linkPopupToDropDownPosition(dropDownControl);
}
@SuppressWarnings("deprecation")
public void onStartScreen() {
final ListBox listBox = getElement().findNiftyControl("#listBox", ListBoxControl.class);
nifty.subscribe(screen, listBox.getId(), ListBoxSelectionChangedEvent.class,
new DropDownListBoxSelectionChangedEventSubscriber(nifty, screen, listBox, dropDownControl, popupInstance));
linkPopupToDropDownPosition(dropDownControl);
dropDownControl.refresh();
}