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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qtreeview.h"
+
+#ifndef QT_NO_TREEVIEW
+#include <qheaderview.h>
+#include <qitemdelegate.h>
+#include <qapplication.h>
+#include <qscrollbar.h>
+#include <qpainter.h>
+#include <qstack.h>
+#include <qstyle.h>
+#include <qstyleoption.h>
+#include <qevent.h>
+#include <qpen.h>
+#include <qdebug.h>
+#ifndef QT_NO_ACCESSIBILITY
+#include <qaccessible.h>
+#endif
+
+#include <private/qtreeview_p.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+ \class QTreeView
+ \brief The QTreeView class provides a default model/view implementation of a tree view.
+
+ \ingroup model-view
+ \ingroup advanced
+ \mainclass
+
+ A QTreeView implements a tree representation of items from a
+ model. This class is used to provide standard hierarchical lists that
+ were previously provided by the \c QListView class, but using the more
+ flexible approach provided by Qt's model/view architecture.
+
+ The QTreeView class is one of the \l{Model/View Classes} and is part of
+ Qt's \l{Model/View Programming}{model/view framework}.
+
+ QTreeView implements the interfaces defined by the
+ QAbstractItemView class to allow it to display data provided by
+ models derived from the QAbstractItemModel class.
+
+ It is simple to construct a tree view displaying data from a
+ model. In the following example, the contents of a directory are
+ supplied by a QDirModel and displayed as a tree:
+
+ \snippet doc/src/snippets/shareddirmodel/main.cpp 3
+ \snippet doc/src/snippets/shareddirmodel/main.cpp 6
+
+ The model/view architecture ensures that the contents of the tree view
+ are updated as the model changes.
+
+ Items that have children can be in an expanded (children are
+ visible) or collapsed (children are hidden) state. When this state
+ changes a collapsed() or expanded() signal is emitted with the
+ model index of the relevant item.
+
+ The amount of indentation used to indicate levels of hierarchy is
+ controlled by the \l indentation property.
+
+ Headers in tree views are constructed using the QHeaderView class and can
+ be hidden using \c{header()->hide()}. Note that each header is configured
+ with its \l{QHeaderView::}{stretchLastSection} property set to true,
+ ensuring that the view does not waste any of the space assigned to it for
+ its header. If this value is set to true, this property will override the
+ resize mode set on the last section in the header.
+
+
+ \section1 Key Bindings
+
+ QTreeView supports a set of key bindings that enable the user to
+ navigate in the view and interact with the contents of items:
+
+ \table
+ \header \o Key \o Action
+ \row \o Up \o Moves the cursor to the item in the same column on
+ the previous row. If the parent of the current item has no more rows to
+ navigate to, the cursor moves to the relevant item in the last row
+ of the sibling that precedes the parent.
+ \row \o Down \o Moves the cursor to the item in the same column on
+ the next row. If the parent of the current item has no more rows to
+ navigate to, the cursor moves to the relevant item in the first row
+ of the sibling that follows the parent.
+ \row \o Left \o Hides the children of the current item (if present)
+ by collapsing a branch.
+ \row \o Minus \o Same as LeftArrow.
+ \row \o Right \o Reveals the children of the current item (if present)
+ by expanding a branch.
+ \row \o Plus \o Same as RightArrow.
+ \row \o Asterisk \o Expands all children of the current item (if present).
+ \row \o PageUp \o Moves the cursor up one page.
+ \row \o PageDown \o Moves the cursor down one page.
+ \row \o Home \o Moves the cursor to an item in the same column of the first
+ row of the first top-level item in the model.
+ \row \o End \o Moves the cursor to an item in the same column of the last
+ row of the last top-level item in the model.
+ \row \o F2 \o In editable models, this opens the current item for editing.
+ The Escape key can be used to cancel the editing process and revert
+ any changes to the data displayed.
+ \endtable
+
+ \omit
+ Describe the expanding/collapsing concept if not covered elsewhere.
+ \endomit
+
+ \table 100%
+ \row \o \inlineimage windowsxp-treeview.png Screenshot of a Windows XP style tree view
+ \o \inlineimage macintosh-treeview.png Screenshot of a Macintosh style tree view
+ \o \inlineimage plastique-treeview.png Screenshot of a Plastique style tree view
+ \row \o A \l{Windows XP Style Widget Gallery}{Windows XP style} tree view.
+ \o A \l{Macintosh Style Widget Gallery}{Macintosh style} tree view.
+ \o A \l{Plastique Style Widget Gallery}{Plastique style} tree 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 heights
+ is to set the \l uniformRowHeights property to true.
+
+ \sa QListView, QTreeWidget, {View Classes}, QAbstractItemModel, QAbstractItemView,
+ {Dir View Example}
+*/
+
+
+/*!
+ \fn void QTreeView::expanded(const QModelIndex &index)
+
+ This signal is emitted when the item specified by \a index is expanded.
+*/
+
+
+/*!
+ \fn void QTreeView::collapsed(const QModelIndex &index)
+
+ This signal is emitted when the item specified by \a index is collapsed.
+*/
+
+/*!
+ Constructs a table view with a \a parent to represent a model's
+ data. Use setModel() to set the model.
+
+ \sa QAbstractItemModel
+*/
+QTreeView::QTreeView(QWidget *parent)
+ : QAbstractItemView(*new QTreeViewPrivate, parent)
+{
+ Q_D(QTreeView);
+ d->initialize();
+}
+
+/*!
+ \internal
+*/
+QTreeView::QTreeView(QTreeViewPrivate &dd, QWidget *parent)
+ : QAbstractItemView(dd, parent)
+{
+ Q_D(QTreeView);
+ d->initialize();
+}
+
+/*!
+ Destroys the tree view.
+*/
+QTreeView::~QTreeView()
+{
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::setModel(QAbstractItemModel *model)
+{
+ Q_D(QTreeView);
+ if (model == d->model)
+ return;
+ if (d->selectionModel) { // support row editing
+ disconnect(d->selectionModel, SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
+ d->model, SLOT(submit()));
+ disconnect(d->model, SIGNAL(rowsRemoved(QModelIndex,int,int)),
+ this, SLOT(rowsRemoved(QModelIndex,int,int)));
+ disconnect(d->model, SIGNAL(modelAboutToBeReset()), this, SLOT(_q_modelAboutToBeReset()));
+ }
+ d->viewItems.clear();
+ d->expandedIndexes.clear();
+ d->hiddenIndexes.clear();
+ d->header->setModel(model);
+ QAbstractItemView::setModel(model);
+
+ // QAbstractItemView connects to a private slot
+ disconnect(d->model, SIGNAL(rowsRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_rowsRemoved(QModelIndex,int,int)));
+ // do header layout after the tree
+ disconnect(d->model, SIGNAL(layoutChanged()),
+ d->header, SLOT(_q_layoutChanged()));
+ // QTreeView has a public slot for this
+ connect(d->model, SIGNAL(rowsRemoved(QModelIndex,int,int)),
+ this, SLOT(rowsRemoved(QModelIndex,int,int)));
+
+ connect(d->model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_columnsAboutToBeRemoved(QModelIndex,int,int)));
+ connect(d->model, SIGNAL(columnsRemoved(QModelIndex,int,int)),
+ this, SLOT(_q_columnsRemoved(QModelIndex,int,int)));
+
+ connect(d->model, SIGNAL(modelAboutToBeReset()), SLOT(_q_modelAboutToBeReset()));
+
+ if (d->sortingEnabled)
+ sortByColumn(header()->sortIndicatorSection(), header()->sortIndicatorOrder());
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::setRootIndex(const QModelIndex &index)
+{
+ Q_D(QTreeView);
+ d->header->setRootIndex(index);
+ QAbstractItemView::setRootIndex(index);
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::setSelectionModel(QItemSelectionModel *selectionModel)
+{
+ Q_D(QTreeView);
+ Q_ASSERT(selectionModel);
+ if (d->selectionModel) {
+ if (d->allColumnsShowFocus) {
+ QObject::disconnect(d->selectionModel, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
+ this, SLOT(_q_currentChanged(QModelIndex,QModelIndex)));
+ }
+ // support row editing
+ disconnect(d->selectionModel, SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
+ d->model, SLOT(submit()));
+ }
+
+ d->header->setSelectionModel(selectionModel);
+ QAbstractItemView::setSelectionModel(selectionModel);
+
+ if (d->selectionModel) {
+ if (d->allColumnsShowFocus) {
+ QObject::connect(d->selectionModel, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
+ this, SLOT(_q_currentChanged(QModelIndex,QModelIndex)));
+ }
+ // support row editing
+ connect(d->selectionModel, SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
+ d->model, SLOT(submit()));
+ }
+}
+
+/*!
+ Returns the header for the tree view.
+
+ \sa QAbstractItemModel::headerData()
+*/
+QHeaderView *QTreeView::header() const
+{
+ Q_D(const QTreeView);
+ return d->header;
+}
+
+/*!
+ Sets the header for the tree view, to the given \a header.
+
+ The view takes ownership over the given \a header and deletes it
+ when a new header is set.
+
+ \sa QAbstractItemModel::headerData()
+*/
+void QTreeView::setHeader(QHeaderView *header)
+{
+ Q_D(QTreeView);
+ if (header == d->header || !header)
+ return;
+ if (d->header && d->header->parent() == this)
+ delete d->header;
+ d->header = header;
+ d->header->setParent(this);
+
+ if (!d->header->model()) {
+ d->header->setModel(d->model);
+ if (d->selectionModel)
+ d->header->setSelectionModel(d->selectionModel);
+ }
+
+ connect(d->header, SIGNAL(sectionResized(int,int,int)),
+ this, SLOT(columnResized(int,int,int)));
+ connect(d->header, SIGNAL(sectionMoved(int,int,int)),
+ this, SLOT(columnMoved()));
+ connect(d->header, SIGNAL(sectionCountChanged(int,int)),
+ this, SLOT(columnCountChanged(int,int)));
+ connect(d->header, SIGNAL(sectionHandleDoubleClicked(int)),
+ this, SLOT(resizeColumnToContents(int)));
+ connect(d->header, SIGNAL(geometriesChanged()),
+ this, SLOT(updateGeometries()));
+
+ setSortingEnabled(d->sortingEnabled);
+}
+
+/*!
+ \property QTreeView::autoExpandDelay
+ \brief The delay time before items in a tree are opened during a drag and drop operation.
+ \since 4.3
+
+ This property holds the amount of time in milliseconds that the user must wait over
+ a node before that node will automatically open or close. If the time is
+ set to less then 0 then it will not be activated.
+
+ By default, this property has a value of -1, meaning that auto-expansion is disabled.
+*/
+int QTreeView::autoExpandDelay() const
+{
+ Q_D(const QTreeView);
+ return d->autoExpandDelay;
+}
+
+void QTreeView::setAutoExpandDelay(int delay)
+{
+ Q_D(QTreeView);
+ d->autoExpandDelay = delay;
+}
+
+/*!
+ \property QTreeView::indentation
+ \brief indentation of the items in the tree view.
+
+ This property holds the indentation measured in pixels of the items for each
+ level in the tree view. For top-level items, the indentation specifies the
+ horizontal distance from the viewport edge to the items in the first column;
+ for child items, it specifies their indentation from their parent items.
+
+ By default, this property has a value of 20.
+*/
+int QTreeView::indentation() const
+{
+ Q_D(const QTreeView);
+ return d->indent;
+}
+
+void QTreeView::setIndentation(int i)
+{
+ Q_D(QTreeView);
+ if (i != d->indent) {
+ d->indent = i;
+ d->viewport->update();
+ }
+}
+
+/*!
+ \property QTreeView::rootIsDecorated
+ \brief whether to show controls for expanding and collapsing top-level items
+
+ Items with children are typically shown with controls to expand and collapse
+ them, allowing their children to be shown or hidden. If this property is
+ false, these controls are not shown for top-level items. This can be used to
+ make a single level tree structure appear like a simple list of items.
+
+ By default, this property is true.
+*/
+bool QTreeView::rootIsDecorated() const
+{
+ Q_D(const QTreeView);
+ return d->rootDecoration;
+}
+
+void QTreeView::setRootIsDecorated(bool show)
+{
+ Q_D(QTreeView);
+ if (show != d->rootDecoration) {
+ d->rootDecoration = show;
+ d->viewport->update();
+ }
+}
+
+/*!
+ \property QTreeView::uniformRowHeights
+ \brief whether all items in the treeview have the same height
+
+ This property should only be set to true if it is guaranteed that all items
+ in the view has the same height. This enables the view to do some
+ optimizations.
+
+ The height is obtained from the first item in the view. It is updated
+ when the data changes on that item.
+
+ By default, this property is false.
+*/
+bool QTreeView::uniformRowHeights() const
+{
+ Q_D(const QTreeView);
+ return d->uniformRowHeights;
+}
+
+void QTreeView::setUniformRowHeights(bool uniform)
+{
+ Q_D(QTreeView);
+ d->uniformRowHeights = uniform;
+}
+
+/*!
+ \property QTreeView::itemsExpandable
+ \brief whether the items are expandable by the user.
+
+ This property holds whether the user can expand and collapse items
+ interactively.
+
+ By default, this property is true.
+
+*/
+bool QTreeView::itemsExpandable() const
+{
+ Q_D(const QTreeView);
+ return d->itemsExpandable;
+}
+
+void QTreeView::setItemsExpandable(bool enable)
+{
+ Q_D(QTreeView);
+ d->itemsExpandable = enable;
+}
+
+/*!
+ \property QTreeView::expandsOnDoubleClick
+ \since 4.4
+ \brief whether the items can be expanded by double-clicking.
+
+ This property holds whether the user can expand and collapse items
+ by double-clicking. The default value is true.
+
+ \sa itemsExpandable
+*/
+bool QTreeView::expandsOnDoubleClick() const
+{
+ Q_D(const QTreeView);
+ return d->expandsOnDoubleClick;
+}
+
+void QTreeView::setExpandsOnDoubleClick(bool enable)
+{
+ Q_D(QTreeView);
+ d->expandsOnDoubleClick = enable;
+}
+
+/*!
+ Returns the horizontal position of the \a column in the viewport.
+*/
+int QTreeView::columnViewportPosition(int column) const
+{
+ Q_D(const QTreeView);
+ return d->header->sectionViewportPosition(column);
+}
+
+/*!
+ Returns the width of the \a column.
+
+ \sa resizeColumnToContents(), setColumnWidth()
+*/
+int QTreeView::columnWidth(int column) const
+{
+ Q_D(const QTreeView);
+ return d->header->sectionSize(column);
+}
+
+/*!
+ \since 4.2
+
+ Sets the width of the given \a column to the \a width specified.
+
+ \sa columnWidth(), resizeColumnToContents()
+*/
+void QTreeView::setColumnWidth(int column, int width)
+{
+ Q_D(QTreeView);
+ d->header->resizeSection(column, width);
+}
+
+/*!
+ Returns the column in the tree view whose header covers the \a x
+ coordinate given.
+*/
+int QTreeView::columnAt(int x) const
+{
+ Q_D(const QTreeView);
+ return d->header->logicalIndexAt(x);
+}
+
+/*!
+ Returns true if the \a column is hidden; otherwise returns false.
+
+ \sa hideColumn(), isRowHidden()
+*/
+bool QTreeView::isColumnHidden(int column) const
+{
+ Q_D(const QTreeView);
+ return d->header->isSectionHidden(column);
+}
+
+/*!
+ If \a hide is true the \a column is hidden, otherwise the \a column is shown.
+
+ \sa hideColumn(), setRowHidden()
+*/
+void QTreeView::setColumnHidden(int column, bool hide)
+{
+ Q_D(QTreeView);
+ if (column < 0 || column >= d->header->count())
+ return;
+ d->header->setSectionHidden(column, hide);
+}
+
+/*!
+ \property QTreeView::headerHidden
+ \brief whether the header is shown or not.
+ \since 4.4
+
+ If this property is true, the header is not shown otherwise it is.
+ The default value is false.
+
+ \sa header()
+*/
+bool QTreeView::isHeaderHidden() const
+{
+ Q_D(const QTreeView);
+ return d->header->isHidden();
+}
+
+void QTreeView::setHeaderHidden(bool hide)
+{
+ Q_D(QTreeView);
+ d->header->setHidden(hide);
+}
+
+/*!
+ Returns true if the item in the given \a row of the \a parent is hidden;
+ otherwise returns false.
+
+ \sa setRowHidden(), isColumnHidden()
+*/
+bool QTreeView::isRowHidden(int row, const QModelIndex &parent) const
+{
+ Q_D(const QTreeView);
+ if (!d->model)
+ return false;
+ return d->isRowHidden(d->model->index(row, 0, parent));
+}
+
+/*!
+ If \a hide is true the \a row with the given \a parent is hidden, otherwise the \a row is shown.
+
+ \sa isRowHidden(), setColumnHidden()
+*/
+void QTreeView::setRowHidden(int row, const QModelIndex &parent, bool hide)
+{
+ Q_D(QTreeView);
+ if (!d->model)
+ return;
+ QModelIndex index = d->model->index(row, 0, parent);
+ if (!index.isValid())
+ return;
+
+ if (hide) {
+ d->hiddenIndexes.insert(index);
+ } else if(d->isPersistent(index)) { //if the index is not persistent, it cannot be in the set
+ d->hiddenIndexes.remove(index);
+ }
+
+ d->doDelayedItemsLayout();
+}
+
+/*!
+ \since 4.3
+
+ Returns true if the item in first column in the given \a row
+ of the \a parent is spanning all the columns; otherwise returns false.
+
+ \sa setFirstColumnSpanned()
+*/
+bool QTreeView::isFirstColumnSpanned(int row, const QModelIndex &parent) const
+{
+ Q_D(const QTreeView);
+ if (d->spanningIndexes.isEmpty() || !d->model)
+ return false;
+ QModelIndex index = d->model->index(row, 0, parent);
+ for (int i = 0; i < d->spanningIndexes.count(); ++i)
+ if (d->spanningIndexes.at(i) == index)
+ return true;
+ return false;
+}
+
+/*!
+ \since 4.3
+
+ If \a span is true the item in the first column in the \a row
+ with the given \a parent is set to span all columns, otherwise all items
+ on the \a row are shown.
+
+ \sa isFirstColumnSpanned()
+*/
+void QTreeView::setFirstColumnSpanned(int row, const QModelIndex &parent, bool span)
+{
+ Q_D(QTreeView);
+ if (!d->model)
+ return;
+ QModelIndex index = d->model->index(row, 0, parent);
+ if (!index.isValid())
+ return;
+
+ if (span) {
+ QPersistentModelIndex persistent(index);
+ if (!d->spanningIndexes.contains(persistent))
+ d->spanningIndexes.append(persistent);
+ } else {
+ QPersistentModelIndex persistent(index);
+ int i = d->spanningIndexes.indexOf(persistent);
+ if (i >= 0)
+ d->spanningIndexes.remove(i);
+ }
+
+ d->executePostedLayout();
+ int i = d->viewIndex(index);
+ if (i >= 0)
+ d->viewItems[i].spanning = span;
+
+ d->viewport->update();
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
+{
+ Q_D(QTreeView);
+
+ // if we are going to do a complete relayout anyway, there is no need to update
+ if (d->delayedPendingLayout)
+ return;
+
+ // refresh the height cache here; we don't really lose anything by getting the size hint,
+ // since QAbstractItemView::dataChanged() will get the visualRect for the items anyway
+
+ QModelIndex top = topLeft.sibling(topLeft.row(), 0);
+ int topViewIndex = d->viewIndex(top);
+ if (topViewIndex == 0)
+ d->defaultItemHeight = indexRowSizeHint(top);
+ bool sizeChanged = false;
+ if (topViewIndex != -1) {
+ if (topLeft == bottomRight) {
+ int oldHeight = d->itemHeight(topViewIndex);
+ d->invalidateHeightCache(topViewIndex);
+ sizeChanged = (oldHeight != d->itemHeight(topViewIndex));
+ } else {
+ QModelIndex bottom = bottomRight.sibling(bottomRight.row(), 0);
+ int bottomViewIndex = d->viewIndex(bottom);
+ for (int i = topViewIndex; i <= bottomViewIndex; ++i) {
+ int oldHeight = d->itemHeight(i);
+ d->invalidateHeightCache(i);
+ sizeChanged |= (oldHeight != d->itemHeight(i));
+ }
+ }
+ }
+
+ if (sizeChanged) {
+ d->updateScrollBars();
+ d->viewport->update();
+ }
+ QAbstractItemView::dataChanged(topLeft, bottomRight);
+}
+
+/*!
+ Hides the \a column given.
+
+ \note This function should only be called after the model has been
+ initialized, as the view needs to know the number of columns in order to
+ hide \a column.
+
+ \sa showColumn(), setColumnHidden()
+*/
+void QTreeView::hideColumn(int column)
+{
+ Q_D(QTreeView);
+ d->header->hideSection(column);
+}
+
+/*!
+ Shows the given \a column in the tree view.
+
+ \sa hideColumn(), setColumnHidden()
+*/
+void QTreeView::showColumn(int column)
+{
+ Q_D(QTreeView);
+ d->header->showSection(column);
+}
+
+/*!
+ \fn void QTreeView::expand(const QModelIndex &index)
+
+ Expands the model item specified by the \a index.
+
+ \sa expanded()
+*/
+void QTreeView::expand(const QModelIndex &index)
+{
+ Q_D(QTreeView);
+ if (!d->isIndexValid(index))
+ return;
+ if (d->delayedPendingLayout) {
+ //A complete relayout is going to be performed, just store the expanded index, no need to layout.
+ if (d->storeExpanded(index))
+ emit expanded(index);
+ return;
+ }
+
+ int i = d->viewIndex(index);
+ if (i != -1) { // is visible
+ d->expand(i, true);
+ if (!d->isAnimating()) {
+ updateGeometries();
+ d->viewport->update();
+ }
+ } else if (d->storeExpanded(index)) {
+ emit expanded(index);
+ }
+}
+
+/*!
+ \fn void QTreeView::collapse(const QModelIndex &index)
+
+ Collapses the model item specified by the \a index.
+
+ \sa collapsed()
+*/
+void QTreeView::collapse(const QModelIndex &index)
+{
+ Q_D(QTreeView);
+ if (!d->isIndexValid(index))
+ return;
+ //if the current item is now invisible, the autoscroll will expand the tree to see it, so disable the autoscroll
+ d->delayedAutoScroll.stop();
+
+ if (d->delayedPendingLayout) {
+ //A complete relayout is going to be performed, just un-store the expanded index, no need to layout.
+ if (d->isPersistent(index) && d->expandedIndexes.remove(index))
+ emit collapsed(index);
+ return;
+ }
+ int i = d->viewIndex(index);
+ if (i != -1) { // is visible
+ d->collapse(i, true);
+ if (!d->isAnimating()) {
+ updateGeometries();
+ viewport()->update();
+ }
+ } else {
+ if (d->isPersistent(index) && d->expandedIndexes.remove(index))
+ emit collapsed(index);
+ }
+}
+
+/*!
+ \fn bool QTreeView::isExpanded(const QModelIndex &index) const
+
+ Returns true if the model item \a index is expanded; otherwise returns
+ false.
+
+ \sa expand(), expanded(), setExpanded()
+*/
+bool QTreeView::isExpanded(const QModelIndex &index) const
+{
+ Q_D(const QTreeView);
+ return d->isIndexExpanded(index);
+}
+
+/*!
+ Sets the item referred to by \a index to either collapse or expanded,
+ depending on the value of \a expanded.
+
+ \sa expanded(), expand(), isExpanded()
+*/
+void QTreeView::setExpanded(const QModelIndex &index, bool expanded)
+{
+ if (expanded)
+ this->expand(index);
+ else
+ this->collapse(index);
+}
+
+/*!
+ \since 4.2
+ \property QTreeView::sortingEnabled
+ \brief whether sorting is enabled
+
+ If this property is true, sorting is enabled for the tree; if the property
+ is false, sorting is not enabled. The default value is false.
+
+ \note In order to avoid performance issues, it is recommended that
+ sorting is enabled \e after inserting the items into the tree.
+ Alternatively, you could also insert the items into a list before inserting
+ the items into the tree.
+
+ \sa sortByColumn()
+*/
+
+void QTreeView::setSortingEnabled(bool enable)
+{
+ Q_D(QTreeView);
+ d->sortingEnabled = enable;
+ header()->setSortIndicatorShown(enable);
+ header()->setClickable(enable);
+ if (enable) {
+ connect(header(), SIGNAL(sortIndicatorChanged(int,Qt::SortOrder)),
+ this, SLOT(_q_sortIndicatorChanged(int, Qt::SortOrder)));
+ sortByColumn(header()->sortIndicatorSection(), header()->sortIndicatorOrder());
+ } else {
+ disconnect(header(), SIGNAL(sortIndicatorChanged(int,Qt::SortOrder)),
+ this, SLOT(_q_sortIndicatorChanged(int, Qt::SortOrder)));
+ }
+}
+
+bool QTreeView::isSortingEnabled() const
+{
+ Q_D(const QTreeView);
+ return d->sortingEnabled;
+}
+
+/*!
+ \since 4.2
+ \property QTreeView::animated
+ \brief whether animations are enabled
+
+ If this property is true the treeview will animate expandsion
+ and collasping of branches. If this property is false, the treeview
+ will expand or collapse branches immediately without showing
+ the animation.
+
+ By default, this property is false.
+*/
+
+void QTreeView::setAnimated(bool animate)
+{
+ Q_D(QTreeView);
+ d->animationsEnabled = animate;
+}
+
+bool QTreeView::isAnimated() const
+{
+ Q_D(const QTreeView);
+ return d->animationsEnabled;
+}
+
+/*!
+ \since 4.2
+ \property QTreeView::allColumnsShowFocus
+ \brief whether items should show keyboard focus using all columns
+
+ If this property is true all columns will show focus, otherwise only
+ one column will show focus.
+
+ The default is false.
+*/
+
+void QTreeView::setAllColumnsShowFocus(bool enable)
+{
+ Q_D(QTreeView);
+ if (d->allColumnsShowFocus == enable)
+ return;
+ if (d->selectionModel) {
+ if (enable) {
+ QObject::connect(d->selectionModel, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
+ this, SLOT(_q_currentChanged(QModelIndex,QModelIndex)));
+ } else {
+ QObject::disconnect(d->selectionModel, SIGNAL(currentChanged(QModelIndex,QModelIndex)),
+ this, SLOT(_q_currentChanged(QModelIndex,QModelIndex)));
+ }
+ }
+ d->allColumnsShowFocus = enable;
+ d->viewport->update();
+}
+
+bool QTreeView::allColumnsShowFocus() const
+{
+ Q_D(const QTreeView);
+ return d->allColumnsShowFocus;
+}
+
+/*!
+ \property QTreeView::wordWrap
+ \brief the item text word-wrapping policy
+ \since 4.3
+
+ 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.
+
+ Note that even if wrapping is enabled, the cell will not be
+ expanded to fit all text. Ellipsis will be inserted according to
+ the current \l{QAbstractItemView::}{textElideMode}.
+*/
+void QTreeView::setWordWrap(bool on)
+{
+ Q_D(QTreeView);
+ if (d->wrapItemText == on)
+ return;
+ d->wrapItemText = on;
+ d->doDelayedItemsLayout();
+}
+
+bool QTreeView::wordWrap() const
+{
+ Q_D(const QTreeView);
+ return d->wrapItemText;
+}
+
+
+/*!
+ \reimp
+ */
+void QTreeView::keyboardSearch(const QString &search)
+{
+ Q_D(QTreeView);
+ if (!d->model->rowCount(d->root) || !d->model->columnCount(d->root))
+ return;
+
+ QModelIndex start;
+ if (currentIndex().isValid())
+ start = currentIndex();
+ else
+ start = d->model->index(0, 0, d->root);
+
+ QTime now(QTime::currentTime());
+ bool skipRow = false;
+ if (search.isEmpty()
+ || (d->keyboardInputTime.msecsTo(now) > QApplication::keyboardInputInterval())) {
+ d->keyboardInput = search;
+ skipRow = true;
+ } else {
+ d->keyboardInput += search;
+ }
+ d->keyboardInputTime = now;
+
+ // special case for searches with same key like 'aaaaa'
+ bool sameKey = false;
+ if (d->keyboardInput.length() > 1) {
+ int c = d->keyboardInput.count(d->keyboardInput.at(d->keyboardInput.length() - 1));
+ sameKey = (c == d->keyboardInput.length());
+ if (sameKey)
+ skipRow = true;
+ }
+
+ // skip if we are searching for the same key or a new search started
+ if (skipRow) {
+ if (indexBelow(start).isValid())
+ start = indexBelow(start);
+ else
+ start = d->model->index(0, start.column(), d->root);
+ }
+
+ d->executePostedLayout();
+ int startIndex = d->viewIndex(start);
+ if (startIndex <= -1)
+ return;
+
+ int previousLevel = -1;
+ int bestAbove = -1;
+ int bestBelow = -1;
+ QString searchString = sameKey ? QString(d->keyboardInput.at(0)) : d->keyboardInput;
+ for (int i = 0; i < d->viewItems.count(); ++i) {
+ if ((int)d->viewItems.at(i).level > previousLevel) {
+ QModelIndex searchFrom = d->viewItems.at(i).index;
+ if (searchFrom.parent() == start.parent())
+ searchFrom = start;
+ QModelIndexList match = d->model->match(searchFrom, Qt::DisplayRole, searchString);
+ if (match.count()) {
+ int hitIndex = d->viewIndex(match.at(0));
+ if (hitIndex >= 0 && hitIndex < startIndex)
+ bestAbove = bestAbove == -1 ? hitIndex : qMin(hitIndex, bestAbove);
+ else if (hitIndex >= startIndex)
+ bestBelow = bestBelow == -1 ? hitIndex : qMin(hitIndex, bestBelow);
+ }
+ }
+ previousLevel = d->viewItems.at(i).level;
+ }
+
+ QModelIndex index;
+ if (bestBelow > -1)
+ index = d->viewItems.at(bestBelow).index;
+ else if (bestAbove > -1)
+ index = d->viewItems.at(bestAbove).index;
+
+ if (index.isValid()) {
+ QItemSelectionModel::SelectionFlags flags = (d->selectionMode == SingleSelection
+ ? QItemSelectionModel::SelectionFlags(
+ QItemSelectionModel::ClearAndSelect
+ |d->selectionBehaviorFlags())
+ : QItemSelectionModel::SelectionFlags(
+ QItemSelectionModel::NoUpdate));
+ selectionModel()->setCurrentIndex(index, flags);
+ }
+}
+
+/*!
+ Returns the rectangle on the viewport occupied by the item at \a index.
+ If the index is not visible or explicitly hidden, the returned rectangle is invalid.
+*/
+QRect QTreeView::visualRect(const QModelIndex &index) const
+{
+ Q_D(const QTreeView);
+
+ if (!d->isIndexValid(index) || isIndexHidden(index))
+ return QRect();
+
+ d->executePostedLayout();
+
+ int vi = d->viewIndex(index);
+ if (vi < 0)
+ return QRect();
+
+ bool spanning = d->viewItems.at(vi).spanning;
+
+ // if we have a spanning item, make the selection stretch from left to right
+ int x = (spanning ? 0 : columnViewportPosition(index.column()));
+ int w = (spanning ? d->header->length() : columnWidth(index.column()));
+ // handle indentation
+ if (index.column() == 0) {
+ int i = d->indentationForItem(vi);
+ w -= i;
+ if (!isRightToLeft())
+ x += i;
+ }
+
+ int y = d->coordinateForItem(vi);
+ int h = d->itemHeight(vi);
+
+ return QRect(x, y, w, h);
+}
+
+/*!
+ Scroll the contents of the tree view until the given model item
+ \a index is visible. The \a hint parameter specifies more
+ precisely where the item should be located after the
+ operation.
+ If any of the parents of the model item are collapsed, they will
+ be expanded to ensure that the model item is visible.
+*/
+void QTreeView::scrollTo(const QModelIndex &index, ScrollHint hint)
+{
+ Q_D(QTreeView);
+
+ if (!d->isIndexValid(index))
+ return;
+
+ d->executePostedLayout();
+ d->updateScrollBars();
+
+ // Expand all parents if the parent(s) of the node are not expanded.
+ QModelIndex parent = index.parent();
+ while (parent.isValid() && state() == NoState && d->itemsExpandable) {
+ if (!isExpanded(parent))
+ expand(parent);
+ parent = d->model->parent(parent);
+ }
+
+ int item = d->viewIndex(index);
+ if (item < 0)
+ return;
+
+ QRect area = d->viewport->rect();
+
+ // vertical
+ if (verticalScrollMode() == QAbstractItemView::ScrollPerItem) {
+ int top = verticalScrollBar()->value();
+ int bottom = top + verticalScrollBar()->pageStep();
+ if (hint == EnsureVisible && item >= top && item < bottom) {
+ // nothing to do
+ } else if (hint == PositionAtTop || (hint == EnsureVisible && item < top)) {
+ verticalScrollBar()->setValue(item);
+ } else { // PositionAtBottom or PositionAtCenter
+ int itemLocation = item;
+ int y = (hint == PositionAtCenter
+ ? area.height() / 2
+ : area.height());
+ while (y > 0 && item > 0)
+ y -= d->itemHeight(item--);
+ // end up half over the top of the area
+ if (y < 0 && item < itemLocation)
+ ++item;
+ // end up half over the bottom of the area
+ if (item >= 0 && item < itemLocation)
+ ++item;
+ verticalScrollBar()->setValue(item);
+ }
+ } else { // ScrollPerPixel
+ QRect rect(columnViewportPosition(index.column()),
+ d->coordinateForItem(item), // ### slow for items outside the view
+ columnWidth(index.column()),
+ d->itemHeight(item));
+
+ if (rect.isEmpty()) {
+ // nothing to do
+ } else if (hint == EnsureVisible && area.contains(rect)) {
+ d->setDirtyRegion(rect);
+ // nothing to do
+ } else {
+ bool above = (hint == EnsureVisible
+ && (rect.top() < area.top()
+ || area.height() < rect.height()));
+ bool below = (hint == EnsureVisible
+ && rect.bottom() > area.bottom()
+ && rect.height() < area.height());
+
+ int verticalValue = verticalScrollBar()->value();
+ if (hint == PositionAtTop || above)
+ verticalValue += rect.top();
+ else if (hint == PositionAtBottom || below)
+ verticalValue += rect.bottom() - area.height();
+ else if (hint == PositionAtCenter)
+ verticalValue += rect.top() - ((area.height() - rect.height()) / 2);
+ verticalScrollBar()->setValue(verticalValue);
+ }
+ }
+ // horizontal
+ int viewportWidth = d->viewport->width();
+ int horizontalOffset = d->header->offset();
+ int horizontalPosition = d->header->sectionPosition(index.column());
+ int cellWidth = d->header->sectionSize(index.column());
+
+ if (hint == PositionAtCenter) {
+ horizontalScrollBar()->setValue(horizontalPosition - ((viewportWidth - cellWidth) / 2));
+ } else {
+ if (horizontalPosition - horizontalOffset < 0 || cellWidth > viewportWidth)
+ horizontalScrollBar()->setValue(horizontalPosition);
+ else if (horizontalPosition - horizontalOffset + cellWidth > viewportWidth)
+ horizontalScrollBar()->setValue(horizontalPosition - viewportWidth + cellWidth);
+ }
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::timerEvent(QTimerEvent *event)
+{
+ Q_D(QTreeView);
+ if (event->timerId() == d->columnResizeTimerID) {
+ updateGeometries();
+ killTimer(d->columnResizeTimerID);
+ d->columnResizeTimerID = 0;
+ QRect rect;
+ int viewportHeight = d->viewport->height();
+ int viewportWidth = d->viewport->width();
+ for (int i = d->columnsToUpdate.size() - 1; i >= 0; --i) {
+ int column = d->columnsToUpdate.at(i);
+ int x = columnViewportPosition(column);
+ if (isRightToLeft())
+ rect |= QRect(0, 0, x + columnWidth(column), viewportHeight);
+ else
+ rect |= QRect(x, 0, viewportWidth - x, viewportHeight);
+ }
+ d->viewport->update(rect.normalized());
+ d->columnsToUpdate.clear();
+ } else if (event->timerId() == d->openTimer.timerId()) {
+ QPoint pos = d->viewport->mapFromGlobal(QCursor::pos());
+ if (state() == QAbstractItemView::DraggingState
+ && d->viewport->rect().contains(pos)) {
+ QModelIndex index = indexAt(pos);
+ setExpanded(index, !isExpanded(index));
+ }
+ d->openTimer.stop();
+ }
+
+ QAbstractItemView::timerEvent(event);
+}
+
+/*!
+ \reimp
+*/
+#ifndef QT_NO_DRAGANDDROP
+void QTreeView::dragMoveEvent(QDragMoveEvent *event)
+{
+ Q_D(QTreeView);
+ if (d->autoExpandDelay >= 0)
+ d->openTimer.start(d->autoExpandDelay, this);
+ QAbstractItemView::dragMoveEvent(event);
+}
+#endif
+
+/*!
+ \reimp
+*/
+bool QTreeView::viewportEvent(QEvent *event)
+{
+ Q_D(QTreeView);
+ switch (event->type()) {
+ case QEvent::HoverEnter:
+ case QEvent::HoverLeave:
+ case QEvent::HoverMove: {
+ QHoverEvent *he = static_cast<QHoverEvent*>(event);
+ int oldBranch = d->hoverBranch;
+ d->hoverBranch = d->itemDecorationAt(he->pos());
+ if (oldBranch != d->hoverBranch) {
+ QModelIndex oldIndex = d->modelIndex(oldBranch),
+ newIndex = d->modelIndex(d->hoverBranch);
+ if (oldIndex != newIndex) {
+ QRect oldRect = visualRect(oldIndex);
+ QRect newRect = visualRect(newIndex);
+ viewport()->update(oldRect.left() - d->indent, oldRect.top(), d->indent, oldRect.height());
+ viewport()->update(newRect.left() - d->indent, newRect.top(), d->indent, newRect.height());
+ }
+ }
+ if (selectionBehavior() == QAbstractItemView::SelectRows) {
+ QModelIndex newHoverIndex = indexAt(he->pos());
+ if (d->hover != newHoverIndex) {
+ QRect oldHoverRect = visualRect(d->hover);
+ QRect newHoverRect = visualRect(newHoverIndex);
+ viewport()->update(QRect(0, newHoverRect.y(), viewport()->width(), newHoverRect.height()));
+ viewport()->update(QRect(0, oldHoverRect.y(), viewport()->width(), oldHoverRect.height()));
+ }
+ }
+ break; }
+ default:
+ break;
+ }
+ return QAbstractItemView::viewportEvent(event);
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::paintEvent(QPaintEvent *event)
+{
+ Q_D(QTreeView);
+ d->executePostedLayout();
+ QPainter painter(viewport());
+ if (d->isAnimating()) {
+ drawTree(&painter, event->region() - d->animationRect());
+ d->drawAnimatedOperation(&painter);
+ } else {
+ drawTree(&painter, event->region());
+#ifndef QT_NO_DRAGANDDROP
+ d->paintDropIndicator(&painter);
+#endif
+ }
+}
+
+void QTreeViewPrivate::paintAlternatingRowColors(QPainter *painter, QStyleOptionViewItemV4 *option, int y, int bottom) const
+{
+ Q_Q(const QTreeView);
+ if (!alternatingColors || !q->style()->styleHint(QStyle::SH_ItemView_PaintAlternatingRowColorsForEmptyArea, option, q))
+ return;
+ int rowHeight = defaultItemHeight;
+ if (rowHeight <= 0) {
+ rowHeight = itemDelegate->sizeHint(*option, QModelIndex()).height();
+ if (rowHeight <= 0)
+ return;
+ }
+ while (y <= bottom) {
+ option->rect.setRect(0, y, viewport->width(), rowHeight);
+ if (current & 1) {
+ option->features |= QStyleOptionViewItemV2::Alternate;
+ } else {
+ option->features &= ~QStyleOptionViewItemV2::Alternate;
+ }
+ ++current;
+ q->style()->drawPrimitive(QStyle::PE_PanelItemViewRow, option, painter, q);
+ y += rowHeight;
+ }
+}
+
+bool QTreeViewPrivate::expandOrCollapseItemAtPos(const QPoint &pos)
+{
+ Q_Q(QTreeView);
+ // we want to handle mousePress in EditingState (persistent editors)
+ if ((q->state() != QAbstractItemView::NoState
+ && q->state() != QAbstractItemView::EditingState)
+ || !viewport->rect().contains(pos))
+ return true;
+
+ int i = itemDecorationAt(pos);
+ if ((i != -1) && q->itemsExpandable() && hasVisibleChildren(viewItems.at(i).index)) {
+ if (viewItems.at(i).expanded)
+ collapse(i, true);
+ else
+ expand(i, true);
+ if (!isAnimating()) {
+ q->updateGeometries();
+ q->viewport()->update();
+ }
+ return true;
+ }
+ return false;
+}
+
+void QTreeViewPrivate::_q_modelDestroyed()
+{
+ //we need to clear that list because it contais QModelIndex to
+ //the model currently being destroyed
+ viewItems.clear();
+ QAbstractItemViewPrivate::_q_modelDestroyed();
+}
+
+/*!
+ \since 4.2
+ Draws the part of the tree intersecting the given \a region using the specified
+ \a painter.
+
+ \sa paintEvent()
+*/
+void QTreeView::drawTree(QPainter *painter, const QRegion &region) const
+{
+ Q_D(const QTreeView);
+ const QVector<QTreeViewItem> viewItems = d->viewItems;
+
+ QStyleOptionViewItemV4 option = d->viewOptionsV4();
+ const QStyle::State state = option.state;
+ d->current = 0;
+
+ if (viewItems.count() == 0 || d->header->count() == 0 || !d->itemDelegate) {
+ d->paintAlternatingRowColors(painter, &option, 0, region.boundingRect().bottom()+1);
+ return;
+ }
+
+ int firstVisibleItemOffset = 0;
+ const int firstVisibleItem = d->firstVisibleItem(&firstVisibleItemOffset);
+ if (firstVisibleItem < 0) {
+ d->paintAlternatingRowColors(painter, &option, 0, region.boundingRect().bottom()+1);
+ return;
+ }
+
+ const int viewportWidth = d->viewport->width();
+
+ QVector<QRect> rects = region.rects();
+ QVector<int> drawn;
+ bool multipleRects = (rects.size() > 1);
+ for (int a = 0; a < rects.size(); ++a) {
+ const QRect area = (multipleRects
+ ? QRect(0, rects.at(a).y(), viewportWidth, rects.at(a).height())
+ : rects.at(a));
+ d->leftAndRight = d->startAndEndColumns(area);
+
+ int i = firstVisibleItem; // the first item at the top of the viewport
+ int y = firstVisibleItemOffset; // we may only see part of the first item
+
+ // start at the top of the viewport and iterate down to the update area
+ for (; i < viewItems.count(); ++i) {
+ const int itemHeight = d->itemHeight(i);
+ if (y + itemHeight > area.top())
+ break;
+ y += itemHeight;
+ }
+
+ // paint the visible rows
+ for (; i < viewItems.count() && y <= area.bottom(); ++i) {
+ const int itemHeight = d->itemHeight(i);
+ option.rect.setRect(0, y, viewportWidth, itemHeight);
+ option.state = state | (viewItems.at(i).expanded
+ ? QStyle::State_Open : QStyle::State_None);
+ d->current = i;
+ d->spanning = viewItems.at(i).spanning;
+ if (!multipleRects || !drawn.contains(i)) {
+ drawRow(painter, option, viewItems.at(i).index);
+ if (multipleRects) // even if the rect only intersects the item,
+ drawn.append(i); // the entire item will be painted
+ }
+ y += itemHeight;
+ }
+
+ if (y <= area.bottom()) {
+ d->current = i;
+ d->paintAlternatingRowColors(painter, &option, y, area.bottom());
+ }
+ }
+}
+
+/// ### move to QObject :)
+static inline bool ancestorOf(QObject *widget, QObject *other)
+{
+ for (QObject *parent = other; parent != 0; parent = parent->parent()) {
+ if (parent == widget)
+ return true;
+ }
+ return false;
+}
+
+/*!
+ Draws the row in the tree view that contains the model item \a index,
+ using the \a painter given. The \a option control how the item is
+ displayed.
+
+ \sa setAlternatingRowColors()
+*/
+void QTreeView::drawRow(QPainter *painter, const QStyleOptionViewItem &option,
+ const QModelIndex &index) const
+{
+ Q_D(const QTreeView);
+ QStyleOptionViewItemV4 opt = option;
+ const QPoint offset = d->scrollDelayOffset;
+ const int y = option.rect.y() + offset.y();
+ const QModelIndex parent = index.parent();
+ const QHeaderView *header = d->header;
+ const QModelIndex current = currentIndex();
+ const QModelIndex hover = d->hover;
+ const bool reverse = isRightToLeft();
+ const QStyle::State state = opt.state;
+ const bool spanning = d->spanning;
+ const int left = (spanning ? header->visualIndex(0) : d->leftAndRight.first);
+ const int right = (spanning ? header->visualIndex(0) : d->leftAndRight.second);
+ const bool alternate = d->alternatingColors;
+ const bool enabled = (state & QStyle::State_Enabled) != 0;
+ const bool allColumnsShowFocus = d->allColumnsShowFocus;
+
+
+ // when the row contains an index widget which has focus,
+ // we want to paint the entire row as active
+ bool indexWidgetHasFocus = false;
+ if ((current.row() == index.row()) && !d->editors.isEmpty()) {
+ const int r = index.row();
+ QWidget *fw = QApplication::focusWidget();
+ for (int c = 0; c < header->count(); ++c) {
+ QModelIndex idx = d->model->index(r, c, parent);
+ if (QWidget *editor = indexWidget(idx)) {
+ if (ancestorOf(editor, fw)) {
+ indexWidgetHasFocus = true;
+ break;
+ }
+ }
+ }
+ }
+
+ const bool widgetHasFocus = hasFocus();
+ bool currentRowHasFocus = false;
+ if (allColumnsShowFocus && widgetHasFocus && current.isValid()) {
+ // check if the focus index is before or after the visible columns
+ const int r = index.row();
+ for (int c = 0; c < left && !currentRowHasFocus; ++c) {
+ QModelIndex idx = d->model->index(r, c, parent);
+ currentRowHasFocus = (idx == current);
+ }
+ QModelIndex parent = d->model->parent(index);
+ for (int c = right; c < header->count() && !currentRowHasFocus; ++c) {
+ currentRowHasFocus = (d->model->index(r, c, parent) == current);
+ }
+ }
+
+ // ### special case: treeviews with multiple columns draw
+ // the selections differently than with only one column
+ opt.showDecorationSelected = (d->selectionBehavior & SelectRows)
+ || option.showDecorationSelected;
+
+ int width, height = option.rect.height();
+ int position;
+ QModelIndex modelIndex;
+ int columnCount = header->count();
+ const bool hoverRow = selectionBehavior() == QAbstractItemView::SelectRows
+ && index.parent() == hover.parent()
+ && index.row() == hover.row();
+
+ /* 'left' and 'right' are the left-most and right-most visible visual indices.
+ Compute the first visible logical indices before and after the left and right.
+ We will use these values to determine the QStyleOptionViewItemV4::viewItemPosition. */
+ int logicalIndexBeforeLeft = -1, logicalIndexAfterRight = -1;
+ for (int visualIndex = left - 1; visualIndex >= 0; --visualIndex) {
+ int logicalIndex = header->logicalIndex(visualIndex);
+ if (!header->isSectionHidden(logicalIndex)) {
+ logicalIndexBeforeLeft = logicalIndex;
+ break;
+ }
+ }
+ QVector<int> logicalIndices; // vector of currently visibly logical indices
+ for (int visualIndex = left; visualIndex < columnCount; ++visualIndex) {
+ int logicalIndex = header->logicalIndex(visualIndex);
+ if (!header->isSectionHidden(logicalIndex)) {
+ if (visualIndex > right) {
+ logicalIndexAfterRight = logicalIndex;
+ break;
+ }
+ logicalIndices.append(logicalIndex);
+ }
+ }
+
+ for (int currentLogicalSection = 0; currentLogicalSection < logicalIndices.count(); ++currentLogicalSection) {
+ int headerSection = logicalIndices.at(currentLogicalSection);
+ position = columnViewportPosition(headerSection) + offset.x();
+ width = header->sectionSize(headerSection);
+
+ if (spanning) {
+ int lastSection = header->logicalIndex(header->count() - 1);
+ if (!reverse) {
+ width = columnViewportPosition(lastSection) + header->sectionSize(lastSection) - position;
+ } else {
+ width += position - columnViewportPosition(lastSection);
+ position = columnViewportPosition(lastSection);
+ }
+ }
+
+ modelIndex = d->model->index(index.row(), headerSection, parent);
+ if (!modelIndex.isValid())
+ continue;
+ opt.state = state;
+
+ // determine the viewItemPosition depending on the position of column 0
+ int nextLogicalSection = currentLogicalSection + 1 >= logicalIndices.count()
+ ? logicalIndexAfterRight
+ : logicalIndices.at(currentLogicalSection + 1);
+ int prevLogicalSection = currentLogicalSection - 1 < 0
+ ? logicalIndexBeforeLeft
+ : logicalIndices.at(currentLogicalSection - 1);
+ if (columnCount == 1 || (nextLogicalSection == 0 && prevLogicalSection == -1)
+ || (headerSection == 0 && nextLogicalSection == -1))
+ opt.viewItemPosition = QStyleOptionViewItemV4::OnlyOne;
+ else if (headerSection == 0 || (nextLogicalSection != 0 && prevLogicalSection == -1))
+ opt.viewItemPosition = QStyleOptionViewItemV4::Beginning;
+ else if (nextLogicalSection == 0 || nextLogicalSection == -1)
+ opt.viewItemPosition = QStyleOptionViewItemV4::End;
+ else
+ opt.viewItemPosition = QStyleOptionViewItemV4::Middle;
+
+ // fake activeness when row editor has focus
+ if (indexWidgetHasFocus)
+ opt.state |= QStyle::State_Active;
+
+ if (d->selectionModel->isSelected(modelIndex))
+ opt.state |= QStyle::State_Selected;
+ if (widgetHasFocus && (current == modelIndex)) {
+ if (allColumnsShowFocus)
+ currentRowHasFocus = true;
+ else
+ opt.state |= QStyle::State_HasFocus;
+ }
+ if ((hoverRow || modelIndex == hover)
+ && (option.showDecorationSelected || (d->hoverBranch == -1)))
+ opt.state |= QStyle::State_MouseOver;
+ else
+ opt.state &= ~QStyle::State_MouseOver;
+
+ if (enabled) {
+ QPalette::ColorGroup cg;
+ if ((d->model->flags(modelIndex) & Qt::ItemIsEnabled) == 0) {
+ opt.state &= ~QStyle::State_Enabled;
+ cg = QPalette::Disabled;
+ } else if (opt.state & QStyle::State_Active) {
+ cg = QPalette::Active;
+ } else {
+ cg = QPalette::Inactive;
+ }
+ opt.palette.setCurrentColorGroup(cg);
+ }
+
+ if (alternate) {
+ if (d->current & 1) {
+ opt.features |= QStyleOptionViewItemV2::Alternate;
+ } else {
+ opt.features &= ~QStyleOptionViewItemV2::Alternate;
+ }
+ }
+
+ /* Prior to Qt 4.3, the background of the branch (in selected state and
+ alternate row color was provided by the view. For backward compatibility,
+ this is now delegated to the style using PE_PanelViewItemRow which
+ does the appropriate fill */
+ if (headerSection == 0) {
+ const int i = d->indentationForItem(d->current);
+ QRect branches(reverse ? position + width - i : position, y, i, height);
+ const bool setClipRect = branches.width() > width;
+ if (setClipRect) {
+ painter->save();
+ painter->setClipRect(QRect(position, y, width, height));
+ }
+ // draw background for the branch (selection + alternate row)
+ opt.rect = branches;
+ style()->drawPrimitive(QStyle::PE_PanelItemViewRow, &opt, painter, this);
+
+ // draw background of the item (only alternate row). rest of the background
+ // is provided by the delegate
+ QStyle::State oldState = opt.state;
+ opt.state &= ~QStyle::State_Selected;
+ opt.rect.setRect(reverse ? position : i + position, y, width - i, height);
+ style()->drawPrimitive(QStyle::PE_PanelItemViewRow, &opt, painter, this);
+ opt.state = oldState;
+
+ drawBranches(painter, branches, index);
+ if (setClipRect)
+ painter->restore();
+ } else {
+ QStyle::State oldState = opt.state;
+ opt.state &= ~QStyle::State_Selected;
+ opt.rect.setRect(position, y, width, height);
+ style()->drawPrimitive(QStyle::PE_PanelItemViewRow, &opt, painter, this);
+ opt.state = oldState;
+ }
+
+ if (const QWidget *widget = d->editorForIndex(modelIndex).editor) {
+ painter->save();
+ painter->setClipRect(widget->geometry());
+ d->delegateForIndex(modelIndex)->paint(painter, opt, modelIndex);
+ painter->restore();
+ } else {
+ d->delegateForIndex(modelIndex)->paint(painter, opt, modelIndex);
+ }
+ }
+
+ if (currentRowHasFocus) {
+ QStyleOptionFocusRect o;
+ o.QStyleOption::operator=(option);
+ o.state |= QStyle::State_KeyboardFocusChange;
+ QPalette::ColorGroup cg = (option.state & QStyle::State_Enabled)
+ ? QPalette::Normal : QPalette::Disabled;
+ o.backgroundColor = option.palette.color(cg, d->selectionModel->isSelected(index)
+ ? QPalette::Highlight : QPalette::Background);
+ int x = 0;
+ if (!option.showDecorationSelected)
+ x = header->sectionPosition(0) + d->indentationForItem(d->current);
+ QRect focusRect(x - header->offset(), y, header->length() - x, height);
+ o.rect = style()->visualRect(layoutDirection(), d->viewport->rect(), focusRect);
+ style()->drawPrimitive(QStyle::PE_FrameFocusRect, &o, painter);
+ // if we show focus on all columns and the first section is moved,
+ // we have to split the focus rect into two rects
+ if (allColumnsShowFocus && !option.showDecorationSelected
+ && header->sectionsMoved() && (header->visualIndex(0) != 0)) {
+ QRect sectionRect(0, y, header->sectionPosition(0), height);
+ o.rect = style()->visualRect(layoutDirection(), d->viewport->rect(), sectionRect);
+ style()->drawPrimitive(QStyle::PE_FrameFocusRect, &o, painter);
+ }
+ }
+}
+
+/*!
+ Draws the branches in the tree view on the same row as the model item
+ \a index, using the \a painter given. The branches are drawn in the
+ rectangle specified by \a rect.
+*/
+void QTreeView::drawBranches(QPainter *painter, const QRect &rect,
+ const QModelIndex &index) const
+{
+ Q_D(const QTreeView);
+ const bool reverse = isRightToLeft();
+ const int indent = d->indent;
+ const int outer = d->rootDecoration ? 0 : 1;
+ const int item = d->current;
+ const QTreeViewItem &viewItem = d->viewItems.at(item);
+ int level = viewItem.level;
+ QRect primitive(reverse ? rect.left() : rect.right() + 1, rect.top(), indent, rect.height());
+
+ QModelIndex parent = index.parent();
+ QModelIndex current = parent;
+ QModelIndex ancestor = current.parent();
+
+ QStyleOptionViewItemV2 opt = viewOptions();
+ QStyle::State extraFlags = QStyle::State_None;
+ if (isEnabled())
+ extraFlags |= QStyle::State_Enabled;
+ if (window()->isActiveWindow())
+ extraFlags |= QStyle::State_Active;
+ QPoint oldBO = painter->brushOrigin();
+ if (verticalScrollMode() == QAbstractItemView::ScrollPerPixel)
+ painter->setBrushOrigin(QPoint(0, verticalOffset()));
+
+ if (d->alternatingColors) {
+ if (d->current & 1) {
+ opt.features |= QStyleOptionViewItemV2::Alternate;
+ } else {
+ opt.features &= ~QStyleOptionViewItemV2::Alternate;
+ }
+ }
+
+ // When hovering over a row, pass State_Hover for painting the branch
+ // indicators if it has the decoration (aka branch) selected.
+ bool hoverRow = selectionBehavior() == QAbstractItemView::SelectRows
+ && opt.showDecorationSelected
+ && index.parent() == d->hover.parent()
+ && index.row() == d->hover.row();
+
+ if (d->selectionModel->isSelected(index))
+ extraFlags |= QStyle::State_Selected;
+
+ if (level >= outer) {
+ // start with the innermost branch
+ primitive.moveLeft(reverse ? primitive.left() : primitive.left() - indent);
+ opt.rect = primitive;
+
+ const bool expanded = viewItem.expanded;
+ const bool children = (((expanded && viewItem.total > 0)) // already laid out and has children
+ || d->hasVisibleChildren(index)); // not laid out yet, so we don't know
+ bool moreSiblings = false;
+ if (d->hiddenIndexes.isEmpty())
+ moreSiblings = (d->model->rowCount(parent) - 1 > index.row());
+ else
+ moreSiblings = ((d->viewItems.size() > item +1)
+ && (d->viewItems.at(item + 1).index.parent() == parent));
+
+ opt.state = QStyle::State_Item | extraFlags
+ | (moreSiblings ? QStyle::State_Sibling : QStyle::State_None)
+ | (children ? QStyle::State_Children : QStyle::State_None)
+ | (expanded ? QStyle::State_Open : QStyle::State_None);
+ if (hoverRow || item == d->hoverBranch)
+ opt.state |= QStyle::State_MouseOver;
+ else
+ opt.state &= ~QStyle::State_MouseOver;
+ style()->drawPrimitive(QStyle::PE_IndicatorBranch, &opt, painter, this);
+ }
+ // then go out level by level
+ for (--level; level >= outer; --level) { // we have already drawn the innermost branch
+ primitive.moveLeft(reverse ? primitive.left() + indent : primitive.left() - indent);
+ opt.rect = primitive;
+ opt.state = extraFlags;
+ bool moreSiblings = false;
+ if (d->hiddenIndexes.isEmpty()) {
+ moreSiblings = (d->model->rowCount(ancestor) - 1 > current.row());
+ } else {
+ int successor = item + viewItem.total + 1;
+ while (successor < d->viewItems.size()
+ && d->viewItems.at(successor).level >= uint(level)) {
+ const QTreeViewItem &successorItem = d->viewItems.at(successor);
+ if (successorItem.level == uint(level)) {
+ moreSiblings = true;
+ break;
+ }
+ successor += successorItem.total + 1;
+ }
+ }
+ if (moreSiblings)
+ opt.state |= QStyle::State_Sibling;
+ if (hoverRow || item == d->hoverBranch)
+ opt.state |= QStyle::State_MouseOver;
+ else
+ opt.state &= ~QStyle::State_MouseOver;
+ style()->drawPrimitive(QStyle::PE_IndicatorBranch, &opt, painter, this);
+ current = ancestor;
+ ancestor = current.parent();
+ }
+ painter->setBrushOrigin(oldBO);
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::mousePressEvent(QMouseEvent *event)
+{
+ Q_D(QTreeView);
+ bool handled = false;
+ if (style()->styleHint(QStyle::SH_Q3ListViewExpand_SelectMouseType, 0, this) == QEvent::MouseButtonPress)
+ handled = d->expandOrCollapseItemAtPos(event->pos());
+ if (!handled && d->itemDecorationAt(event->pos()) == -1)
+ QAbstractItemView::mousePressEvent(event);
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::mouseReleaseEvent(QMouseEvent *event)
+{
+ Q_D(QTreeView);
+ if (d->itemDecorationAt(event->pos()) == -1) {
+ QAbstractItemView::mouseReleaseEvent(event);
+ } else {
+ if (state() == QAbstractItemView::DragSelectingState)
+ setState(QAbstractItemView::NoState);
+ if (style()->styleHint(QStyle::SH_Q3ListViewExpand_SelectMouseType, 0, this) == QEvent::MouseButtonRelease)
+ d->expandOrCollapseItemAtPos(event->pos());
+ }
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::mouseDoubleClickEvent(QMouseEvent *event)
+{
+ Q_D(QTreeView);
+ if (state() != NoState || !d->viewport->rect().contains(event->pos()))
+ return;
+
+ int i = d->itemDecorationAt(event->pos());
+ if (i == -1) {
+ i = d->itemAtCoordinate(event->y());
+ if (i == -1)
+ return; // user clicked outside the items
+
+ const QModelIndex &index = d->viewItems.at(i).index;
+
+ int column = d->header->logicalIndexAt(event->x());
+ QPersistentModelIndex persistent = index.sibling(index.row(), column);
+
+ if (d->pressedIndex != persistent) {
+ mousePressEvent(event);
+ return;
+ }
+
+ // signal handlers may change the model
+ emit doubleClicked(persistent);
+
+ if (!persistent.isValid())
+ return;
+
+ if (edit(persistent, DoubleClicked, event) || state() != NoState)
+ return; // the double click triggered editing
+
+ if (!style()->styleHint(QStyle::SH_ItemView_ActivateItemOnSingleClick, 0, this))
+ emit activated(persistent);
+
+ d->executePostedLayout(); // we need to make sure viewItems is updated
+ if (d->itemsExpandable
+ && d->expandsOnDoubleClick
+ && d->hasVisibleChildren(persistent)) {
+ if (!((i < d->viewItems.count()) && (d->viewItems.at(i).index == persistent))) {
+ // find the new index of the item
+ for (i = 0; i < d->viewItems.count(); ++i) {
+ if (d->viewItems.at(i).index == persistent)
+ break;
+ }
+ if (i == d->viewItems.count())
+ return;
+ }
+ if (d->viewItems.at(i).expanded)
+ d->collapse(i, true);
+ else
+ d->expand(i, true);
+ updateGeometries();
+ viewport()->update();
+ }
+ }
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::mouseMoveEvent(QMouseEvent *event)
+{
+ Q_D(QTreeView);
+ if (d->itemDecorationAt(event->pos()) == -1) // ### what about expanding/collapsing state ?
+ QAbstractItemView::mouseMoveEvent(event);
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::keyPressEvent(QKeyEvent *event)
+{
+ Q_D(QTreeView);
+ QModelIndex current = currentIndex();
+ //this is the management of the expansion
+ if (d->isIndexValid(current) && d->model && d->itemsExpandable) {
+ switch (event->key()) {
+ case Qt::Key_Asterisk: {
+ QStack<QModelIndex> parents;
+ parents.push(current);
+ while (!parents.isEmpty()) {
+ QModelIndex parent = parents.pop();
+ for (int row = 0; row < d->model->rowCount(parent); ++row) {
+ QModelIndex child = d->model->index(row, 0, parent);
+ if (!d->isIndexValid(child))
+ break;
+ parents.push(child);
+ expand(child);
+ }
+ }
+ expand(current);
+ break; }
+ case Qt::Key_Plus:
+ expand(current);
+ break;
+ case Qt::Key_Minus:
+ collapse(current);
+ break;
+ }
+ }
+
+ QAbstractItemView::keyPressEvent(event);
+}
+
+/*!
+ \reimp
+*/
+QModelIndex QTreeView::indexAt(const QPoint &point) const
+{
+ Q_D(const QTreeView);
+ d->executePostedLayout();
+
+ int visualIndex = d->itemAtCoordinate(point.y());
+ QModelIndex idx = d->modelIndex(visualIndex);
+ if (!idx.isValid())
+ return QModelIndex();
+
+ if (d->viewItems.at(visualIndex).spanning)
+ return idx;
+
+ int column = d->columnAt(point.x());
+ if (column == idx.column())
+ return idx;
+ if (column < 0)
+ return QModelIndex();
+ return idx.sibling(idx.row(), column);
+}
+
+/*!
+ Returns the model index of the item above \a index.
+*/
+QModelIndex QTreeView::indexAbove(const QModelIndex &index) const
+{
+ Q_D(const QTreeView);
+ if (!d->isIndexValid(index))
+ return QModelIndex();
+ d->executePostedLayout();
+ int i = d->viewIndex(index);
+ if (--i < 0)
+ return QModelIndex();
+ return d->viewItems.at(i).index;
+}
+
+/*!
+ Returns the model index of the item below \a index.
+*/
+QModelIndex QTreeView::indexBelow(const QModelIndex &index) const
+{
+ Q_D(const QTreeView);
+ if (!d->isIndexValid(index))
+ return QModelIndex();
+ d->executePostedLayout();
+ int i = d->viewIndex(index);
+ if (++i >= d->viewItems.count())
+ return QModelIndex();
+ return d->viewItems.at(i).index;
+}
+
+/*!
+ \internal
+
+ Lays out the items in the tree view.
+*/
+void QTreeView::doItemsLayout()
+{
+ Q_D(QTreeView);
+ d->viewItems.clear(); // prepare for new layout
+ QModelIndex parent = d->root;
+ if (d->model->hasChildren(parent)) {
+ d->layout(-1);
+ }
+ QAbstractItemView::doItemsLayout();
+ d->header->doItemsLayout();
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::reset()
+{
+ Q_D(QTreeView);
+ d->expandedIndexes.clear();
+ d->hiddenIndexes.clear();
+ d->spanningIndexes.clear();
+ d->viewItems.clear();
+ QAbstractItemView::reset();
+}
+
+/*!
+ Returns the horizontal offset of the items in the treeview.
+
+ Note that the tree view uses the horizontal header section
+ positions to determine the positions of columns in the view.
+
+ \sa verticalOffset()
+*/
+int QTreeView::horizontalOffset() const
+{
+ Q_D(const QTreeView);
+ return d->header->offset();
+}
+
+/*!
+ Returns the vertical offset of the items in the tree view.
+
+ \sa horizontalOffset()
+*/
+int QTreeView::verticalOffset() const
+{
+ Q_D(const QTreeView);
+ if (d->verticalScrollMode == QAbstractItemView::ScrollPerItem) {
+ if (d->uniformRowHeights)
+ return verticalScrollBar()->value() * d->defaultItemHeight;
+ // If we are scrolling per item and have non-uniform row heights,
+ // finding the vertical offset in pixels is going to be relatively slow.
+ // ### find a faster way to do this
+ int offset = 0;
+ for (int i = 0; i < d->viewItems.count(); ++i) {
+ if (i == verticalScrollBar()->value())
+ return offset;
+ offset += d->itemHeight(i);
+ }
+ return 0;
+ }
+ // scroll per pixel
+ return verticalScrollBar()->value();
+}
+
+/*!
+ Move the cursor in the way described by \a cursorAction, using the
+ information provided by the button \a modifiers.
+*/
+QModelIndex QTreeView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
+{
+ Q_D(QTreeView);
+ Q_UNUSED(modifiers);
+
+ d->executePostedLayout();
+
+ QModelIndex current = currentIndex();
+ if (!current.isValid()) {
+ int i = d->below(-1);
+ int c = 0;
+ while (c < d->header->count() && d->header->isSectionHidden(c))
+ ++c;
+ if (i < d->viewItems.count() && c < d->header->count()) {
+ return d->modelIndex(i, c);
+ }
+ return QModelIndex();
+ }
+ int vi = -1;
+#if defined(Q_WS_MAC) && !defined(QT_NO_STYLE_MAC)
+ // Selection behavior is slightly different on the Mac.
+ if (d->selectionMode == QAbstractItemView::ExtendedSelection
+ && d->selectionModel
+ && d->selectionModel->hasSelection()) {
+
+ const bool moveUpDown = (cursorAction == MoveUp || cursorAction == MoveDown);
+ const bool moveNextPrev = (cursorAction == MoveNext || cursorAction == MovePrevious);
+ const bool contiguousSelection = moveUpDown && (modifiers & Qt::ShiftModifier);
+
+ // Use the outermost index in the selection as the current index
+ if (!contiguousSelection && (moveUpDown || moveNextPrev)) {
+
+ // Find outermost index.
+ const bool useTopIndex = (cursorAction == MoveUp || cursorAction == MovePrevious);
+ int index = useTopIndex ? INT_MAX : INT_MIN;
+ const QItemSelection selection = d->selectionModel->selection();
+ foreach (const QItemSelectionRange &range, selection) {
+ int candidate = d->viewIndex(useTopIndex ? range.topLeft() : range.bottomRight());
+ if (candidate >= 0)
+ index = useTopIndex ? qMin(index, candidate) : qMax(index, candidate);
+ }
+
+ if (index >= 0 && index < INT_MAX)
+ vi = index;
+ }
+ }
+#endif
+ if (vi < 0)
+ vi = qMax(0, d->viewIndex(current));
+
+ switch (cursorAction) {
+ case MoveNext:
+ case MoveDown:
+#ifdef QT_KEYPAD_NAVIGATION
+ if (vi == d->viewItems.count()-1 && QApplication::keypadNavigationEnabled())
+ return d->model->index(0, current.column(), d->root);
+#endif
+ return d->modelIndex(d->below(vi), current.column());
+ case MovePrevious:
+ case MoveUp:
+#ifdef QT_KEYPAD_NAVIGATION
+ if (vi == 0 && QApplication::keypadNavigationEnabled())
+ return d->modelIndex(d->viewItems.count() - 1, current.column());
+#endif
+ return d->modelIndex(d->above(vi), current.column());
+ case MoveLeft: {
+ QScrollBar *sb = horizontalScrollBar();
+ if (vi < d->viewItems.count() && d->viewItems.at(vi).expanded && d->itemsExpandable && sb->value() == sb->minimum())
+ d->collapse(vi, true);
+ else {
+ bool descend = style()->styleHint(QStyle::SH_ItemView_ArrowKeysNavigateIntoChildren, 0, this);
+ if (descend) {
+ QModelIndex par = current.parent();
+ if (par.isValid() && par != rootIndex())
+ return par;
+ else
+ descend = false;
+ }
+ if (!descend) {
+ if (d->selectionBehavior == SelectItems || d->selectionBehavior == SelectColumns) {
+ int visualColumn = d->header->visualIndex(current.column()) - 1;
+ while (visualColumn >= 0 && isColumnHidden(d->header->logicalIndex(visualColumn)))
+ visualColumn--;
+ int newColumn = d->header->logicalIndex(visualColumn);
+ QModelIndex next = current.sibling(current.row(), newColumn);
+ if (next.isValid())
+ return next;
+ }
+
+ sb->setValue(sb->value() - sb->singleStep());
+ }
+
+ }
+ updateGeometries();
+ viewport()->update();
+ break;
+ }
+ case MoveRight:
+ if (vi < d->viewItems.count() && !d->viewItems.at(vi).expanded && d->itemsExpandable
+ && d->hasVisibleChildren(d->viewItems.at(vi).index)) {
+ d->expand(vi, true);
+ } else {
+ bool descend = style()->styleHint(QStyle::SH_ItemView_ArrowKeysNavigateIntoChildren, 0, this);
+ if (descend) {
+ QModelIndex idx = d->modelIndex(d->below(vi));
+ if (idx.parent() == current)
+ return idx;
+ else
+ descend = false;
+ }
+ if (!descend) {
+ if (d->selectionBehavior == SelectItems || d->selectionBehavior == SelectColumns) {
+ int visualColumn = d->header->visualIndex(current.column()) + 1;
+ while (visualColumn < d->model->columnCount(current.parent()) && isColumnHidden(d->header->logicalIndex(visualColumn)))
+ visualColumn++;
+
+ QModelIndex next = current.sibling(current.row(), visualColumn);
+ if (next.isValid())
+ return next;
+ }
+
+ //last restort: we change the scrollbar value
+ QScrollBar *sb = horizontalScrollBar();
+ sb->setValue(sb->value() + sb->singleStep());
+ }
+ }
+ updateGeometries();
+ viewport()->update();
+ break;
+ case MovePageUp:
+ return d->modelIndex(d->pageUp(vi), current.column());
+ case MovePageDown:
+ return d->modelIndex(d->pageDown(vi), current.column());
+ case MoveHome:
+ return d->model->index(0, current.column(), d->root);
+ case MoveEnd:
+ return d->modelIndex(d->viewItems.count() - 1, current.column());
+ }
+ return current;
+}
+
+/*!
+ Applies the selection \a command to the items in or touched by the
+ rectangle, \a rect.
+
+ \sa selectionCommand()
+*/
+void QTreeView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command)
+{
+ Q_D(QTreeView);
+ if (!selectionModel() || rect.isNull())
+ return;
+
+ d->executePostedLayout();
+ QPoint tl(isRightToLeft() ? qMax(rect.left(), rect.right())
+ : qMin(rect.left(), rect.right()), qMin(rect.top(), rect.bottom()));
+ QPoint br(isRightToLeft() ? qMin(rect.left(), rect.right()) :
+ qMax(rect.left(), rect.right()), qMax(rect.top(), rect.bottom()));
+ QModelIndex topLeft = indexAt(tl);
+ QModelIndex bottomRight = indexAt(br);
+ if (!topLeft.isValid() && !bottomRight.isValid()) {
+ if (command & QItemSelectionModel::Clear)
+ selectionModel()->clear();
+ return;
+ }
+ if (!topLeft.isValid() && !d->viewItems.isEmpty())
+ topLeft = d->viewItems.first().index;
+ if (!bottomRight.isValid() && !d->viewItems.isEmpty()) {
+ const int column = d->header->logicalIndex(d->header->count() - 1);
+ const QModelIndex index = d->viewItems.last().index;
+ bottomRight = index.sibling(index.row(), column);
+ }
+
+ if (!d->isIndexEnabled(topLeft) || !d->isIndexEnabled(bottomRight))
+ return;
+
+ d->select(topLeft, bottomRight, command);
+}
+
+/*!
+ Returns the rectangle from the viewport of the items in the given
+ \a selection.
+*/
+QRegion QTreeView::visualRegionForSelection(const QItemSelection &selection) const
+{
+ Q_D(const QTreeView);
+ if (selection.isEmpty())
+ return QRegion();
+
+ QRegion selectionRegion;
+ for (int i = 0; i < selection.count(); ++i) {
+ QItemSelectionRange range = selection.at(i);
+ if (!range.isValid())
+ continue;
+ QModelIndex parent = range.parent();
+ QModelIndex leftIndex = range.topLeft();
+ int columnCount = d->model->columnCount(parent);
+ while (leftIndex.isValid() && isIndexHidden(leftIndex)) {
+ if (leftIndex.column() + 1 < columnCount)
+ leftIndex = d->model->index(leftIndex.row(), leftIndex.column() + 1, parent);
+ else
+ leftIndex = QModelIndex();
+ }
+ if (!leftIndex.isValid())
+ continue;
+ const QRect leftRect = visualRect(leftIndex);
+ int top = leftRect.top();
+ QModelIndex rightIndex = range.bottomRight();
+ while (rightIndex.isValid() && isIndexHidden(rightIndex)) {
+ if (rightIndex.column() - 1 >= 0)
+ rightIndex = d->model->index(rightIndex.row(), rightIndex.column() - 1, parent);
+ else
+ rightIndex = QModelIndex();
+ }
+ if (!rightIndex.isValid())
+ continue;
+ const QRect rightRect = visualRect(rightIndex);
+ int bottom = rightRect.bottom();
+ if (top > bottom)
+ qSwap<int>(top, bottom);
+ int height = bottom - top + 1;
+ if (d->header->sectionsMoved()) {
+ for (int c = range.left(); c <= range.right(); ++c)
+ selectionRegion += QRegion(QRect(columnViewportPosition(c), top,
+ columnWidth(c), height));
+ } else {
+ QRect combined = leftRect|rightRect;
+ combined.setX(columnViewportPosition(isRightToLeft() ? range.right() : range.left()));
+ selectionRegion += combined;
+ }
+ }
+ return selectionRegion;
+}
+
+/*!
+ \reimp
+*/
+QModelIndexList QTreeView::selectedIndexes() const
+{
+ QModelIndexList viewSelected;
+ QModelIndexList modelSelected;
+ if (selectionModel())
+ modelSelected = selectionModel()->selectedIndexes();
+ for (int i = 0; i < modelSelected.count(); ++i) {
+ // check that neither the parents nor the index is hidden before we add
+ QModelIndex index = modelSelected.at(i);
+ while (index.isValid() && !isIndexHidden(index))
+ index = index.parent();
+ if (index.isValid())
+ continue;
+ viewSelected.append(modelSelected.at(i));
+ }
+ return viewSelected;
+}
+
+/*!
+ Scrolls the contents of the tree view by (\a dx, \a dy).
+*/
+void QTreeView::scrollContentsBy(int dx, int dy)
+{
+ Q_D(QTreeView);
+
+ d->delayedAutoScroll.stop(); // auto scroll was canceled by the user scrolling
+
+ dx = isRightToLeft() ? -dx : dx;
+ if (dx) {
+ if (horizontalScrollMode() == QAbstractItemView::ScrollPerItem) {
+ int oldOffset = d->header->offset();
+ if (horizontalScrollBar()->value() == horizontalScrollBar()->maximum())
+ d->header->setOffsetToLastSection();
+ else
+ d->header->setOffsetToSectionPosition(horizontalScrollBar()->value());
+ int newOffset = d->header->offset();
+ dx = isRightToLeft() ? newOffset - oldOffset : oldOffset - newOffset;
+ } else {
+ d->header->setOffset(horizontalScrollBar()->value());
+ }
+ }
+
+ const int itemHeight = d->defaultItemHeight <= 0 ? sizeHintForRow(0) : d->defaultItemHeight;
+ if (d->viewItems.isEmpty() || itemHeight == 0)
+ return;
+
+ // guestimate the number of items in the viewport
+ int viewCount = d->viewport->height() / itemHeight;
+ int maxDeltaY = qMin(d->viewItems.count(), viewCount);
+ // no need to do a lot of work if we are going to redraw the whole thing anyway
+ if (qAbs(dy) > qAbs(maxDeltaY) && d->editors.isEmpty()) {
+ verticalScrollBar()->update();
+ d->viewport->update();
+ return;
+ }
+
+ if (dy && verticalScrollMode() == QAbstractItemView::ScrollPerItem) {
+ int currentScrollbarValue = verticalScrollBar()->value();
+ int previousScrollbarValue = currentScrollbarValue + dy; // -(-dy)
+ int currentViewIndex = currentScrollbarValue; // the first visible item
+ int previousViewIndex = previousScrollbarValue;
+ const QVector<QTreeViewItem> viewItems = d->viewItems;
+ dy = 0;
+ if (previousViewIndex < currentViewIndex) { // scrolling down
+ for (int i = previousViewIndex; i < currentViewIndex; ++i) {
+ if (i < d->viewItems.count())
+ dy -= d->itemHeight(i);
+ }
+ } else if (previousViewIndex > currentViewIndex) { // scrolling up
+ for (int i = previousViewIndex - 1; i >= currentViewIndex; --i) {
+ if (i < d->viewItems.count())
+ dy += d->itemHeight(i);
+ }
+ }
+ }
+
+ d->scrollContentsBy(dx, dy);
+}
+
+/*!
+ This slot is called whenever a column has been moved.
+*/
+void QTreeView::columnMoved()
+{
+ Q_D(QTreeView);
+ updateEditorGeometries();
+ d->viewport->update();
+}
+
+/*!
+ \internal
+*/
+void QTreeView::reexpand()
+{
+ // do nothing
+}
+
+/*!
+ \internal
+*/
+static bool treeViewItemLessThan(const QTreeViewItem &left,
+ const QTreeViewItem &right)
+{
+ if (left.level != right.level) {
+ Q_ASSERT(left.level > right.level);
+ QModelIndex leftParent = left.index.parent();
+ QModelIndex rightParent = right.index.parent();
+ // computer parent, don't get
+ while (leftParent.isValid() && leftParent.parent() != rightParent)
+ leftParent = leftParent.parent();
+ return (leftParent.row() < right.index.row());
+ }
+ return (left.index.row() < right.index.row());
+}
+
+/*!
+ Informs the view that the rows from the \a start row to the \a end row
+ inclusive have been inserted into the \a parent model item.
+*/
+void QTreeView::rowsInserted(const QModelIndex &parent, int start, int end)
+{
+ Q_D(QTreeView);
+ // if we are going to do a complete relayout anyway, there is no need to update
+ if (d->delayedPendingLayout) {
+ QAbstractItemView::rowsInserted(parent, start, end);
+ return;
+ }
+
+ //don't add a hierarchy on a column != 0
+ if (parent.column() != 0 && parent.isValid()) {
+ QAbstractItemView::rowsInserted(parent, start, end);
+ return;
+ }
+
+ if (parent != d->root && !d->isIndexExpanded(parent) && d->model->rowCount(parent) > (end - start) + 1) {
+ QAbstractItemView::rowsInserted(parent, start, end);
+ return;
+ }
+
+ const int parentItem = d->viewIndex(parent);
+ if (((parentItem != -1) && d->viewItems.at(parentItem).expanded && updatesEnabled())
+ || (parent == d->root)) {
+ const uint childLevel = (parentItem == -1)
+ ? uint(0) : d->viewItems.at(parentItem).level + 1;
+ const int firstChildItem = parentItem + 1;
+ const int lastChildItem = firstChildItem + ((parentItem == -1)
+ ? d->viewItems.count()
+ : d->viewItems.at(parentItem).total) - 1;
+
+ int firstColumn = 0;
+ while (isColumnHidden(firstColumn) && firstColumn < header()->count() - 1)
+ ++firstColumn;
+
+ const int delta = end - start + 1;
+ QVector<QTreeViewItem> insertedItems(delta);
+ for (int i = 0; i < delta; ++i) {
+ insertedItems[i].index = d->model->index(i + start, firstColumn, parent);
+ insertedItems[i].level = childLevel;
+ }
+ if (d->viewItems.isEmpty())
+ d->defaultItemHeight = indexRowSizeHint(insertedItems[0].index);
+
+ int insertPos;
+ if (lastChildItem < firstChildItem) { // no children
+ insertPos = firstChildItem;
+ } else {
+ // do a binary search to figure out where to insert
+ QVector<QTreeViewItem>::iterator it;
+ it = qLowerBound(d->viewItems.begin() + firstChildItem,
+ d->viewItems.begin() + lastChildItem + 1,
+ insertedItems.at(0), treeViewItemLessThan);
+ insertPos = it - d->viewItems.begin();
+
+ // update stale model indexes of siblings
+ for (int item = insertPos; item <= lastChildItem; ) {
+ Q_ASSERT(d->viewItems.at(item).level == childLevel);
+ const QModelIndex modelIndex = d->viewItems.at(item).index;
+ //Q_ASSERT(modelIndex.parent() == parent);
+ d->viewItems[item].index = d->model->index(
+ modelIndex.row() + delta, modelIndex.column(), parent);
+
+ if (!d->viewItems[item].index.isValid()) {
+ // Something really bad is happening, a bad model is
+ // often the cause. We can't optimize in this case :(
+ qWarning() << "QTreeView::rowsInserted internal representation of the model has been corrupted, resetting.";
+ doItemsLayout();
+ return;
+ }
+
+ item += d->viewItems.at(item).total + 1;
+ }
+ }
+
+ d->viewItems.insert(insertPos, delta, insertedItems.at(0));
+ if (delta > 1) {
+ qCopy(insertedItems.begin() + 1, insertedItems.end(),
+ d->viewItems.begin() + insertPos + 1);
+ }
+
+ d->updateChildCount(parentItem, delta);
+ updateGeometries();
+ viewport()->update();
+ } else if ((parentItem != -1) && d->viewItems.at(parentItem).expanded) {
+ d->doDelayedItemsLayout();
+ } else if (parentItem != -1 && (d->model->rowCount(parent) == end - start + 1)) {
+ // the parent just went from 0 children to having some update to re-paint the decoration
+ viewport()->update();
+ }
+ QAbstractItemView::rowsInserted(parent, start, end);
+}
+
+/*!
+ Informs the view that the rows from the \a start row to the \a end row
+ inclusive are about to removed from the given \a parent model item.
+*/
+void QTreeView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
+{
+ Q_D(QTreeView);
+ d->rowsRemoved(parent, start, end, false);
+ QAbstractItemView::rowsAboutToBeRemoved(parent, start, end);
+}
+
+/*!
+ \since 4.1
+
+ Informs the view that the rows from the \a start row to the \a end row
+ inclusive have been removed from the given \a parent model item.
+*/
+void QTreeView::rowsRemoved(const QModelIndex &parent, int start, int end)
+{
+ Q_D(QTreeView);
+ d->rowsRemoved(parent, start, end, true);
+}
+
+/*!
+ Informs the tree view that the number of columns in the tree view has
+ changed from \a oldCount to \a newCount.
+*/
+void QTreeView::columnCountChanged(int oldCount, int newCount)
+{
+ Q_D(QTreeView);
+ if (oldCount == 0 && newCount > 0) {
+ //if the first column has just been added we need to relayout.
+ d->doDelayedItemsLayout();
+ }
+
+ if (isVisible())
+ updateGeometries();
+ viewport()->update();
+}
+
+/*!
+ Resizes the \a column given to the size of its contents.
+
+ \sa columnWidth(), setColumnWidth()
+*/
+void QTreeView::resizeColumnToContents(int column)
+{
+ Q_D(QTreeView);
+ d->executePostedLayout();
+ if (column < 0 || column >= d->header->count())
+ return;
+ int contents = sizeHintForColumn(column);
+ int header = d->header->isHidden() ? 0 : d->header->sectionSizeHint(column);
+ d->header->resizeSection(column, qMax(contents, header));
+}
+
+/*!
+ \obsolete
+ \overload
+
+ Sorts the model by the values in the given \a column.
+*/
+void QTreeView::sortByColumn(int column)
+{
+ Q_D(QTreeView);
+ sortByColumn(column, d->header->sortIndicatorOrder());
+}
+
+/*!
+ \since 4.2
+
+ Sets the model up for sorting by the values in the given \a column and \a order.
+
+ \a column may be -1, in which case no sort indicator will be shown
+ and the model will return to its natural, unsorted order. Note that not
+ all models support this and may even crash in this case.
+
+ \sa sortingEnabled
+*/
+void QTreeView::sortByColumn(int column, Qt::SortOrder order)
+{
+ Q_D(QTreeView);
+
+ //If sorting is enabled will emit a signal connected to _q_sortIndicatorChanged, which then actually sorts
+ d->header->setSortIndicator(column, order);
+ //If sorting is not enabled, force to sort now.
+ if (!d->sortingEnabled)
+ d->model->sort(column, order);
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::selectAll()
+{
+ Q_D(QTreeView);
+ if (!selectionModel())
+ return;
+ SelectionMode mode = d->selectionMode;
+ d->executePostedLayout(); //make sure we lay out the items
+ if (mode != SingleSelection && !d->viewItems.isEmpty())
+ d->select(d->viewItems.first().index, d->viewItems.last().index,
+ QItemSelectionModel::ClearAndSelect
+ |QItemSelectionModel::Rows);
+}
+
+/*!
+ \since 4.2
+ Expands all expandable items.
+
+ Warning: if the model contains a large number of items,
+ this function will take some time to execute.
+
+ \sa collapseAll() expand() collapse() setExpanded()
+*/
+void QTreeView::expandAll()
+{
+ Q_D(QTreeView);
+ d->viewItems.clear();
+ d->expandedIndexes.clear();
+ d->interruptDelayedItemsLayout();
+ d->layout(-1);
+ for (int i = 0; i < d->viewItems.count(); ++i) {
+ if (d->viewItems[i].expanded)
+ continue;
+ d->viewItems[i].expanded = true;
+ d->layout(i);
+ QModelIndex idx = d->viewItems.at(i).index;
+ d->expandedIndexes.insert(idx.sibling(idx.row(), 0));
+ }
+ updateGeometries();
+ d->viewport->update();
+}
+
+/*!
+ \since 4.2
+
+ Collapses all expanded items.
+
+ \sa expandAll() expand() collapse() setExpanded()
+*/
+void QTreeView::collapseAll()
+{
+ Q_D(QTreeView);
+ d->expandedIndexes.clear();
+ doItemsLayout();
+}
+
+/*!
+ \since 4.3
+ Expands all expandable items to the given \a depth.
+
+ \sa expandAll() collapseAll() expand() collapse() setExpanded()
+*/
+void QTreeView::expandToDepth(int depth)
+{
+ Q_D(QTreeView);
+ d->viewItems.clear();
+ d->expandedIndexes.clear();
+ d->interruptDelayedItemsLayout();
+ d->layout(-1);
+ for (int i = 0; i < d->viewItems.count(); ++i) {
+ if (d->viewItems.at(i).level <= (uint)depth) {
+ d->viewItems[i].expanded = true;
+ d->layout(i);
+ d->storeExpanded(d->viewItems.at(i).index);
+ }
+ }
+ updateGeometries();
+ d->viewport->update();
+}
+
+/*!
+ This function is called whenever \a{column}'s size is changed in
+ the header. \a oldSize and \a newSize give the previous size and
+ the new size in pixels.
+
+ \sa setColumnWidth()
+*/
+void QTreeView::columnResized(int column, int /* oldSize */, int /* newSize */)
+{
+ Q_D(QTreeView);
+ d->columnsToUpdate.append(column);
+ if (d->columnResizeTimerID == 0)
+ d->columnResizeTimerID = startTimer(0);
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::updateGeometries()
+{
+ Q_D(QTreeView);
+ if (d->header) {
+ if (d->geometryRecursionBlock)
+ return;
+ d->geometryRecursionBlock = true;
+ QSize hint = d->header->isHidden() ? QSize(0, 0) : d->header->sizeHint();
+ setViewportMargins(0, hint.height(), 0, 0);
+ QRect vg = d->viewport->geometry();
+ QRect geometryRect(vg.left(), vg.top() - hint.height(), vg.width(), hint.height());
+ d->header->setGeometry(geometryRect);
+ //d->header->setOffset(horizontalScrollBar()->value()); // ### bug ???
+ QMetaObject::invokeMethod(d->header, "updateGeometries");
+ d->updateScrollBars();
+ d->geometryRecursionBlock = false;
+ }
+ QAbstractItemView::updateGeometries();
+}
+
+/*!
+ Returns the size hint for the \a column's width or -1 if there is no
+ model.
+
+ If you need to set the width of a given column to a fixed value, call
+ QHeaderView::resizeSection() on the view's header.
+
+ If you reimplement this function in a subclass, note that the value you
+ return is only used when resizeColumnToContents() is called. In that case,
+ if a larger column width is required by either the view's header or
+ the item delegate, that width will be used instead.
+
+ \sa QWidget::sizeHint, header()
+*/
+int QTreeView::sizeHintForColumn(int column) const
+{
+ Q_D(const QTreeView);
+ d->executePostedLayout();
+ if (d->viewItems.isEmpty())
+ return -1;
+ int w = 0;
+ QStyleOptionViewItemV4 option = d->viewOptionsV4();
+ const QVector<QTreeViewItem> viewItems = d->viewItems;
+
+ int start = 0;
+ int end = viewItems.count();
+ if(end > 1000) { //if we have too many item this function would be too slow.
+ //we get a good approximation by only iterate over 1000 items.
+ start = qMax(0, d->firstVisibleItem() - 100);
+ end = qMin(end, start + 900);
+ }
+
+ for (int i = start; i < end; ++i) {
+ if (viewItems.at(i).spanning)
+ continue; // we have no good size hint
+ QModelIndex index = viewItems.at(i).index;
+ index = index.sibling(index.row(), column);
+ QWidget *editor = d->editorForIndex(index).editor;
+ if (editor && d->persistent.contains(editor)) {
+ w = qMax(w, editor->sizeHint().width());
+ int min = editor->minimumSize().width();
+ int max = editor->maximumSize().width();
+ w = qBound(min, w, max);
+ }
+ int hint = d->delegateForIndex(index)->sizeHint(option, index).width();
+ w = qMax(w, hint + (column == 0 ? d->indentationForItem(i) : 0));
+ }
+ return w;
+}
+
+/*!
+ Returns the size hint for the row indicated by \a index.
+
+ \sa sizeHintForColumn(), uniformRowHeights()
+*/
+int QTreeView::indexRowSizeHint(const QModelIndex &index) const
+{
+ Q_D(const QTreeView);
+ if (!d->isIndexValid(index) || !d->itemDelegate)
+ return 0;
+
+ int start = -1;
+ int end = -1;
+ int count = d->header->count();
+ bool emptyHeader = (count == 0);
+ QModelIndex parent = index.parent();
+
+ if (count && isVisible()) {
+ // If the sections have moved, we end up checking too many or too few
+ start = d->header->visualIndexAt(0);
+ } else {
+ // If the header has not been laid out yet, we use the model directly
+ count = d->model->columnCount(parent);
+ }
+
+ if (isRightToLeft()) {
+ start = (start == -1 ? count - 1 : start);
+ end = (end == -1 ? 0 : end);
+ } else {
+ start = (start == -1 ? 0 : start);
+ end = (end == -1 ? count - 1 : end);
+ }
+
+ int tmp = start;
+ start = qMin(start, end);
+ end = qMax(tmp, end);
+
+ int height = -1;
+ QStyleOptionViewItemV4 option = d->viewOptionsV4();
+ // ### If we want word wrapping in the items,
+ // ### we need to go through all the columns
+ // ### and set the width of the column
+
+ // Hack to speed up the function
+ option.rect.setWidth(-1);
+
+ for (int column = start; column <= end; ++column) {
+ int logicalColumn = emptyHeader ? column : d->header->logicalIndex(column);
+ if (d->header->isSectionHidden(logicalColumn))
+ continue;
+ QModelIndex idx = d->model->index(index.row(), logicalColumn, parent);
+ if (idx.isValid()) {
+ QWidget *editor = d->editorForIndex(idx).editor;
+ if (editor && d->persistent.contains(editor)) {
+ height = qMax(height, editor->sizeHint().height());
+ int min = editor->minimumSize().height();
+ int max = editor->maximumSize().height();
+ height = qBound(min, height, max);
+ }
+ int hint = d->delegateForIndex(idx)->sizeHint(option, idx).height();
+ height = qMax(height, hint);
+ }
+ }
+
+ return height;
+}
+
+/*!
+ \since 4.3
+ Returns the height of the row indicated by the given \a index.
+ \sa indexRowSizeHint()
+*/
+int QTreeView::rowHeight(const QModelIndex &index) const
+{
+ Q_D(const QTreeView);
+ d->executePostedLayout();
+ int i = d->viewIndex(index);
+ if (i == -1)
+ return 0;
+ return d->itemHeight(i);
+}
+
+/*!
+ \reimp
+*/
+void QTreeView::horizontalScrollbarAction(int action)
+{
+ QAbstractItemView::horizontalScrollbarAction(action);
+}
+
+/*!
+ \reimp
+*/
+bool QTreeView::isIndexHidden(const QModelIndex &index) const
+{
+ return (isColumnHidden(index.column()) || isRowHidden(index.row(), index.parent()));
+}
+
+/*
+ private implementation
+*/
+void QTreeViewPrivate::initialize()
+{
+ Q_Q(QTreeView);
+ updateStyledFrameWidths();
+ q->setSelectionBehavior(QAbstractItemView::SelectRows);
+ q->setSelectionMode(QAbstractItemView::SingleSelection);
+ q->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
+ q->setAttribute(Qt::WA_MacShowFocusRect);
+
+ QHeaderView *header = new QHeaderView(Qt::Horizontal, q);
+ header->setMovable(true);
+ header->setStretchLastSection(true);
+ header->setDefaultAlignment(Qt::AlignLeft|Qt::AlignVCenter);
+ q->setHeader(header);
+
+ // animation
+ QObject::connect(&timeline, SIGNAL(frameChanged(int)), q, SLOT(_q_animate()));
+ QObject::connect(&timeline, SIGNAL(finished()), q, SLOT(_q_endAnimatedOperation()), Qt::QueuedConnection);
+}
+
+void QTreeViewPrivate::expand(int item, bool emitSignal)
+{
+ Q_Q(QTreeView);
+
+ if (item == -1 || viewItems.at(item).expanded)
+ return;
+
+ if (emitSignal && animationsEnabled)
+ prepareAnimatedOperation(item, AnimatedOperation::Expand);
+
+ QAbstractItemView::State oldState = q->state();
+ q->setState(QAbstractItemView::ExpandingState);
+ const QModelIndex index = viewItems.at(item).index;
+ storeExpanded(index);
+ viewItems[item].expanded = true;
+ layout(item);
+ q->setState(oldState);
+
+ if (emitSignal) {
+ emit q->expanded(index);
+ if (animationsEnabled)
+ beginAnimatedOperation();
+ }
+ if (model->canFetchMore(index))
+ model->fetchMore(index);
+}
+
+void QTreeViewPrivate::collapse(int item, bool emitSignal)
+{
+ Q_Q(QTreeView);
+
+ if (item == -1 || expandedIndexes.isEmpty())
+ return;
+
+ //if the current item is now invisible, the autoscroll will expand the tree to see it, so disable the autoscroll
+ delayedAutoScroll.stop();
+
+ int total = viewItems.at(item).total;
+ const QModelIndex &modelIndex = viewItems.at(item).index;
+ if (!isPersistent(modelIndex))
+ return; // if the index is not persistent, no chances it is expanded
+ QSet<QPersistentModelIndex>::iterator it = expandedIndexes.find(modelIndex);
+ if (it == expandedIndexes.end() || viewItems.at(item).expanded == false)
+ return; // nothing to do
+
+ if (emitSignal && animationsEnabled)
+ prepareAnimatedOperation(item, AnimatedOperation::Collapse);
+
+ QAbstractItemView::State oldState = q->state();
+ q->setState(QAbstractItemView::CollapsingState);
+ expandedIndexes.erase(it);
+ viewItems[item].expanded = false;
+ int index = item;
+ QModelIndex parent = modelIndex;
+ while (parent.isValid() && parent != root) {
+ Q_ASSERT(index > -1);
+ viewItems[index].total -= total;
+ parent = parent.parent();
+ index = viewIndex(parent);
+ }
+ viewItems.remove(item + 1, total); // collapse
+ q->setState(oldState);
+
+ if (emitSignal) {
+ emit q->collapsed(modelIndex);
+ if (animationsEnabled)
+ beginAnimatedOperation();
+ }
+}
+
+void QTreeViewPrivate::prepareAnimatedOperation(int item, AnimatedOperation::Type type)
+{
+ animatedOperation.item = item;
+ animatedOperation.type = type;
+
+ int top = coordinateForItem(item) + itemHeight(item);
+ QRect rect = viewport->rect();
+ rect.setTop(top);
+ if (type == AnimatedOperation::Collapse) {
+ const int limit = rect.height() * 2;
+ int h = 0;
+ int c = item + viewItems.at(item).total + 1;
+ for (int i = item + 1; i < c && h < limit; ++i)
+ h += itemHeight(i);
+ rect.setHeight(h);
+ animatedOperation.duration = h;
+ }
+ animatedOperation.top = top;
+ animatedOperation.before = renderTreeToPixmapForAnimation(rect);
+}
+
+void QTreeViewPrivate::beginAnimatedOperation()
+{
+ Q_Q(QTreeView);
+
+ QRect rect = viewport->rect();
+ rect.setTop(animatedOperation.top);
+ if (animatedOperation.type == AnimatedOperation::Expand) {
+ const int limit = rect.height() * 2;
+ int h = 0;
+ int c = animatedOperation.item + viewItems.at(animatedOperation.item).total + 1;
+ for (int i = animatedOperation.item + 1; i < c && h < limit; ++i)
+ h += itemHeight(i);
+ rect.setHeight(h);
+ animatedOperation.duration = h;
+ }
+
+ animatedOperation.after = renderTreeToPixmapForAnimation(rect);
+
+ q->setState(QAbstractItemView::AnimatingState);
+
+ timeline.stop();
+ timeline.setDuration(250);
+ timeline.setFrameRange(animatedOperation.top, animatedOperation.top + animatedOperation.duration);
+ timeline.start();
+}
+
+void QTreeViewPrivate::_q_endAnimatedOperation()
+{
+ Q_Q(QTreeView);
+ animatedOperation.before = QPixmap();
+ animatedOperation.after = QPixmap();
+ q->setState(QAbstractItemView::NoState);
+ q->updateGeometries();
+ viewport->update();
+}
+
+void QTreeViewPrivate::_q_animate()
+{
+ QRect rect = viewport->rect();
+ rect.moveTop(animatedOperation.top);
+ viewport->repaint(rect);
+}
+
+void QTreeViewPrivate::drawAnimatedOperation(QPainter *painter) const
+{
+ int start = timeline.startFrame();
+ int end = timeline.endFrame();
+ bool collapsing = animatedOperation.type == AnimatedOperation::Collapse;
+ int current = collapsing ? end - timeline.currentFrame() + start : timeline.currentFrame();
+ const QPixmap top = collapsing ? animatedOperation.before : animatedOperation.after;
+ painter->drawPixmap(0, start, top, 0, end - current - 1, top.width(), top.height());
+ const QPixmap bottom = collapsing ? animatedOperation.after : animatedOperation.before;
+ painter->drawPixmap(0, current, bottom);
+}
+
+QPixmap QTreeViewPrivate::renderTreeToPixmapForAnimation(const QRect &rect) const
+{
+ Q_Q(const QTreeView);
+ QPixmap pixmap(rect.size());
+ pixmap.fill(Qt::transparent); //the base might not be opaque, and we don't want uninitialized pixels.
+ QPainter painter(&pixmap);
+ painter.fillRect(QRect(QPoint(0,0), rect.size()), q->palette().base());
+ painter.translate(0, -rect.top());
+ q->drawTree(&painter, QRegion(rect));
+ painter.end();
+
+ //and now let's render the editors the editors
+ QStyleOptionViewItemV4 option = viewOptionsV4();
+ for (QList<QEditorInfo>::const_iterator it = editors.constBegin(); it != editors.constEnd(); ++it) {
+ QWidget *editor = it->editor;
+ QModelIndex index = it->index;
+ option.rect = q->visualRect(index);
+ if (option.rect.isValid()) {
+
+ if (QAbstractItemDelegate *delegate = delegateForIndex(index))
+ delegate->updateEditorGeometry(editor, option, index);
+
+ const QPoint pos = editor->pos();
+ if (rect.contains(pos)) {
+ editor->render(&pixmap, pos - rect.topLeft());
+ //the animation uses pixmap to display the treeview's content
+ //the editor is rendered on this pixmap and thus can (should) be hidden
+ editor->hide();
+ }
+ }
+ }
+
+
+ return pixmap;
+}
+
+void QTreeViewPrivate::_q_currentChanged(const QModelIndex &current, const QModelIndex &previous)
+{
+ Q_Q(QTreeView);
+ if (previous.isValid()) {
+ QRect previousRect = q->visualRect(previous);
+ if (allColumnsShowFocus) {
+ previousRect.setX(0);
+ previousRect.setWidth(viewport->width());
+ }
+ viewport->update(previousRect);
+ }
+ if (current.isValid()) {
+ QRect currentRect = q->visualRect(current);
+ if (allColumnsShowFocus) {
+ currentRect.setX(0);
+ currentRect.setWidth(viewport->width());
+ }
+ viewport->update(currentRect);
+ }
+}
+
+void QTreeViewPrivate::_q_modelAboutToBeReset()
+{
+ viewItems.clear();
+}
+
+void QTreeViewPrivate::_q_columnsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
+{
+ Q_UNUSED(parent);
+ if (start <= 0 && 0 <= end)
+ viewItems.clear();
+}
+
+void QTreeViewPrivate::_q_columnsRemoved(const QModelIndex &parent, int start, int end)
+{
+ Q_UNUSED(parent);
+ if (start <= 0 && 0 <= end)
+ doDelayedItemsLayout();
+}
+
+void QTreeViewPrivate::layout(int i)
+{
+ Q_Q(QTreeView);
+ QModelIndex current;
+ QModelIndex parent = (i < 0) ? (QModelIndex)root : modelIndex(i);
+ // modelIndex() will return an index that don't have a parent if column 0 is hidden,
+ // so we must make sure that parent points to the actual parent that has children.
+ if (parent != root)
+ parent = model->index(parent.row(), 0, parent.parent());
+
+ if (i>=0 && !parent.isValid()) {
+ //modelIndex() should never return something invalid for the real items.
+ //This can happen if columncount has been set to 0.
+ //To avoid infinite loop we stop here.
+ return;
+ }
+
+ int count = 0;
+ if (model->hasChildren(parent)) {
+ if (model->canFetchMore(parent))
+ model->fetchMore(parent);
+ count = model->rowCount(parent);
+ }
+
+ bool expanding = true;
+ if (i == -1) {
+ if (uniformRowHeights) {
+ QModelIndex index = model->index(0, 0, parent);
+ defaultItemHeight = q->indexRowSizeHint(index);
+ }
+ viewItems.resize(count);
+ } else if (viewItems[i].total != (uint)count) {
+ viewItems.insert(i + 1, count, QTreeViewItem()); // expand
+ } else {
+ expanding = false;
+ }
+
+ int first = i + 1;
+ int level = (i >= 0 ? viewItems.at(i).level + 1 : 0);
+ int hidden = 0;
+ int last = 0;
+ int children = 0;
+
+ int firstColumn = 0;
+ while (header->isSectionHidden(firstColumn) && firstColumn < header->count())
+ ++firstColumn;
+
+ for (int j = first; j < first + count; ++j) {
+ current = model->index(j - first, firstColumn, parent);
+ if (isRowHidden(current.sibling(current.row(), 0))) {
+ ++hidden;
+ last = j - hidden + children;
+ } else {
+ last = j - hidden + children;
+ viewItems[last].index = current;
+ viewItems[last].level = level;
+ viewItems[last].height = 0;
+ viewItems[last].spanning = q->isFirstColumnSpanned(current.row(), parent);
+ viewItems[last].expanded = false;
+ viewItems[last].total = 0;
+ if (isIndexExpanded(current)) {
+ viewItems[last].expanded = true;
+ layout(last);
+ children += viewItems[last].total;
+ last = j - hidden + children;
+ }
+ }
+ }
+
+ // remove hidden items
+ if (hidden > 0)
+ viewItems.remove(last + 1, hidden); // collapse
+
+ if (!expanding)
+ return; // nothing changed
+
+ while (parent != root) {
+ Q_ASSERT(i > -1);
+ viewItems[i].total += count - hidden;
+ parent = parent.parent();
+ i = viewIndex(parent);
+ }
+}
+
+int QTreeViewPrivate::pageUp(int i) const
+{
+ int index = itemAtCoordinate(coordinateForItem(i) - viewport->height());
+ return index == -1 ? 0 : index;
+}
+
+int QTreeViewPrivate::pageDown(int i) const
+{
+ int index = itemAtCoordinate(coordinateForItem(i) + viewport->height());
+ return index == -1 ? viewItems.count() - 1 : index;
+}
+
+int QTreeViewPrivate::indentationForItem(int item) const
+{
+ if (item < 0 || item >= viewItems.count())
+ return 0;
+ int level = viewItems.at(item).level;
+ if (rootDecoration)
+ ++level;
+ return level * indent;
+}
+
+int QTreeViewPrivate::itemHeight(int item) const
+{
+ if (uniformRowHeights)
+ return defaultItemHeight;
+ if (viewItems.isEmpty())
+ return 0;
+ const QModelIndex &index = viewItems.at(item).index;
+ int height = viewItems.at(item).height;
+ if (height <= 0 && index.isValid()) {
+ height = q_func()->indexRowSizeHint(index);
+ viewItems[item].height = height;
+ }
+ if (!index.isValid() || height < 0)
+ return 0;
+ return height;
+}
+
+
+/*!
+ \internal
+ Returns the viewport y coordinate for \a item.
+*/
+int QTreeViewPrivate::coordinateForItem(int item) const
+{
+ Q_Q(const QTreeView);
+ if (verticalScrollMode == QAbstractItemView::ScrollPerPixel) {
+ if (uniformRowHeights)
+ return (item * defaultItemHeight) - q->verticalScrollBar()->value();
+ // ### optimize (spans or caching)
+ int y = 0;
+ for (int i = 0; i < viewItems.count(); ++i) {
+ if (i == item)
+ return y - q->verticalScrollBar()->value();
+ y += itemHeight(i);
+ }
+ } else { // ScrollPerItem
+ int topViewItemIndex = q->verticalScrollBar()->value();
+ if (uniformRowHeights)
+ return defaultItemHeight * (item - topViewItemIndex);
+ if (item >= topViewItemIndex) {
+ // search in the visible area first and continue down
+ // ### slow if the item is not visible
+ int viewItemCoordinate = 0;
+ int viewItemIndex = topViewItemIndex;
+ while (viewItemIndex < viewItems.count()) {
+ if (viewItemIndex == item)
+ return viewItemCoordinate;
+ viewItemCoordinate += itemHeight(viewItemIndex);
+ ++viewItemIndex;
+ }
+ // below the last item in the view
+ Q_ASSERT(false);
+ return viewItemCoordinate;
+ } else {
+ // search the area above the viewport (used for editor widgets)
+ int viewItemCoordinate = 0;
+ for (int viewItemIndex = topViewItemIndex; viewItemIndex > 0; --viewItemIndex) {
+ if (viewItemIndex == item)
+ return viewItemCoordinate;
+ viewItemCoordinate -= itemHeight(viewItemIndex - 1);
+ }
+ return viewItemCoordinate;
+ }
+ }
+ return 0;
+}
+
+/*!
+ \internal
+ Returns the index of the view item at the
+ given viewport \a coordinate.
+
+ \sa modelIndex()
+*/
+int QTreeViewPrivate::itemAtCoordinate(int coordinate) const
+{
+ Q_Q(const QTreeView);
+ const int itemCount = viewItems.count();
+ if (itemCount == 0)
+ return -1;
+ if (uniformRowHeights && defaultItemHeight <= 0)
+ return -1;
+ if (verticalScrollMode == QAbstractItemView::ScrollPerPixel) {
+ if (uniformRowHeights) {
+ const int viewItemIndex = (coordinate + q->verticalScrollBar()->value()) / defaultItemHeight;
+ return ((viewItemIndex >= itemCount || viewItemIndex < 0) ? -1 : viewItemIndex);
+ }
+ // ### optimize
+ int viewItemCoordinate = 0;
+ const int contentsCoordinate = coordinate + q->verticalScrollBar()->value();
+ for (int viewItemIndex = 0; viewItemIndex < viewItems.count(); ++viewItemIndex) {
+ viewItemCoordinate += itemHeight(viewItemIndex);
+ if (viewItemCoordinate >= contentsCoordinate)
+ return (viewItemIndex >= itemCount ? -1 : viewItemIndex);
+ }
+ } else { // ScrollPerItem
+ int topViewItemIndex = q->verticalScrollBar()->value();
+ if (uniformRowHeights) {
+ if (coordinate < 0)
+ coordinate -= defaultItemHeight - 1;
+ const int viewItemIndex = topViewItemIndex + (coordinate / defaultItemHeight);
+ return ((viewItemIndex >= itemCount || viewItemIndex < 0) ? -1 : viewItemIndex);
+ }
+ if (coordinate >= 0) {
+ // the coordinate is in or below the viewport
+ int viewItemCoordinate = 0;
+ for (int viewItemIndex = topViewItemIndex; viewItemIndex < viewItems.count(); ++viewItemIndex) {
+ viewItemCoordinate += itemHeight(viewItemIndex);
+ if (viewItemCoordinate > coordinate)
+ return (viewItemIndex >= itemCount ? -1 : viewItemIndex);
+ }
+ } else {
+ // the coordinate is above the viewport
+ int viewItemCoordinate = 0;
+ for (int viewItemIndex = topViewItemIndex; viewItemIndex >= 0; --viewItemIndex) {
+ if (viewItemCoordinate <= coordinate)
+ return (viewItemIndex >= itemCount ? -1 : viewItemIndex);
+ viewItemCoordinate -= itemHeight(viewItemIndex);
+ }
+ }
+ }
+ return -1;
+}
+
+int QTreeViewPrivate::viewIndex(const QModelIndex &_index) const
+{
+ Q_Q(const QTreeView);
+ if (!_index.isValid() || viewItems.isEmpty())
+ return -1;
+
+ const int totalCount = viewItems.count();
+ int firstColumn = 0;
+ while (q->isColumnHidden(firstColumn) && firstColumn < header->count())
+ ++firstColumn;
+ const QModelIndex index = _index.sibling(_index.row(), firstColumn);
+
+
+ // A quick check near the last item to see if we are just incrementing
+ const int start = lastViewedItem > 2 ? lastViewedItem - 2 : 0;
+ const int end = lastViewedItem < totalCount - 2 ? lastViewedItem + 2 : totalCount;
+ int row = index.row();
+ for (int i = start; i < end; ++i) {
+ const QModelIndex &idx = viewItems.at(i).index;
+ if (idx.row() == row) {
+ if (idx.internalId() == index.internalId()) {
+ lastViewedItem = i;
+ return i;
+ }
+ }
+ }
+
+ // NOTE: this function is slow if the item is outside the visible area
+ // search in visible items first and below
+ int t = firstVisibleItem();
+ t = t > 100 ? t - 100 : 0; // start 100 items above the visible area
+
+ for (int i = t; i < totalCount; ++i) {
+ const QModelIndex &idx = viewItems.at(i).index;
+ if (idx.row() == row) {
+ if (idx.internalId() == index.internalId()) {
+ lastViewedItem = i;
+ return i;
+ }
+ }
+ }
+ // search from top to first visible
+ for (int j = 0; j < t; ++j) {
+ const QModelIndex &idx = viewItems.at(j).index;
+ if (idx.row() == row) {
+ if (idx.internalId() == index.internalId()) {
+ lastViewedItem = j;
+ return j;
+ }
+ }
+ }
+ // nothing found
+ return -1;
+}
+
+QModelIndex QTreeViewPrivate::modelIndex(int i, int column) const
+{
+ if (i < 0 || i >= viewItems.count())
+ return QModelIndex();
+
+ QModelIndex ret = viewItems.at(i).index;
+ if (column)
+ ret = ret.sibling(ret.row(), column);
+ return ret;
+}
+
+int QTreeViewPrivate::firstVisibleItem(int *offset) const
+{
+ Q_Q(const QTreeView);
+ const int value = q->verticalScrollBar()->value();
+ if (verticalScrollMode == QAbstractItemView::ScrollPerItem) {
+ if (offset)
+ *offset = 0;
+ return (value < 0 || value >= viewItems.count()) ? -1 : value;
+ }
+ // ScrollMode == ScrollPerPixel
+ if (uniformRowHeights) {
+ if (!defaultItemHeight)
+ return -1;
+
+ if (offset)
+ *offset = -(value % defaultItemHeight);
+ return value / defaultItemHeight;
+ }
+ int y = 0; // ### optimize (use spans ?)
+ for (int i = 0; i < viewItems.count(); ++i) {
+ y += itemHeight(i); // the height value is cached
+ if (y > value) {
+ if (offset)
+ *offset = y - value - itemHeight(i);
+ return i;
+ }
+ }
+ return -1;
+}
+
+int QTreeViewPrivate::columnAt(int x) const
+{
+ return header->logicalIndexAt(x);
+}
+
+void QTreeViewPrivate::relayout(const QModelIndex &parent)
+{
+ Q_Q(QTreeView);
+ // do a local relayout of the items
+ if (parent.isValid()) {
+ int parentViewIndex = viewIndex(parent);
+ if (parentViewIndex > -1 && viewItems.at(parentViewIndex).expanded) {
+ collapse(parentViewIndex, false); // remove the current layout
+ expand(parentViewIndex, false); // do the relayout
+ q->updateGeometries();
+ viewport->update();
+ }
+ } else {
+ viewItems.clear();
+ q->doItemsLayout();
+ }
+}
+
+
+void QTreeViewPrivate::updateScrollBars()
+{
+ Q_Q(QTreeView);
+ QSize viewportSize = viewport->size();
+ if (!viewportSize.isValid())
+ viewportSize = QSize(0, 0);
+
+ int itemsInViewport = 0;
+ if (uniformRowHeights) {
+ if (defaultItemHeight <= 0)
+ itemsInViewport = viewItems.count();
+ else
+ itemsInViewport = viewportSize.height() / defaultItemHeight;
+ } else {
+ const int itemsCount = viewItems.count();
+ const int viewportHeight = viewportSize.height();
+ for (int height = 0, item = itemsCount - 1; item >= 0; --item) {
+ height += itemHeight(item);
+ if (height > viewportHeight)
+ break;
+ ++itemsInViewport;
+ }
+ }
+ if (verticalScrollMode == QAbstractItemView::ScrollPerItem) {
+ if (!viewItems.isEmpty())
+ itemsInViewport = qMax(1, itemsInViewport);
+ q->verticalScrollBar()->setRange(0, viewItems.count() - itemsInViewport);
+ q->verticalScrollBar()->setPageStep(itemsInViewport);
+ q->verticalScrollBar()->setSingleStep(1);
+ } else { // scroll per pixel
+ int contentsHeight = 0;
+ if (uniformRowHeights) {
+ contentsHeight = defaultItemHeight * viewItems.count();
+ } else { // ### optimize (spans or caching)
+ for (int i = 0; i < viewItems.count(); ++i)
+ contentsHeight += itemHeight(i);
+ }
+ q->verticalScrollBar()->setRange(0, contentsHeight - viewportSize.height());
+ q->verticalScrollBar()->setPageStep(viewportSize.height());
+ q->verticalScrollBar()->setSingleStep(qMax(viewportSize.height() / (itemsInViewport + 1), 2));
+ }
+
+ const int columnCount = header->count();
+ const int viewportWidth = viewportSize.width();
+ int columnsInViewport = 0;
+ for (int width = 0, column = columnCount - 1; column >= 0; --column) {
+ int logical = header->logicalIndex(column);
+ width += header->sectionSize(logical);
+ if (width > viewportWidth)
+ break;
+ ++columnsInViewport;
+ }
+ if (columnCount > 0)
+ columnsInViewport = qMax(1, columnsInViewport);
+ if (horizontalScrollMode == QAbstractItemView::ScrollPerItem) {
+ q->horizontalScrollBar()->setRange(0, columnCount - columnsInViewport);
+ q->horizontalScrollBar()->setPageStep(columnsInViewport);
+ q->horizontalScrollBar()->setSingleStep(1);
+ } else { // scroll per pixel
+ const int horizontalLength = header->length();
+ const QSize maxSize = q->maximumViewportSize();
+ if (maxSize.width() >= horizontalLength && q->verticalScrollBar()->maximum() <= 0)
+ viewportSize = maxSize;
+ q->horizontalScrollBar()->setPageStep(viewportSize.width());
+ q->horizontalScrollBar()->setRange(0, qMax(horizontalLength - viewportSize.width(), 0));
+ q->horizontalScrollBar()->setSingleStep(qMax(viewportSize.width() / (columnsInViewport + 1), 2));
+ }
+}
+
+int QTreeViewPrivate::itemDecorationAt(const QPoint &pos) const
+{
+ int x = pos.x();
+ int column = header->logicalIndexAt(x);
+ if (column != 0)
+ return -1; // no logical index at x
+
+ int viewItemIndex = itemAtCoordinate(pos.y());
+ QRect returning = itemDecorationRect(modelIndex(viewItemIndex));
+ if (!returning.contains(pos))
+ return -1;
+
+ return viewItemIndex;
+}
+
+QRect QTreeViewPrivate::itemDecorationRect(const QModelIndex &index) const
+{
+ Q_Q(const QTreeView);
+ if (!rootDecoration && index.parent() == root)
+ return QRect(); // no decoration at root
+
+ int viewItemIndex = viewIndex(index);
+ if (viewItemIndex < 0 || !hasVisibleChildren(viewItems.at(viewItemIndex).index))
+ return QRect();
+
+ int itemIndentation = indentationForItem(viewItemIndex);
+ int position = header->sectionViewportPosition(0);
+ int size = header->sectionSize(0);
+
+ QRect rect;
+ if (q->isRightToLeft())
+ rect = QRect(position + size - itemIndentation, coordinateForItem(viewItemIndex),
+ indent, itemHeight(viewItemIndex));
+ else
+ rect = QRect(position + itemIndentation - indent, coordinateForItem(viewItemIndex),
+ indent, itemHeight(viewItemIndex));
+ QStyleOption opt;
+ opt.initFrom(q);
+ opt.rect = rect;
+ return q->style()->subElementRect(QStyle::SE_TreeViewDisclosureItem, &opt, q);
+}
+
+QList<QPair<int, int> > QTreeViewPrivate::columnRanges(const QModelIndex &topIndex,
+ const QModelIndex &bottomIndex) const
+{
+ const int topVisual = header->visualIndex(topIndex.column()),
+ bottomVisual = header->visualIndex(bottomIndex.column());
+
+ const int start = qMin(topVisual, bottomVisual);
+ const int end = qMax(topVisual, bottomVisual);
+
+ QList<int> logicalIndexes;
+
+ //we iterate over the visual indexes to get the logical indexes
+ for (int c = start; c <= end; c++) {
+ const int logical = header->logicalIndex(c);
+ if (!header->isSectionHidden(logical)) {
+ logicalIndexes << logical;
+ }
+ }
+ //let's sort the list
+ qSort(logicalIndexes.begin(), logicalIndexes.end());
+
+ QList<QPair<int, int> > ret;
+ QPair<int, int> current;
+ current.first = -2; // -1 is not enough because -1+1 = 0
+ current.second = -2;
+ foreach (int logicalColumn, logicalIndexes) {
+ if (current.second + 1 != logicalColumn) {
+ if (current.first != -2) {
+ //let's save the current one
+ ret += current;
+ }
+ //let's start a new one
+ current.first = current.second = logicalColumn;
+ } else {
+ current.second++;
+ }
+ }
+
+ //let's get the last range
+ if (current.first != -2) {
+ ret += current;
+ }
+
+ return ret;
+}
+
+void QTreeViewPrivate::select(const QModelIndex &topIndex, const QModelIndex &bottomIndex,
+ QItemSelectionModel::SelectionFlags command)
+{
+ Q_Q(QTreeView);
+ QItemSelection selection;
+ const int top = viewIndex(topIndex),
+ bottom = viewIndex(bottomIndex);
+
+ const QList< QPair<int, int> > colRanges = columnRanges(topIndex, bottomIndex);
+ QList< QPair<int, int> >::const_iterator it;
+ for (it = colRanges.begin(); it != colRanges.end(); ++it) {
+ const int left = (*it).first,
+ right = (*it).second;
+
+ QModelIndex previous;
+ QItemSelectionRange currentRange;
+ QStack<QItemSelectionRange> rangeStack;
+ for (int i = top; i <= bottom; ++i) {
+ QModelIndex index = modelIndex(i);
+ QModelIndex parent = index.parent();
+ QModelIndex previousParent = previous.parent();
+ if (previous.isValid() && parent == previousParent) {
+ // same parent
+ if (qAbs(previous.row() - index.row()) > 1) {
+ //a hole (hidden index inside a range) has been detected
+ if (currentRange.isValid()) {
+ selection.append(currentRange);
+ }
+ //let's start a new range
+ currentRange = QItemSelectionRange(index.sibling(index.row(), left), index.sibling(index.row(), right));
+ } else {
+ QModelIndex tl = model->index(currentRange.top(), currentRange.left(),
+ currentRange.parent());
+ currentRange = QItemSelectionRange(tl, index.sibling(index.row(), right));
+ }
+ } else if (previous.isValid() && parent == model->index(previous.row(), 0, previousParent)) {
+ // item is child of previous
+ rangeStack.push(currentRange);
+ currentRange = QItemSelectionRange(index.sibling(index.row(), left), index.sibling(index.row(), right));
+ } else {
+ if (currentRange.isValid())
+ selection.append(currentRange);
+ if (rangeStack.isEmpty()) {
+ currentRange = QItemSelectionRange(index.sibling(index.row(), left), index.sibling(index.row(), right));
+ } else {
+ currentRange = rangeStack.pop();
+ index = currentRange.bottomRight(); //let's resume the range
+ --i; //we process again the current item
+ }
+ }
+ previous = index;
+ }
+ if (currentRange.isValid())
+ selection.append(currentRange);
+ for (int i = 0; i < rangeStack.count(); ++i)
+ selection.append(rangeStack.at(i));
+ }
+ q->selectionModel()->select(selection, command);
+}
+
+QPair<int,int> QTreeViewPrivate::startAndEndColumns(const QRect &rect) const
+{
+ Q_Q(const QTreeView);
+ int start = header->visualIndexAt(rect.left());
+ int end = header->visualIndexAt(rect.right());
+ if (q->isRightToLeft()) {
+ start = (start == -1 ? header->count() - 1 : start);
+ end = (end == -1 ? 0 : end);
+ } else {
+ start = (start == -1 ? 0 : start);
+ end = (end == -1 ? header->count() - 1 : end);
+ }
+ return qMakePair<int,int>(qMin(start, end), qMax(start, end));
+}
+
+bool QTreeViewPrivate::hasVisibleChildren(const QModelIndex& parent) const
+{
+ Q_Q(const QTreeView);
+ if (model->hasChildren(parent)) {
+ if (hiddenIndexes.isEmpty())
+ return true;
+ if (q->isIndexHidden(parent))
+ return false;
+ int rowCount = model->rowCount(parent);
+ for (int i = 0; i < rowCount; ++i) {
+ if (!q->isRowHidden(i, parent))
+ return true;
+ }
+ if (rowCount == 0)
+ return true;
+ }
+ return false;
+}
+
+void QTreeViewPrivate::rowsRemoved(const QModelIndex &parent,
+ int start, int end, bool after)
+{
+ Q_Q(QTreeView);
+ // if we are going to do a complete relayout anyway, there is no need to update
+ if (delayedPendingLayout) {
+ _q_rowsRemoved(parent, start, end);
+ return;
+ }
+
+ const int parentItem = viewIndex(parent);
+ if ((parentItem != -1) || (parent == root)) {
+
+ const uint childLevel = (parentItem == -1)
+ ? uint(0) : viewItems.at(parentItem).level + 1;
+ Q_UNUSED(childLevel); // unused in release mode, used in assert below
+
+ const int firstChildItem = parentItem + 1;
+ int lastChildItem = firstChildItem + ((parentItem == -1)
+ ? viewItems.count()
+ : viewItems.at(parentItem).total) - 1;
+
+ const int delta = end - start + 1;
+
+ int removedCount = 0;
+ for (int item = firstChildItem; item <= lastChildItem; ) {
+ Q_ASSERT(viewItems.at(item).level == childLevel);
+ const QModelIndex modelIndex = viewItems.at(item).index;
+ //Q_ASSERT(modelIndex.parent() == parent);
+ const int count = viewItems.at(item).total + 1;
+ if (modelIndex.row() < start) {
+ // not affected by the removal
+ item += count;
+ } else if (modelIndex.row() <= end) {
+ // removed
+ viewItems.remove(item, count);
+ removedCount += count;
+ lastChildItem -= count;
+ } else {
+ if (after) {
+ // moved; update the model index
+ viewItems[item].index = model->index(
+ modelIndex.row() - delta, modelIndex.column(), parent);
+ }
+ item += count;
+ }
+ }
+
+ updateChildCount(parentItem, -removedCount);
+ if (after) {
+ q->updateGeometries();
+ viewport->update();
+ } else {
+ //we have removed items: we should at least update the scroll bar values.
+ // They are used to determine the item geometry.
+ updateScrollBars();
+ }
+ } else {
+ // If an ancestor of root is removed then relayout
+ QModelIndex idx = root;
+ while (idx.isValid()) {
+ idx = idx.parent();
+ if (idx == parent) {
+ doDelayedItemsLayout();
+ break;
+ }
+ }
+ }
+ _q_rowsRemoved(parent, start, end);
+
+ QSet<QPersistentModelIndex>::iterator it = expandedIndexes.begin();
+ while (it != expandedIndexes.constEnd()) {
+ if (!it->isValid())
+ it = expandedIndexes.erase(it);
+ else
+ ++it;
+ }
+ it = hiddenIndexes.begin();
+ while (it != hiddenIndexes.constEnd()) {
+ if (!it->isValid())
+ it = hiddenIndexes.erase(it);
+ else
+ ++it;
+ }
+}
+
+void QTreeViewPrivate::updateChildCount(const int parentItem, const int delta)
+{
+ if ((parentItem != -1) && delta) {
+ int level = viewItems.at(parentItem).level;
+ int item = parentItem;
+ do {
+ Q_ASSERT(item >= 0);
+ for ( ; int(viewItems.at(item).level) != level; --item) ;
+ viewItems[item].total += delta;
+ --level;
+ } while (level >= 0);
+ }
+}
+
+
+void QTreeViewPrivate::_q_sortIndicatorChanged(int column, Qt::SortOrder order)
+{
+ model->sort(column, order);
+}
+
+/*!
+ \reimp
+ */
+void QTreeView::currentChanged(const QModelIndex &current, const QModelIndex &previous)
+{
+#ifndef QT_NO_ACCESSIBILITY
+ if (QAccessible::isActive()) {
+ int entry = visualIndex(current) + 1;
+ if (header())
+ ++entry;
+ QAccessible::updateAccessibility(viewport(), entry, QAccessible::Focus);
+ }
+#endif
+ QAbstractItemView::currentChanged(current, previous);
+}
+
+/*!
+ \reimp
+ */
+void QTreeView::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;
+ if (header())
+ ++entry;
+ QAccessible::updateAccessibility(viewport(), entry, QAccessible::Selection);
+ }
+ QModelIndex desel = deselected.indexes().value(0);
+ if (desel.isValid()) {
+ int entry = visualIndex(desel) + 1;
+ if (header())
+ ++entry;
+ QAccessible::updateAccessibility(viewport(), entry, QAccessible::SelectionRemove);
+ }
+ }
+#endif
+ QAbstractItemView::selectionChanged(selected, deselected);
+}
+
+int QTreeView::visualIndex(const QModelIndex &index) const
+{
+ Q_D(const QTreeView);
+ d->executePostedLayout();
+ return d->viewIndex(index);
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qtreeview.cpp"
+
+#endif // QT_NO_TREEVIEW
generated by cgit v0.12 at 2024-11-21 19:17:35 (GMT)