Mercurial > projects > qtd
annotate examples/graphicsview/elasticnodes/graphwidget.d @ 374:681af90e1d53
Removed debug writelns. Fixed build script.
author | Max Samukha <maxter@spambox.com> |
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date | Thu, 08 Jul 2010 22:21:56 +0300 |
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rev | line source |
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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2010 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 examples of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** Commercial Usage |
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11 ** Licensees holding valid Qt Commercial licenses may use this file in |
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12 ** accordance with the Qt Commercial License Agreement provided with the |
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13 ** Software or, alternatively, in accordance with the terms contained in |
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14 ** a written agreement between you and Nokia. |
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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 ** GNU General Public License Usage |
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29 ** Alternatively, this file may be used under the terms of the GNU |
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30 ** General Public License version 3.0 as published by the Free Software |
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31 ** Foundation and appearing in the file LICENSE.GPL included in the |
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32 ** packaging of this file. Please review the following information to |
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33 ** ensure the GNU General Public License version 3.0 requirements will be |
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34 ** met: http://www.gnu.org/copyleft/gpl.html. |
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35 ** |
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36 ** If you have questions regarding the use of this file, please contact |
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37 ** Nokia at qt-info@nokia.com. |
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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 import |
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43 std.math; |
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44 |
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45 import |
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46 qt.gui.QLinearGradient, |
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47 qt.gui.QGraphicsView, |
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48 qt.gui.QGraphicsScene; |
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49 |
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50 import |
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51 edge, |
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52 node; |
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53 |
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54 class GraphWidget : QGraphicsView |
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55 { |
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56 public: |
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57 this() |
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58 { |
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59 auto scene = new QGraphicsScene(this); |
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60 scene.setItemIndexMethod(QGraphicsScene.NoIndex); |
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61 scene.setSceneRect(-200, -200, 400, 400); |
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62 setScene(scene); |
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63 setCacheMode(CacheBackground); |
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64 setViewportUpdateMode(BoundingRectViewportUpdate); |
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65 setRenderHint(QPainter.Antialiasing); |
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66 setTransformationAnchor(AnchorUnderMouse); |
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67 setResizeAnchor(AnchorViewCenter); |
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68 |
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69 Node node1 = new Node(this); |
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70 Node node2 = new Node(this); |
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71 Node node3 = new Node(this); |
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72 Node node4 = new Node(this); |
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73 centerNode = new Node(this); |
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74 Node node6 = new Node(this); |
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75 Node node7 = new Node(this); |
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76 Node node8 = new Node(this); |
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77 Node node9 = new Node(this); |
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78 scene.addItem(node1); |
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79 scene.addItem(node2); |
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80 scene.addItem(node3); |
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81 scene.addItem(node4); |
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82 scene.addItem(centerNode); |
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83 scene.addItem(node6); |
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84 scene.addItem(node7); |
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85 scene.addItem(node8); |
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86 scene.addItem(node9); |
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87 scene.addItem(new Edge(node1, node2)); |
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88 scene.addItem(new Edge(node2, node3)); |
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89 scene.addItem(new Edge(node2, centerNode)); |
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90 scene.addItem(new Edge(node3, node6)); |
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91 scene.addItem(new Edge(node4, node1)); |
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92 scene.addItem(new Edge(node4, centerNode)); |
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93 scene.addItem(new Edge(centerNode, node6)); |
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94 scene.addItem(new Edge(centerNode, node8)); |
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95 scene.addItem(new Edge(node6, node9)); |
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96 scene.addItem(new Edge(node7, node4)); |
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97 scene.addItem(new Edge(node8, node7)); |
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98 scene.addItem(new Edge(node9, node8)); |
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99 |
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100 node1.setPos(-50, -50); |
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101 node2.setPos(0, -50); |
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102 node3.setPos(50, -50); |
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103 node4.setPos(-50, 0); |
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104 centerNode.setPos(0, 0); |
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105 node6.setPos(50, 0); |
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106 node7.setPos(-50, 50); |
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107 node8.setPos(0, 50); |
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108 node9.setPos(50, 50); |
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109 |
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110 scale(0.8, 0.8); |
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111 setMinimumSize(400, 400); |
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112 setWindowTitle(tr("Elastic Nodes")); |
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113 } |
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114 |
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115 void itemMoved() |
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116 { |
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117 if (!timerId) |
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118 timerId = startTimer(1000 / 25); |
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119 } |
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120 |
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121 protected: |
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122 void keyPressEvent(QKeyEvent event) |
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123 { |
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124 switch (event.key()) { |
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125 case Qt.Key_Up: |
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126 centerNode.moveBy(0, -20); |
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127 break; |
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128 case Qt.Key_Down: |
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129 centerNode.moveBy(0, 20); |
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130 break; |
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131 case Qt.Key_Left: |
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132 centerNode.moveBy(-20, 0); |
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133 break; |
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134 case Qt.Key_Right: |
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135 centerNode.moveBy(20, 0); |
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136 break; |
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137 case Qt.Key_Plus: |
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138 scaleView(1.2); |
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139 break; |
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140 case Qt.Key_Minus: |
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141 scaleView(1 / 1.2); |
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142 break; |
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143 case Qt.Key_Space: |
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144 case Qt.Key_Enter: |
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145 foreach (IQGraphicsItem item; scene().items()) { |
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146 if (cast(Node)item) |
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147 item.setPos(-150 + qrand() % 300, -150 + qrand() % 300); |
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148 } |
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149 break; |
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150 default: |
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151 super.keyPressEvent(event); |
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152 } |
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153 } |
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154 |
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155 void timerEvent(QTimerEvent event) |
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156 { |
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157 Node[] nodes; |
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158 foreach (IQGraphicsItem item; scene().items()) { |
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159 if (auto node = cast(Node)item) |
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160 nodes ~= node; |
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161 } |
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162 |
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163 foreach (Node node; nodes) |
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164 node.calculateForces(); |
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165 |
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166 bool itemsMoved = false; |
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167 foreach (Node node; nodes) { |
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168 if (node.advance()) |
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169 itemsMoved = true; |
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170 } |
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171 |
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172 if (!itemsMoved) { |
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173 killTimer(timerId); |
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174 timerId = 0; |
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175 } |
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176 } |
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177 |
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178 void wheelEvent(QWheelEvent event) |
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179 { |
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180 scaleView(pow(cast(float)2, cast(float)(-event.delta() / 240.0))); |
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181 } |
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182 |
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183 void drawBackground(QPainter painter, const QRectF rect) |
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184 { |
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185 // Shadow |
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186 QRectF sceneRect = this.sceneRect(); |
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187 auto rightShadow = QRectF(sceneRect.right(), sceneRect.top() + 5, 5, sceneRect.height()); |
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188 auto bottomShadow = QRectF(sceneRect.left() + 5, sceneRect.bottom(), sceneRect.width(), 5); |
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189 if (rightShadow.intersects(rect) || rightShadow.contains(rect)) |
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190 painter.fillRect(rightShadow, Qt.darkGray); |
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191 if (bottomShadow.intersects(rect) || bottomShadow.contains(rect)) |
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192 painter.fillRect(bottomShadow, Qt.darkGray); |
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193 |
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194 // Fill |
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195 auto gradient = new QLinearGradient(sceneRect.topLeft(), sceneRect.bottomRight()); |
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196 gradient.setColorAt(0, new QColor(Qt.white)); |
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197 gradient.setColorAt(1, new QColor(Qt.lightGray)); |
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198 painter.fillRect(rect.intersected(sceneRect), new QBrush(gradient)); |
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199 painter.setBrush(Qt.NoBrush); |
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200 painter.drawRect(sceneRect); |
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201 |
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202 // Text |
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203 auto textRect = QRectF(sceneRect.left() + 4, sceneRect.top() + 4, |
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204 sceneRect.width() - 4, sceneRect.height() - 4); |
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205 string message = tr("Click and drag the nodes around, and zoom with the mouse " |
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206 "wheel or the '+' and '-' keys"); |
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207 |
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208 QFont font = painter.font(); |
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209 font.setBold(true); |
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210 font.setPointSize(14); |
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211 painter.setFont(font); |
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212 painter.setPen(new QColor(Qt.lightGray)); |
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213 painter.drawText(textRect.translated(2, 2), message); |
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214 painter.setPen(new QColor(Qt.black)); |
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215 painter.drawText(textRect, message); |
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216 } |
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217 |
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218 void scaleView(qreal scaleFactor) |
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219 { |
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220 qreal factor = matrix().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width(); |
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221 if (factor < 0.07 || factor > 100) |
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222 return; |
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223 |
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224 scale(scaleFactor, scaleFactor); |
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225 } |
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226 |
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227 private: |
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228 int timerId; |
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229 Node centerNode; |
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230 |
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231 mixin Q_OBJECT; |
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232 }; |