public CategoryNodeRenderer() 
{
//   protected JLabel              _label  = new JLabel();
  //--------------------------------------------------------------------------
  //   Private Variables:
  //--------------------------------------------------------------------------
  //--------------------------------------------------------------------------
  //   Constructors:
  //--------------------------------------------------------------------------
    _panel.setBackground(UIManager.getColor("Tree.textBackground"));
    if (_sat == null) {
      // Load the satellite image.
      String resource =
          "/org/apache/log4j/lf5/viewer/images/channelexplorer_satellite.gif";
      URL satURL = getClass().getResource(resource);
      _sat = new ImageIcon(satURL);
    }
    setOpaque(false);
    _checkBox.setOpaque(false);
    _panel.setOpaque(false);
    // The flowlayout set to LEFT is very important so that the editor
    // doesn't jump around.
    _panel.setLayout(new FlowLayout(FlowLayout.LEFT, 0, 0));
    _panel.add(_checkBox);
    _panel.add(this);
    setOpenIcon(_sat);
    setClosedIcon(_sat);
    setLeafIcon(_sat);
}

 protected String buildToolTip(CategoryNode node) 
{
    StringBuffer result = new StringBuffer();
    result.append(node.getTitle()).append(" contains a total of ");
    result.append(node.getTotalNumberOfRecords());
    result.append(" LogRecords.");
    result.append(" Right-click for more info.");
    return result.toString();
}

 public Dimension getCheckBoxOffset() 
{
    return new Dimension(0, 0);
}

 public Component getTreeCellRendererComponent(JTree tree,
    Object value,
    boolean selected,
    boolean expanded,
    boolean leaf,
    int row,
    boolean hasFocus) 
{
    CategoryNode node = (CategoryNode) value;
    //FileNode node = (FileNode)value;
    //String s = tree.convertValueToText(value, selected,
    //						   expanded, leaf, row, hasFocus);
    super.getTreeCellRendererComponent(
        tree, value, selected, expanded,
        leaf, row, hasFocus);
    if (row == 0) {
      // Root row -- no check box
      _checkBox.setVisible(false);
    } else {
      _checkBox.setVisible(true);
      _checkBox.setSelected(node.isSelected());
    }
    String toolTip = buildToolTip(node);
    _panel.setToolTipText(toolTip);
    if (node.hasFatalChildren()) {
      this.setForeground(FATAL_CHILDREN);
    }
    if (node.hasFatalRecords()) {
      this.setForeground(Color.red);
    }
    return _panel;
}