/**
   * 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);
  }
  /**
   * Resets the rollover state of all rollover components in the current cell except the component
   * given as a parameter.
   *
   * @param excludeComponent the component to exclude from the reset
   */
  public void resetRolloverState(Component excludeComponent) {
    if (!chatButton.equals(excludeComponent)) chatButton.getModel().setRollover(false);

    if (!callButton.equals(excludeComponent)) callButton.getModel().setRollover(false);

    if (!callVideoButton.equals(excludeComponent)) callVideoButton.getModel().setRollover(false);

    if (!desktopSharingButton.equals(excludeComponent))
      desktopSharingButton.getModel().setRollover(false);

    if (!addContactButton.equals(excludeComponent)) addContactButton.getModel().setRollover(false);

    if (customActionButtons != null) {
      Iterator<JButton> buttonsIter = customActionButtons.iterator();
      while (buttonsIter.hasNext()) {
        JButton button = buttonsIter.next();

        if (!button.equals(excludeComponent)) button.getModel().setRollover(false);
      }
    }

    if (customActionButtonsUIGroup != null) {
      Iterator<JButton> buttonsIter = customActionButtonsUIGroup.iterator();
      while (buttonsIter.hasNext()) {
        JButton button = buttonsIter.next();

        if (!button.equals(excludeComponent)) button.getModel().setRollover(false);
      }
    }
  }
  /** Resets the rollover state of all rollover components in the current cell. */
  public void resetRolloverState() {
    chatButton.getModel().setRollover(false);
    callButton.getModel().setRollover(false);
    callVideoButton.getModel().setRollover(false);
    desktopSharingButton.getModel().setRollover(false);
    addContactButton.getModel().setRollover(false);

    if (customActionButtons != null) {
      Iterator<JButton> buttonsIter = customActionButtons.iterator();
      while (buttonsIter.hasNext()) {
        JButton button = buttonsIter.next();
        button.getModel().setRollover(false);
      }
    }

    if (customActionButtonsUIGroup != null) {
      Iterator<JButton> buttonsIter = customActionButtonsUIGroup.iterator();
      while (buttonsIter.hasNext()) {
        JButton button = buttonsIter.next();
        button.getModel().setRollover(false);
      }
    }
  }