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| |
| #ifndef QGRAPHICSSCENEINDEX_H |
| #define QGRAPHICSSCENEINDEX_H |
| |
| // |
| // 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. |
| // |
| |
| #include <QtWidgets/private/qtwidgetsglobal_p.h> |
| #include "qgraphicsscene_p.h" |
| #include "qgraphicsscene.h" |
| #include <private/qobject_p.h> |
| |
| #include <QtCore/qnamespace.h> |
| #include <QtCore/qobject.h> |
| #include <QtGui/qtransform.h> |
| |
| QT_REQUIRE_CONFIG(graphicsview); |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QGraphicsSceneIndexPrivate; |
| class QPointF; |
| class QRectF; |
| template<typename T> class QList; |
| |
| typedef bool (*QGraphicsSceneIndexIntersector)(const QGraphicsItem *item, const QRectF &exposeRect, Qt::ItemSelectionMode mode, |
| const QTransform &deviceTransform, const void *data); |
| |
| class Q_AUTOTEST_EXPORT QGraphicsSceneIndex : public QObject |
| { |
| Q_OBJECT |
| |
| public: |
| QGraphicsSceneIndex(QGraphicsScene *scene = nullptr); |
| virtual ~QGraphicsSceneIndex(); |
| |
| QGraphicsScene *scene() const; |
| |
| virtual QList<QGraphicsItem *> items(Qt::SortOrder order = Qt::DescendingOrder) const = 0; |
| virtual QList<QGraphicsItem *> items(const QPointF &pos, Qt::ItemSelectionMode mode, |
| Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const; |
| virtual QList<QGraphicsItem *> items(const QRectF &rect, Qt::ItemSelectionMode mode, |
| Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const; |
| virtual QList<QGraphicsItem *> items(const QPolygonF &polygon, Qt::ItemSelectionMode mode, |
| Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const; |
| virtual QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode, |
| Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const; |
| virtual QList<QGraphicsItem *> estimateItems(const QPointF &point, Qt::SortOrder order) const; |
| virtual QList<QGraphicsItem *> estimateItems(const QRectF &rect, Qt::SortOrder order) const = 0; |
| virtual QList<QGraphicsItem *> estimateTopLevelItems(const QRectF &, Qt::SortOrder order) const; |
| |
| protected Q_SLOTS: |
| virtual void updateSceneRect(const QRectF &rect); |
| |
| protected: |
| virtual void clear(); |
| virtual void addItem(QGraphicsItem *item) = 0; |
| virtual void removeItem(QGraphicsItem *item) = 0; |
| virtual void deleteItem(QGraphicsItem *item); |
| |
| virtual void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange, const void *const value); |
| virtual void prepareBoundingRectChange(const QGraphicsItem *item); |
| |
| QGraphicsSceneIndex(QGraphicsSceneIndexPrivate &dd, QGraphicsScene *scene); |
| |
| friend class QGraphicsScene; |
| friend class QGraphicsScenePrivate; |
| friend class QGraphicsItem; |
| friend class QGraphicsItemPrivate; |
| friend class QGraphicsSceneBspTreeIndex; |
| private: |
| Q_DISABLE_COPY_MOVE(QGraphicsSceneIndex) |
| Q_DECLARE_PRIVATE(QGraphicsSceneIndex) |
| }; |
| |
| class QGraphicsSceneIndexPrivate : public QObjectPrivate |
| { |
| Q_DECLARE_PUBLIC(QGraphicsSceneIndex) |
| public: |
| QGraphicsSceneIndexPrivate(QGraphicsScene *scene); |
| ~QGraphicsSceneIndexPrivate(); |
| |
| void init(); |
| static bool itemCollidesWithPath(const QGraphicsItem *item, const QPainterPath &path, Qt::ItemSelectionMode mode); |
| |
| void recursive_items_helper(QGraphicsItem *item, QRectF exposeRect, |
| QGraphicsSceneIndexIntersector intersect, QList<QGraphicsItem *> *items, |
| const QTransform &viewTransform, |
| Qt::ItemSelectionMode mode, qreal parentOpacity, const void *intersectData) const; |
| inline void items_helper(const QRectF &rect, QGraphicsSceneIndexIntersector intersect, |
| QList<QGraphicsItem *> *items, const QTransform &viewTransform, |
| Qt::ItemSelectionMode mode, Qt::SortOrder order, const void *intersectData) const; |
| |
| QGraphicsScene *scene; |
| }; |
| |
| inline void QGraphicsSceneIndexPrivate::items_helper(const QRectF &rect, QGraphicsSceneIndexIntersector intersect, |
| QList<QGraphicsItem *> *items, const QTransform &viewTransform, |
| Qt::ItemSelectionMode mode, Qt::SortOrder order, const void *intersectData) const |
| { |
| Q_Q(const QGraphicsSceneIndex); |
| const QList<QGraphicsItem *> tli = q->estimateTopLevelItems(rect, Qt::AscendingOrder); |
| for (int i = 0; i < tli.size(); ++i) |
| recursive_items_helper(tli.at(i), rect, intersect, items, viewTransform, mode, 1.0, intersectData); |
| if (order == Qt::DescendingOrder) { |
| const int n = items->size(); |
| for (int i = 0; i < n / 2; ++i) |
| items->swapItemsAt(i, n - i - 1); |
| } |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif // QGRAPHICSSCENEINDEX_H |