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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTREEVIEW_P_H
#define QTREEVIEW_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "private/qabstractitemview_p.h"
#ifndef QT_NO_TREEVIEW
QT_BEGIN_NAMESPACE
struct QTreeViewItem
{
QTreeViewItem() : expanded(false), spanning(false), total(0), level(0), height(0) {}
QModelIndex index; // we remove items whenever the indexes are invalidated
uint expanded : 1;
uint spanning : 1;
uint total : 30; // total number of children visible
uint level : 16; // indentation
int height : 16; // row height
};
class QTreeViewPrivate : public QAbstractItemViewPrivate
{
Q_DECLARE_PUBLIC(QTreeView)
public:
QTreeViewPrivate()
: QAbstractItemViewPrivate(),
header(0), indent(20), lastViewedItem(0), defaultItemHeight(-1),
uniformRowHeights(false), rootDecoration(true),
itemsExpandable(true), sortingEnabled(false),
expandsOnDoubleClick(true),
allColumnsShowFocus(false),
animationsEnabled(false), columnResizeTimerID(0),
autoExpandDelay(-1), hoverBranch(-1), geometryRecursionBlock(false) {}
~QTreeViewPrivate() {}
void initialize();
struct AnimatedOperation
{
enum Type { Expand, Collapse };
int item;
int top;
int duration;
Type type;
QPixmap before;
QPixmap after;
};
void expand(int item, bool emitSignal);
void collapse(int item, bool emitSignal);
void prepareAnimatedOperation(int item, AnimatedOperation::Type type);
void beginAnimatedOperation();
void _q_endAnimatedOperation();
void drawAnimatedOperation(QPainter *painter) const;
QPixmap renderTreeToPixmapForAnimation(const QRect &rect) const;
inline QRect animationRect() const
{ return QRect(0, animatedOperation.top, viewport->width(),
viewport->height() - animatedOperation.top); }
void _q_currentChanged(const QModelIndex&, const QModelIndex&);
void _q_columnsAboutToBeRemoved(const QModelIndex &, int, int);
void _q_columnsRemoved(const QModelIndex &, int, int);
void _q_modelAboutToBeReset();
void _q_animate();
void _q_sortIndicatorChanged(int column, Qt::SortOrder order);
void _q_modelDestroyed();
void layout(int item);
int pageUp(int item) const;
int pageDown(int item) const;
int itemHeight(int item) const;
int indentationForItem(int item) const;
int coordinateForItem(int item) const;
int itemAtCoordinate(int coordinate) const;
int viewIndex(const QModelIndex &index) const;
QModelIndex modelIndex(int i, int column = 0) const;
int firstVisibleItem(int *offset = 0) const;
int columnAt(int x) const;
bool hasVisibleChildren( const QModelIndex& parent) const;
void relayout(const QModelIndex &parent);
bool expandOrCollapseItemAtPos(const QPoint &pos);
void updateScrollBars();
int itemDecorationAt(const QPoint &pos) const;
QRect itemDecorationRect(const QModelIndex &index) const;
QList<QPair<int, int> > columnRanges(const QModelIndex &topIndex, const QModelIndex &bottomIndex) const;
void select(const QModelIndex &start, const QModelIndex &stop, QItemSelectionModel::SelectionFlags command);
QPair<int,int> startAndEndColumns(const QRect &rect) const;
void updateChildCount(const int parentItem, const int delta);
void rowsRemoved(const QModelIndex &parent,
int start, int end, bool before);
void paintAlternatingRowColors(QPainter *painter, QStyleOptionViewItemV4 *option, int y, int bottom) const;
QHeaderView *header;
int indent;
mutable QVector<QTreeViewItem> viewItems;
mutable int lastViewedItem;
int defaultItemHeight; // this is just a number; contentsHeight() / numItems
bool uniformRowHeights; // used when all rows have the same height
bool rootDecoration;
bool itemsExpandable;
bool sortingEnabled;
bool expandsOnDoubleClick;
bool allColumnsShowFocus;
// used for drawing
mutable QPair<int,int> leftAndRight;
mutable int current;
mutable bool spanning;
// used when expanding and collapsing items
QSet<QPersistentModelIndex> expandedIndexes;
QStack<bool> expandParent;
AnimatedOperation animatedOperation;
bool animationsEnabled;
inline bool storeExpanded(const QPersistentModelIndex &idx) {
if (expandedIndexes.contains(idx))
return false;
expandedIndexes.insert(idx);
return true;
}
inline bool isIndexExpanded(const QModelIndex &idx) const {
//We first check if the idx is a QPersistentModelIndex, because creating QPersistentModelIndex is slow
return isPersistent(idx) && expandedIndexes.contains(idx);
}
// used when hiding and showing items
QSet<QPersistentModelIndex> hiddenIndexes;
inline bool isRowHidden(const QModelIndex &idx) const {
//We first check if the idx is a QPersistentModelIndex, because creating QPersistentModelIndex is slow
return isPersistent(idx) && hiddenIndexes.contains(idx);
}
inline bool isItemHiddenOrDisabled(int i) const {
if (i < 0 || i >= viewItems.count())
return false;
const QModelIndex index = viewItems.at(i).index;
return isRowHidden(index) || !isIndexEnabled(index);
}
inline int above(int item) const
{ int i = item; while (isItemHiddenOrDisabled(--item)){} return item < 0 ? i : item; }
inline int below(int item) const
{ int i = item; while (isItemHiddenOrDisabled(++item)){} return item >= viewItems.count() ? i : item; }
inline void invalidateHeightCache(int item) const
{ viewItems[item].height = 0; }
// used for spanning rows
QVector<QPersistentModelIndex> spanningIndexes;
// used for updating resized columns
int columnResizeTimerID;
QList<int> columnsToUpdate;
// used for the automatic opening of nodes during DND
int autoExpandDelay;
QBasicTimer openTimer;
// used for drawing hilighted expand/collapse indicators
int hoverBranch;
// used for blocking recursion when calling setViewportMargins from updateGeometries
bool geometryRecursionBlock;
};
QT_END_NAMESPACE
#endif // QT_NO_TREEVIEW
#endif // QTREEVIEW_P_H
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