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| ** |
| ** Copyright (C) 2015 The Qt Company Ltd. |
| ** Contact: http://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtCore module of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL21$ |
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| ****************************************************************************/ |
| |
| // |
| // 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) |
| |
| #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 Q_DECL_OVERRIDE; |
| QList<QGraphicsItem *> estimateTopLevelItems(const QRectF &rect, Qt::SortOrder order) const Q_DECL_OVERRIDE; |
| QList<QGraphicsItem *> items(Qt::SortOrder order = Qt::DescendingOrder) const Q_DECL_OVERRIDE; |
| |
| int bspTreeDepth() const; |
| void setBspTreeDepth(int depth); |
| |
| protected Q_SLOTS: |
| void updateSceneRect(const QRectF &rect) Q_DECL_OVERRIDE; |
| |
| protected: |
| bool event(QEvent *event) Q_DECL_OVERRIDE; |
| void clear() Q_DECL_OVERRIDE; |
| |
| void addItem(QGraphicsItem *item) Q_DECL_OVERRIDE; |
| void removeItem(QGraphicsItem *item) Q_DECL_OVERRIDE; |
| void prepareBoundingRectChange(const QGraphicsItem *item) Q_DECL_OVERRIDE; |
| |
| void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange change, const void *const value) Q_DECL_OVERRIDE; |
| |
| 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 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 |