/****************************************************************************+
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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 demonstration applications of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef DEMO_ITEM_H+
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#define DEMO_ITEM_H+
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+
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#include <QtGui>+
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+
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class DemoItemAnimation;+
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class Guide;+
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+
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class SharedImage+
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{+
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public:+
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    SharedImage() : refCount(0), image(0), pixmap(0){};+
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    ~SharedImage()+
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    {+
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        delete image;+
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        delete pixmap;+
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    }+
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+
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    int refCount;+
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    QImage *image;+
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    QPixmap *pixmap;+
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    QMatrix matrix;+
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    QRectF unscaledBoundingRect;+
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};+
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+
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class DemoItem : public QGraphicsItem+
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{+
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+
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public:+
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    DemoItem(QGraphicsScene *scene = 0, QGraphicsItem *parent = 0);+
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    virtual ~DemoItem();+
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+
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    bool inTransition();+
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    virtual void animationStarted(int id = 0){ Q_UNUSED(id); };+
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    virtual void animationStopped(int id = 0){ Q_UNUSED(id); };+
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    virtual void prepare(){};+
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    void setRecursiveVisible(bool visible);+
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    void useSharedImage(const QString &hashKey);+
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    void setNeverVisible(bool never = true);+
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    static void setMatrix(const QMatrix &matrix);+
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    virtual QRectF boundingRect() const; // overridden+
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    void setPosUsingSheepDog(const QPointF &dest, const QRectF &sceneFence);+
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+
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    qreal opacity;+
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    bool locked;+
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    DemoItemAnimation *currentAnimation;+
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    bool noSubPixeling;+
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+
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    // Used if controlled by a guide:+
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    void useGuide(Guide *guide, float startFrame = 0);+
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    void guideAdvance(float distance);+
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    void guideMove(float moveSpeed);+
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    void setGuidedPos(const QPointF &position);+
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    QPointF getGuidedPos();+
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    float startFrame;+
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    float guideFrame;+
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    Guide *currGuide;+
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+
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protected:+
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    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option = 0, QWidget *widget = 0); // overridden+
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    virtual QImage *createImage(const QMatrix &) const { return 0; };+
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    virtual bool collidesWithItem(const QGraphicsItem *, Qt::ItemSelectionMode) const { return false; };+
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    bool prepared;+
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+
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private:+
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    SharedImage *sharedImage;+
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    QString hashKey;+
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    bool neverVisible;+
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    bool validateImage();+
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+
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    // Used if controlled by a guide:+
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    void switchGuide(Guide *guide);+
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    friend class Guide;+
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    QPointF guidedPos;+
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+
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    // The next static hash is shared amongst all demo items, and+
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    // has the purpose of reusing images to save memory and time+
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    static QHash<QString, SharedImage *> sharedImageHash;+
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    static QMatrix matrix;+
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};+
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+
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#endif // DEMO_ITEM_H+
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+
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