/** Initializes the call button. */
  private void initCallButton() {
    List<ProtocolProviderService> telephonyProviders = CallManager.getTelephonyProviders();

    if (telephonyProviders != null && telephonyProviders.size() > 0) {
      if (callButton.getParent() != null) return;

      callButton.setAlignmentX(JButton.CENTER_ALIGNMENT);

      callButton.setMnemonic(
          GuiActivator.getResources().getI18nMnemonic("service.gui.CALL_CONTACT"));

      buttonPanel.add(callButton);

      callButton.addActionListener(
          new ActionListener() {
            public void actionPerformed(ActionEvent e) {
              String searchText = parentWindow.getCurrentSearchText();

              if (searchText == null) return;

              CallManager.createCall(searchText, callButton);
            }
          });
    } else {
      buttonPanel.remove(callButton);
    }
  }
  private void initAddContactButton() {
    addButton.setAlignmentX(JButton.CENTER_ALIGNMENT);

    addButton.setMnemonic(GuiActivator.getResources().getI18nMnemonic("service.gui.ADD_CONTACT"));

    buttonPanel.add(addButton);

    addButton.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            AddContactDialog dialog = new AddContactDialog(parentWindow);

            dialog.setContactAddress(parentWindow.getCurrentSearchText());
            dialog.setVisible(true);
          }
        });
  }