composition.h Example File
demos/composition/composition.h
/****************************************************************************
**
** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
**
** This file is part of the documentation of the Qt Toolkit.
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** and appearing in the file LICENSE.GPL included in the packaging of
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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#ifndef COMPOSITION_H
#define COMPOSITION_H
#include "arthurwidgets.h"
#include <QPainter>
#include <QEvent>
class QPushButton;
class QRadioButton;
class CompositionWidget : public QWidget
{
Q_OBJECT
public:
CompositionWidget(QWidget *parent);
public slots:
void nextMode();
private:
bool m_cycle_enabled;
QRadioButton *rbClear;
QRadioButton *rbSource;
QRadioButton *rbDest;
QRadioButton *rbSourceOver;
QRadioButton *rbDestOver;
QRadioButton *rbSourceIn;
QRadioButton *rbDestIn;
QRadioButton *rbSourceOut;
QRadioButton *rbDestOut;
QRadioButton *rbSourceAtop;
QRadioButton *rbDestAtop;
QRadioButton *rbXor;
};
class CompositionRenderer : public ArthurFrame
{
Q_OBJECT
enum ObjectType { NoObject, Circle, Rectangle, Image };
Q_PROPERTY(int circleColor READ circleColor WRITE setCircleColor)
Q_PROPERTY(int circleAlpha READ circleAlpha WRITE setCircleAlpha)
Q_PROPERTY(bool animation READ animationEnabled WRITE setAnimationEnabled)
public:
CompositionRenderer(QWidget *parent);
void paint(QPainter *);
void mousePressEvent(QMouseEvent *);
void mouseMoveEvent(QMouseEvent *);
void mouseReleaseEvent(QMouseEvent *);
void setCirclePos(const QPointF &pos) { m_circle_pos = pos; update(); }
QSize sizeHint() const { return QSize(500, 400); }
bool animationEnabled() const { return m_animation_enabled; }
int circleColor() const { return m_circle_hue; }
int circleAlpha() const { return m_circle_alpha; }
public slots:
void setClearMode() { m_composition_mode = QPainter::CompositionMode_Clear; update(); }
void setSourceMode() { m_composition_mode = QPainter::CompositionMode_Source; update(); }
void setDestMode() { m_composition_mode = QPainter::CompositionMode_Destination; update(); }
void setSourceOverMode() { m_composition_mode = QPainter::CompositionMode_SourceOver; update(); }
void setDestOverMode() { m_composition_mode = QPainter::CompositionMode_DestinationOver; update(); }
void setSourceInMode() { m_composition_mode = QPainter::CompositionMode_SourceIn; update(); }
void setDestInMode() { m_composition_mode = QPainter::CompositionMode_DestinationIn; update(); }
void setSourceOutMode() { m_composition_mode = QPainter::CompositionMode_SourceOut; update(); }
void setDestOutMode() { m_composition_mode = QPainter::CompositionMode_DestinationOut; update(); }
void setSourceAtopMode() { m_composition_mode = QPainter::CompositionMode_SourceAtop; update(); }
void setDestAtopMode() { m_composition_mode = QPainter::CompositionMode_DestinationAtop; update(); }
void setXorMode() { m_composition_mode = QPainter::CompositionMode_Xor; update(); }
void setCircleAlpha(int alpha) { m_circle_alpha = alpha; update(); }
void setCircleColor(int hue) { m_circle_hue = hue; update(); }
void setAnimationEnabled(bool enabled) { m_animation_enabled = enabled; update(); }
private:
void updateCirclePos();
QPainter::CompositionMode m_composition_mode;
QImage m_image;
QImage m_buffer;
QImage m_base_buffer;
int m_circle_alpha;
int m_circle_hue;
QPointF m_circle_pos;
QPointF m_offset;
ObjectType m_current_object;
bool m_animation_enabled;
};
#endif // COMPOSITION_H