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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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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 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt 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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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QGRAPHICSSCENEINDEX_H
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#define QGRAPHICSSCENEINDEX_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 for the convenience
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// of other Qt classes. 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 "qgraphicsscene_p.h"
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#include "qgraphicsscene.h"
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#include <private/qobject_p.h>
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#include <QtCore/qnamespace.h>
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#include <QtCore/qobject.h>
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#include <QtGui/qtransform.h>
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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QT_MODULE(Gui)
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#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
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class QGraphicsSceneIndexIntersector;
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class QGraphicsSceneIndexPointIntersector;
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class QGraphicsSceneIndexRectIntersector;
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class QGraphicsSceneIndexPathIntersector;
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class QGraphicsSceneIndexPrivate;
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class QPointF;
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class QRectF;
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template<typename T> class QList;
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class Q_AUTOTEST_EXPORT QGraphicsSceneIndex : public QObject
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{
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Q_OBJECT
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public:
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QGraphicsSceneIndex(QGraphicsScene *scene = 0);
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virtual ~QGraphicsSceneIndex();
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QGraphicsScene *scene() const;
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virtual QList<QGraphicsItem *> items(Qt::SortOrder order = Qt::DescendingOrder) const = 0;
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virtual QList<QGraphicsItem *> items(const QPointF &pos, Qt::ItemSelectionMode mode,
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Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
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virtual QList<QGraphicsItem *> items(const QRectF &rect, Qt::ItemSelectionMode mode,
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Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
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virtual QList<QGraphicsItem *> items(const QPolygonF &polygon, Qt::ItemSelectionMode mode,
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Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
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virtual QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode,
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Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const;
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virtual QList<QGraphicsItem *> estimateItems(const QPointF &point, Qt::SortOrder order) const;
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virtual QList<QGraphicsItem *> estimateItems(const QRectF &rect, Qt::SortOrder order) const = 0;
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virtual QList<QGraphicsItem *> estimateTopLevelItems(const QRectF &, Qt::SortOrder order) const;
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protected Q_SLOTS:
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virtual void updateSceneRect(const QRectF &rect);
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protected:
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virtual void clear();
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virtual void addItem(QGraphicsItem *item) = 0;
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virtual void removeItem(QGraphicsItem *item) = 0;
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virtual void deleteItem(QGraphicsItem *item);
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virtual void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange, const QVariant &value);
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virtual void prepareBoundingRectChange(const QGraphicsItem *item);
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QGraphicsSceneIndex(QGraphicsSceneIndexPrivate &dd, QGraphicsScene *scene);
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friend class QGraphicsScene;
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friend class QGraphicsScenePrivate;
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friend class QGraphicsItem;
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friend class QGraphicsItemPrivate;
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friend class QGraphicsSceneBspTreeIndex;
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private:
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Q_DISABLE_COPY(QGraphicsSceneIndex)
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Q_DECLARE_PRIVATE(QGraphicsSceneIndex)
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};
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class QGraphicsSceneIndexPrivate : public QObjectPrivate
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{
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Q_DECLARE_PUBLIC(QGraphicsSceneIndex)
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public:
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QGraphicsSceneIndexPrivate(QGraphicsScene *scene);
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~QGraphicsSceneIndexPrivate();
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void init();
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static bool itemCollidesWithPath(const QGraphicsItem *item, const QPainterPath &path, Qt::ItemSelectionMode mode);
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void recursive_items_helper(QGraphicsItem *item, QRectF exposeRect,
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QGraphicsSceneIndexIntersector *intersector, QList<QGraphicsItem *> *items,
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const QTransform &viewTransform,
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Qt::ItemSelectionMode mode, qreal parentOpacity = 1.0) const;
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inline void items_helper(const QRectF &rect, QGraphicsSceneIndexIntersector *intersector,
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QList<QGraphicsItem *> *items, const QTransform &viewTransform,
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Qt::ItemSelectionMode mode, Qt::SortOrder order) const;
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QGraphicsScene *scene;
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QGraphicsSceneIndexPointIntersector *pointIntersector;
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QGraphicsSceneIndexRectIntersector *rectIntersector;
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QGraphicsSceneIndexPathIntersector *pathIntersector;
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};
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inline void QGraphicsSceneIndexPrivate::items_helper(const QRectF &rect, QGraphicsSceneIndexIntersector *intersector,
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QList<QGraphicsItem *> *items, const QTransform &viewTransform,
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Qt::ItemSelectionMode mode, Qt::SortOrder order) const
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{
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Q_Q(const QGraphicsSceneIndex);
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const QList<QGraphicsItem *> tli = q->estimateTopLevelItems(rect, Qt::AscendingOrder);
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for (int i = 0; i < tli.size(); ++i)
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recursive_items_helper(tli.at(i), rect, intersector, items, viewTransform, mode);
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if (order == Qt::DescendingOrder) {
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const int n = items->size();
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for (int i = 0; i < n / 2; ++i)
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items->swap(i, n - i - 1);
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}
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}
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class QGraphicsSceneIndexIntersector
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{
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public:
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QGraphicsSceneIndexIntersector() { }
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virtual ~QGraphicsSceneIndexIntersector() { }
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virtual bool intersect(const QGraphicsItem *item, const QRectF &exposeRect, Qt::ItemSelectionMode mode,
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const QTransform &deviceTransform) const = 0;
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};
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#endif // QT_NO_GRAPHICSVIEW
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QGRAPHICSSCENEINDEX_H
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