public synchronized void animatePan(double dx,double dy,long duration){
  double panx=dx / m_transform.getScaleX();
  double pany=dy / m_transform.getScaleY();
  animatePanAbs(panx,pany,duration);
}

public synchronized void animatePan ( double dx , double dy , long duration ) { double panx = dx / m_transform . getScaleX ( ) ; double pany = dy / m_transform . getScaleY ( ) ; animatePanAbs ( panx , pany , duration ) ; }
animate a pan along the specified distance in screen ( pixel ) co - ordinates using the provided duration .
