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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 Qt3Support module 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 "private/qpicture_p.h" |
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43 #include "qfile.h" |
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44 #include "qpainter.h" |
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45 #include "q3picture.h" |
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46 #include "q3paintengine_svg_p.h" |
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47 |
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48 QT_BEGIN_NAMESPACE |
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49 |
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50 class Q3SvgDevice : public QPaintDevice |
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51 { |
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52 public: |
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53 Q3SvgDevice() : QPaintDevice() {} |
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54 bool load(QIODevice *dev) { return svgEngine.load(dev); } |
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55 bool save(const QString &fileName) { return svgEngine.save(fileName); } |
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56 bool save(QIODevice *dev) { return svgEngine.save(dev); } |
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57 void setBoundingRect(const QRect &rect) { svgEngine.setBoundingRect(rect); } |
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58 QRect boundingRect() const { return svgEngine.boundingRect(); } |
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59 QPaintEngine *paintEngine() const { return (QPaintEngine *)&svgEngine; } |
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60 bool play(QPainter *p) { return svgEngine.play(p); } |
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61 int metric(PaintDeviceMetric m) const; |
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62 |
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63 private: |
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64 Q3SVGPaintEngine svgEngine; |
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65 }; |
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66 |
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67 int Q3SvgDevice::metric(PaintDeviceMetric m) const |
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68 { |
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69 int val; |
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70 QRect br = svgEngine.boundingRect(); |
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71 switch (m) { |
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72 case PdmWidth: |
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73 val = br.width(); |
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74 break; |
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75 case PdmHeight: |
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76 val = br.height(); |
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77 break; |
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78 case PdmWidthMM: |
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79 val = int(25.4/72.0*br.width()); |
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80 break; |
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81 case PdmHeightMM: |
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82 val = int(25.4/72.0*br.height()); |
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83 break; |
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84 case PdmDpiX: |
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85 val = 72; |
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86 break; |
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87 case PdmDpiY: |
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88 val = 72; |
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89 break; |
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90 case PdmNumColors: |
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91 val = 16777216; |
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92 break; |
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93 case PdmDepth: |
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94 val = 24; |
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95 break; |
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96 default: |
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97 val = 0; |
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98 qWarning("Q3SvgDevice::metric: Invalid metric command"); |
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99 } |
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100 return val; |
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101 } |
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102 |
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103 /*! |
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104 \class Q3Picture |
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105 \brief The Q3Picture class is a paint device that records and |
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106 replays Q3Painter commands. |
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107 |
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108 \compat |
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109 |
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110 Q3Picture can also read and write SVG (Scalable Vector Graphics) |
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111 files, a \l{http://www.w3.org/Graphics/SVG/} {W3C} XML format. |
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112 Note that when using the load() and save() functions to read and |
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113 write SVG files, the format must be specified. |
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114 |
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115 \sa QPicture |
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116 */ |
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117 |
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118 /*! |
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119 \fn Q3Picture::Q3Picture() |
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120 |
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121 Constructs a Q3Picture. |
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122 */ |
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123 |
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124 /*! |
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125 \fn Q3Picture::Q3Picture(const QPicture &other) |
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126 |
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127 Constructs a copy of \a other. |
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128 */ |
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129 |
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130 /*! |
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131 \overload |
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132 Loads the picture in the specified \a format from a file with the |
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133 given \a fileName. Returns true if the file is loaded successfully; |
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134 otherwise returns false. |
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135 */ |
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136 bool Q3Picture::load(const QString &fileName, const char *format) |
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137 { |
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138 QFile f(fileName); |
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139 if (!f.open(QIODevice::ReadOnly)) |
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140 return false; |
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141 return load(&f, format); |
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142 } |
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143 |
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144 /*! |
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145 \fn bool Q3Picture::load(QIODevice *device, const char *format) |
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146 |
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147 Loads the picture in the specified \a format from the given \a device. |
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148 Returns true if the file is loaded successfully; otherwise returns false. |
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149 |
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150 Note that when using the load() function to read SVG files, the |
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151 format must be specified. For example: |
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152 |
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153 \snippet doc/src/snippets/code/src_qt3support_painting_q3picture.cpp 0 |
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154 |
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155 \sa save() |
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156 */ |
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157 bool Q3Picture::load(QIODevice *dev, const char *format) |
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158 { |
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159 if (qstrcmp(format, "svg" ) == 0) { |
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160 Q3SvgDevice svg; |
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161 if (!svg.load(dev)) |
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162 return false; |
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163 QPainter p(this); |
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164 p.setRenderHint(QPainter::Antialiasing); |
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165 bool b = svg.play(&p); |
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166 d_func()->brect = svg.boundingRect(); |
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167 return b; |
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168 } |
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169 return QPicture::load(dev, format); |
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170 } |
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171 |
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172 /*! |
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173 \overload |
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174 Saves the picture in the specified \a format to the file with the |
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175 given \a fileName. |
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176 |
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177 \sa load() |
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178 */ |
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179 bool Q3Picture::save(const QString &fileName, const char *format) |
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180 { |
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181 if (paintingActive()) { |
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182 qWarning("Q3Picture::save: still being painted on. " |
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183 "Call QPainter::end() first"); |
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184 return false; |
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185 } |
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186 |
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187 // identical to QIODevice* code below but the file name |
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188 // makes a difference when it comes to saving pixmaps |
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189 if (qstricmp( format, "svg") == 0) { |
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190 Q3SvgDevice svg; |
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191 QPainter p(&svg); |
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192 if (!play(&p)) |
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193 return false; |
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194 svg.setBoundingRect(boundingRect()); |
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195 return svg.save(fileName); |
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196 } |
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197 |
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198 return QPicture::save(fileName, format); |
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199 } |
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200 |
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201 /*! |
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202 \fn bool Q3Picture::save(QIODevice *device, const char *format) |
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203 |
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204 Saves the picture in the specified \a format to the given \a device. |
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205 Returns true if the save is successful. Returns false if, for |
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206 example, the picture is still being painted, i.e., QPainter::end() |
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207 has not yet been called. |
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208 |
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209 Note that when using the save() function to save SVG files, the |
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210 format must be specified. For example: |
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211 |
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212 \snippet doc/src/snippets/code/src_qt3support_painting_q3picture.cpp 1 |
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213 |
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214 \sa load() |
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215 */ |
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216 bool Q3Picture::save(QIODevice *dev, const char *format) |
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217 { |
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218 if (paintingActive()) { |
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219 qWarning("Q3Picture::save: still being painted on. " |
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220 "Call QPainter::end() first"); |
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221 return false; |
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222 } |
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223 |
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224 if (qstricmp(format, "svg") == 0) { |
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225 Q3SvgDevice svg; |
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226 QPainter p(&svg); |
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227 if (!play(&p)) |
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228 return false; |
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229 svg.setBoundingRect(boundingRect()); |
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230 return svg.save(dev); |
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231 } |
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232 return QPicture::save(dev, format); |
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233 } |
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234 |
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235 QT_END_NAMESPACE |