How to use

getFolderOpen

method

in

org.apache.wicket.extensions.markup.html.tree.DefaultAbstractTree

/**
 * Returns the resource reference for icon of specified tree node.
 *
 * @param node
 *            The node
 * @return The package resource reference
 */
protected ResourceReference getNodeIcon(TreeNode node)
{
  if (node.isLeaf() == true)
  {
    return getItem();
  }
  else
  {
    if (isNodeExpanded(node))
    {
      return getFolderOpen();
    }
    else
    {
      return getFolderClosed();
    }
  }
}

/**
 * Returns the resource reference for icon of specified tree node.
 * 
 * @param node
 *            The node
 * @return The package resource reference
 */
protected ResourceReference getNodeIcon(final TreeNode node)
{
  if (node.isLeaf() == true)
  {
    return getItem();
  }
  else
  {
    if (isNodeExpanded(node))
    {
      return getFolderOpen();
    }
    else
    {
      return getFolderClosed();
    }
  }
}