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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QBSPTREE_P_H
+#define QBSPTREE_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 <qvector.h>
+#include <qrect.h>
+
+QT_BEGIN_NAMESPACE
+
+class QBspTree
+{
+public:
+
+ struct Node
+ {
+ enum Type { None = 0, VerticalPlane = 1, HorizontalPlane = 2, Both = 3 };
+ inline Node() : pos(0), type(None) {}
+ int pos;
+ Type type;
+ };
+ typedef Node::Type NodeType;
+
+ struct Data
+ {
+ Data(void *p) : ptr(p) {}
+ Data(int n) : i(n) {}
+ union {
+ void *ptr;
+ int i;
+ };
+ };
+ typedef QBspTree::Data QBspTreeData;
+ typedef void callback(QVector<int> &leaf, const QRect &area, uint visited, QBspTreeData data);
+
+ QBspTree();
+
+ void create(int n, int d = -1);
+ void destroy();
+
+ inline void init(const QRect &area, NodeType type) { init(area, depth, type, 0); }
+
+ void climbTree(const QRect &rect, callback *function, QBspTreeData data);
+
+ inline int leafCount() const { return leaves.count(); }
+ inline QVector<int> &leaf(int i) { return leaves[i]; }
+ inline void insertLeaf(const QRect &r, int i) { climbTree(r, &insert, i, 0); }
+ inline void removeLeaf(const QRect &r, int i) { climbTree(r, &remove, i, 0); }
+
+protected:
+ void init(const QRect &area, int depth, NodeType type, int index);
+ void climbTree(const QRect &rect, callback *function, QBspTreeData data, int index);
+
+ inline int parentIndex(int i) const { return (i & 1) ? ((i - 1) / 2) : ((i - 2) / 2); }
+ inline int firstChildIndex(int i) const { return ((i * 2) + 1); }
+
+ static void insert(QVector<int> &leaf, const QRect &area, uint visited, QBspTreeData data);
+ static void remove(QVector<int> &leaf, const QRect &area, uint visited, QBspTreeData data);
+
+private:
+ uint depth;
+ mutable uint visited;
+ QVector<Node> nodes;
+ mutable QVector< QVector<int> > leaves; // the leaves are just indices into the items
+};
+
+QT_END_NAMESPACE
+
+#endif // QBSPTREE_P_H