Qt 5.8 | Qt Quick | Scene Graph - Custom Geometry | beziercurve.h Example File

Qt 5.8.0 Reference Documentation

# beziercurve.h Example File

scenegraph/customgeometry/beziercurve.h

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      #ifndef BEZIERCURVE_H
      #define BEZIERCURVE_H

      #include <QtQuick/QQuickItem>

      class BezierCurve : public QQuickItem
      {
          Q_OBJECT

          Q_PROPERTY(QPointF p1 READ p1 WRITE setP1 NOTIFY p1Changed)
          Q_PROPERTY(QPointF p2 READ p2 WRITE setP2 NOTIFY p2Changed)
          Q_PROPERTY(QPointF p3 READ p3 WRITE setP3 NOTIFY p3Changed)
          Q_PROPERTY(QPointF p4 READ p4 WRITE setP4 NOTIFY p4Changed)

          Q_PROPERTY(int segmentCount READ segmentCount WRITE setSegmentCount NOTIFY segmentCountChanged)

      public:
          BezierCurve(QQuickItem *parent = 0);
          ~BezierCurve();

          QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *);

          QPointF p1() const { return m_p1; }
          QPointF p2() const { return m_p2; }
          QPointF p3() const { return m_p3; }
          QPointF p4() const { return m_p4; }

          int segmentCount() const { return m_segmentCount; }

          void setP1(const QPointF &p);
          void setP2(const QPointF &p);
          void setP3(const QPointF &p);
          void setP4(const QPointF &p);

          void setSegmentCount(int count);

      signals:
          void p1Changed(const QPointF &p);
          void p2Changed(const QPointF &p);
          void p3Changed(const QPointF &p);
          void p4Changed(const QPointF &p);

          void segmentCountChanged(int count);

      private:
          QPointF m_p1;
          QPointF m_p2;
          QPointF m_p3;
          QPointF m_p4;

          int m_segmentCount;
      };

      #endif