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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 "scribblewidget.h" |
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43 |
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44 ScribbleWidget::ScribbleWidget(QWidget *parent) |
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45 : QWidget(parent) |
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46 { |
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47 scribbling = false; |
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48 } |
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49 |
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50 void ScribbleWidget::resizeEvent(QResizeEvent *e) |
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51 { |
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52 image = QImage(e->size(), QImage::Format_RGB32); |
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53 image.fill(QColor(Qt::white).rgb()); |
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54 } |
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55 |
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56 void ScribbleWidget::mousePressEvent(QMouseEvent *event) |
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57 { |
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58 if (event->button() != Qt::LeftButton) |
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59 return; |
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60 |
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61 lastPoint = event->pos(); |
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62 scribbling = true; |
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63 } |
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64 |
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65 void ScribbleWidget::mouseMoveEvent(QMouseEvent *event) |
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66 { |
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67 if ((event->buttons() & Qt::LeftButton) && scribbling) |
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68 drawLineTo(event->pos()); |
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69 } |
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70 |
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71 void ScribbleWidget::mouseReleaseEvent(QMouseEvent *event) |
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72 { |
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73 if (event->button() == Qt::LeftButton && scribbling) { |
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74 drawLineTo(event->pos()); |
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75 scribbling = false; |
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76 } |
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77 } |
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78 |
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79 void ScribbleWidget::paintEvent(QPaintEvent *) |
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80 { |
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81 QPainter painter(this); |
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82 painter.drawImage(QPoint(0, 0), image); |
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83 } |
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84 |
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85 void ScribbleWidget::drawLineTo(const QPoint &endPoint) |
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86 { |
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87 QPainter painter(&image); |
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88 painter.setPen(QPen(Qt::blue, 1, Qt::SolidLine, |
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89 Qt::RoundCap, Qt::RoundJoin)); |
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90 painter.drawLine(lastPoint, endPoint); |
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91 update(); |
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92 lastPoint = endPoint; |
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93 } |