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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtCore module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #ifndef QGRAPHICSSCENEINDEX_H |
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43 #define QGRAPHICSSCENEINDEX_H |
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44 |
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45 // |
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46 // W A R N I N G |
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47 // ------------- |
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48 // |
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49 // This file is not part of the Qt API. It exists for the convenience |
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50 // of other Qt classes. This header file may change from version to |
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51 // version without notice, or even be removed. |
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52 // |
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53 // We mean it. |
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54 // |
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55 |
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56 #include "qgraphicsscene_p.h" |
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57 #include "qgraphicsscene.h" |
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58 #include <private/qobject_p.h> |
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59 |
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60 #include <QtCore/qnamespace.h> |
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61 #include <QtCore/qobject.h> |
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62 #include <QtGui/qtransform.h> |
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63 |
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64 QT_BEGIN_HEADER |
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65 |
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66 QT_BEGIN_NAMESPACE |
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67 |
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68 QT_MODULE(Gui) |
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69 |
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70 #if !defined(QT_NO_GRAPHICSVIEW) || (QT_EDITION & QT_MODULE_GRAPHICSVIEW) != QT_MODULE_GRAPHICSVIEW |
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71 |
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72 class QGraphicsSceneIndexIntersector; |
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73 class QGraphicsSceneIndexPointIntersector; |
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74 class QGraphicsSceneIndexRectIntersector; |
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75 class QGraphicsSceneIndexPathIntersector; |
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76 class QGraphicsSceneIndexPrivate; |
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77 class QPointF; |
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78 class QRectF; |
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79 template<typename T> class QList; |
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80 |
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81 class Q_AUTOTEST_EXPORT QGraphicsSceneIndex : public QObject |
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82 { |
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83 Q_OBJECT |
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84 |
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85 public: |
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86 QGraphicsSceneIndex(QGraphicsScene *scene = 0); |
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87 virtual ~QGraphicsSceneIndex(); |
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88 |
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89 QGraphicsScene *scene() const; |
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90 |
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91 virtual QList<QGraphicsItem *> items(Qt::SortOrder order = Qt::DescendingOrder) const = 0; |
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92 virtual QList<QGraphicsItem *> items(const QPointF &pos, Qt::ItemSelectionMode mode, |
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93 Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const; |
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94 virtual QList<QGraphicsItem *> items(const QRectF &rect, Qt::ItemSelectionMode mode, |
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95 Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const; |
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96 virtual QList<QGraphicsItem *> items(const QPolygonF &polygon, Qt::ItemSelectionMode mode, |
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97 Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const; |
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98 virtual QList<QGraphicsItem *> items(const QPainterPath &path, Qt::ItemSelectionMode mode, |
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99 Qt::SortOrder order, const QTransform &deviceTransform = QTransform()) const; |
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100 virtual QList<QGraphicsItem *> estimateItems(const QPointF &point, Qt::SortOrder order) const; |
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101 virtual QList<QGraphicsItem *> estimateItems(const QRectF &rect, Qt::SortOrder order) const = 0; |
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102 virtual QList<QGraphicsItem *> estimateTopLevelItems(const QRectF &, Qt::SortOrder order) const; |
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103 |
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104 protected Q_SLOTS: |
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105 virtual void updateSceneRect(const QRectF &rect); |
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106 |
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107 protected: |
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108 virtual void clear(); |
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109 virtual void addItem(QGraphicsItem *item) = 0; |
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110 virtual void removeItem(QGraphicsItem *item) = 0; |
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111 virtual void deleteItem(QGraphicsItem *item); |
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112 |
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113 virtual void itemChange(const QGraphicsItem *item, QGraphicsItem::GraphicsItemChange, const QVariant &value); |
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114 virtual void prepareBoundingRectChange(const QGraphicsItem *item); |
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115 |
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116 QGraphicsSceneIndex(QGraphicsSceneIndexPrivate &dd, QGraphicsScene *scene); |
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117 |
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118 friend class QGraphicsScene; |
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119 friend class QGraphicsScenePrivate; |
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120 friend class QGraphicsItem; |
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121 friend class QGraphicsItemPrivate; |
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122 friend class QGraphicsSceneBspTreeIndex; |
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123 private: |
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124 Q_DISABLE_COPY(QGraphicsSceneIndex) |
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125 Q_DECLARE_PRIVATE(QGraphicsSceneIndex) |
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126 }; |
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127 |
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128 class QGraphicsSceneIndexPrivate : public QObjectPrivate |
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129 { |
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130 Q_DECLARE_PUBLIC(QGraphicsSceneIndex) |
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131 public: |
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132 QGraphicsSceneIndexPrivate(QGraphicsScene *scene); |
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133 ~QGraphicsSceneIndexPrivate(); |
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134 |
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135 void init(); |
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136 static bool itemCollidesWithPath(const QGraphicsItem *item, const QPainterPath &path, Qt::ItemSelectionMode mode); |
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137 |
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138 void recursive_items_helper(QGraphicsItem *item, QRectF exposeRect, |
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139 QGraphicsSceneIndexIntersector *intersector, QList<QGraphicsItem *> *items, |
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140 const QTransform &viewTransform, |
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141 Qt::ItemSelectionMode mode, qreal parentOpacity = 1.0) const; |
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142 inline void items_helper(const QRectF &rect, QGraphicsSceneIndexIntersector *intersector, |
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143 QList<QGraphicsItem *> *items, const QTransform &viewTransform, |
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144 Qt::ItemSelectionMode mode, Qt::SortOrder order) const; |
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145 |
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146 QGraphicsScene *scene; |
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147 QGraphicsSceneIndexPointIntersector *pointIntersector; |
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148 QGraphicsSceneIndexRectIntersector *rectIntersector; |
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149 QGraphicsSceneIndexPathIntersector *pathIntersector; |
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150 }; |
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151 |
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152 inline void QGraphicsSceneIndexPrivate::items_helper(const QRectF &rect, QGraphicsSceneIndexIntersector *intersector, |
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153 QList<QGraphicsItem *> *items, const QTransform &viewTransform, |
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154 Qt::ItemSelectionMode mode, Qt::SortOrder order) const |
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155 { |
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156 Q_Q(const QGraphicsSceneIndex); |
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157 const QList<QGraphicsItem *> tli = q->estimateTopLevelItems(rect, Qt::AscendingOrder); |
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158 for (int i = 0; i < tli.size(); ++i) |
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159 recursive_items_helper(tli.at(i), rect, intersector, items, viewTransform, mode); |
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160 if (order == Qt::DescendingOrder) { |
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161 const int n = items->size(); |
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162 for (int i = 0; i < n / 2; ++i) |
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163 items->swap(i, n - i - 1); |
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164 } |
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165 } |
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166 |
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167 class QGraphicsSceneIndexIntersector |
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168 { |
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169 public: |
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170 QGraphicsSceneIndexIntersector() { } |
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171 virtual ~QGraphicsSceneIndexIntersector() { } |
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172 virtual bool intersect(const QGraphicsItem *item, const QRectF &exposeRect, Qt::ItemSelectionMode mode, |
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173 const QTransform &deviceTransform) const = 0; |
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174 }; |
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175 |
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176 #endif // QT_NO_GRAPHICSVIEW |
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177 |
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178 QT_END_NAMESPACE |
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179 |
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180 QT_END_HEADER |
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181 |
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182 #endif // QGRAPHICSSCENEINDEX_H |