public void mouseWheelMoved(MouseWheelEvent e){
  int rot=e.getWheelRotation();
  timelineLayer.adjustZoomFromMouseWheel(rot);
}

public void mouseWheelMoved ( MouseWheelEvent e ) { int rot = e . getWheelRotation ( ) ; timelineLayer . adjustZoomFromMouseWheel ( rot ) ; }
invoked from the mousewheellistener interface .
