@Override
	public void update(Observable arg0, Object arg1) {
		ModelNotification notificationType = (ModelNotification) arg1;
		switch(notificationType) {
			case LIST_OF_PARTICIPANTS_CHANGED: 
				
				break;
			case LANGUAGE_CHANGED:
				refreshLabels();
				break;
			case MESSAGE_RECEIVED: 
				if(chatGuiMinimizedToTray) {
					trayIcon.displayMessage(constsAndProps.getLanguage().getLabel("notification_newmessage"), chatHistory.getLatestMessage().toString(), MessageType.INFO);
				}
				break;						
		}
	}