title: Give TreeViewNodes different icons based on the node's text
body: <p>I am trying to change a treeview node's icon based on the induvidual node's text. For example: I want all nodes named "DWG" to display a specific image/icon, all nodes named "xls" to display another icon/image, and all remaining nodes to display no icon.</p>
  
  <p>So far I've been able to add images during runtime, but I don't know how to proceed with the rest.</p>