examples/graphicsview/portedasteroids/animateditem.cpp
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 "animateditem.h"
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#include <QtGui/qbitmap.h>
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#include <QtGui/qpainter.h>
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AnimatedPixmapItem::AnimatedPixmapItem(const QList<QPixmap> &animation,
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                                       QGraphicsScene *scene)
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    : QGraphicsItem(0, scene), currentFrame(0), vx(0), vy(0)
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{
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    for (int i = 0; i < animation.size(); ++i) {
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        QPixmap pixmap = animation.at(i);
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        Frame frame;
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        frame.pixmap = pixmap;
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        frame.shape = QPainterPath();
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        frame.boundingRect = pixmap.rect();
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        frames << frame;
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    }
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}
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void AnimatedPixmapItem::setFrame(int frame)
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{
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    if (!frames.isEmpty()) {
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        prepareGeometryChange();
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        currentFrame = frame % frames.size();
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    }
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}
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void AnimatedPixmapItem::advance(int phase)
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{
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    if (phase == 1)
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        moveBy(vx, vy);
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}
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QRectF AnimatedPixmapItem::boundingRect() const
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{
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    return frames.at(currentFrame).boundingRect;
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}
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QPainterPath AnimatedPixmapItem::shape() const
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{
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    const Frame &f = frames.at(currentFrame);
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    if (f.shape.isEmpty()) {
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        QPainterPath path;
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        path.addRegion(f.pixmap.createHeuristicMask());
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        const_cast<Frame &>(f).shape = path;
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    }
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    return f.shape;
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}
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void AnimatedPixmapItem::paint(QPainter *painter, const QStyleOptionGraphicsItem * /*option*/,
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                               QWidget * /*widget*/)
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{
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    painter->drawPixmap(0, 0, frames.at(currentFrame).pixmap);
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}