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<pre> /****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 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 GNU
** General Public Licensing requirements will be met:
** http:<span class="comment">//www.trolltech.com/products/qt/opensource.html</span>
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http:<span class="comment">//www.trolltech.com/products/qt/licensing.html or contact the</span>
** sales department at sales@trolltech.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#ifndef COMPOSITION_H
#define COMPOSITION_H
#include "arthurwidgets.h"
#include <QPainter>
#include <QEvent>
class QPushButton;
class QRadioButton;
#ifdef QT_OPENGL_SUPPORT
#include <QtOpenGL>
#endif
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();
void drawBase(QPainter &p);
void drawSource(QPainter &p);
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;
#ifdef QT_OPENGL_SUPPORT
QGLPixelBuffer *m_pbuffer;
GLuint m_base_tex;
GLuint m_compositing_tex;
int m_pbuffer_size; <span class="comment">// width==height==size of pbuffer</span>
QSize m_previous_size;
#endif
};
#endif <span class="comment">// COMPOSITION_H</span></pre>
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