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262 lines
9.7 KiB
C++
262 lines
9.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QTREEVIEW_P_H
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#define QTREEVIEW_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "qabstractitemview_p.h"
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#include <QtCore/qvariantanimation.h>
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#include <QtCore/qabstractitemmodel.h>
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#ifndef QT_NO_TREEVIEW
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QT_BEGIN_NAMESPACE
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struct QTreeViewItem
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{
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QTreeViewItem() : parentItem(-1), expanded(false), spanning(false), hasChildren(false),
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hasMoreSiblings(false), total(0), level(0), height(0) {}
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QModelIndex index; // we remove items whenever the indexes are invalidated
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int parentItem; // parent item index in viewItems
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uint expanded : 1;
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uint spanning : 1;
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uint hasChildren : 1; // if the item has visible children (even if collapsed)
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uint hasMoreSiblings : 1;
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uint total : 28; // total number of children visible
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uint level : 16; // indentation
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int height : 16; // row height
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};
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Q_DECLARE_TYPEINFO(QTreeViewItem, Q_MOVABLE_TYPE);
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class Q_GUI_EXPORT QTreeViewPrivate : public QAbstractItemViewPrivate
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{
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Q_DECLARE_PUBLIC(QTreeView)
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public:
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QTreeViewPrivate()
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: QAbstractItemViewPrivate(),
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header(0), indent(20), lastViewedItem(0), defaultItemHeight(-1),
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uniformRowHeights(false), rootDecoration(true),
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itemsExpandable(true), sortingEnabled(false),
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expandsOnDoubleClick(true),
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allColumnsShowFocus(false), current(0), spanning(false),
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animationsEnabled(false), columnResizeTimerID(0),
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autoExpandDelay(-1), hoverBranch(-1), geometryRecursionBlock(false), hasRemovedItems(false) {}
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~QTreeViewPrivate() {}
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void initialize();
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QItemViewPaintPairs draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const;
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void adjustViewOptionsForIndex(QStyleOptionViewItemV4 *option, const QModelIndex ¤t) const;
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#ifndef QT_NO_ANIMATION
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struct AnimatedOperation : public QVariantAnimation
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{
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int item;
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QPixmap before;
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QPixmap after;
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QWidget *viewport;
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AnimatedOperation() : item(0) { setEasingCurve(QEasingCurve::InOutQuad); }
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int top() const { return startValue().toInt(); }
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QRect rect() const { QRect rect = viewport->rect(); rect.moveTop(top()); return rect; }
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void updateCurrentValue(const QVariant &) { viewport->update(rect()); }
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void updateState(State state, State) { if (state == Stopped) before = after = QPixmap(); }
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} animatedOperation;
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void prepareAnimatedOperation(int item, QVariantAnimation::Direction d);
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void beginAnimatedOperation();
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void drawAnimatedOperation(QPainter *painter) const;
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QPixmap renderTreeToPixmapForAnimation(const QRect &rect) const;
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void _q_endAnimatedOperation();
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#endif //QT_NO_ANIMATION
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void expand(int item, bool emitSignal);
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void collapse(int item, bool emitSignal);
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void _q_columnsAboutToBeRemoved(const QModelIndex &, int, int);
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void _q_columnsRemoved(const QModelIndex &, int, int);
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void _q_modelAboutToBeReset();
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void _q_sortIndicatorChanged(int column, Qt::SortOrder order);
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void _q_modelDestroyed();
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void layout(int item, bool recusiveExpanding = false, bool afterIsUninitialized = false);
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int pageUp(int item) const;
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int pageDown(int item) const;
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int itemHeight(int item) const;
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int indentationForItem(int item) const;
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int coordinateForItem(int item) const;
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int itemAtCoordinate(int coordinate) const;
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int viewIndex(const QModelIndex &index) const;
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QModelIndex modelIndex(int i, int column = 0) const;
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void insertViewItems(int pos, int count, const QTreeViewItem &viewItem);
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void removeViewItems(int pos, int count);
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#if 0
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bool checkViewItems() const;
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#endif
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int firstVisibleItem(int *offset = 0) const;
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int columnAt(int x) const;
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bool hasVisibleChildren( const QModelIndex& parent) const;
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bool expandOrCollapseItemAtPos(const QPoint &pos);
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void updateScrollBars();
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int itemDecorationAt(const QPoint &pos) const;
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QRect itemDecorationRect(const QModelIndex &index) const;
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QList<QPair<int, int> > columnRanges(const QModelIndex &topIndex, const QModelIndex &bottomIndex) const;
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void select(const QModelIndex &start, const QModelIndex &stop, QItemSelectionModel::SelectionFlags command);
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QPair<int,int> startAndEndColumns(const QRect &rect) const;
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void updateChildCount(const int parentItem, const int delta);
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void paintAlternatingRowColors(QPainter *painter, QStyleOptionViewItemV4 *option, int y, int bottom) const;
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// logicalIndices: vector of currently visibly logical indices
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// itemPositions: vector of view item positions (beginning/middle/end/onlyone)
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void calcLogicalIndices(QVector<int> *logicalIndices, QVector<QStyleOptionViewItemV4::ViewItemPosition> *itemPositions, int left, int right) const;
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QHeaderView *header;
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int indent;
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mutable QVector<QTreeViewItem> viewItems;
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mutable int lastViewedItem;
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int defaultItemHeight; // this is just a number; contentsHeight() / numItems
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bool uniformRowHeights; // used when all rows have the same height
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bool rootDecoration;
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bool itemsExpandable;
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bool sortingEnabled;
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bool expandsOnDoubleClick;
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bool allColumnsShowFocus;
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// used for drawing
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mutable QPair<int,int> leftAndRight;
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mutable int current;
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mutable bool spanning;
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// used when expanding and collapsing items
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QSet<QPersistentModelIndex> expandedIndexes;
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bool animationsEnabled;
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inline bool storeExpanded(const QPersistentModelIndex &idx) {
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if (expandedIndexes.contains(idx))
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return false;
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expandedIndexes.insert(idx);
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return true;
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}
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inline bool isIndexExpanded(const QModelIndex &idx) const {
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//We first check if the idx is a QPersistentModelIndex, because creating QPersistentModelIndex is slow
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return isPersistent(idx) && expandedIndexes.contains(idx);
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}
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// used when hiding and showing items
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QSet<QPersistentModelIndex> hiddenIndexes;
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inline bool isRowHidden(const QModelIndex &idx) const {
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if (hiddenIndexes.isEmpty())
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return false;
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//We first check if the idx is a QPersistentModelIndex, because creating QPersistentModelIndex is slow
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return isPersistent(idx) && hiddenIndexes.contains(idx);
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}
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inline bool isItemHiddenOrDisabled(int i) const {
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if (i < 0 || i >= viewItems.count())
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return false;
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const QModelIndex index = viewItems.at(i).index;
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return isRowHidden(index) || !isIndexEnabled(index);
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}
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inline int above(int item) const
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{ int i = item; while (isItemHiddenOrDisabled(--item)){} return item < 0 ? i : item; }
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inline int below(int item) const
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{ int i = item; while (isItemHiddenOrDisabled(++item)){} return item >= viewItems.count() ? i : item; }
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inline void invalidateHeightCache(int item) const
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{ viewItems[item].height = 0; }
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inline int accessibleTable2Index(const QModelIndex &index) const {
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return (viewIndex(index) + (header ? 1 : 0)) * model->columnCount()+index.column() + 1;
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}
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// used for spanning rows
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QVector<QPersistentModelIndex> spanningIndexes;
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// used for updating resized columns
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int columnResizeTimerID;
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QList<int> columnsToUpdate;
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// used for the automatic opening of nodes during DND
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int autoExpandDelay;
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QBasicTimer openTimer;
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// used for drawing hilighted expand/collapse indicators
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mutable int hoverBranch;
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// used for blocking recursion when calling setViewportMargins from updateGeometries
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bool geometryRecursionBlock;
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// If we should clean the set
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bool hasRemovedItems;
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};
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QT_END_NAMESPACE
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#endif // QT_NO_TREEVIEW
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#endif // QTREEVIEW_P_H
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