Calendar Tabs

[pghosh]

When I try the following in LGPL 3.1p.0.0:

public class Main implements EntryPoint {

	@Override
	public void onModuleLoad() {
		new Calendar(){{
			setMargin(4);
			setWidth100();
			setHeight100();
			doOnRender(new Function(){
				@Override
				public void execute() {
					final TabSet tabs = (TabSet) getChildren()[0].getChildren()[0];
					final Tab listTab = new Tab("List");
					tabs.addTabSelectedHandler(new TabSelectedHandler() {
						@Override
						public void onTabSelected(TabSelectedEvent event) {
							Canvas controlBar = tabs.getChildren()[2];
							controlBar.setVisible(!event.getTab().equals(listTab));
						}
					});
					tabs.addTab(listTab);
			}});
		}}.draw();
	}
}

The date selector stops responding to tab changes. Is there another way I can hook in an additional tab and register a TabSelectedEventHandler?