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** Copyright (C) 2005-2007 Trolltech ASA. All rights reserved.
** This file is part of the demonstration applications of the Qt Toolkit.
** This file may be used under the terms of the GNU General Public
** License version 2.0 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 GNU
** General Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/
** If you are unsure which license is appropriate for your use, please
** review the following information:
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** or contact the sales department at sales@trolltech.com.
** In addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.0, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
** In addition, as a special exception, Trolltech, as the sole copyright
** holder for Qt Designer, grants users of the Qt/Eclipse Integration
** plug-in the right for the Qt/Eclipse Integration to link to
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** Trolltech reserves all rights not expressly granted herein.
** Trolltech ASA (c) 2007
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE

#ifndef DEMO_ITEM_H
#define DEMO_ITEM_H

#include <QtGui>

class DemoItemAnimation;
class Guide;

class SharedImage
    SharedImage() : refCount(0), image(0), pixmap(0){};
        delete image;
        delete pixmap;
    int refCount;
    QImage *image;
    QPixmap *pixmap;
    QMatrix matrix;
    QRectF unscaledBoundingRect;

class DemoItem : public QGraphicsItem
    DemoItem(QGraphicsScene *scene = 0, QGraphicsItem *parent = 0);
    virtual ~DemoItem();
    bool inTransition();    
    virtual void animationStarted(int id = 0){ Q_UNUSED(id); };
    virtual void animationStopped(int id = 0){ Q_UNUSED(id); };
    virtual void prepare(){};
    void setRecursiveVisible(bool visible);
    void useSharedImage(const QString &hashKey);
    void setNeverVisible(bool never = true);
    static void setMatrix(const QMatrix &matrix);
    virtual QRectF boundingRect() const; // overridden
    void setPosUsingSheepDog(const QPointF &dest, const QRectF &sceneFence);
    qreal opacity;
    bool locked;
    DemoItemAnimation *currentAnimation;
    bool noSubPixeling;
    // Used if controlled by a guide:
    void useGuide(Guide *guide, float startFrame = 0);
    void guideAdvance(float distance);
    void guideMove(float moveSpeed);
    void setGuidedPos(const QPointF &position);
    QPointF getGuidedPos();
    float startFrame;
    float guideFrame;
    Guide *currGuide;
    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option = 0, QWidget *widget = 0); // overridden
    virtual QImage *createImage(const QMatrix &) const { return 0; }; 
    virtual bool collidesWithItem(const QGraphicsItem *, Qt::ItemSelectionMode) const { return false; };
    bool prepared;
    SharedImage *sharedImage;
    QString hashKey;
    bool neverVisible;    
    bool validateImage();
    // Used if controlled by a guide:    
    void switchGuide(Guide *guide);
    friend class Guide;
    QPointF guidedPos;
    // The next static hash is shared amongst all demo items, and
    // has the purpose of reusing images to save memory and time 
    static QHash<QString, SharedImage *> sharedImageHash;
    static QMatrix matrix;

#endif // DEMO_ITEM_H

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