|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# composition.h Example File
demos/composition/composition.h

        /****************************************************************************
        **
        ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the demonstration applications of the Qt Toolkit.
        **
        ** Licensees holding valid Qt Preview licenses may use this file in
        ** accordance with the Qt Preview License Agreement provided with the
        ** Software.
        **
        ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
        ** information about Qt Commercial License Agreements.
        **
        ** Contact info@trolltech.com if any conditions of this licensing are
        ** not clear to you.
        **
        ** 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;

        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