code: public void setController(Object parent, String name, GraphicsController controller) {
  		// set them all
  		doSetController(getElement(parent, name), controller, Event.TOUCHEVENTS | Event.MOUSEEVENTS | Event.ONDBLCLICK
  				| Event.ONMOUSEWHEEL);
  	}
docs: Set the controller on an element of this <code>GraphicsContext</code> so it can react to events.
  
  @param parent
  the parent of the element on which the controller should be set.
  @param name
  the name of the child element on which the controller should be set
  @param controller
  The new <code>GraphicsController</code>