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authoraxis <qt-info@nokia.com>2009-04-24 11:34:15 (GMT)
committeraxis <qt-info@nokia.com>2009-04-24 11:34:15 (GMT)
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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
+