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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 examples 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 #include <QtGui> |
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43 #include <QtOpenGL> |
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44 |
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45 #include "glwidget.h" |
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46 #include "mainwindow.h" |
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47 |
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48 MainWindow::MainWindow() |
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49 { |
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50 centralWidget = new QWidget; |
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51 setCentralWidget(centralWidget); |
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52 |
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53 glWidget = new GLWidget; |
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54 pixmapLabel = new QLabel; |
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55 |
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56 glWidgetArea = new QScrollArea; |
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57 glWidgetArea->setWidget(glWidget); |
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58 glWidgetArea->setWidgetResizable(true); |
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59 glWidgetArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff); |
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60 glWidgetArea->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); |
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61 glWidgetArea->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); |
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62 glWidgetArea->setMinimumSize(50, 50); |
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63 |
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64 pixmapLabelArea = new QScrollArea; |
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65 pixmapLabelArea->setWidget(pixmapLabel); |
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66 pixmapLabelArea->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); |
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67 pixmapLabelArea->setMinimumSize(50, 50); |
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68 |
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69 xSlider = createSlider(SIGNAL(xRotationChanged(int)), |
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70 SLOT(setXRotation(int))); |
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71 ySlider = createSlider(SIGNAL(yRotationChanged(int)), |
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72 SLOT(setYRotation(int))); |
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73 zSlider = createSlider(SIGNAL(zRotationChanged(int)), |
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74 SLOT(setZRotation(int))); |
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75 |
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76 createActions(); |
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77 createMenus(); |
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78 |
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79 QGridLayout *centralLayout = new QGridLayout; |
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80 centralLayout->addWidget(glWidgetArea, 0, 0); |
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81 centralLayout->addWidget(pixmapLabelArea, 0, 1); |
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82 centralLayout->addWidget(xSlider, 1, 0, 1, 2); |
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83 centralLayout->addWidget(ySlider, 2, 0, 1, 2); |
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84 centralLayout->addWidget(zSlider, 3, 0, 1, 2); |
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85 centralWidget->setLayout(centralLayout); |
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86 |
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87 xSlider->setValue(15 * 16); |
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88 ySlider->setValue(345 * 16); |
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89 zSlider->setValue(0 * 16); |
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90 |
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91 setWindowTitle(tr("Grabber")); |
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92 resize(400, 300); |
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93 } |
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94 |
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95 void MainWindow::renderIntoPixmap() |
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96 { |
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97 QSize size = getSize(); |
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98 if (size.isValid()) { |
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99 QPixmap pixmap = glWidget->renderPixmap(size.width(), size.height()); |
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100 setPixmap(pixmap); |
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101 } |
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102 } |
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103 |
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104 void MainWindow::grabFrameBuffer() |
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105 { |
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106 QImage image = glWidget->grabFrameBuffer(); |
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107 setPixmap(QPixmap::fromImage(image)); |
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108 } |
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109 |
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110 void MainWindow::clearPixmap() |
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111 { |
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112 setPixmap(QPixmap()); |
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113 } |
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114 |
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115 void MainWindow::about() |
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116 { |
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117 QMessageBox::about(this, tr("About Grabber"), |
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118 tr("The <b>Grabber</b> example demonstrates two approaches for " |
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119 "rendering OpenGL into a Qt pixmap.")); |
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120 } |
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121 |
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122 void MainWindow::createActions() |
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123 { |
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124 renderIntoPixmapAct = new QAction(tr("&Render into Pixmap..."), this); |
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125 renderIntoPixmapAct->setShortcut(tr("Ctrl+R")); |
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126 connect(renderIntoPixmapAct, SIGNAL(triggered()), |
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127 this, SLOT(renderIntoPixmap())); |
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128 |
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129 grabFrameBufferAct = new QAction(tr("&Grab Frame Buffer"), this); |
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130 grabFrameBufferAct->setShortcut(tr("Ctrl+G")); |
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131 connect(grabFrameBufferAct, SIGNAL(triggered()), |
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132 this, SLOT(grabFrameBuffer())); |
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133 |
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134 clearPixmapAct = new QAction(tr("&Clear Pixmap"), this); |
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135 clearPixmapAct->setShortcut(tr("Ctrl+L")); |
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136 connect(clearPixmapAct, SIGNAL(triggered()), this, SLOT(clearPixmap())); |
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137 |
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138 exitAct = new QAction(tr("E&xit"), this); |
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139 exitAct->setShortcuts(QKeySequence::Quit); |
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140 connect(exitAct, SIGNAL(triggered()), this, SLOT(close())); |
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141 |
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142 aboutAct = new QAction(tr("&About"), this); |
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143 connect(aboutAct, SIGNAL(triggered()), this, SLOT(about())); |
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144 |
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145 aboutQtAct = new QAction(tr("About &Qt"), this); |
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146 connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt())); |
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147 } |
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148 |
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149 void MainWindow::createMenus() |
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150 { |
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151 fileMenu = menuBar()->addMenu(tr("&File")); |
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152 fileMenu->addAction(renderIntoPixmapAct); |
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153 fileMenu->addAction(grabFrameBufferAct); |
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154 fileMenu->addAction(clearPixmapAct); |
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155 fileMenu->addSeparator(); |
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156 fileMenu->addAction(exitAct); |
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157 |
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158 helpMenu = menuBar()->addMenu(tr("&Help")); |
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159 helpMenu->addAction(aboutAct); |
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160 helpMenu->addAction(aboutQtAct); |
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161 } |
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162 |
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163 QSlider *MainWindow::createSlider(const char *changedSignal, |
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164 const char *setterSlot) |
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165 { |
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166 QSlider *slider = new QSlider(Qt::Horizontal); |
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167 slider->setRange(0, 360 * 16); |
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168 slider->setSingleStep(16); |
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169 slider->setPageStep(15 * 16); |
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170 slider->setTickInterval(15 * 16); |
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171 slider->setTickPosition(QSlider::TicksRight); |
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172 connect(slider, SIGNAL(valueChanged(int)), glWidget, setterSlot); |
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173 connect(glWidget, changedSignal, slider, SLOT(setValue(int))); |
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174 return slider; |
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175 } |
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176 |
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177 void MainWindow::setPixmap(const QPixmap &pixmap) |
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178 { |
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179 pixmapLabel->setPixmap(pixmap); |
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180 QSize size = pixmap.size(); |
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181 if (size - QSize(1, 0) == pixmapLabelArea->maximumViewportSize()) |
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182 size -= QSize(1, 0); |
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183 pixmapLabel->resize(size); |
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184 } |
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185 |
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186 QSize MainWindow::getSize() |
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187 { |
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188 bool ok; |
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189 QString text = QInputDialog::getText(this, tr("Grabber"), |
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190 tr("Enter pixmap size:"), |
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191 QLineEdit::Normal, |
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192 tr("%1 x %2").arg(glWidget->width()) |
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193 .arg(glWidget->height()), |
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194 &ok); |
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195 if (!ok) |
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196 return QSize(); |
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197 |
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198 QRegExp regExp(tr("([0-9]+) *x *([0-9]+)")); |
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199 if (regExp.exactMatch(text)) { |
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200 int width = regExp.cap(1).toInt(); |
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201 int height = regExp.cap(2).toInt(); |
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202 if (width > 0 && width < 2048 && height > 0 && height < 2048) |
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203 return QSize(width, height); |
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204 } |
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205 |
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206 return glWidget->size(); |
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207 } |