22    bool touchDown(qint32 
id, 
const QPointF &pos, std::chrono::microseconds time) 
override;
 
   23    bool touchMotion(qint32 
id, 
const QPointF &pos, std::chrono::microseconds time) 
override;
 
   24    bool touchUp(qint32 
id, std::chrono::microseconds time) 
override;