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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 demonstration applications 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 <QPainter> |
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43 #include <QApplication> |
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44 |
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45 #include "embeddedsvgviewer.h" |
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46 |
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47 |
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48 |
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49 EmbeddedSvgViewer::EmbeddedSvgViewer(const QString &filePath) |
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50 { |
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51 qApp->setStyleSheet(" QSlider:vertical { width: 50px; } \ |
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52 QSlider::groove:vertical { border: 1px solid black; border-radius: 3px; width: 6px; } \ |
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53 QSlider::handle:vertical { height: 25px; margin: 0 -22px; image: url(':/files/v-slider-handle.svg'); } \ |
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54 "); |
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55 |
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56 m_renderer = new QSvgRenderer(filePath); |
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57 m_imageSize = m_renderer->viewBox().size(); |
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58 |
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59 m_viewBoxCenter = (QPointF(m_imageSize.width() / qreal(2.0), m_imageSize.height() / qreal(2.0))); |
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60 |
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61 m_zoomSlider = new QSlider(Qt::Vertical, this); |
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62 m_zoomSlider->setMaximum(150); |
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63 m_zoomSlider->setMinimum(1); |
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64 |
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65 connect(m_zoomSlider, SIGNAL(valueChanged(int)), this, SLOT(setZoom(int))); |
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66 m_zoomSlider->setValue(100); |
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67 |
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68 m_quitButton = new QPushButton("Quit", this); |
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69 |
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70 connect(m_quitButton, SIGNAL(pressed()), QApplication::instance(), SLOT(quit())); |
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71 |
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72 if (m_renderer->animated()) |
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73 connect(m_renderer, SIGNAL(repaintNeeded()), this, SLOT(update())); |
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74 |
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75 } |
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76 |
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77 void EmbeddedSvgViewer::paintEvent(QPaintEvent *event) |
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78 { |
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79 Q_UNUSED(event) |
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80 QPainter painter(this); |
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81 m_renderer->setViewBox(m_viewBox); |
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82 m_renderer->render(&painter); |
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83 } |
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84 |
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85 |
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86 void EmbeddedSvgViewer::mouseMoveEvent ( QMouseEvent * event ) |
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87 { |
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88 int incX = int((event->globalX() - m_mousePress.x()) * m_imageScale); |
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89 int incY = int((event->globalY() - m_mousePress.y()) * m_imageScale); |
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90 |
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91 QPointF newCenter; |
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92 newCenter.setX(m_viewBoxCenterOnMousePress.x() - incX); |
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93 newCenter.setY(m_viewBoxCenterOnMousePress.y() - incY); |
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94 |
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95 QRectF newViewBox = getViewBox(newCenter); |
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96 |
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97 |
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98 // Do a bounded move on the horizontal: |
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99 if ( (newViewBox.left() >= m_viewBoxBounds.left()) && |
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100 (newViewBox.right() <= m_viewBoxBounds.right()) ) |
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101 { |
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102 m_viewBoxCenter.setX(newCenter.x()); |
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103 m_viewBox.setLeft(newViewBox.left()); |
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104 m_viewBox.setRight(newViewBox.right()); |
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105 } |
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106 |
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107 // do a bounded move on the vertical: |
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108 if ( (newViewBox.top() >= m_viewBoxBounds.top()) && |
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109 (newViewBox.bottom() <= m_viewBoxBounds.bottom()) ) |
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110 { |
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111 m_viewBoxCenter.setY(newCenter.y()); |
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112 m_viewBox.setTop(newViewBox.top()); |
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113 m_viewBox.setBottom(newViewBox.bottom()); |
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114 } |
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115 |
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116 update(); |
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117 } |
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118 |
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119 void EmbeddedSvgViewer::mousePressEvent ( QMouseEvent * event ) |
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120 { |
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121 m_viewBoxCenterOnMousePress = m_viewBoxCenter; |
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122 m_mousePress = event->globalPos(); |
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123 } |
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124 |
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125 |
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126 QRectF EmbeddedSvgViewer::getViewBox(QPointF viewBoxCenter) |
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127 { |
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128 QRectF result; |
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129 result.setLeft(viewBoxCenter.x() - (m_viewBoxSize.width() / 2)); |
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130 result.setTop(viewBoxCenter.y() - (m_viewBoxSize.height() / 2)); |
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131 result.setRight(viewBoxCenter.x() + (m_viewBoxSize.width() / 2)); |
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132 result.setBottom(viewBoxCenter.y() + (m_viewBoxSize.height() / 2)); |
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133 return result; |
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134 } |
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135 |
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136 void EmbeddedSvgViewer::updateImageScale() |
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137 { |
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138 m_imageScale = qMax( (qreal)m_imageSize.width() / (qreal)width(), |
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139 (qreal)m_imageSize.height() / (qreal)height())*m_zoomLevel; |
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140 |
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141 m_viewBoxSize.setWidth((qreal)width() * m_imageScale); |
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142 m_viewBoxSize.setHeight((qreal)height() * m_imageScale); |
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143 } |
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144 |
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145 |
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146 void EmbeddedSvgViewer::resizeEvent ( QResizeEvent * /* event */ ) |
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147 { |
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148 qreal origZoom = m_zoomLevel; |
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149 |
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150 // Get the new bounds: |
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151 m_zoomLevel = 1.0; |
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152 updateImageScale(); |
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153 m_viewBoxBounds = getViewBox(QPointF(m_imageSize.width() / 2.0, m_imageSize.height() / 2.0)); |
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154 |
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155 m_zoomLevel = origZoom; |
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156 updateImageScale(); |
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157 m_viewBox = getViewBox(m_viewBoxCenter); |
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158 |
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159 QRect sliderRect; |
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160 sliderRect.setLeft(width() - m_zoomSlider->sizeHint().width()); |
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161 sliderRect.setRight(width()); |
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162 sliderRect.setTop(height()/4); |
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163 sliderRect.setBottom(height() - (height()/4)); |
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164 m_zoomSlider->setGeometry(sliderRect); |
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165 } |
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166 |
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167 |
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168 void EmbeddedSvgViewer::setZoom(int newZoom) |
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169 { |
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170 m_zoomLevel = qreal(newZoom) / qreal(100); |
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171 |
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172 updateImageScale(); |
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173 m_viewBox = getViewBox(m_viewBoxCenter); |
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174 |
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175 update(); |
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176 } |
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177 |
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178 |
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179 |
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180 |
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181 |