pathstroke.h Example File
^{demos/pathstroke/pathstroke.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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    #ifndef PATHSTROKE_H
    #define PATHSTROKE_H

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

    class PathStrokeRenderer : public ArthurFrame
    {
        Q_OBJECT
        Q_PROPERTY(bool animation READ animation WRITE setAnimation)
        Q_PROPERTY(double penWidth READ realPenWidth WRITE setRealPenWidth)
    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); }

        bool animation() const { return m_timer.isActive(); }

        double realPenWidth() const { return m_penWidth; }
        void setRealPenWidth(double penWidth) { m_penWidth = penWidth; update(); }

    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