--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/itemviews/qlistview.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,2993 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 between 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) {
+ for (int i = d->hiddenRows.count() - 1; i >= 0; --i) {
+ int hiddenRow = d->hiddenRows.at(i).row();
+ if (hiddenRow >= start && hiddenRow <= end) {
+ d->hiddenRows.remove(i);
+ }
+ }
+ }
+ 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)
+{
+ if (!d_func()->commonListView->filterDragMoveEvent(e))
+ 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
+
+ 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(viewport()->size().width(), option.rect.width()));
+ else
+ option.rect.setHeight(qMin(viewport()->size().height(), 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;
+ }
+
+ if (const QWidget *widget = d->editorForIndex(*it).editor) {
+ QRegion itemGeometry(option.rect);
+ QRegion widgetGeometry(widget->geometry());
+ painter.save();
+ painter.setClipRegion(itemGeometry.subtracted(widgetGeometry));
+ d->delegateForIndex(*it)->paint(&painter, option, *it);
+ painter.restore();
+ } else {
+ 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:
+ rect.moveTop(rect.top() - d->viewport->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:
+ rect.moveTop(rect.top() + d->viewport->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
+*/
+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;
+ 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)
+ selectionRegion += QRegion(visualRect(d->model->index(r, c, parent)));
+ } 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());
+ selectionRegion += QRegion(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()) {
+ d->layoutChildren(); // we need the viewport size to be updated
+ if (d->flow == TopToBottom) {
+ if (horizontalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) {
+ d->setContentsSize(viewport()->width(), contentsSize().height());
+ horizontalScrollBar()->setRange(0, 0); // we see all the contents anyway
+ }
+ } else { // LeftToRight
+ if (verticalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) {
+ d->setContentsSize(contentsSize().width(), viewport()->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;
+}
+
+/*
+ * Common ListView Implementation
+*/
+
+void QCommonListViewBase::appendHiddenRow(int row)
+{
+ dd->hiddenRows.append(dd->model->index(row, 0, qq->rootIndex()));
+}
+
+void QCommonListViewBase::removeHiddenRow(int row)
+{
+ dd->hiddenRows.remove(dd->hiddenRows.indexOf(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);
+}
+#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);
+ }
+ } 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);
+ int previousCoordinate = segmentPositions.at(previousValue);
+ 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);
+ int previousCoordinate = segmentPositions.at(previousValue);
+ dy = previousCoordinate - currentCoordinate;
+ }
+ } else {
+ if (flowPositions.isEmpty())
+ return;
+ const int max = flowPositions.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;
+
+ // 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;
+ 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;
+}
+
+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;
+ 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 {
+ const QListViewItem item = items.at(info.first - 1);
+ 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 = QSize(rect.width(), rect.height());
+ // 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