*/
public void onMouseUp(int x, int y) {
// let all handlers know
for (SurfaceMouseDragHandler handler : fDragHandlers) {
handler.onDragStop(fStartDragLoc, new Vector2(x, y), fStartDragId, fLastId);
}
// disable the onMouseMove calls again by setting fStartDragLoc to null
fStartDragId = null;
fStartDragLoc = null;