author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 06 Jul 2010 15:10:48 +0300 | |
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/**************************************************************************** |
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** |
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (qt-info@nokia.com) |
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** |
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** This file is part of the examples of the Qt Toolkit. |
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** |
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** $QT_BEGIN_LICENSE:BSD$ |
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** You may use this file under the terms of the BSD license as follows: |
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** |
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** "Redistribution and use in source and binary forms, with or without |
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** modification, are permitted provided that the following conditions are |
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** met: |
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** * Redistributions of source code must retain the above copyright |
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** notice, this list of conditions and the following disclaimer. |
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** * Redistributions in binary form must reproduce the above copyright |
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** notice, this list of conditions and the following disclaimer in |
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** the documentation and/or other materials provided with the |
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** distribution. |
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** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor |
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** the names of its contributors may be used to endorse or promote |
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** products derived from this software without specific prior written |
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** permission. |
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** |
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
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** $QT_END_LICENSE$ |
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** |
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****************************************************************************/ |
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#include "blurpicker.h" |
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#include <QtGui> |
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#include "blureffect.h" |
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#ifndef M_PI |
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#define M_PI 3.14159265358979323846 |
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#endif |
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BlurPicker::BlurPicker(QWidget *parent): QGraphicsView(parent), m_index(0.0), m_animation(this, "index") |
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{ |
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setBackgroundBrush(QPixmap(":/images/background.jpg")); |
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setScene(new QGraphicsScene(this)); |
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setupScene(); |
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setIndex(0); |
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m_animation.setDuration(400); |
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m_animation.setEasingCurve(QEasingCurve::InOutSine); |
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setRenderHint(QPainter::Antialiasing, true); |
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setFrameStyle(QFrame::NoFrame); |
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} |
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qreal BlurPicker::index() const |
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{ |
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return m_index; |
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} |
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void BlurPicker::setIndex(qreal index) |
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{ |
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m_index = index; |
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qreal baseline = 0; |
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for (int i = 0; i < m_icons.count(); ++i) { |
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QGraphicsItem *icon = m_icons[i]; |
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qreal a = ((i + m_index) * 2 * M_PI) / m_icons.count(); |
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qreal xs = 170 * sin(a); |
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qreal ys = 100 * cos(a); |
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QPointF pos(xs, ys); |
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pos = QTransform().rotate(-20).map(pos); |
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pos -= QPointF(40, 40); |
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icon->setPos(pos); |
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baseline = qMax(baseline, ys); |
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static_cast<BlurEffect *>(icon->graphicsEffect())->setBaseLine(baseline); |
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} |
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scene()->update(); |
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} |
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void BlurPicker::setupScene() |
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{ |
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scene()->setSceneRect(-200, -120, 400, 240); |
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QStringList names; |
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names << ":/images/accessories-calculator.png"; |
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names << ":/images/accessories-text-editor.png"; |
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names << ":/images/help-browser.png"; |
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names << ":/images/internet-group-chat.png"; |
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names << ":/images/internet-mail.png"; |
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names << ":/images/internet-web-browser.png"; |
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names << ":/images/office-calendar.png"; |
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names << ":/images/system-users.png"; |
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for (int i = 0; i < names.count(); i++) { |
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QPixmap pixmap(names[i]); |
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QGraphicsPixmapItem *icon = scene()->addPixmap(pixmap); |
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icon->setZValue(1); |
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icon->setGraphicsEffect(new BlurEffect(icon)); |
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m_icons << icon; |
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} |
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QGraphicsPixmapItem *bg = scene()->addPixmap(QPixmap(":/images/background.jpg")); |
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bg->setZValue(0); |
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bg->setPos(-200, -150); |
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} |
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void BlurPicker::keyPressEvent(QKeyEvent *event) |
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{ |
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int delta = 0; |
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switch (event->key()) |
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{ |
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case Qt::Key_Left: |
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delta = -1; |
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break; |
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case Qt::Key_Right: |
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delta = 1; |
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break; |
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default: |
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break; |
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} |
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if (m_animation.state() == QAbstractAnimation::Stopped && delta) { |
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m_animation.setEndValue(m_index + delta); |
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m_animation.start(); |
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event->accept(); |
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} |
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} |