protected:
void paintEvent(QPaintEvent * event);
+ void DrawPulse(QPainter * painter, QPen * pen, float lastx, float x, float y, float height = 1.0);
+ void DrawPulse(QPainter * painter, Qt::GlobalColor color, float lastx, float x, float y, float height = 1.0);
void mousePressEvent(QMouseEvent * event);
void mouseMoveEvent(QMouseEvent * event);
void mouseReleaseEvent(QMouseEvent * event);