code: public void translate(double x, double y) {
  		saveState();
  		doSetOrigin(new Coordinate(viewState.getX() + x, viewState.getY() + y));
  		fireEvent(false, null);
  	}
docs: Move the view on the map. This happens by translating the camera in turn.
  
  @param x
  Translation factor along the X-axis in world space.
  @param y
  Translation factor along the Y-axis in world space.