1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2015 The Qt Company Ltd. 4 ** Contact: http://www.qt.io/licensing/ 5 ** 6 ** This file is part of the demonstration applications of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see http://www.qt.io/terms-conditions. For further 15 ** information use the contact form at http://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 2.1 or version 3 as published by the Free 20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and 21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the 22 ** following information to ensure the GNU Lesser General Public License 23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and 24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. 25 ** 26 ** As a special exception, The Qt Company gives you certain additional 27 ** rights. These rights are described in The Qt Company LGPL Exception 28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. 29 ** 30 ** GNU General Public License Usage 31 ** Alternatively, this file may be used under the terms of the GNU 32 ** General Public License version 3.0 as published by the Free Software 33 ** Foundation and appearing in the file LICENSE.GPL included in the 34 ** packaging of this file. Please review the following information to 35 ** ensure the GNU General Public License version 3.0 requirements will be 36 ** met: http://www.gnu.org/copyleft/gpl.html. 37 ** 38 ** $QT_END_LICENSE$ 39 ** 40 ****************************************************************************/ 41 42 #ifndef DEMO_ITEM_H 43 #define DEMO_ITEM_H 44 45 #include <QtGui> 46 47 class DemoItemAnimation; 48 class Guide; 49 50 class SharedImage 51 { 52 public: SharedImage()53 SharedImage() : refCount(0), image(0), pixmap(0){}; ~SharedImage()54 ~SharedImage() 55 { 56 delete image; 57 delete pixmap; 58 } 59 60 int refCount; 61 QImage *image; 62 QPixmap *pixmap; 63 QMatrix matrix; 64 QRectF unscaledBoundingRect; 65 }; 66 67 class DemoItem : public QGraphicsItem 68 { 69 70 public: 71 DemoItem(QGraphicsScene *scene = 0, QGraphicsItem *parent = 0); 72 virtual ~DemoItem(); 73 74 bool inTransition(); 75 virtual void animationStarted(int id = 0){ Q_UNUSED(id); }; 76 virtual void animationStopped(int id = 0){ Q_UNUSED(id); }; prepare()77 virtual void prepare(){}; 78 void setRecursiveVisible(bool visible); 79 void useSharedImage(const QString &hashKey); 80 void setNeverVisible(bool never = true); 81 static void setMatrix(const QMatrix &matrix); 82 virtual QRectF boundingRect() const; // overridden 83 void setPosUsingSheepDog(const QPointF &dest, const QRectF &sceneFence); 84 85 qreal opacity; 86 bool locked; 87 DemoItemAnimation *currentAnimation; 88 bool noSubPixeling; 89 90 // Used if controlled by a guide: 91 void useGuide(Guide *guide, float startFrame = 0); 92 void guideAdvance(float distance); 93 void guideMove(float moveSpeed); 94 void setGuidedPos(const QPointF &position); 95 QPointF getGuidedPos(); 96 float startFrame; 97 float guideFrame; 98 Guide *currGuide; 99 100 protected: 101 virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option = 0, QWidget *widget = 0); // overridden createImage(const QMatrix &)102 virtual QImage *createImage(const QMatrix &) const { return 0; }; collidesWithItem(const QGraphicsItem *,Qt::ItemSelectionMode)103 virtual bool collidesWithItem(const QGraphicsItem *, Qt::ItemSelectionMode) const { return false; }; 104 bool prepared; 105 106 private: 107 SharedImage *sharedImage; 108 QString hashKey; 109 bool neverVisible; 110 bool validateImage(); 111 112 // Used if controlled by a guide: 113 void switchGuide(Guide *guide); 114 friend class Guide; 115 QPointF guidedPos; 116 117 // The next static hash is shared amongst all demo items, and 118 // has the purpose of reusing images to save memory and time 119 static QHash<QString, SharedImage *> sharedImageHash; 120 static QMatrix matrix; 121 }; 122 123 #endif // DEMO_ITEM_H 124 125