[Catalyst] Catalyst Interface to Tree Structure Pulled from DB.

[David Kamholz]

I have a fairly sophisticated setup of this sort working for editing  
a directed acyclic graph ("forest"). It has a view of the sort you  
described and also lets you arbitrarily add nodes to the graph, add  
links between nodes, rename nodes, etc. It relies on AJAX -- for  
example, when you open a "folder" it calls the server to get the  
conents -- but it wouldn't be too difficult to rewrite. My graph is  
big enough that it makes sense not to load the whole thing on the  
page load, but your case may be different.

The most important pieces for your purposes would be the TT templates  
and JS code. The Catalyst end just puts some stuff in the stash and  
keeps track of session data (e.g. which branches are open or closed).  
The database end goes through DBIC and, at least for the sort of  
stuff you're talking about, is not particularly complicated.

Regards, Dave