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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 QtSvg 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 "qsvgwidget.h" |
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43 |
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44 #ifndef QT_NO_SVGWIDGET |
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45 |
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46 #include "qsvgrenderer.h" |
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47 |
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48 #include "qpainter.h" |
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49 #include "private/qwidget_p.h" |
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50 |
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51 QT_BEGIN_NAMESPACE |
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52 |
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53 /*! |
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54 \class QSvgWidget |
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55 \ingroup painting |
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56 |
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57 \brief The QSvgWidget class provides a widget that is used to display the contents of |
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58 Scalable Vector Graphics (SVG) files. |
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59 \since 4.1 |
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60 |
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61 This class enables developers to display SVG drawings alongside standard widgets, and |
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62 is used in much the same way as QLabel is used for displaying text and bitmap images. |
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63 |
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64 Since QSvgWidget is a subclass of QWidget, SVG drawings are rendered using the properties |
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65 of the display. More control can be exercised over the rendering process with the |
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66 QSvgRenderer class, as this can be used to paint onto other paint devices, such as QImage |
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67 and QGLWidget. The renderer used by the widget can be obtained with the renderer() |
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68 function. |
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69 |
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70 Each QSvgWidget can be constructed with the file name of a SVG file, or they can be |
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71 constructed without a specific file to render and one can be supplied later. The load() |
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72 functions provide two different ways to load an SVG file: they accept either the file name |
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73 of an SVG file or a QByteArray containing the serialized XML representation of an SVG file. |
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74 |
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75 By default, the widget provides a size hint to reflect the size of the drawing that it |
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76 displays. If no data has been loaded, the widget provides the default QWidget size hint. |
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77 Subclass this class and reimplement sizeHint() if you need to customize this behavior. |
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78 |
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79 \sa QSvgRenderer, {QtSvg Module}, QPicture |
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80 */ |
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81 |
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82 class QSvgWidgetPrivate : public QWidgetPrivate |
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83 { |
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84 Q_DECLARE_PUBLIC(QSvgWidget) |
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85 public: |
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86 QSvgRenderer *renderer; |
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87 }; |
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88 |
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89 /*! |
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90 Constructs a new SVG display widget with the given \a parent. |
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91 */ |
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92 QSvgWidget::QSvgWidget(QWidget *parent) |
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93 : QWidget(*new QSvgWidgetPrivate, parent, 0) |
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94 { |
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95 d_func()->renderer = new QSvgRenderer(this); |
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96 QObject::connect(d_func()->renderer, SIGNAL(repaintNeeded()), |
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97 this, SLOT(update())); |
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98 } |
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99 |
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100 /*! |
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101 Constructs a new SVG display widget with the given \a parent and loads the contents |
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102 of the specified \a file. |
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103 */ |
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104 QSvgWidget::QSvgWidget(const QString &file, QWidget *parent) |
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105 : QWidget(*new QSvgWidgetPrivate, parent, 0) |
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106 { |
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107 d_func()->renderer = new QSvgRenderer(file, this); |
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108 QObject::connect(d_func()->renderer, SIGNAL(repaintNeeded()), |
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109 this, SLOT(update())); |
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110 } |
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111 |
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112 /*! |
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113 Destroys the widget. |
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114 */ |
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115 QSvgWidget::~QSvgWidget() |
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116 { |
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117 |
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118 } |
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119 |
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120 /*! |
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121 Returns the renderer used to display the contents of the widget. |
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122 */ |
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123 QSvgRenderer * QSvgWidget::renderer() const |
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124 { |
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125 Q_D(const QSvgWidget); |
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126 return d->renderer; |
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127 } |
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128 |
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129 |
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130 /*! |
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131 \reimp |
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132 */ |
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133 QSize QSvgWidget::sizeHint() const |
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134 { |
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135 Q_D(const QSvgWidget); |
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136 if (d->renderer->isValid()) |
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137 return d->renderer->defaultSize(); |
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138 else |
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139 return QSize(128, 64); |
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140 } |
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141 |
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142 |
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143 /*! |
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144 \reimp |
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145 */ |
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146 void QSvgWidget::paintEvent(QPaintEvent *) |
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147 { |
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148 Q_D(QSvgWidget); |
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149 QPainter p(this); |
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150 d->renderer->render(&p); |
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151 } |
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152 |
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153 /*! |
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154 Loads the contents of the specified SVG \a file and updates the widget. |
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155 */ |
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156 void QSvgWidget::load(const QString &file) |
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157 { |
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158 Q_D(const QSvgWidget); |
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159 d->renderer->load(file); |
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160 } |
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161 |
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162 /*! |
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163 Loads the specified SVG format \a contents and updates the widget. |
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164 */ |
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165 void QSvgWidget::load(const QByteArray &contents) |
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166 { |
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167 Q_D(const QSvgWidget); |
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168 d->renderer->load(contents); |
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169 } |
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170 |
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171 QT_END_NAMESPACE |
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172 |
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173 #endif // QT_NO_SVGWIDGET |