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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "blurpicker.h"
+
+#include <QtGui>
+
+#include "blureffect.h"
+#include "customshadereffect.h"
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+BlurPicker::BlurPicker(QWidget *parent): QGraphicsView(parent), m_index(0.0)
+{
+ setBackgroundBrush(QPixmap(":/images/background.jpg"));
+ setScene(&m_scene);
+
+ setupScene();
+ updateIconPositions();
+
+ connect(&m_timeLine, SIGNAL(valueChanged(qreal)), SLOT(updateIconPositions()));
+ m_timeLine.setDuration(400);
+
+ setRenderHint(QPainter::Antialiasing, true);
+ setFrameStyle(QFrame::NoFrame);
+}
+
+void BlurPicker::updateIconPositions()
+{
+ m_index = m_timeLine.currentFrame() / 1000.0;
+
+ qreal baseline = 0;
+ for (int i = 0; i < m_icons.count(); ++i) {
+ QGraphicsItem *icon = m_icons[i];
+ qreal a = ((i + m_index) * 2 * M_PI) / m_icons.count();
+ qreal xs = 170 * sin(a);
+ qreal ys = 100 * cos(a);
+ QPointF pos(xs, ys);
+ pos = QTransform().rotate(-20).map(pos);
+ pos -= QPointF(40, 40);
+ icon->setPos(pos);
+ baseline = qMax(baseline, ys);
+ if (i != 3)
+ static_cast<BlurEffect *>(icon->graphicsEffect())->setBaseLine(baseline);
+ }
+
+ m_scene.update();
+}
+
+void BlurPicker::setupScene()
+{
+ m_scene.setSceneRect(-200, -120, 400, 240);
+
+ QStringList names;
+ names << ":/images/accessories-calculator.png";
+ names << ":/images/accessories-text-editor.png";
+ names << ":/images/help-browser.png";
+ names << ":/images/internet-group-chat.png";
+ names << ":/images/internet-mail.png";
+ names << ":/images/internet-web-browser.png";
+ names << ":/images/office-calendar.png";
+ names << ":/images/system-users.png";
+
+ for (int i = 0; i < names.count(); i++) {
+ QPixmap pixmap(names[i]);
+ QGraphicsPixmapItem *icon = m_scene.addPixmap(pixmap);
+ icon->setZValue(1);
+ if (i == 3)
+ icon->setGraphicsEffect(new CustomShaderEffect());
+ else
+ icon->setGraphicsEffect(new BlurEffect(icon));
+ m_icons << icon;
+ }
+
+ QGraphicsPixmapItem *bg = m_scene.addPixmap(QPixmap(":/images/background.jpg"));
+ bg->setZValue(0);
+ bg->setPos(-200, -150);
+}
+
+void BlurPicker::keyPressEvent(QKeyEvent *event)
+{
+ if (event->key() == Qt::Key_Left) {
+ if (m_timeLine.state() == QTimeLine::NotRunning) {
+ m_timeLine.setFrameRange(m_index * 1000, m_index * 1000 - 1000);
+ m_timeLine.start();
+ event->accept();
+ }
+ }
+
+ if (event->key() == Qt::Key_Right) {
+ if (m_timeLine.state() == QTimeLine::NotRunning) {
+ m_timeLine.setFrameRange(m_index * 1000, m_index * 1000 + 1000);
+ m_timeLine.start();
+ event->accept();
+ }
+ }
+}