QAbstractItemViewPrivate::position(pos, rect, idx); -} - -bool QListViewPrivate::dropOn(QDropEvent *event, int *dropRow, int *dropCol, QModelIndex *dropIndex) -{ - if (viewMode == QListView::ListMode && flow == QListView::LeftToRight) - return static_cast<QListModeViewBase *>(commonListView)->dropOn(event, dropRow, dropCol, dropIndex); - else - return QAbstractItemViewPrivate::dropOn(event, dropRow, dropCol, dropIndex); -} -#endif - -/* - * Common ListView Implementation -*/ - -void QCommonListViewBase::appendHiddenRow(int row) -{ - dd->hiddenRows.insert(dd->model->index(row, 0, qq->rootIndex())); -} - -void QCommonListViewBase::removeHiddenRow(int row) -{ - dd->hiddenRows.remove(dd->model->index(row, 0, qq->rootIndex())); -} - -void QCommonListViewBase::updateHorizontalScrollBar(const QSize &step) -{ - horizontalScrollBar()->setSingleStep(step.width() + spacing()); - horizontalScrollBar()->setPageStep(viewport()->width()); - horizontalScrollBar()->setRange(0, contentsSize.width() - viewport()->width()); -} - -void QCommonListViewBase::updateVerticalScrollBar(const QSize &step) -{ - verticalScrollBar()->setSingleStep(step.height() + spacing()); - verticalScrollBar()->setPageStep(viewport()->height()); - verticalScrollBar()->setRange(0, contentsSize.height() - viewport()->height()); -} - -void QCommonListViewBase::scrollContentsBy(int dx, int dy, bool /*scrollElasticBand*/) -{ - dd->scrollContentsBy(isRightToLeft() ? -dx : dx, dy); -} - -int QCommonListViewBase::verticalScrollToValue(int /*index*/, QListView::ScrollHint hint, - bool above, bool below, const QRect &area, const QRect &rect) const -{ - int verticalValue = verticalScrollBar()->value(); - QRect adjusted = rect.adjusted(-spacing(), -spacing(), spacing(), spacing()); - if (hint == QListView::PositionAtTop || above) - verticalValue += adjusted.top(); - else if (hint == QListView::PositionAtBottom || below) - verticalValue += qMin(adjusted.top(), adjusted.bottom() - area.height() + 1); - else if (hint == QListView::PositionAtCenter) - verticalValue += adjusted.top() - ((area.height() - adjusted.height()) / 2); - return verticalValue; -} - -int QCommonListViewBase::horizontalOffset() const -{ - return (isRightToLeft() ? horizontalScrollBar()->maximum() - horizontalScrollBar()->value() : horizontalScrollBar()->value()); -} - -int QCommonListViewBase::horizontalScrollToValue(const int /*index*/, QListView::ScrollHint hint, - bool leftOf, bool rightOf, const QRect &area, const QRect &rect) const -{ - int horizontalValue = horizontalScrollBar()->value(); - if (isRightToLeft()) { - if (hint == QListView::PositionAtCenter) { - horizontalValue += ((area.width() - rect.width()) / 2) - rect.left(); - } else { - if (leftOf) - horizontalValue -= rect.left(); - else if (rightOf) - horizontalValue += qMin(rect.left(), area.width() - rect.right()); - } - } else { - if (hint == QListView::PositionAtCenter) { - horizontalValue += rect.left() - ((area.width()- rect.width()) / 2); - } else { - if (leftOf) - horizontalValue += rect.left(); - else if (rightOf) - horizontalValue += qMin(rect.left(), rect.right() - area.width()); - } - } - return horizontalValue; -} - -/* - * ListMode ListView Implementation -*/ - -#ifndef QT_NO_DRAGANDDROP -void QListModeViewBase::paintDragDrop(QPainter *painter) -{ - // FIXME: Until the we can provide a proper drop indicator - // in IconMode, it makes no sense to show it - dd->paintDropIndicator(painter); -} - -QAbstractItemView::DropIndicatorPosition QListModeViewBase::position(const QPoint &pos, const QRect &rect, const QModelIndex &index) const -{ - QAbstractItemView::DropIndicatorPosition r = QAbstractItemView::OnViewport; - if (!dd->overwrite) { - const int margin = 2; - if (pos.x() - rect.left() < margin) { - r = QAbstractItemView::AboveItem; // Visually, on the left - } else if (rect.right() - pos.x() < margin) { - r = QAbstractItemView::BelowItem; // Visually, on the right - } else if (rect.contains(pos, true)) { - r = QAbstractItemView::OnItem; - } - } else { - QRect touchingRect = rect; - touchingRect.adjust(-1, -1, 1, 1); - if (touchingRect.contains(pos, false)) { - r = QAbstractItemView::OnItem; - } - } - - if (r == QAbstractItemView::OnItem && (!(dd->model->flags(index) & Qt::ItemIsDropEnabled))) - r = pos.x() < rect.center().x() ? QAbstractItemView::AboveItem : QAbstractItemView::BelowItem; - - return r; -} - -void QListModeViewBase::dragMoveEvent(QDragMoveEvent *event) -{ - if (qq->dragDropMode() == QAbstractItemView::InternalMove - && (event->source() != qq || !(event->possibleActions() & Qt::MoveAction))) - return; - - // ignore by default - event->ignore(); - - // can't use indexAt, doesn't account for spacing. - QPoint p = event->pos(); - QRect rect(p.x() + horizontalOffset(), p.y() + verticalOffset(), 1, 1); - rect.adjust(-dd->spacing(), -dd->spacing(), dd->spacing(), dd->spacing()); - const QVector<QModelIndex> intersectVector = dd->intersectingSet(rect); - QModelIndex index = intersectVector.count() > 0 - ? intersectVector.last() : QModelIndex(); - dd->hover = index; - if (!dd->droppingOnItself(event, index) - && dd->canDecode(event)) { - - if (index.isValid() && dd->showDropIndicator) { - QRect rect = qq->visualRect(index); - dd->dropIndicatorPosition = position(event->pos(), rect, index); - // if spacing, should try to draw between items, not just next to item. - switch (dd->dropIndicatorPosition) { - case QAbstractItemView::AboveItem: - if (dd->isIndexDropEnabled(index.parent())) { - dd->dropIndicatorRect = QRect(rect.left()-dd->spacing(), rect.top(), 0, rect.height()); - event->accept(); - } else { - dd->dropIndicatorRect = QRect(); - } - break; - case QAbstractItemView::BelowItem: - if (dd->isIndexDropEnabled(index.parent())) { - dd->dropIndicatorRect = QRect(rect.right()+dd->spacing(), rect.top(), 0, rect.height()); - event->accept(); - } else { - dd->dropIndicatorRect = QRect(); - } - break; - case QAbstractItemView::OnItem: - if (dd->isIndexDropEnabled(index)) { - dd->dropIndicatorRect = rect; - event->accept(); - } else { - dd->dropIndicatorRect = QRect(); - } - break; - case QAbstractItemView::OnViewport: - dd->dropIndicatorRect = QRect(); - if (dd->isIndexDropEnabled(qq->rootIndex())) { - event->accept(); // allow dropping in empty areas - } - break; - } - } else { - dd->dropIndicatorRect = QRect(); - dd->dropIndicatorPosition = QAbstractItemView::OnViewport; - if (dd->isIndexDropEnabled(qq->rootIndex())) { - event->accept(); // allow dropping in empty areas - } - } - dd->viewport->update(); - } // can decode - - if (dd->shouldAutoScroll(event->pos())) - qq->startAutoScroll(); -} - -/*! - If the event hasn't already been accepted, determines the index to drop on. - - if (row == -1 && col == -1) - // append to this drop index - else - // place at row, col in drop index - - If it returns true a drop can be done, and dropRow, dropCol and dropIndex reflects the position of the drop. - \internal - */ -bool QListModeViewBase::dropOn(QDropEvent *event, int *dropRow, int *dropCol, QModelIndex *dropIndex) -{ - if (event->isAccepted()) - return false; - - QModelIndex index; - if (dd->viewport->rect().contains(event->pos())) { - // can't use indexAt, doesn't account for spacing. - QPoint p = event->pos(); - QRect rect(p.x() + horizontalOffset(), p.y() + verticalOffset(), 1, 1); - rect.adjust(-dd->spacing(), -dd->spacing(), dd->spacing(), dd->spacing()); - const QVector<QModelIndex> intersectVector = dd->intersectingSet(rect); - index = intersectVector.count() > 0 - ? intersectVector.last() : QModelIndex(); - if (!index.isValid()) - index = dd->root; - } - - // If we are allowed to do the drop - if (dd->model->supportedDropActions() & event->dropAction()) { - int row = -1; - int col = -1; - if (index != dd->root) { - dd->dropIndicatorPosition = position(event->pos(), qq->visualRect(index), index); - switch (dd->dropIndicatorPosition) { - case QAbstractItemView::AboveItem: - row = index.row(); - col = index.column(); - index = index.parent(); - break; - case QAbstractItemView::BelowItem: - row = index.row() + 1; - col = index.column(); - index = index.parent(); - break; - case QAbstractItemView::OnItem: - case QAbstractItemView::OnViewport: - break; - } - } else { - dd->dropIndicatorPosition = QAbstractItemView::OnViewport; - } - *dropIndex = index; - *dropRow = row; - *dropCol = col; - if (!dd->droppingOnItself(event, index)) - return true; - } - return false; -} - -#endif //QT_NO_DRAGANDDROP - -void QListModeViewBase::updateVerticalScrollBar(const QSize &step) -{ - if (verticalScrollMode() == QAbstractItemView::ScrollPerItem - && ((flow() == QListView::TopToBottom && !isWrapping()) - || (flow() == QListView::LeftToRight && isWrapping()))) { - const int steps = (flow() == QListView::TopToBottom ? scrollValueMap : segmentPositions).count() - 1; - if (steps > 0) { - const int pageSteps = perItemScrollingPageSteps(viewport()->height(), contentsSize.height(), isWrapping()); - verticalScrollBar()->setSingleStep(1); - verticalScrollBar()->setPageStep(pageSteps); - verticalScrollBar()->setRange(0, steps - pageSteps); - } else { - verticalScrollBar()->setRange(0, 0); - } - // } else if (vertical && d->isWrapping() && d->movement == Static) { - // ### wrapped scrolling in flow direction - } else { - QCommonListViewBase::updateVerticalScrollBar(step); - } -} - -void QListModeViewBase::updateHorizontalScrollBar(const QSize &step) -{ - if (horizontalScrollMode() == QAbstractItemView::ScrollPerItem - && ((flow() == QListView::TopToBottom && isWrapping()) - || (flow() == QListView::LeftToRight && !isWrapping()))) { - int steps = (flow() == QListView::TopToBottom ? segmentPositions : scrollValueMap).count() - 1; - if (steps > 0) { - const int pageSteps = perItemScrollingPageSteps(viewport()->width(), contentsSize.width(), isWrapping()); - horizontalScrollBar()->setSingleStep(1); - horizontalScrollBar()->setPageStep(pageSteps); - horizontalScrollBar()->setRange(0, steps - pageSteps); - } else { - horizontalScrollBar()->setRange(0, 0); - } - } else { - QCommonListViewBase::updateHorizontalScrollBar(step); - } -} - -int QListModeViewBase::verticalScrollToValue(int index, QListView::ScrollHint hint, - bool above, bool below, const QRect &area, const QRect &rect) const -{ - if (verticalScrollMode() == QAbstractItemView::ScrollPerItem) { - int value; - if (scrollValueMap.isEmpty()) - value = 0; - else - value = qBound(0, scrollValueMap.at(verticalScrollBar()->value()), flowPositions.count() - 1); - if (above) - hint = QListView::PositionAtTop; - else if (below) - hint = QListView::PositionAtBottom; - if (hint == QListView::EnsureVisible) - return value; - - return perItemScrollToValue(index, value, area.height(), hint, Qt::Vertical, isWrapping(), rect.height()); - } - - return QCommonListViewBase::verticalScrollToValue(index, hint, above, below, area, rect); -} - -int QListModeViewBase::horizontalOffset() const -{ - if (horizontalScrollMode() == QAbstractItemView::ScrollPerItem) { - if (isWrapping()) { - if (flow() == QListView::TopToBottom && !segmentPositions.isEmpty()) { - const int max = segmentPositions.count() - 1; - int currentValue = qBound(0, horizontalScrollBar()->value(), max); - int position = segmentPositions.at(currentValue); - int maximumValue = qBound(0, horizontalScrollBar()->maximum(), max); - int maximum = segmentPositions.at(maximumValue); - return (isRightToLeft() ? maximum - position : position); - } - } else if (flow() == QListView::LeftToRight && !flowPositions.isEmpty()) { - int position = flowPositions.at(scrollValueMap.at(horizontalScrollBar()->value())); - int maximum = flowPositions.at(scrollValueMap.at(horizontalScrollBar()->maximum())); - return (isRightToLeft() ? maximum - position : position); - } - } - return QCommonListViewBase::horizontalOffset(); -} - -int QListModeViewBase::verticalOffset() const -{ - if (verticalScrollMode() == QAbstractItemView::ScrollPerItem) { - if (isWrapping()) { - if (flow() == QListView::LeftToRight && !segmentPositions.isEmpty()) { - int value = verticalScrollBar()->value(); - if (value >= segmentPositions.count()) - return 0; - return segmentPositions.at(value) - spacing(); - } - } else if (flow() == QListView::TopToBottom && !flowPositions.isEmpty()) { - int value = verticalScrollBar()->value(); - if (value > scrollValueMap.count()) - return 0; - return flowPositions.at(scrollValueMap.at(value)) - spacing(); - } - } - return QCommonListViewBase::verticalOffset(); -} - -int QListModeViewBase::horizontalScrollToValue(int index, QListView::ScrollHint hint, - bool leftOf, bool rightOf, const QRect &area, const QRect &rect) const -{ - if (horizontalScrollMode() != QAbstractItemView::ScrollPerItem) - return QCommonListViewBase::horizontalScrollToValue(index, hint, leftOf, rightOf, area, rect); - - int value; - if (scrollValueMap.isEmpty()) - value = 0; - else - value = qBound(0, scrollValueMap.at(horizontalScrollBar()->value()), flowPositions.count() - 1); - if (leftOf) - hint = QListView::PositionAtTop; - else if (rightOf) - hint = QListView::PositionAtBottom; - if (hint == QListView::EnsureVisible) - return value; - - return perItemScrollToValue(index, value, area.width(), hint, Qt::Horizontal, isWrapping(), rect.width()); -} - -void QListModeViewBase::scrollContentsBy(int dx, int dy, bool scrollElasticBand) -{ - // ### reorder this logic - const int verticalValue = verticalScrollBar()->value(); - const int horizontalValue = horizontalScrollBar()->value(); - const bool vertical = (verticalScrollMode() == QAbstractItemView::ScrollPerItem); - const bool horizontal = (horizontalScrollMode() == QAbstractItemView::ScrollPerItem); - - if (isWrapping()) { - if (segmentPositions.isEmpty()) - return; - const int max = segmentPositions.count() - 1; - if (horizontal && flow() == QListView::TopToBottom && dx != 0) { - int currentValue = qBound(0, horizontalValue, max); - int previousValue = qBound(0, currentValue + dx, max); - int currentCoordinate = segmentPositions.at(currentValue) - spacing(); - int previousCoordinate = segmentPositions.at(previousValue) - spacing(); - dx = previousCoordinate - currentCoordinate; - } else if (vertical && flow() == QListView::LeftToRight && dy != 0) { - int currentValue = qBound(0, verticalValue, max); - int previousValue = qBound(0, currentValue + dy, max); - int currentCoordinate = segmentPositions.at(currentValue) - spacing(); - int previousCoordinate = segmentPositions.at(previousValue) - spacing(); - dy = previousCoordinate - currentCoordinate; - } - } else { - if (flowPositions.isEmpty()) - return; - const int max = scrollValueMap.count() - 1; - if (vertical && flow() == QListView::TopToBottom && dy != 0) { - int currentValue = qBound(0, verticalValue, max); - int previousValue = qBound(0, currentValue + dy, max); - int currentCoordinate = flowPositions.at(scrollValueMap.at(currentValue)); - int previousCoordinate = flowPositions.at(scrollValueMap.at(previousValue)); - dy = previousCoordinate - currentCoordinate; - } else if (horizontal && flow() == QListView::LeftToRight && dx != 0) { - int currentValue = qBound(0, horizontalValue, max); - int previousValue = qBound(0, currentValue + dx, max); - int currentCoordinate = flowPositions.at(scrollValueMap.at(currentValue)); - int previousCoordinate = flowPositions.at(scrollValueMap.at(previousValue)); - dx = previousCoordinate - currentCoordinate; - } - } - QCommonListViewBase::scrollContentsBy(dx, dy, scrollElasticBand); -} - -bool QListModeViewBase::doBatchedItemLayout(const QListViewLayoutInfo &info, int max) -{ - doStaticLayout(info); - if (batchStartRow > max) { // stop items layout - flowPositions.resize(flowPositions.count()); - segmentPositions.resize(segmentPositions.count()); - segmentStartRows.resize(segmentStartRows.count()); - return true; // done - } - return false; // not done -} - -QListViewItem QListModeViewBase::indexToListViewItem(const QModelIndex &index) const -{ - if (flowPositions.isEmpty() - || segmentPositions.isEmpty() - || index.row() >= flowPositions.count()) - return QListViewItem(); - - const int segment = qBinarySearch<int>(segmentStartRows, index.row(), - 0, segmentStartRows.count() - 1); - - - QStyleOptionViewItemV4 options = viewOptions(); - options.rect.setSize(contentsSize); - QSize size = (uniformItemSizes() && cachedItemSize().isValid()) - ? cachedItemSize() : itemSize(options, index); - - QPoint pos; - if (flow() == QListView::LeftToRight) { - pos.setX(flowPositions.at(index.row())); - pos.setY(segmentPositions.at(segment)); - } else { // TopToBottom - pos.setY(flowPositions.at(index.row())); - pos.setX(segmentPositions.at(segment)); - if (isWrapping()) { // make the items as wide as the segment - int right = (segment + 1 >= segmentPositions.count() - ? contentsSize.width() - : segmentPositions.at(segment + 1)); - size.setWidth(right - pos.x()); - } else { // make the items as wide as the viewport - size.setWidth(qMax(size.width(), viewport()->width())); - } - } - - return QListViewItem(QRect(pos, size), index.row()); -} - -QPoint QListModeViewBase::initStaticLayout(const QListViewLayoutInfo &info) -{ - int x, y; - if (info.first == 0) { - flowPositions.clear(); - segmentPositions.clear(); - segmentStartRows.clear(); - segmentExtents.clear(); - scrollValueMap.clear(); - x = info.bounds.left() + info.spacing; - y = info.bounds.top() + info.spacing; - segmentPositions.append(info.flow == QListView::LeftToRight ? y : x); - segmentStartRows.append(0); - } else if (info.wrap) { - if (info.flow == QListView::LeftToRight) { - x = batchSavedPosition; - y = segmentPositions.last(); - } else { // flow == QListView::TopToBottom - x = segmentPositions.last(); - y = batchSavedPosition; - } - } else { // not first and not wrap - if (info.flow == QListView::LeftToRight) { - x = batchSavedPosition; - y = info.bounds.top() + info.spacing; - } else { // flow == QListView::TopToBottom - x = info.bounds.left() + info.spacing; - y = batchSavedPosition; - } - } - return QPoint(x, y); -} - -/*! - \internal -*/ -void QListModeViewBase::doStaticLayout(const QListViewLayoutInfo &info) -{ - const bool useItemSize = !info.grid.isValid(); - const QPoint topLeft = initStaticLayout(info); - QStyleOptionViewItemV4 option = viewOptions(); - option.rect = info.bounds; - option.rect.adjust(info.spacing, info.spacing, -info.spacing, -info.spacing); - - // The static layout data structures are as follows: - // One vector contains the coordinate in the direction of layout flow. - // Another vector contains the coordinates of the segments. - // A third vector contains the index (model row) of the first item - // of each segment. - - int segStartPosition; - int segEndPosition; - int deltaFlowPosition; - int deltaSegPosition; - int deltaSegHint; - int flowPosition; - int segPosition; - - if (info.flow == QListView::LeftToRight) { - segStartPosition = info.bounds.left(); - segEndPosition = info.bounds.width(); - flowPosition = topLeft.x(); - segPosition = topLeft.y(); - deltaFlowPosition = info.grid.width(); // dx - deltaSegPosition = useItemSize ? batchSavedDeltaSeg : info.grid.height(); // dy - deltaSegHint = info.grid.height(); - } else { // flow == QListView::TopToBottom - segStartPosition = info.bounds.top(); - segEndPosition = info.bounds.height(); - flowPosition = topLeft.y(); - segPosition = topLeft.x(); - deltaFlowPosition = info.grid.height(); // dy - deltaSegPosition = useItemSize ? batchSavedDeltaSeg : info.grid.width(); // dx - deltaSegHint = info.grid.width(); - } - - for (int row = info.first; row <= info.last; ++row) { - if (isHidden(row)) { // ### - flowPositions.append(flowPosition); - } else { - // if we are not using a grid, we need to find the deltas - if (useItemSize) { - QSize hint = itemSize(option, modelIndex(row)); - if (info.flow == QListView::LeftToRight) { - deltaFlowPosition = hint.width() + info.spacing; - deltaSegHint = hint.height() + info.spacing; - } else { // TopToBottom - deltaFlowPosition = hint.height() + info.spacing; - deltaSegHint = hint.width() + info.spacing; - } - } - // create new segment - if (info.wrap && (flowPosition + deltaFlowPosition >= segEndPosition)) { - segmentExtents.append(flowPosition); - flowPosition = info.spacing + segStartPosition; - segPosition += deltaSegPosition; - if (info.wrap) - segPosition += info.spacing; - segmentPositions.append(segPosition); - segmentStartRows.append(row); - deltaSegPosition = 0; - } - // save the flow position of this item - scrollValueMap.append(flowPositions.count()); - flowPositions.append(flowPosition); - // prepare for the next item - deltaSegPosition = qMax(deltaSegHint, deltaSegPosition); - flowPosition += info.spacing + deltaFlowPosition; - } - } - // used when laying out next batch - batchSavedPosition = flowPosition; - batchSavedDeltaSeg = deltaSegPosition; - batchStartRow = info.last + 1; - if (info.last == info.max) - flowPosition -= info.spacing; // remove extra spacing - // set the contents size - QRect rect = info.bounds; - if (info.flow == QListView::LeftToRight) { - rect.setRight(segmentPositions.count() == 1 ? flowPosition : info.bounds.right()); - rect.setBottom(segPosition + deltaSegPosition); - } else { // TopToBottom - rect.setRight(segPosition + deltaSegPosition); - rect.setBottom(segmentPositions.count() == 1 ? flowPosition : info.bounds.bottom()); - } - contentsSize = QSize(rect.right(), rect.bottom()); - // if it is the last batch, save the end of the segments - if (info.last == info.max) { - segmentExtents.append(flowPosition); - scrollValueMap.append(flowPositions.count()); - flowPositions.append(flowPosition); - segmentPositions.append(info.wrap ? segPosition + deltaSegPosition : INT_MAX); - } - // if the new items are visble, update the viewport - QRect changedRect(topLeft, rect.bottomRight()); - if (clipRect().intersects(changedRect)) - viewport()->update(); -} - -/*! - \internal - Finds the set of items intersecting with \a area. - In this function, itemsize is counted from topleft to the start of the next item. -*/ -QVector<QModelIndex> QListModeViewBase::intersectingSet(const QRect &area) const -{ - QVector<QModelIndex> ret; - int segStartPosition; - int segEndPosition; - int flowStartPosition; - int flowEndPosition; - if (flow() == QListView::LeftToRight) { - segStartPosition = area.top(); - segEndPosition = area.bottom(); - flowStartPosition = area.left(); - flowEndPosition = area.right(); - } else { - segStartPosition = area.left(); - segEndPosition = area.right(); - flowStartPosition = area.top(); - flowEndPosition = area.bottom(); - } - if (segmentPositions.count() < 2 || flowPositions.isEmpty()) - return ret; - // the last segment position is actually the edge of the last segment - const int segLast = segmentPositions.count() - 2; - int seg = qBinarySearch<int>(segmentPositions, segStartPosition, 0, segLast + 1); - for (; seg <= segLast && segmentPositions.at(seg) <= segEndPosition; ++seg) { - int first = segmentStartRows.at(seg); - int last = (seg < segLast ? segmentStartRows.at(seg + 1) : batchStartRow) - 1; - if (segmentExtents.at(seg) < flowStartPosition) - continue; - int row = qBinarySearch<int>(flowPositions, flowStartPosition, first, last); - for (; row <= last && flowPositions.at(row) <= flowEndPosition; ++row) { - if (isHidden(row)) - continue; - QModelIndex index = modelIndex(row); - if (index.isValid()) - ret += index; -#if 0 // for debugging - else - qWarning("intersectingSet: row %d was invalid", row); -#endif - } - } - return ret; -} - -void QListModeViewBase::dataChanged(const QModelIndex &, const QModelIndex &) -{ - dd->doDelayedItemsLayout(); -} - - -QRect QListModeViewBase::mapToViewport(const QRect &rect) const -{ - if (isWrapping()) - return rect; - // If the listview is in "listbox-mode", the items are as wide as the view. - // But we don't shrink the items. - QRect result = rect; - if (flow() == QListView::TopToBottom) { - result.setLeft(spacing()); - result.setWidth(qMax(rect.width(), qMax(contentsSize.width(), viewport()->width()) - 2 * spacing())); - } else { // LeftToRight - result.setTop(spacing()); - result.setHeight(qMax(rect.height(), qMax(contentsSize.height(), viewport()->height()) - 2 * spacing())); - } - return result; -} - -int QListModeViewBase::perItemScrollingPageSteps(int length, int bounds, bool wrap) const -{ - QVector<int> positions; - if (wrap) - positions = segmentPositions; - else if (!flowPositions.isEmpty()) { - positions.reserve(scrollValueMap.size()); - foreach (int itemShown, scrollValueMap) - positions.append(flowPositions.at(itemShown)); - } - if (positions.isEmpty() || bounds <= length) - return positions.count(); - if (uniformItemSizes()) { - for (int i = 1; i < positions.count(); ++i) - if (positions.at(i) > 0) - return length / positions.at(i); - return 0; // all items had height 0 - } - int pageSteps = 0; - int steps = positions.count() - 1; - int max = qMax(length, bounds); - int min = qMin(length, bounds); - int pos = min - (max - positions.last()); - - while (pos >= 0 && steps > 0) { - pos -= (positions.at(steps) - positions.at(steps - 1)); - if (pos >= 0) //this item should be visible - ++pageSteps; - --steps; - } - - // at this point we know that positions has at least one entry - return qMax(pageSteps, 1); -} - -int QListModeViewBase::perItemScrollToValue(int index, int scrollValue, int viewportSize, - QAbstractItemView::ScrollHint hint, - Qt::Orientation orientation, bool wrap, int itemExtent) const -{ - if (index < 0) - return scrollValue; - if (!wrap) { - int topIndex = index; - const int bottomIndex = topIndex; - const int bottomCoordinate = flowPositions.at(index); - - while (topIndex > 0 && - (bottomCoordinate - flowPositions.at(topIndex-1) + itemExtent) <= (viewportSize)) { - topIndex--; - } - - const int itemCount = bottomIndex - topIndex + 1; - switch (hint) { - case QAbstractItemView::PositionAtTop: - return index; - case QAbstractItemView::PositionAtBottom: - return index - itemCount + 1; - case QAbstractItemView::PositionAtCenter: - return index - (itemCount / 2); - default: - break; - } - } else { // wrapping - Qt::Orientation flowOrientation = (flow() == QListView::LeftToRight - ? Qt::Horizontal : Qt::Vertical); - if (flowOrientation == orientation) { // scrolling in the "flow" direction - // ### wrapped scrolling in the flow direction - return flowPositions.at(index); // ### always pixel based for now - } else if (!segmentStartRows.isEmpty()) { // we are scrolling in the "segment" direction - int segment = qBinarySearch<int>(segmentStartRows, index, 0, segmentStartRows.count() - 1); - int leftSegment = segment; - const int rightSegment = leftSegment; - const int bottomCoordinate = segmentPositions.at(segment); - - while (leftSegment > scrollValue && - (bottomCoordinate - segmentPositions.at(leftSegment-1) + itemExtent) <= (viewportSize)) { - leftSegment--; - } - - const int segmentCount = rightSegment - leftSegment + 1; - switch (hint) { - case QAbstractItemView::PositionAtTop: - return segment; - case QAbstractItemView::PositionAtBottom: - return segment - segmentCount + 1; - case QAbstractItemView::PositionAtCenter: - return segment - (segmentCount / 2); - default: - break; - } - } - } - return scrollValue; -} - -void QListModeViewBase::clear() -{ - flowPositions.clear(); - segmentPositions.clear(); - segmentStartRows.clear(); - segmentExtents.clear(); - batchSavedPosition = 0; - batchStartRow = 0; - batchSavedDeltaSeg = 0; -} - -/* - * IconMode ListView Implementation -*/ - -void QIconModeViewBase::setPositionForIndex(const QPoint &position, const QModelIndex &index) -{ - if (index.row() >= items.count()) - return; - const QSize oldContents = contentsSize; - qq->update(index); // update old position - moveItem(index.row(), position); - qq->update(index); // update new position - - if (contentsSize != oldContents) - dd->viewUpdateGeometries(); // update the scroll bars -} - -void QIconModeViewBase::appendHiddenRow(int row) -{ - if (row >= 0 && row < items.count()) //remove item - tree.removeLeaf(items.at(row).rect(), row); - QCommonListViewBase::appendHiddenRow(row); -} - -void QIconModeViewBase::removeHiddenRow(int row) -{ - QCommonListViewBase::removeHiddenRow(row); - if (row >= 0 && row < items.count()) //insert item - tree.insertLeaf(items.at(row).rect(), row); -} - -#ifndef QT_NO_DRAGANDDROP -void QIconModeViewBase::paintDragDrop(QPainter *painter) -{ - if (!draggedItems.isEmpty() && viewport()->rect().contains(draggedItemsPos)) { - //we need to draw the items that arre dragged - painter->translate(draggedItemsDelta()); - QStyleOptionViewItemV4 option = viewOptions(); - option.state &= ~QStyle::State_MouseOver; - QVector<QModelIndex>::const_iterator it = draggedItems.begin(); - QListViewItem item = indexToListViewItem(*it); - for (; it != draggedItems.end(); ++it) { - item = indexToListViewItem(*it); - option.rect = viewItemRect(item); - delegate(*it)->paint(painter, option, *it); - } - } -} - -bool QIconModeViewBase::filterStartDrag(Qt::DropActions supportedActions) -{ - // This function does the same thing as in QAbstractItemView::startDrag(), - // plus adding viewitems to the draggedItems list. - // We need these items to draw the drag items - QModelIndexList indexes = dd->selectionModel->selectedIndexes(); - if (indexes.count() > 0 ) { - if (viewport()->acceptDrops()) { - QModelIndexList::ConstIterator it = indexes.constBegin(); - for (; it != indexes.constEnd(); ++it) - if (dd->model->flags(*it) & Qt::ItemIsDragEnabled - && (*it).column() == dd->column) - draggedItems.push_back(*it); - } - QDrag *drag = new QDrag(qq); - drag->setMimeData(dd->model->mimeData(indexes)); - Qt::DropAction action = drag->exec(supportedActions, Qt::CopyAction); - draggedItems.clear(); - if (action == Qt::MoveAction) - dd->clearOrRemove(); - } - return true; -} - -bool QIconModeViewBase::filterDropEvent(QDropEvent *e) -{ - if (e->source() != qq) - return false; - - const QSize contents = contentsSize; - QPoint offset(horizontalOffset(), verticalOffset()); - QPoint end = e->pos() + offset; - if (qq->acceptDrops()) { - const Qt::ItemFlags dropableFlags = Qt::ItemIsDropEnabled|Qt::ItemIsEnabled; - const QVector<QModelIndex> &dropIndices = intersectingSet(QRect(end, QSize(1, 1))); - foreach (const QModelIndex &index, dropIndices) - if ((index.flags() & dropableFlags) == dropableFlags) - return false; - } - QPoint start = dd->pressedPosition; - QPoint delta = (dd->movement == QListView::Snap ? snapToGrid(end) - snapToGrid(start) : end - start); - QList<QModelIndex> indexes = dd->selectionModel->selectedIndexes(); - for (int i = 0; i < indexes.count(); ++i) { - QModelIndex index = indexes.at(i); - QRect rect = dd->rectForIndex(index); - viewport()->update(dd->mapToViewport(rect, false)); - QPoint dest = rect.topLeft() + delta; - if (qq->isRightToLeft()) - dest.setX(dd->flipX(dest.x()) - rect.width()); - moveItem(index.row(), dest); - qq->update(index); - } - dd->stopAutoScroll(); - draggedItems.clear(); - dd->emitIndexesMoved(indexes); - e->accept(); // we have handled the event - // if the size has not grown, we need to check if it has shrinked - if (contentsSize != contents) { - if ((contentsSize.width() <= contents.width() - || contentsSize.height() <= contents.height())) { - updateContentsSize(); - } - dd->viewUpdateGeometries(); - } - return true; -} - -bool QIconModeViewBase::filterDragLeaveEvent(QDragLeaveEvent *e) -{ - viewport()->update(draggedItemsRect()); // erase the area - draggedItemsPos = QPoint(-1, -1); // don't draw the dragged items - return QCommonListViewBase::filterDragLeaveEvent(e); -} - -bool QIconModeViewBase::filterDragMoveEvent(QDragMoveEvent *e) -{ - if (e->source() != qq || !dd->canDecode(e)) - return false; - - // ignore by default - e->ignore(); - // get old dragged items rect - QRect itemsRect = this->itemsRect(draggedItems); - viewport()->update(itemsRect.translated(draggedItemsDelta())); - // update position - draggedItemsPos = e->pos(); - // get new items rect - viewport()->update(itemsRect.translated(draggedItemsDelta())); - // set the item under the cursor to current - QModelIndex index; - if (movement() == QListView::Snap) { - QRect rect(snapToGrid(e->pos() + offset()), gridSize()); - const QVector<QModelIndex> intersectVector = intersectingSet(rect); - index = intersectVector.count() > 0 ? intersectVector.last() : QModelIndex(); - } else { - index = qq->indexAt(e->pos()); - } - // check if we allow drops here - if (draggedItems.contains(index)) - e->accept(); // allow changing item position - else if (dd->model->flags(index) & Qt::ItemIsDropEnabled) - e->accept(); // allow dropping on dropenabled items - else if (!index.isValid()) - e->accept(); // allow dropping in empty areas - - // the event was treated. do autoscrolling - if (dd->shouldAutoScroll(e->pos())) - dd->startAutoScroll(); - return true; -} -#endif // QT_NO_DRAGANDDROP - -void QIconModeViewBase::setRowCount(int rowCount) -{ - tree.create(qMax(rowCount - hiddenCount(), 0)); -} - -void QIconModeViewBase::scrollContentsBy(int dx, int dy, bool scrollElasticBand) -{ - if (scrollElasticBand) - dd->scrollElasticBandBy(isRightToLeft() ? -dx : dx, dy); - - QCommonListViewBase::scrollContentsBy(dx, dy, scrollElasticBand); - if (!draggedItems.isEmpty()) - viewport()->update(draggedItemsRect().translated(dx, dy)); -} - -void QIconModeViewBase::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight) -{ - if (column() >= topLeft.column() && column() <= bottomRight.column()) { - QStyleOptionViewItemV4 option = viewOptions(); - int bottom = qMin(items.count(), bottomRight.row() + 1); - for (int row = topLeft.row(); row < bottom; ++row) - items[row].resize(itemSize(option, modelIndex(row))); - } -} - -bool QIconModeViewBase::doBatchedItemLayout(const QListViewLayoutInfo &info, int max) -{ - if (info.last >= items.count()) { - //first we create the items - QStyleOptionViewItemV4 option = viewOptions(); - for (int row = items.count(); row <= info.last; ++row) { - QSize size = itemSize(option, modelIndex(row)); - QListViewItem item(QRect(0, 0, size.width(), size.height()), row); // default pos - items.append(item); - } - doDynamicLayout(info); - } - return (batchStartRow > max); // done -} - -QListViewItem QIconModeViewBase::indexToListViewItem(const QModelIndex &index) const -{ - if (index.isValid() && index.row() < items.count()) - return items.at(index.row()); - return QListViewItem(); -} - -void QIconModeViewBase::initBspTree(const QSize &contents) -{ - // remove all items from the tree - int leafCount = tree.leafCount(); - for (int l = 0; l < leafCount; ++l) - tree.leaf(l).clear(); - // we have to get the bounding rect of the items before we can initialize the tree - QBspTree::Node::Type type = QBspTree::Node::Both; // 2D - // simple heuristics to get better bsp - if (contents.height() / contents.width() >= 3) - type = QBspTree::Node::HorizontalPlane; - else if (contents.width() / contents.height() >= 3) - type = QBspTree::Node::VerticalPlane; - // build tree for the bounding rect (not just the contents rect) - tree.init(QRect(0, 0, contents.width(), contents.height()), type); -} - -QPoint QIconModeViewBase::initDynamicLayout(const QListViewLayoutInfo &info) -{ - int x, y; - if (info.first == 0) { - x = info.bounds.x() + info.spacing; - y = info.bounds.y() + info.spacing; - items.reserve(rowCount() - hiddenCount()); - } else { - int idx = info.first - 1; - while (idx > 0 && !items.at(idx).isValid()) - --idx; - const QListViewItem &item = items.at(idx); - x = item.x; - y = item.y; - if (info.flow == QListView::LeftToRight) - x += (info.grid.isValid() ? info.grid.width() : item.w) + info.spacing; - else - y += (info.grid.isValid() ? info.grid.height() : item.h) + info.spacing; - } - return QPoint(x, y); -} - -/*! - \internal -*/ -void QIconModeViewBase::doDynamicLayout(const QListViewLayoutInfo &info) -{ - const bool useItemSize = !info.grid.isValid(); - const QPoint topLeft = initDynamicLayout(info); - - int segStartPosition; - int segEndPosition; - int deltaFlowPosition; - int deltaSegPosition; - int deltaSegHint; - int flowPosition; - int segPosition; - - if (info.flow == QListView::LeftToRight) { - segStartPosition = info.bounds.left() + info.spacing; - segEndPosition = info.bounds.right(); - deltaFlowPosition = info.grid.width(); // dx - deltaSegPosition = (useItemSize ? batchSavedDeltaSeg : info.grid.height()); // dy - deltaSegHint = info.grid.height(); - flowPosition = topLeft.x(); - segPosition = topLeft.y(); - } else { // flow == QListView::TopToBottom - segStartPosition = info.bounds.top() + info.spacing; - segEndPosition = info.bounds.bottom(); - deltaFlowPosition = info.grid.height(); // dy - deltaSegPosition = (useItemSize ? batchSavedDeltaSeg : info.grid.width()); // dx - deltaSegHint = info.grid.width(); - flowPosition = topLeft.y(); - segPosition = topLeft.x(); - } - - if (moved.count() != items.count()) - moved.resize(items.count()); - - QRect rect(QPoint(), topLeft); - QListViewItem *item = 0; - for (int row = info.first; row <= info.last; ++row) { - item = &items[row]; - if (isHidden(row)) { - item->invalidate(); - } else { - // if we are not using a grid, we need to find the deltas - if (useItemSize) { - if (info.flow == QListView::LeftToRight) - deltaFlowPosition = item->w + info.spacing; - else - deltaFlowPosition = item->h + info.spacing; - } else { - item->w = qMin<int>(info.grid.width(), item->w); - item->h = qMin<int>(info.grid.height(), item->h); - } - - // create new segment - if (info.wrap - && flowPosition + deltaFlowPosition > segEndPosition - && flowPosition > segStartPosition) { - flowPosition = segStartPosition; - segPosition += deltaSegPosition; - if (useItemSize) - deltaSegPosition = 0; - } - // We must delay calculation of the seg adjustment, as this item - // may have caused a wrap to occur - if (useItemSize) { - if (info.flow == QListView::LeftToRight) - deltaSegHint = item->h + info.spacing; - else - deltaSegHint = item->w + info.spacing; - deltaSegPosition = qMax(deltaSegPosition, deltaSegHint); - } - - // set the position of the item - // ### idealy we should have some sort of alignment hint for the item - // ### (normally that would be a point between the icon and the text) - if (!moved.testBit(row)) { - if (info.flow == QListView::LeftToRight) { - if (useItemSize) { - item->x = flowPosition; - item->y = segPosition; - } else { // use grid - item->x = flowPosition + ((deltaFlowPosition - item->w) / 2); - item->y = segPosition; - } - } else { // TopToBottom - if (useItemSize) { - item->y = flowPosition; - item->x = segPosition; - } else { // use grid - item->y = flowPosition + ((deltaFlowPosition - item->h) / 2); - item->x = segPosition; - } - } - } - - // let the contents contain the new item - if (useItemSize) - rect |= item->rect(); - else if (info.flow == QListView::LeftToRight) - rect |= QRect(flowPosition, segPosition, deltaFlowPosition, deltaSegPosition); - else // flow == TopToBottom - rect |= QRect(segPosition, flowPosition, deltaSegPosition, deltaFlowPosition); - - // prepare for next item - flowPosition += deltaFlowPosition; // current position + item width + gap - } - } - batchSavedDeltaSeg = deltaSegPosition; - batchStartRow = info.last + 1; - bool done = (info.last >= rowCount() - 1); - // resize the content area - if (done || !info.bounds.contains(item->rect())) { - contentsSize = rect.size(); - if (info.flow == QListView::LeftToRight) - contentsSize.rheight() += info.spacing; - else - contentsSize.rwidth() += info.spacing; - } - if (rect.size().isEmpty()) - return; - // resize tree - int insertFrom = info.first; - if (done || info.first == 0) { - initBspTree(rect.size()); - insertFrom = 0; - } - // insert items in tree - for (int row = insertFrom; row <= info.last; ++row) - tree.insertLeaf(items.at(row).rect(), row); - // if the new items are visble, update the viewport - QRect changedRect(topLeft, rect.bottomRight()); - if (clipRect().intersects(changedRect)) - viewport()->update(); -} - -QVector<QModelIndex> QIconModeViewBase::intersectingSet(const QRect &area) const -{ - QIconModeViewBase *that = const_cast<QIconModeViewBase*>(this); - QBspTree::Data data(static_cast<void*>(that)); - QVector<QModelIndex> res; - that->interSectingVector = &res; - that->tree.climbTree(area, &QIconModeViewBase::addLeaf, data); - that->interSectingVector = 0; - return res; -} - -QRect QIconModeViewBase::itemsRect(const QVector<QModelIndex> &indexes) const -{ - QVector<QModelIndex>::const_iterator it = indexes.begin(); - QListViewItem item = indexToListViewItem(*it); - QRect rect(item.x, item.y, item.w, item.h); - for (; it != indexes.end(); ++it) { - item = indexToListViewItem(*it); - rect |= viewItemRect(item); - } - return rect; -} - -int QIconModeViewBase::itemIndex(const QListViewItem &item) const -{ - if (!item.isValid()) - return -1; - int i = item.indexHint; - if (i < items.count()) { - if (items.at(i) == item) - return i; - } else { - i = items.count() - 1; - } - - int j = i; - int c = items.count(); - bool a = true; - bool b = true; - - while (a || b) { - if (a) { - if (items.at(i) == item) { - items.at(i).indexHint = i; - return i; - } - a = ++i < c; - } - if (b) { - if (items.at(j) == item) { - items.at(j).indexHint = j; - return j; - } - b = --j > -1; - } - } - return -1; -} - -void QIconModeViewBase::addLeaf(QVector<int> &leaf, const QRect &area, - uint visited, QBspTree::Data data) -{ - QListViewItem *vi; - QIconModeViewBase *_this = static_cast<QIconModeViewBase *>(data.ptr); - for (int i = 0; i < leaf.count(); ++i) { - int idx = leaf.at(i); - if (idx < 0 || idx >= _this->items.count()) - continue; - vi = &_this->items[idx]; - Q_ASSERT(vi); - if (vi->isValid() && vi->rect().intersects(area) && vi->visited != visited) { - QModelIndex index = _this->dd->listViewItemToIndex(*vi); - Q_ASSERT(index.isValid()); - _this->interSectingVector->append(index); - vi->visited = visited; - } - } -} - -void QIconModeViewBase::moveItem(int index, const QPoint &dest) -{ - // does not impact on the bintree itself or the contents rect - QListViewItem *item = &items[index]; - QRect rect = item->rect(); - - // move the item without removing it from the tree - tree.removeLeaf(rect, index); - item->move(dest); - tree.insertLeaf(QRect(dest, rect.size()), index); - - // resize the contents area - contentsSize = (QRect(QPoint(0, 0), contentsSize)|QRect(dest, rect.size())).size(); - - // mark the item as moved - if (moved.count() != items.count()) - moved.resize(items.count()); - moved.setBit(index, true); -} - -QPoint QIconModeViewBase::snapToGrid(const QPoint &pos) const -{ - int x = pos.x() - (pos.x() % gridSize().width()); - int y = pos.y() - (pos.y() % gridSize().height()); - return QPoint(x, y); -} - -QPoint QIconModeViewBase::draggedItemsDelta() const -{ - if (movement() == QListView::Snap) { - QPoint snapdelta = QPoint((offset().x() % gridSize().width()), - (offset().y() % gridSize().height())); - return snapToGrid(draggedItemsPos + snapdelta) - snapToGrid(pressedPosition()) - snapdelta; - } - return draggedItemsPos - pressedPosition(); -} - -QRect QIconModeViewBase::draggedItemsRect() const -{ - QRect rect = itemsRect(draggedItems); - rect.translate(draggedItemsDelta()); - return rect; -} - -void QListViewPrivate::scrollElasticBandBy(int dx, int dy) -{ - if (dx > 0) // right - elasticBand.moveRight(elasticBand.right() + dx); - else if (dx < 0) // left - elasticBand.moveLeft(elasticBand.left() - dx); - if (dy > 0) // down - elasticBand.moveBottom(elasticBand.bottom() + dy); - else if (dy < 0) // up - elasticBand.moveTop(elasticBand.top() - dy); -} - -void QIconModeViewBase::clear() -{ - tree.destroy(); - items.clear(); - moved.clear(); - batchStartRow = 0; - batchSavedDeltaSeg = 0; -} - -void QIconModeViewBase::updateContentsSize() -{ - QRect bounding; - for (int i = 0; i < items.count(); ++i) - bounding |= items.at(i).rect(); - contentsSize = bounding.size(); -} - -/*! - \reimp -*/ -void QListView::currentChanged(const QModelIndex ¤t, const QModelIndex &previous) -{ -#ifndef QT_NO_ACCESSIBILITY - if (QAccessible::isActive()) { - if (current.isValid()) { - int entry = visualIndex(current) + 1; - QAccessible::updateAccessibility(viewport(), entry, QAccessible::Focus); - } - } -#endif - QAbstractItemView::currentChanged(current, previous); -} - -/*! - \reimp -*/ -void QListView::selectionChanged(const QItemSelection &selected, - const QItemSelection &deselected) -{ -#ifndef QT_NO_ACCESSIBILITY - if (QAccessible::isActive()) { - // ### does not work properly for selection ranges. - QModelIndex sel = selected.indexes().value(0); - if (sel.isValid()) { - int entry = visualIndex(sel) + 1; - QAccessible::updateAccessibility(viewport(), entry, QAccessible::Selection); - } - QModelIndex desel = deselected.indexes().value(0); - if (desel.isValid()) { - int entry = visualIndex(desel) + 1; - QAccessible::updateAccessibility(viewport(), entry, QAccessible::SelectionRemove); - } - } -#endif - QAbstractItemView::selectionChanged(selected, deselected); -} - -int QListView::visualIndex(const QModelIndex &index) const -{ - Q_D(const QListView); - d->executePostedLayout(); - QListViewItem itm = d->indexToListViewItem(index); - return d->commonListView->itemIndex(itm); -} - -QT_END_NAMESPACE - -#endif // QT_NO_LISTVIEW |