Qt 4.8: animateditem.cpp Example File (graphicsview/portedasteroids/animateditem.cpp)

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# animateditem.cpp Example File

graphicsview/portedasteroids/animateditem.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
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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 in
     **     the documentation and/or other materials provided with the
     **     distribution.
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     **     of its contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     #include "animateditem.h"

     #include <QtGui/QBitmap>
     #include <QtGui/QPainter>
     #include <QGraphicsScene>

     AnimatedPixmapItem::AnimatedPixmapItem(const QList<QPixmap> &animation,
                                            QGraphicsScene *scene)
         : QGraphicsItem(0), currentFrame(0), vx(0), vy(0)
     {
         for (int i = 0; i < animation.size(); ++i) {
             QPixmap pixmap = animation.at(i);
             Frame frame;
             frame.pixmap = pixmap;
             frame.shape = QPainterPath();
             frame.boundingRect = pixmap.rect();
             frames << frame;
         }

         scene->addItem(this);
     }

     void AnimatedPixmapItem::setFrame(int frame)
     {
         if (!frames.isEmpty()) {
             prepareGeometryChange();
             currentFrame = frame % frames.size();
         }

         //scene->addItem(this);
     }

     void AnimatedPixmapItem::advance(int phase)
     {
         if (phase == 1)
             moveBy(vx, vy);
     }

     QRectF AnimatedPixmapItem::boundingRect() const
     {
         return frames.at(currentFrame).boundingRect;
     }

     QPainterPath AnimatedPixmapItem::shape() const
     {
         const Frame &f = frames.at(currentFrame);
         if (f.shape.isEmpty()) {
             QPainterPath path;
             path.addRegion(f.pixmap.createHeuristicMask());
             const_cast<Frame &>(f).shape = path;
         }
         return f.shape;
     }

     void AnimatedPixmapItem::paint(QPainter *painter, const QStyleOptionGraphicsItem * /*option*/,
                                    QWidget * /*widget*/)
     {
         painter->drawPixmap(0, 0, frames.at(currentFrame).pixmap);
     }