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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 <math.h> |
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46 |
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47 #include "glwidget.h" |
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48 #include "qtlogo.h" |
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49 |
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50 #ifndef GL_MULTISAMPLE |
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51 #define GL_MULTISAMPLE 0x809D |
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52 #endif |
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53 |
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54 //! [0] |
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55 GLWidget::GLWidget(QWidget *parent) |
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56 : QGLWidget(QGLFormat(QGL::SampleBuffers), parent) |
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57 { |
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58 logo = 0; |
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59 xRot = 0; |
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60 yRot = 0; |
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61 zRot = 0; |
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62 |
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63 qtGreen = QColor::fromCmykF(0.40, 0.0, 1.0, 0.0); |
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64 qtPurple = QColor::fromCmykF(0.39, 0.39, 0.0, 0.0); |
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65 } |
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66 //! [0] |
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67 |
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68 //! [1] |
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69 GLWidget::~GLWidget() |
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70 { |
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71 } |
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72 //! [1] |
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73 |
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74 //! [2] |
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75 QSize GLWidget::minimumSizeHint() const |
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76 { |
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77 return QSize(50, 50); |
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78 } |
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79 //! [2] |
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80 |
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81 //! [3] |
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82 QSize GLWidget::sizeHint() const |
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83 //! [3] //! [4] |
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84 { |
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85 return QSize(400, 400); |
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86 } |
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87 //! [4] |
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88 |
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89 static void qNormalizeAngle(int &angle) |
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90 { |
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91 while (angle < 0) |
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92 angle += 360 * 16; |
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93 while (angle > 360 * 16) |
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94 angle -= 360 * 16; |
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95 } |
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96 |
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97 //! [5] |
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98 void GLWidget::setXRotation(int angle) |
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99 { |
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100 qNormalizeAngle(angle); |
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101 if (angle != xRot) { |
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102 xRot = angle; |
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103 emit xRotationChanged(angle); |
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104 updateGL(); |
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105 } |
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106 } |
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107 //! [5] |
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108 |
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109 void GLWidget::setYRotation(int angle) |
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110 { |
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111 qNormalizeAngle(angle); |
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112 if (angle != yRot) { |
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113 yRot = angle; |
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114 emit yRotationChanged(angle); |
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115 updateGL(); |
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116 } |
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117 } |
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118 |
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119 void GLWidget::setZRotation(int angle) |
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120 { |
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121 qNormalizeAngle(angle); |
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122 if (angle != zRot) { |
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123 zRot = angle; |
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124 emit zRotationChanged(angle); |
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125 updateGL(); |
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126 } |
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127 } |
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128 |
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129 //! [6] |
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130 void GLWidget::initializeGL() |
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131 { |
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132 qglClearColor(qtPurple.dark()); |
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133 |
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134 logo = new QtLogo(this, 64); |
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135 logo->setColor(qtGreen.dark()); |
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136 |
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137 glEnable(GL_DEPTH_TEST); |
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138 glEnable(GL_CULL_FACE); |
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139 glShadeModel(GL_SMOOTH); |
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140 glEnable(GL_LIGHTING); |
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141 glEnable(GL_LIGHT0); |
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142 glEnable(GL_MULTISAMPLE); |
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143 static GLfloat lightPosition[4] = { 0.5, 5.0, 7.0, 1.0 }; |
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144 glLightfv(GL_LIGHT0, GL_POSITION, lightPosition); |
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145 } |
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146 //! [6] |
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147 |
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148 //! [7] |
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149 void GLWidget::paintGL() |
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150 { |
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151 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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152 glLoadIdentity(); |
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153 glTranslatef(0.0, 0.0, -10.0); |
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154 glRotatef(xRot / 16.0, 1.0, 0.0, 0.0); |
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155 glRotatef(yRot / 16.0, 0.0, 1.0, 0.0); |
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156 glRotatef(zRot / 16.0, 0.0, 0.0, 1.0); |
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157 logo->draw(); |
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158 } |
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159 //! [7] |
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160 |
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161 //! [8] |
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162 void GLWidget::resizeGL(int width, int height) |
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163 { |
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164 int side = qMin(width, height); |
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165 glViewport((width - side) / 2, (height - side) / 2, side, side); |
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166 |
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167 glMatrixMode(GL_PROJECTION); |
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168 glLoadIdentity(); |
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169 #ifdef QT_OPENGL_ES_1 |
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170 glOrthof(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0); |
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171 #else |
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172 glOrtho(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0); |
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173 #endif |
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174 glMatrixMode(GL_MODELVIEW); |
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175 } |
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176 //! [8] |
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177 |
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178 //! [9] |
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179 void GLWidget::mousePressEvent(QMouseEvent *event) |
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180 { |
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181 lastPos = event->pos(); |
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182 } |
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183 //! [9] |
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184 |
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185 //! [10] |
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186 void GLWidget::mouseMoveEvent(QMouseEvent *event) |
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187 { |
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188 int dx = event->x() - lastPos.x(); |
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189 int dy = event->y() - lastPos.y(); |
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190 |
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191 if (event->buttons() & Qt::LeftButton) { |
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192 setXRotation(xRot + 8 * dy); |
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193 setYRotation(yRot + 8 * dx); |
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194 } else if (event->buttons() & Qt::RightButton) { |
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195 setXRotation(xRot + 8 * dy); |
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196 setZRotation(zRot + 8 * dx); |
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197 } |
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198 lastPos = event->pos(); |
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199 } |
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200 //! [10] |