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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (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 http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#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
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