Qt 4.0: pathstroke.h Example File (demos/pathstroke/pathstroke.h)

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# pathstroke.h Example File
demos/pathstroke/pathstroke.h

        #ifndef PATHSTROKE_H

        #include <QtGui>
        #include "arthurwidgets.h"

        class PathStrokeRenderer : public ArthurFrame
        {
            Q_OBJECT
        public:
            enum PathMode { CurveMode, LineMode };

            PathStrokeRenderer(QWidget *parent);

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

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

        public slots:
            void setPenWidth(int penWidth) { m_penWidth = penWidth / 10.0; update(); }
            void setAnimation(bool animation);

            void setFlatCap() { m_capStyle = Qt::FlatCap; update(); }
            void setSquareCap() { m_capStyle = Qt::SquareCap; update(); }
            void setRoundCap() { m_capStyle = Qt::RoundCap; update(); }

            void setBevelJoin() { m_joinStyle = Qt::BevelJoin; update(); }
            void setMiterJoin() { m_joinStyle = Qt::MiterJoin; update(); }
            void setRoundJoin() { m_joinStyle = Qt::RoundJoin; update(); }

            void setCurveMode() { m_pathMode = CurveMode; update(); }
            void setLineMode() { m_pathMode = LineMode; update(); }

            void setSolidLine() { m_penStyle = Qt::SolidLine; update(); }
            void setDashLine() { m_penStyle = Qt::DashLine; update(); }
            void setDotLine() { m_penStyle = Qt::DotLine; update(); }
            void setDashDotLine() { m_penStyle = Qt::DashDotLine; update(); }
            void setDashDotDotLine() { m_penStyle = Qt::DashDotDotLine; update(); }
            void setCustomDashLine() { m_penStyle = Qt::NoPen; update(); }

        private:
            void initializePoints();
            void updatePoints();

            QBasicTimer m_timer;

            PathMode m_pathMode;

            bool m_wasAnimated;

            double m_penWidth;
            int m_pointCount;
            int m_pointSize;
            int m_activePoint;
            QVector<QPointF> m_points;
            QVector<QPointF> m_vectors;

            Qt::PenJoinStyle m_joinStyle;
            Qt::PenCapStyle m_capStyle;

            Qt::PenStyle m_penStyle;
        };

        class PathStrokeWidget : public QWidget
        {
            Q_OBJECT
        public:
            PathStrokeWidget();

        private:
            PathStrokeRenderer *m_renderer;
        };

        #endif // PATHSTROKE_H