/*
   *	Tab has changed. Focus on saved component for the given tab.
   *  When there is no saved component, focus on the first component.
   */
  public void stateChanged(ChangeEvent e) {
    Component key = tabbedPane.getComponentAt(tabbedPane.getSelectedIndex());

    if (key == null) return;

    Component value = tabFocus.get(key);

    //  First time selecting this tab or focus policy is RESET_FOCUS

    if (value == null) {
      key.transferFocus();
      tabFocus.put(key, value);
    } else //  Use the saved component for focusing
    {
      value.requestFocusInWindow();
    }
  }