panel.add(picker);
VerticalPanel monitorEvents = new VerticalPanel();
panel.add(monitorEvents);
// Log hover events.
HighlightHandler logHovers = new HighlightHandler<Date>() {
public void onHighlight(HighlightEvent<Date> event) {
Log.info("Hover:" + event.getHighlightedValue());
}
};
monitorEvents.add(toggleHandler("Log hover events", picker, logHovers));