/**
     * Function called when an audio device is plugged or unplugged.
     *
     * @param event The property change event which may concern the audio device.
     */
    public void propertyChange(PropertyChangeEvent event) {
      if (DeviceConfiguration.PROP_AUDIO_SYSTEM_DEVICES.equals(event.getPropertyName())) {
        NotificationService notificationService = getNotificationService();

        if (notificationService != null) {
          // Registers only once to the  popup message notification
          // handler.
          if (!isRegisteredToPopupMessageListener) {
            isRegisteredToPopupMessageListener = true;
            managePopupMessageListenerRegistration(true);
          }

          // Fires the popup notification.
          ResourceManagementService resources = NeomediaActivator.getResources();
          Map<String, Object> extras = new HashMap<String, Object>();

          extras.put(NotificationData.POPUP_MESSAGE_HANDLER_TAG_EXTRA, this);
          notificationService.fireNotification(
              DEVICE_CONFIGURATION_HAS_CHANGED,
              resources.getI18NString("impl.media.configform" + ".AUDIO_DEVICE_CONFIG_CHANGED"),
              resources.getI18NString(
                  "impl.media.configform" + ".AUDIO_DEVICE_CONFIG_MANAGMENT_CLICK"),
              null,
              extras);
        }
      }
    }
  /**
   * Creates a new <tt>JMenuItem</tt> and adds it to this <tt>JPopupMenu</tt>.
   *
   * @param textKey the key of the internationalized string in the resources of the application
   *     which represents the text of the new <tt>JMenuItem</tt>
   * @param iconID the <tt>ImageID</tt> of the image in the resources of the application which
   *     represents the icon of the new <tt>JMenuItem</tt>
   * @param name the name of the new <tt>JMenuItem</tt>
   * @return a new <tt>JMenuItem</tt> instance which has been added to this <tt>JPopupMenu</tt>
   */
  private JMenuItem createMenuItem(String textKey, ImageID iconID, String name) {
    ResourceManagementService resources = GuiActivator.getResources();
    JMenuItem menuItem =
        new JMenuItem(
            resources.getI18NString(textKey), new ImageIcon(ImageLoader.getImage(iconID)));

    menuItem.setMnemonic(resources.getI18nMnemonic(textKey));
    menuItem.setName(name);

    menuItem.addActionListener(this);

    add(menuItem);

    return menuItem;
  }