public ConfigTreeRenderer() 
{
    setDoubleBuffered(false);
}

DefaultConstructor.

 public Component getTreeCellRendererComponent(JTree tree,
    Object value,
    boolean sel,
    boolean expanded,
    boolean leaf,
    int row,
    boolean hasFocus) 
{
    if (value instanceof ConfigTreeRootNode)
    {
      return super.getTreeCellRendererComponent(tree, "< Root >", //$NON-NLS-1$
              sel, expanded, leaf, row, hasFocus);
    }
    else if (value instanceof ConfigTreeSectionNode)
    {
      final ConfigTreeSectionNode node = (ConfigTreeSectionNode) value;
      return super.getTreeCellRendererComponent(tree, node.getName(),
              sel, expanded, leaf, row, hasFocus);
    }
    else if (value instanceof ConfigTreeModuleNode)
    {
      final ConfigTreeModuleNode node = (ConfigTreeModuleNode) value;
      final StringBuffer text = new StringBuffer();
      text.append(node.getModule().getName());
      text.append(" - "); //$NON-NLS-1$
      text.append(node.getModule().getMajorVersion());
      text.append('.");
      text.append(node.getModule().getMinorVersion());
      text.append('-");
      text.append(node.getModule().getPatchLevel());
      return super.getTreeCellRendererComponent(tree, text.toString(),
              sel, expanded, leaf, row, hasFocus);
    }
    return super.getTreeCellRendererComponent(tree, value,
            sel, expanded, leaf, row, hasFocus);
}

Configures the renderer based on the passed in components. The value is set from messaging the tree with convertValueToText, which ultimately invokes toString on value. The foreground color is set based on the selection and the icon is set based on on leaf and expanded.

 public  void paint(Graphics g) 
{
    super.paint(new BugFixProxyGraphics2D((Graphics2D) g));
}

Paints the value. The background is filled based on selected. The TreeCellRenderer or Swing or something else has a bug inside so that the clipping of the graphics is not done correctly. If a rectangle is painted with Graphics.fillRect(int, int, int, int) the graphics is totally messed up.