1 | /****************************************************************************
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2 | **
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3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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4 | ** All rights reserved.
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5 | ** Contact: Nokia Corporation ([email protected])
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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 | ** Commercial Usage
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11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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12 | ** accordance with the Qt Commercial License Agreement provided with the
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13 | ** Software or, alternatively, in accordance with the terms contained in
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14 | ** a written agreement between you and Nokia.
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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 | ** 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 have questions regarding the use of this file, please contact
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37 | ** Nokia at [email protected].
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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 "blurpicker.h"
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43 |
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44 | #include <QtGui>
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45 |
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46 | #include "blureffect.h"
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47 |
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48 | #ifndef M_PI
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49 | #define M_PI 3.14159265358979323846
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50 | #endif
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51 |
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52 | BlurPicker::BlurPicker(QWidget *parent): QGraphicsView(parent), m_index(0.0), m_animation(this, "index")
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53 | {
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54 | setBackgroundBrush(QPixmap(":/images/background.jpg"));
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55 | setScene(new QGraphicsScene(this));
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56 |
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57 | setupScene();
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58 | setIndex(0);
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59 |
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60 | m_animation.setDuration(400);
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61 | m_animation.setEasingCurve(QEasingCurve::InOutSine);
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62 |
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63 | setRenderHint(QPainter::Antialiasing, true);
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64 | setFrameStyle(QFrame::NoFrame);
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65 | }
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66 |
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67 | qreal BlurPicker::index() const
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68 | {
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69 | return m_index;
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70 | }
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71 |
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72 | void BlurPicker::setIndex(qreal index)
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73 | {
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74 | m_index = index;
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75 |
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76 | qreal baseline = 0;
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77 | for (int i = 0; i < m_icons.count(); ++i) {
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78 | QGraphicsItem *icon = m_icons[i];
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79 | qreal a = ((i + m_index) * 2 * M_PI) / m_icons.count();
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80 | qreal xs = 170 * sin(a);
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81 | qreal ys = 100 * cos(a);
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82 | QPointF pos(xs, ys);
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83 | pos = QTransform().rotate(-20).map(pos);
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84 | pos -= QPointF(40, 40);
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85 | icon->setPos(pos);
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86 | baseline = qMax(baseline, ys);
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87 | static_cast<BlurEffect *>(icon->graphicsEffect())->setBaseLine(baseline);
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88 | }
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89 |
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90 | scene()->update();
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91 | }
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92 |
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93 | void BlurPicker::setupScene()
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94 | {
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95 | scene()->setSceneRect(-200, -120, 400, 240);
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96 |
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97 | QStringList names;
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98 | names << ":/images/accessories-calculator.png";
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99 | names << ":/images/accessories-text-editor.png";
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100 | names << ":/images/help-browser.png";
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101 | names << ":/images/internet-group-chat.png";
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102 | names << ":/images/internet-mail.png";
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103 | names << ":/images/internet-web-browser.png";
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104 | names << ":/images/office-calendar.png";
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105 | names << ":/images/system-users.png";
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106 |
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107 | for (int i = 0; i < names.count(); i++) {
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108 | QPixmap pixmap(names[i]);
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109 | QGraphicsPixmapItem *icon = scene()->addPixmap(pixmap);
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110 | icon->setZValue(1);
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111 | icon->setGraphicsEffect(new BlurEffect(icon));
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112 | m_icons << icon;
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113 | }
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114 |
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115 | QGraphicsPixmapItem *bg = scene()->addPixmap(QPixmap(":/images/background.jpg"));
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116 | bg->setZValue(0);
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117 | bg->setPos(-200, -150);
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118 | }
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119 |
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120 | void BlurPicker::keyPressEvent(QKeyEvent *event)
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121 | {
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122 | int delta = 0;
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123 | switch (event->key())
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124 | {
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125 | case Qt::Key_Left:
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126 | delta = -1;
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127 | break;
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128 | case Qt::Key_Right:
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129 | delta = 1;
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130 | break;
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131 | default:
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