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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 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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5 ** |
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6 ** This file is part of the examples of the Qt Toolkit. |
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7 ** |
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8 ** $QT_BEGIN_LICENSE:LGPL$ |
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9 ** No Commercial Usage |
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10 ** This file contains pre-release code and may not be distributed. |
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11 ** You may use this file in accordance with the terms and conditions |
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12 ** contained in the either Technology Preview License Agreement or the |
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13 ** Beta Release License Agreement. |
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14 ** |
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15 ** GNU Lesser General Public License Usage |
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16 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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17 ** General Public License version 2.1 as published by the Free Software |
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18 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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19 ** packaging of this file. Please review the following information to |
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20 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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21 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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22 ** |
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23 ** In addition, as a special exception, Nokia gives you certain |
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24 ** additional rights. These rights are described in the Nokia Qt LGPL |
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25 ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this |
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26 ** package. |
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27 ** |
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28 ** GNU General Public License Usage |
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29 ** Alternatively, this file may be used under the terms of the GNU |
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30 ** General Public License version 3.0 as published by the Free Software |
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31 ** Foundation and appearing in the file LICENSE.GPL included in the |
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32 ** packaging of this file. Please review the following information to |
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33 ** ensure the GNU General Public License version 3.0 requirements will be |
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34 ** met: http://www.gnu.org/copyleft/gpl.html. |
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35 ** |
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36 ** If you are unsure which license is appropriate for your use, please |
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37 ** contact the sales department at http://qt.nokia.com/contact. |
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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 <QSvgRenderer> |
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44 |
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45 #if (QT_VERSION >= 0x040600) |
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46 #include <QGraphicsEffect> |
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47 #endif |
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48 |
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49 #include "iconitem.h" |
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50 |
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51 IconItem::IconItem(const QString &filename, QGraphicsItem *parent) |
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52 : GvbWidget(parent) |
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53 , m_filename(filename) |
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54 , m_rotation(0.0) |
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55 #if (QT_VERSION >= 0x040600) |
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56 , m_opacityEffect(0) |
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57 #endif |
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58 , m_smoothTransformation(false) |
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59 { |
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60 setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred); |
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61 setContentsMargins(0,0,0,0); |
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62 setPreferredSize(58,58); |
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63 } |
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64 |
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65 IconItem::~IconItem() |
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66 { |
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67 } |
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68 |
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69 void IconItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) |
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70 { |
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71 Q_UNUSED(option); |
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72 Q_UNUSED(widget); |
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73 |
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74 reload(); |
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75 |
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76 const QPointF c = boundingRect().center(); |
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77 painter->translate(c.x(), c.y()); |
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78 painter->rotate(m_rotation); |
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79 painter->translate(-c.x(), -c.y()); |
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80 |
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81 if (m_smoothTransformation) |
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82 painter->setRenderHints(QPainter::SmoothPixmapTransform); |
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83 |
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84 painter->drawPixmap(0,0, m_pixmap); |
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85 } |
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86 |
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87 QSizeF IconItem::sizeHint(Qt::SizeHint which, |
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88 const QSizeF &constraint) const |
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89 { |
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90 switch (which) |
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91 { |
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92 case Qt::MinimumSize: |
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93 case Qt::PreferredSize: |
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94 case Qt::MaximumSize: |
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95 return m_pixmap.size(); |
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96 |
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97 default: |
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98 return GvbWidget::sizeHint(which, constraint); |
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99 } |
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100 } |
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101 |
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102 void IconItem::reload() |
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103 { |
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104 const QSize iconSize = size().toSize(); |
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105 if (iconSize.width() == 0 || iconSize.height() == 0) |
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106 return; |
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107 |
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108 const QString key = m_filename+QString::number(iconSize.width())+QString::number(iconSize.height()); |
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109 if (QPixmapCache::find(key, m_pixmap)) |
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110 return; |
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111 |
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112 if (m_filename.endsWith(".svg", Qt::CaseInsensitive)) |
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113 { |
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114 m_pixmap = QPixmap(iconSize); |
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115 m_pixmap.fill(Qt::transparent); |
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116 QSvgRenderer doc(m_filename); |
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117 QPainter painter(&m_pixmap); |
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118 painter.setViewport(0, 0, iconSize.width(), iconSize.height()); |
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119 doc.render(&painter); |
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120 } |
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121 else |
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122 { |
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123 m_pixmap = QPixmap(m_filename).scaled(iconSize); |
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124 } |
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125 |
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126 QPixmapCache::insert(key, m_pixmap); |
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127 updateGeometry(); |
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128 } |
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129 |
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130 QString IconItem::fileName() const |
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131 { |
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132 return m_filename; |
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133 } |
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134 |
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135 void IconItem::setFileName(const QString &filename) |
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136 { |
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137 if( m_filename != filename) { |
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138 m_filename = filename; |
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139 reload(); |
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140 } |
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141 } |
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142 |
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143 #if (QT_VERSION >= 0x040600) |
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144 void IconItem::setOpacityEffectEnabled(const bool enable) |
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145 { |
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146 if (!m_opacityEffect) |
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147 { |
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148 QRadialGradient gradient(0.5, 0.5, 1.0); |
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149 gradient.setCoordinateMode(QGradient::ObjectBoundingMode); |
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150 gradient.setColorAt(0.0, QColor(0,0,0, 255)); |
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151 gradient.setColorAt(0.46, QColor(0,0,0, 255)); |
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152 gradient.setColorAt(0.62, QColor(0,0,0, 0)); |
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153 |
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154 m_opacityEffect = new QGraphicsOpacityEffect; |
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155 m_opacityEffect->setOpacityMask(gradient); |
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156 m_opacityEffect->setOpacity(1.0); |
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157 this->setGraphicsEffect(m_opacityEffect); |
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158 } |
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159 m_opacityEffect->setEnabled(enable); |
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160 } |
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161 |
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162 bool IconItem::isOpacityEffectEnabled() const |
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163 { |
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164 if (m_opacityEffect) |
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165 return m_opacityEffect->isEnabled(); |
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166 |
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167 return false; |
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168 } |
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169 #endif |