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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 documentation 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 //! [0] |
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43 QGraphicsScene scene; |
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44 QGraphicsRectItem *rect = scene.addRect(QRectF(0, 0, 100, 100)); |
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45 |
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46 QGraphicsItem *item = scene.itemAt(50, 50); |
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47 // item == rect |
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48 //! [0] |
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49 |
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50 |
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51 //! [1] |
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52 QGraphicsScene scene; |
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53 myPopulateScene(&scene); |
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54 |
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55 QGraphicsView view(&scene); |
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56 view.show(); |
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57 //! [1] |
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58 |
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59 |
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60 //! [2] |
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61 class View : public QGraphicsView |
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62 { |
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63 Q_OBJECT |
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64 ... |
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65 public slots: |
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66 void zoomIn() { scale(1.2, 1.2); } |
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67 void zoomOut() { scale(1 / 1.2, 1 / 1.2); } |
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68 void rotateLeft() { rotate(-10); } |
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69 void rotateRight() { rotate(10); } |
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70 ... |
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71 }; |
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72 //! [2] |
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73 |
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74 |
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75 //! [3] |
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76 QGraphicsScene scene; |
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77 scene.addRect(QRectF(0, 0, 100, 200), QPen(Qt::black), QBrush(Qt::green)); |
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78 |
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79 QPrinter printer; |
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80 if (QPrintDialog(&printer).exec() == QDialog::Accepted) { |
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81 QPainter painter(&printer); |
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82 painter.setRenderHint(QPainter::Antialiasing); |
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83 scene.render(&painter); |
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84 } |
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85 //! [3] |
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86 |
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87 |
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88 //! [4] |
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89 QGraphicsScene scene; |
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90 scene.addRect(QRectF(0, 0, 100, 200), QPen(Qt::black), QBrush(Qt::green)); |
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91 |
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92 QPixmap pixmap; |
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93 QPainter painter(&pixmap); |
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94 painter.setRenderHint(QPainter::Antialiasing); |
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95 scene.render(&painter); |
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96 painter.end(); |
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97 |
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98 pixmap.save("scene.png"); |
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99 //! [4] |
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100 |
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101 |
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102 //! [5] |
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103 void CustomItem::mousePressEvent(QGraphicsSceneMouseEvent *event) |
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104 { |
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105 QMimeData *data = new QMimeData; |
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106 data->setColor(Qt::green); |
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107 |
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108 QDrag *drag = new QDrag(event->widget()); |
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109 drag->setMimeData(data); |
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110 drag->start(); |
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111 } |
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112 //! [5] |
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113 |
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114 |
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115 //! [6] |
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116 QGraphicsView view(&scene); |
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117 view.setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers))); |
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118 //! [6] |