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     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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    40 ****************************************************************************/

    41 

    42 #include "blurpicker.h"

    43 

    44 #include <QtGui>

    45 

    46 #include "blureffect.h"

    47 

    48 #ifndef M_PI

    49 #define M_PI 3.14159265358979323846

    50 #endif

    51 

    52 BlurPicker::BlurPicker(QWidget *parent): QGraphicsView(parent), m_index(0.0)

    53 {

    54     setBackgroundBrush(QPixmap(":/images/background.jpg"));

    55     setScene(&m_scene);

    56 

    57     setupScene();

    58     updateIconPositions();

    59 

    60     connect(&m_timeLine, SIGNAL(valueChanged(qreal)), SLOT(updateIconPositions()));

    61     m_timeLine.setDuration(400);

    62 

    63     setRenderHint(QPainter::Antialiasing, true);

    64     setFrameStyle(QFrame::NoFrame);

    65 }

    66 

    67 void BlurPicker::updateIconPositions()

    68 {

    69     m_index = m_timeLine.currentFrame() / 1000.0;

    70 

    71     qreal baseline = 0;

    72     for (int i = 0; i < m_icons.count(); ++i) {

    73         QGraphicsItem *icon = m_icons[i];

    74         qreal a = ((i + m_index) * 2 * M_PI) / m_icons.count();

    75         qreal xs = 170 * sin(a);

    76         qreal ys = 100 * cos(a);

    77         QPointF pos(xs, ys);

    78         pos = QTransform().rotate(-20).map(pos);

    79         pos -= QPointF(40, 40);

    80         icon->setPos(pos);

    81         baseline = qMax(baseline, ys);

    82         static_cast<BlurEffect *>(icon->graphicsEffect())->setBaseLine(baseline);

    83     }

    84 

    85     m_scene.update();

    86 }

    87 

    88 void BlurPicker::setupScene()

    89 {

    90     m_scene.setSceneRect(-200, -120, 400, 240);

    91 

    92     QStringList names;

    93     names << ":/images/accessories-calculator.png";

    94     names << ":/images/accessories-text-editor.png";

    95     names << ":/images/help-browser.png";

    96     names << ":/images/internet-group-chat.png";

    97     names << ":/images/internet-mail.png";

    98     names << ":/images/internet-web-browser.png";

    99     names << ":/images/office-calendar.png";

   100     names << ":/images/system-users.png";

   101 

   102     for (int i = 0; i < names.count(); i++) {

   103         QPixmap pixmap(names[i]);

   104         QGraphicsPixmapItem *icon = m_scene.addPixmap(pixmap);

   105         icon->setZValue(1);

   106         icon->setGraphicsEffect(new BlurEffect(icon));

   107         m_icons << icon;

   108     }

   109 

   110     QGraphicsPixmapItem *bg = m_scene.addPixmap(QPixmap(":/images/background.jpg"));

   111     bg->setZValue(0);

   112     bg->setPos(-200, -150);

   113 }

   114 

   115 void BlurPicker::keyPressEvent(QKeyEvent *event)

   116 {

   117     if (event->key() == Qt::Key_Left) {

   118         if (m_timeLine.state() == QTimeLine::NotRunning) {

   119             m_timeLine.setFrameRange(m_index * 1000, m_index * 1000 - 1000);

   120             m_timeLine.start();

   121             event->accept();

   122         }

   123     }

   124 

   125     if (event->key() == Qt::Key_Right) {

   126         if (m_timeLine.state() == QTimeLine::NotRunning) {

   127             m_timeLine.setFrameRange(m_index * 1000, m_index * 1000 + 1000);

   128             m_timeLine.start();

   129             event->accept();

   130         }

   131     }

   132 }