/** 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);
    }
  }
  /**
   * Updates the text area to take into account the new search text.
   *
   * @param searchText the search text to update
   */
  private void updateTextArea(String searchText) {
    if (callButton.getParent() != null) {
      textArea.setText(
          GuiActivator.getResources()
              .getI18NString(
                  "service.gui.NO_CONTACTS_FOUND", new String[] {'"' + searchText + '"'}));

      this.revalidate();
      this.repaint();
    }
  }
  /**
   * Creates the <tt>UnknownContactPanel</tt> by specifying the parent window.
   *
   * @param window the parent window
   */
  public UnknownContactPanel(MainFrame window) {
    super(new BorderLayout());

    this.parentWindow = window;

    TransparentPanel mainPanel = new TransparentPanel(new BorderLayout());

    this.add(mainPanel, BorderLayout.NORTH);

    if (!ConfigurationUtils.isAddContactDisabled()) {
      initAddContactButton();
    }

    initCallButton();

    initSMSButton();

    initTextArea();
    mainPanel.add(textArea, BorderLayout.CENTER);

    if (callButton.getParent() != null) {
      textArea.setText(
          GuiActivator.getResources()
              .getI18NString(
                  "service.gui.NO_CONTACTS_FOUND",
                  new String[] {'"' + parentWindow.getCurrentSearchText() + '"'}));
    } else {
      textArea.setText(
          GuiActivator.getResources().getI18NString("service.gui.NO_CONTACTS_FOUND_SHORT"));
    }

    if (buttonPanel.getComponentCount() > 0) {
      TransparentPanel southPanel = new TransparentPanel(new FlowLayout(FlowLayout.CENTER));
      southPanel.add(buttonPanel);

      mainPanel.add(southPanel, BorderLayout.SOUTH);
    }

    loadSkin();
  }