20 virtual void draw()
const =0;
22 void initializeGL() Q_DECL_OVERRIDE;
23 void resizeGL(
int,
int) Q_DECL_OVERRIDE;
24 void paintGL() Q_DECL_OVERRIDE;
26 void mousePressEvent(QMouseEvent*) Q_DECL_OVERRIDE;
27 void mouseMoveEvent(QMouseEvent*) Q_DECL_OVERRIDE;
28 void wheelEvent(QWheelEvent*) Q_DECL_OVERRIDE;