* @param dy
* @return
*/
private EyeTrackingEvent createWrapped(final EyeTrackingEvent event, final int dx,
final int dy) {
return new TrackingEventWrapper(event) {
@Override
public Point getGazeCenter() {
final Point gazeCenter = event.getGazeCenter();
return new Point(gazeCenter.x + dx, gazeCenter.y + dy);