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authorLars Knoll <lars.knoll@nokia.com>2009-03-23 09:34:13 (GMT)
committerSimon Hausmann <simon.hausmann@nokia.com>2009-03-23 09:34:13 (GMT)
commit67ad0519fd165acee4a4d2a94fa502e9e4847bd0 (patch)
tree1dbf50b3dff8d5ca7e9344733968c72704eb15ff /src/gui/graphicsview/qgraphicsscene_bsp_p.h
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Long live Qt!
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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 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);
+ QList<QGraphicsItem *> items(const QPointF &pos);
+ 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 QPointF &pos, int index = 0);
+ void climbTree(QGraphicsSceneBspTreeVisitor *visitor, const QRectF &rect, int index = 0);
+
+ void findItems(QList<QGraphicsItem *> *foundItems, const QRectF &rect, int index);
+ void findItems(QList<QGraphicsItem *> *foundItems, const QPointF &pos, int index);
+ 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