public void addMapPopupOpenedListener(final MapPopupOpenedListener listener) {
eventListeners.addListener(this, listener, EventType.MAP_POPUP_OPEN,
new EventHandler() {
public void onHandle(EventObject eventObject) {
MapPopupOpenedEvent e = new MapPopupOpenedEvent(
eventObject);
listener.onPopupOpened(e);
}
});
}