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# pathdeform.h Example File
demos/deform/pathdeform.h

        /****************************************************************************
        **
        ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the documentation 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://www.trolltech.com/products/qt/opensource.html
        **
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        ** review the following information:
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        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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        #ifndef PATHDEFORM_H
        #define PATHDEFORM_H

        #include "arthurwidgets.h"

        #include <QPainterPath>
        #include <QBasicTimer>
        #include <QDateTime>

        class PathDeformRenderer : public ArthurFrame
        {
            Q_OBJECT
            Q_PROPERTY(bool animated READ animated WRITE setAnimated)
            Q_PROPERTY(int radius READ radius WRITE setRadius)
            Q_PROPERTY(int fontSize READ fontSize WRITE setFontSize)
            Q_PROPERTY(int intensity READ intensity WRITE setIntensity)
            Q_PROPERTY(QString text READ text WRITE setText)

        public:
            PathDeformRenderer(QWidget *widget);

            void paint(QPainter *painter);

            void mousePressEvent(QMouseEvent *e);
            void mouseReleaseEvent(QMouseEvent *e);
            void mouseMoveEvent(QMouseEvent *e);
            void timerEvent(QTimerEvent *e);

            QSize sizeHint() const { return QSize(600, 500); }

            bool animated() const { return m_animated; }
            int radius() const { return int(m_radius); }
            int fontSize() const { return m_fontSize; }
            int intensity() const { return int(m_intensity); }
            QString text() const { return m_text; }

        public slots:
            void setRadius(int radius);
            void setFontSize(int fontSize) { m_fontSize = fontSize; setText(m_text); }
            void setText(const QString &text);
            void setIntensity(int intensity);

            void setAnimated(bool animated);

        // signals:
        //     void frameRate(double fps);

        private:
            void generateLensPixmap();
            QPainterPath lensDeform(const QPainterPath &source, const QPointF &offset);

            QBasicTimer m_repaintTimer;
        //     QBasicTimer m_fpsTimer;
        //     int m_fpsCounter;
            QTime m_repaintTracker;

            QVector<QPainterPath> m_paths;
            QVector<QPointF> m_advances;
            QRectF m_pathBounds;
            QString m_text;

            QPixmap m_lens_pixmap;
            QImage m_lens_image;

            int m_fontSize;
            bool m_animated;

            double m_intensity;
            double m_radius;
            QPointF m_pos;
            QPointF m_offset;
            QPointF m_direction;
        };

        class PathDeformWidget : public QWidget
        {
        public:
            PathDeformWidget(QWidget *parent);

        private:
            PathDeformRenderer *m_renderer;
        };

        #endif // PATHDEFORM_H