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Diffstat (limited to 'src/gui/itemviews/qbsptree_p.h')
| -rw-r--r-- | src/gui/itemviews/qbsptree_p.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/gui/itemviews/qbsptree_p.h b/src/gui/itemviews/qbsptree_p.h new file mode 100644 index 0000000..ff91bfb --- /dev/null +++ b/src/gui/itemviews/qbsptree_p.h @@ -0,0 +1,119 @@ +/**************************************************************************** +** +** 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 |