[Zope] tree widget question

[Dennis Allison]

Anyone had experience using the tree widget to render mixed structures?
I have a layout something like this --

>>>>>>>	Folder 
	    Folder 
		XML
	    Folder
		XML
	    Folder
		XML
	    Folder
		XML
	    Folder
		Folder
		   Folder

and so forth.

I'd like to point the tree widget at the top level folder and have it
render a set of stuff.  When an XML (ParsedXML) folder is encountered,
the branches method has to be different.  (That was the effort of the 
day, getting tpValues to ignore implementation nodes.  I did it by brain 
surgery on the Package source--a decision that will certainly come back 
to haunt me.)  Presumably, the way to make it work is to use branches-expr
and toggle between a folderish objectValues and a ParsedXML-ish tpValues.

Anyone had any experience doing this?

-d