| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the demonstration applications of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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| 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at qt-info@nokia.com.
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | #ifndef DEMO_ITEM_H
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| 43 | #define DEMO_ITEM_H
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| 44 |
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| 45 | #include <QtGui>
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| 46 |
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| 47 | class DemoItemAnimation;
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| 48 | class Guide;
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| 49 |
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| 50 | class SharedImage
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| 51 | {
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| 52 | public:
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| 53 | SharedImage() : refCount(0), image(0), pixmap(0){};
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| 54 | ~SharedImage()
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| 55 | {
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| 56 | delete image;
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| 57 | delete pixmap;
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| 58 | }
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| 59 |
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| 60 | int refCount;
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| 61 | QImage *image;
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| 62 | QPixmap *pixmap;
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| 63 | QMatrix matrix;
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| 64 | QRectF unscaledBoundingRect;
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| 65 | };
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| 66 |
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| 67 | class DemoItem : public QGraphicsItem
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| 68 | {
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| 69 |
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| 70 | public:
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| 71 | DemoItem(QGraphicsScene *scene = 0, QGraphicsItem *parent = 0);
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| 72 | virtual ~DemoItem();
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| 73 |
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| 74 | bool inTransition();
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| 75 | virtual void animationStarted(int id = 0){ Q_UNUSED(id); };
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| 76 | virtual void animationStopped(int id = 0){ Q_UNUSED(id); };
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| 77 | virtual void prepare(){};
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| 78 | void setRecursiveVisible(bool visible);
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| 79 | void useSharedImage(const QString &hashKey);
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| 80 | void setNeverVisible(bool never = true);
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| 81 | static void setMatrix(const QMatrix &matrix);
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| 82 | virtual QRectF boundingRect() const; // overridden
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| 83 | void setPosUsingSheepDog(const QPointF &dest, const QRectF &sceneFence);
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| 84 |
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| 85 | qreal opacity;
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| 86 | bool locked;
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| 87 | DemoItemAnimation *currentAnimation;
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| 88 | bool noSubPixeling;
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| 89 |
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| 90 | // Used if controlled by a guide:
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| 91 | void useGuide(Guide *guide, float startFrame = 0);
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| 92 | void guideAdvance(float distance);
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| 93 | void guideMove(float moveSpeed);
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| 94 | void setGuidedPos(const QPointF &position);
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| 95 | QPointF getGuidedPos();
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| 96 | float startFrame;
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| 97 | float guideFrame;
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| 98 | Guide *currGuide;
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| 99 |
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| 100 | protected:
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| 101 | virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option = 0, QWidget *widget = 0); // overridden
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| 102 | virtual QImage *createImage(const QMatrix &) const { return 0; };
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| 103 | virtual bool collidesWithItem(const QGraphicsItem *, Qt::ItemSelectionMode) const { return false; };
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| 104 | bool prepared;
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| 105 |
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| 106 | private:
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| 107 | SharedImage *sharedImage;
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| 108 | QString hashKey;
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| 109 | bool neverVisible;
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| 110 | bool validateImage();
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| 111 |
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| 112 | // Used if controlled by a guide:
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| 113 | void switchGuide(Guide *guide);
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| 114 | friend class Guide;
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| 115 | QPointF guidedPos;
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| 116 |
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| 117 | // The next static hash is shared amongst all demo items, and
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| 118 | // has the purpose of reusing images to save memory and time
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| 119 | static QHash<QString, SharedImage *> sharedImageHash;
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| 120 | static QMatrix matrix;
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| 121 | };
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| 122 |
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| 123 | #endif // DEMO_ITEM_H
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| 124 |
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