tree-view redisplay

Hi,

I am trying to redisplay a tree-view after setting a value that should
change how deep it expands the tree. 

I have tried capi:redisplay-collection-item. It doesn't seem to do anything,
and furthermore, I don't have the tree-view (collection object) handy when
the callback adjusting the expand depth is executed. I have tried
capi:redisplay-interface. It doesn't seem to do anything either.

I must be missing something simple, but looking for examples in some code I 
had written a few years ago, I see that I couldn't do it then either!

-- 
Best Regards, 
- Peter 

Peter Denno 
National Institute of Standards and Technology, 
Manufacturing System Integration Division, 
100 Bureau Drive, Mail Stop 8264             Tel: +1 301-975-3595 
Gaithersburg, MD, USA 20899-8264          FAX: +1 301-975-4694