AriaHelper.setVisibleForAssistiveDevicesOnly(
descriptionForAssisitveDevicesElement, true);
calendar = GWT.create(VCalendarPanel.class);
calendar.setParentField(this);
calendar.setFocusOutListener(new FocusOutListener() {
@Override
public boolean onFocusOut(DomEvent<?> event) {
event.preventDefault();
closeCalendarPanel();
return true;