pathstroke.h Example File

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  #ifndef PATHSTROKE_H
  #define PATHSTROKE_H

  #include "arthurwidgets.h"

  #include <QtWidgets>

  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 };

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

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

      QSize sizeHint() const override { 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