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

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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(qreal penWidth READ realPenWidth WRITE setRealPenWidth)
 public:
     enum PathMode { CurveMode, LineMode };

     PathStrokeRenderer(QWidget *parent, bool smallScreen = false);

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

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

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

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

 signals:
     void clicked();

 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;

     qreal 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;

     bool m_smallScreen;
     QPoint m_mousePress;
     bool m_mouseDrag;

     QHash<int, int> m_fingerPointMapping;
 };

 class PathStrokeControls : public QWidget
 {
     Q_OBJECT
 public:
     PathStrokeControls(QWidget* parent, PathStrokeRenderer* renderer, bool smallScreen);

 signals:
     void okPressed();
     void quitPressed();

 private:
     PathStrokeRenderer* m_renderer;

     QGroupBox *m_capGroup;
     QGroupBox *m_joinGroup;
     QGroupBox *m_styleGroup;
     QGroupBox *m_pathModeGroup;

     void createCommonControls(QWidget* parent);
     void layoutForDesktop();
     void layoutForSmallScreens();

 private slots:
     void emitQuitSignal();
     void emitOkSignal();

 };

 class PathStrokeWidget : public QWidget
 {
     Q_OBJECT
 public:
     PathStrokeWidget(bool smallScreen);
     void setStyle ( QStyle * style );

 private:
     PathStrokeRenderer *m_renderer;
     PathStrokeControls *m_controls;

 private slots:
     void showControls();
     void hideControls();

 };

 #endif // PATHSTROKE_H