animateditem.cpp Example File

 /****************************************************************************
 **
 ** 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
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
 **     of its contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #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);
 }