Long live Qt for S60!

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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef DEMO_ITEM_H
+#define DEMO_ITEM_H
+
+#include <QtGui>
+
+class DemoItemAnimation;
+class Guide;
+
+class SharedImage
+{
+public:
+    SharedImage() : refCount(0), image(0), pixmap(0){};
+    ~SharedImage()
+    {
+        delete image;
+        delete pixmap;
+    }
+
+    int refCount;
+    QImage *image;
+    QPixmap *pixmap;
+    QMatrix matrix;
+    QRectF unscaledBoundingRect;
+};
+
+class DemoItem : public QGraphicsItem
+{
+
+public:
+    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;
+
+protected:
+    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;
+
+private:
+    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
+