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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 132 insertions, 0 deletions

diff --git a/src/gui/graphicsview/qgraphicsscene_bsp_p.h b/src/gui/graphicsview/qgraphicsscene_bsp_p.h
new file mode 100644
index 0000000000..4f230eff79
--- /dev/null
+++ b/src/gui/graphicsview/qgraphicsscene_bsp_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** 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 QGRAPHICSSCENEBSPTREE_P_H
+#define QGRAPHICSSCENEBSPTREE_P_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 <QtCore/qlist.h>
+
+#if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW
+
+#include <QtCore/qrect.h>
+#include <QtCore/qset.h>
+#include <QtCore/qvector.h>
+
+QT_BEGIN_NAMESPACE
+
+class QGraphicsItem;
+class QGraphicsSceneBspTreeVisitor;
+class QGraphicsSceneInsertItemBspTreeVisitor;
+class QGraphicsSceneRemoveItemBspTreeVisitor;
+class QGraphicsSceneFindItemBspTreeVisitor;
+
+class QGraphicsSceneBspTree
+{
+public:
+    struct Node
+    {
+        enum Type { Horizontal, Vertical, Leaf };
+        union {
+            qreal offset;
+            int leafIndex;
+        };
+        Type type;
+    };
+
+    QGraphicsSceneBspTree();
+    ~QGraphicsSceneBspTree();
+
+    void initialize(const QRectF &rect, int depth);
+    void clear();
+
+    void insertItem(QGraphicsItem *item, const QRectF &rect);
+    void removeItem(QGraphicsItem *item, const QRectF &rect);
+    void removeItems(const QSet<QGraphicsItem *> &items);
+
+    QList<QGraphicsItem *> items(const QRectF &rect, bool onlyTopLevelItems = false) const;
+    int leafCount() const;
+
+    inline int firstChildIndex(int index) const
+    { return index * 2 + 1; }
+
+    inline int parentIndex(int index) const
+    { return index > 0 ? ((index & 1) ? ((index - 1) / 2) : ((index - 2) / 2)) : -1; }
+
+    QString debug(int index) const;
+
+private:
+    void initialize(const QRectF &rect, int depth, int index);
+    void climbTree(QGraphicsSceneBspTreeVisitor *visitor, const QRectF &rect, int index = 0) const;
+    QRectF rectForIndex(int index) const;
+
+    QVector<Node> nodes;
+    QVector<QList<QGraphicsItem *> > leaves;
+    int leafCnt;
+    QRectF rect;
+
+    QGraphicsSceneInsertItemBspTreeVisitor *insertVisitor;
+    QGraphicsSceneRemoveItemBspTreeVisitor *removeVisitor;
+    QGraphicsSceneFindItemBspTreeVisitor *findVisitor;
+};
+
+class QGraphicsSceneBspTreeVisitor
+{
+public:
+    virtual ~QGraphicsSceneBspTreeVisitor() { }
+    virtual void visit(QList<QGraphicsItem *> *items) = 0;
+};
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_GRAPHICSVIEW
+
+#endif // QGRAPHICSSCENEBSPTREE_P_H