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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 #include <math.h> |
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44 |
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45 #include "starrating.h" |
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46 |
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47 const int PaintingScaleFactor = 20; |
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48 |
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49 //! [0] |
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50 StarRating::StarRating(int starCount, int maxStarCount) |
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51 { |
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52 myStarCount = starCount; |
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53 myMaxStarCount = maxStarCount; |
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54 |
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55 starPolygon << QPointF(1.0, 0.5); |
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56 for (int i = 1; i < 5; ++i) |
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57 starPolygon << QPointF(0.5 + 0.5 * cos(0.8 * i * 3.14), |
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58 0.5 + 0.5 * sin(0.8 * i * 3.14)); |
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59 |
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60 diamondPolygon << QPointF(0.4, 0.5) << QPointF(0.5, 0.4) |
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61 << QPointF(0.6, 0.5) << QPointF(0.5, 0.6) |
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62 << QPointF(0.4, 0.5); |
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63 } |
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64 //! [0] |
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65 |
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66 //! [1] |
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67 QSize StarRating::sizeHint() const |
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68 { |
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69 return PaintingScaleFactor * QSize(myMaxStarCount, 1); |
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70 } |
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71 //! [1] |
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72 |
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73 //! [2] |
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74 void StarRating::paint(QPainter *painter, const QRect &rect, |
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75 const QPalette &palette, EditMode mode) const |
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76 { |
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77 painter->save(); |
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78 |
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79 painter->setRenderHint(QPainter::Antialiasing, true); |
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80 painter->setPen(Qt::NoPen); |
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81 |
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82 if (mode == Editable) { |
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83 painter->setBrush(palette.highlight()); |
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84 } else { |
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85 painter->setBrush(palette.foreground()); |
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86 } |
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87 |
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88 int yOffset = (rect.height() - PaintingScaleFactor) / 2; |
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89 painter->translate(rect.x(), rect.y() + yOffset); |
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90 painter->scale(PaintingScaleFactor, PaintingScaleFactor); |
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91 |
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92 for (int i = 0; i < myMaxStarCount; ++i) { |
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93 if (i < myStarCount) { |
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94 painter->drawPolygon(starPolygon, Qt::WindingFill); |
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95 } else if (mode == Editable) { |
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96 painter->drawPolygon(diamondPolygon, Qt::WindingFill); |
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97 } |
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98 painter->translate(1.0, 0.0); |
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99 } |
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100 |
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101 painter->restore(); |
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102 } |
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103 //! [2] |