private void showSliderMenu() {
    Point location = new Point(getX(), getY() + getHeight());

    SwingUtilities.convertPointToScreen(location, InputVolumeControlButton.this.getParent());

    if (isFullScreen()) {
      location.setLocation(
          location.getX(),
          location.getY() - sliderMenu.getPreferredSize().getHeight() - getHeight());
    }

    sliderMenu.setLocation(location);

    sliderMenu.addPopupMenuListener(
        new PopupMenuListener() {
          public void popupMenuWillBecomeVisible(PopupMenuEvent ev) {
            sliderMenuIsVisible = true;
          }

          public void popupMenuWillBecomeInvisible(PopupMenuEvent ev) {
            sliderMenuIsVisible = false;
          }

          public void popupMenuCanceled(PopupMenuEvent ev) {}
        });

    sliderMenu.setVisible(!sliderMenu.isVisible());
  }
  /**
   * Calls the given treeNode.
   *
   * @param treeNode the <tt>TreeNode</tt> to call
   */
  private void call(TreeNode treeNode, JButton button, boolean isVideo, boolean isDesktopSharing) {
    if (!(treeNode instanceof ContactNode)) return;

    UIContact contactDescriptor = ((ContactNode) treeNode).getContactDescriptor();

    Point location = new Point(button.getX(), button.getY() + button.getHeight());

    SwingUtilities.convertPointToScreen(location, treeContactList);

    location.y = location.y + treeContactList.getPathBounds(treeContactList.getSelectionPath()).y;
    location.x += 8;
    location.y -= 8;

    CallManager.call(contactDescriptor, isVideo, isDesktopSharing, treeContactList, location);
  }
  /**
   * Shows the appropriate user interface that would allow the user to add the given
   * <tt>SourceUIContact</tt> to their contact list.
   *
   * @param contact the contact to add
   */
  private void addContact(SourceUIContact contact) {
    SourceContact sourceContact = (SourceContact) contact.getDescriptor();

    List<ContactDetail> details =
        sourceContact.getContactDetails(OperationSetPersistentPresence.class);
    int detailsCount = details.size();

    if (detailsCount > 1) {
      JMenuItem addContactMenu =
          TreeContactList.createAddContactMenu((SourceContact) contact.getDescriptor());

      JPopupMenu popupMenu = ((JMenu) addContactMenu).getPopupMenu();

      // Add a title label.
      JLabel infoLabel = new JLabel();
      infoLabel.setText(
          "<html><b>"
              + GuiActivator.getResources().getI18NString("service.gui.ADD_CONTACT")
              + "</b></html>");

      popupMenu.insert(infoLabel, 0);
      popupMenu.insert(new Separator(), 1);

      popupMenu.setFocusable(true);
      popupMenu.setInvoker(treeContactList);

      Point location =
          new Point(
              addContactButton.getX(), addContactButton.getY() + addContactButton.getHeight());

      SwingUtilities.convertPointToScreen(location, treeContactList);

      location.y = location.y + treeContactList.getPathBounds(treeContactList.getSelectionPath()).y;

      popupMenu.setLocation(location.x + 8, location.y - 8);
      popupMenu.setVisible(true);
    } else if (details.size() == 1) {
      TreeContactList.showAddContactDialog(details.get(0), sourceContact.getDisplayName());
    }
  }
  /**
   * Shows/hides the security panel.
   *
   * @param isVisible <tt>true</tt> to show the security panel, <tt>false</tt> to hide it
   */
  public void setSecurityPanelVisible(final boolean isVisible) {
    if (!SwingUtilities.isEventDispatchThread()) {
      SwingUtilities.invokeLater(
          new Runnable() {
            public void run() {
              setSecurityPanelVisible(isVisible);
            }
          });
      return;
    }

    final JFrame callFrame = callRenderer.getCallContainer().getCallWindow().getFrame();

    final JPanel glassPane = (JPanel) callFrame.getGlassPane();

    if (!isVisible) {
      // Need to hide the security panel explicitly in order to keep the
      // fade effect.
      securityPanel.setVisible(false);
      glassPane.setVisible(false);
      glassPane.removeAll();
    } else {
      glassPane.setLayout(null);
      glassPane.addMouseListener(
          new MouseListener() {
            public void mouseClicked(MouseEvent e) {
              redispatchMouseEvent(glassPane, e);
            }

            public void mouseEntered(MouseEvent e) {
              redispatchMouseEvent(glassPane, e);
            }

            public void mouseExited(MouseEvent e) {
              redispatchMouseEvent(glassPane, e);
            }

            public void mousePressed(MouseEvent e) {
              redispatchMouseEvent(glassPane, e);
            }

            public void mouseReleased(MouseEvent e) {
              redispatchMouseEvent(glassPane, e);
            }
          });

      Point securityLabelPoint = securityStatusLabel.getLocation();

      Point newPoint =
          SwingUtilities.convertPoint(
              securityStatusLabel.getParent(),
              securityLabelPoint.x,
              securityLabelPoint.y,
              callFrame);

      securityPanel.setBeginPoint(new Point((int) newPoint.getX() + 15, 0));
      securityPanel.setBounds(0, (int) newPoint.getY() - 5, this.getWidth(), 130);

      glassPane.add(securityPanel);
      // Need to show the security panel explicitly in order to keep the
      // fade effect.
      securityPanel.setVisible(true);
      glassPane.setVisible(true);

      glassPane.addComponentListener(
          new ComponentAdapter() {
            /** Invoked when the component's size changes. */
            @Override
            public void componentResized(ComponentEvent e) {
              if (glassPane.isVisible()) {
                glassPane.setVisible(false);
                callFrame.removeComponentListener(this);
              }
            }
          });
    }
  }