setLayout(new FlowLayout());
final DateTimeFormat dateTimeFormat = DateTimeFormat.getFormat("dd/MM/yyyy");
final DateMenu menu = new DateMenu();
if(activeDate !=null && !"".equals(activeDate.trim()))
menu.getDatePicker().setValue(dateTimeFormat.parse(activeDate),true);
menu.addListener(new EventType(Event.ONKEYDOWN+Event.ONKEYUP), new Listener<ComponentEvent>() {
public void handleEvent(ComponentEvent ce){
nativeCallback(callback, dateTimeFormat.format(menu.getDate()));
}
});