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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 |
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44 #include "renderarea.h" |
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45 |
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46 //! [0] |
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47 RenderArea::RenderArea(QWidget *parent) |
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48 : QWidget(parent) |
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49 { |
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50 QFont newFont = font(); |
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51 newFont.setPixelSize(12); |
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52 setFont(newFont); |
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53 |
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54 QFontMetrics fontMetrics(newFont); |
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55 xBoundingRect = fontMetrics.boundingRect(tr("x")); |
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56 yBoundingRect = fontMetrics.boundingRect(tr("y")); |
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57 } |
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58 //! [0] |
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59 |
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60 //! [1] |
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61 void RenderArea::setOperations(const QList<Operation> &operations) |
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62 { |
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63 this->operations = operations; |
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64 update(); |
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65 } |
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66 //! [1] |
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67 |
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68 //! [2] |
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69 void RenderArea::setShape(const QPainterPath &shape) |
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70 { |
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71 this->shape = shape; |
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72 update(); |
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73 } |
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74 //! [2] |
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75 |
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76 //! [3] |
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77 QSize RenderArea::minimumSizeHint() const |
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78 { |
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79 return QSize(182, 182); |
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80 } |
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81 //! [3] |
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82 |
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83 //! [4] |
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84 QSize RenderArea::sizeHint() const |
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85 { |
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86 return QSize(232, 232); |
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87 } |
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88 //! [4] |
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89 |
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90 //! [5] |
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91 void RenderArea::paintEvent(QPaintEvent *event) |
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92 { |
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93 QPainter painter(this); |
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94 painter.setRenderHint(QPainter::Antialiasing); |
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95 painter.fillRect(event->rect(), QBrush(Qt::white)); |
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96 |
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97 painter.translate(66, 66); |
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98 //! [5] |
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99 |
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100 //! [6] |
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101 painter.save(); |
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102 transformPainter(painter); |
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103 drawShape(painter); |
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104 painter.restore(); |
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105 //! [6] |
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106 |
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107 //! [7] |
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108 drawOutline(painter); |
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109 //! [7] |
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110 |
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111 //! [8] |
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112 transformPainter(painter); |
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113 drawCoordinates(painter); |
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114 } |
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115 //! [8] |
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116 |
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117 //! [9] |
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118 void RenderArea::drawCoordinates(QPainter &painter) |
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119 { |
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120 painter.setPen(Qt::red); |
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121 |
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122 painter.drawLine(0, 0, 50, 0); |
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123 painter.drawLine(48, -2, 50, 0); |
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124 painter.drawLine(48, 2, 50, 0); |
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125 painter.drawText(60 - xBoundingRect.width() / 2, |
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126 0 + xBoundingRect.height() / 2, tr("x")); |
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127 |
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128 painter.drawLine(0, 0, 0, 50); |
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129 painter.drawLine(-2, 48, 0, 50); |
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130 painter.drawLine(2, 48, 0, 50); |
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131 painter.drawText(0 - yBoundingRect.width() / 2, |
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132 60 + yBoundingRect.height() / 2, tr("y")); |
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133 } |
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134 //! [9] |
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135 |
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136 //! [10] |
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137 void RenderArea::drawOutline(QPainter &painter) |
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138 { |
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139 painter.setPen(Qt::darkGreen); |
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140 painter.setPen(Qt::DashLine); |
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141 painter.setBrush(Qt::NoBrush); |
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142 painter.drawRect(0, 0, 100, 100); |
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143 } |
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144 //! [10] |
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145 |
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146 //! [11] |
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147 void RenderArea::drawShape(QPainter &painter) |
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148 { |
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149 painter.fillPath(shape, Qt::blue); |
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150 } |
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151 //! [11] |
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152 |
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153 //! [12] |
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154 void RenderArea::transformPainter(QPainter &painter) |
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155 { |
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156 for (int i = 0; i < operations.size(); ++i) { |
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157 switch (operations[i]) { |
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158 case Translate: |
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159 painter.translate(50, 50); |
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160 break; |
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161 case Scale: |
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162 painter.scale(0.75, 0.75); |
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163 break; |
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164 case Rotate: |
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165 painter.rotate(60); |
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166 break; |
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167 case NoTransformation: |
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168 default: |
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169 ; |
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170 } |
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171 } |
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172 } |
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173 //! [12] |