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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore 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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#ifndef QGRAPHICSBSPTREEINDEX_H
#define QGRAPHICSBSPTREEINDEX_H
#include <QtCore/qglobal.h>
#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
#include "qgraphicssceneindex_p.h"
#include "qgraphicsitem_p.h"
#include "qgraphicsscene_bsp_p.h"
#include <QtCore/qrect.h>
#include <QtCore/qlist.h>
QT_BEGIN_NAMESPACE
static const int QGRAPHICSSCENE_INDEXTIMER_TIMEOUT = 2000;
class QGraphicsScene;
class QGraphicsSceneBspTreeIndexPrivate;
class Q_AUTOTEST_EXPORT QGraphicsSceneBspTreeIndex : public QGraphicsSceneIndex
{
Q_OBJECT
Q_PROPERTY(int bspTreeDepth READ bspTreeDepth WRITE setBspTreeDepth)
public:
QGraphicsSceneBspTreeIndex(QGraphicsScene *scene = 0);
~QGraphicsSceneBspTreeIndex();
QList<QGraphicsItem *> estimateItems(const QRectF &rect, Qt::SortOrder order) const;
QList<QGraphicsItem *> estimateTopLevelItems(const QRectF &rect, Qt::SortOrder order) const;
QList<QGraphicsItem *> items(Qt::SortOrder order = Qt::DescendingOrder) const;
int bspTreeDepth();
void setBspTreeDepth(int depth);
protected Q_SLOTS:
void updateSceneRect(const QRectF &rect);
protected:
bool event(QEvent *event);
void clear();
void addItem(QGraphicsItem *item);
void removeItem(QGraphicsItem *item);
void prepareBoundingRectChange(const QGraphicsItem *item);
void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const QVariant &value);
private :
Q_DECLARE_PRIVATE(QGraphicsSceneBspTreeIndex)
Q_DISABLE_COPY(QGraphicsSceneBspTreeIndex)
Q_PRIVATE_SLOT(d_func(), void _q_updateSortCache())
Q_PRIVATE_SLOT(d_func(), void _q_updateIndex())
friend class QGraphicsScene;
friend class QGraphicsScenePrivate;
};
class QGraphicsSceneBspTreeIndexPrivate : public QGraphicsSceneIndexPrivate
{
Q_DECLARE_PUBLIC(QGraphicsSceneBspTreeIndex)
public:
QGraphicsSceneBspTreeIndexPrivate(QGraphicsScene *scene);
QGraphicsSceneBspTree bsp;
QRectF sceneRect;
int bspTreeDepth;
int indexTimerId;
bool restartIndexTimer;
bool regenerateIndex;
int lastItemCount;
QList<QGraphicsItem *> indexedItems;
QList<QGraphicsItem *> unindexedItems;
QList<QGraphicsItem *> untransformableItems;
QList<int> freeItemIndexes;
bool purgePending;
QSet<QGraphicsItem *> removedItems;
void purgeRemovedItems();
void _q_updateIndex();
void startIndexTimer(int interval = QGRAPHICSSCENE_INDEXTIMER_TIMEOUT);
void resetIndex();
void _q_updateSortCache();
bool sortCacheEnabled;
bool updatingSortCache;
void invalidateSortCache();
void addItem(QGraphicsItem *item, bool recursive = false);
void removeItem(QGraphicsItem *item, bool recursive = false, bool moveToUnindexedItems = false);
QList<QGraphicsItem *> estimateItems(const QRectF &, Qt::SortOrder, bool b = false);
static void climbTree(QGraphicsItem *item, int *stackingOrder);
static bool closestItemFirst_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
static bool closestItemLast_withoutCache(const QGraphicsItem *item1, const QGraphicsItem *item2);
static inline bool closestItemFirst_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
{
return item1->d_ptr->globalStackingOrder < item2->d_ptr->globalStackingOrder;
}
static inline bool closestItemLast_withCache(const QGraphicsItem *item1, const QGraphicsItem *item2)
{
return item1->d_ptr->globalStackingOrder >= item2->d_ptr->globalStackingOrder;
}
static void sortItems(QList<QGraphicsItem *> *itemList, Qt::SortOrder order,
bool cached, bool onlyTopLevelItems = false);
};
static inline bool QRectF_intersects(const QRectF &s, const QRectF &r)
{
qreal xp = s.left();
qreal yp = s.top();
qreal w = s.width();
qreal h = s.height();
qreal l1 = xp;
qreal r1 = xp;
if (w < 0)
l1 += w;
else
r1 += w;
qreal l2 = r.left();
qreal r2 = r.left();
if (w < 0)
l2 += r.width();
else
r2 += r.width();
if (l1 >= r2 || l2 >= r1)
return false;
qreal t1 = yp;
qreal b1 = yp;
if (h < 0)
t1 += h;
else
b1 += h;
qreal t2 = r.top();
qreal b2 = r.top();
if (r.height() < 0)
t2 += r.height();
else
b2 += r.height();
return !(t1 >= b2 || t2 >= b1);
}
QT_END_NAMESPACE
#endif // QT_NO_GRAPHICSVIEW
#endif // QGRAPHICSBSPTREEINDEX_H
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