Automatic resizing of frames based on tree collapse or expand

Hi All,

I have a specific requirement. I want several (equal number of) text areas, 
drop-down lists and trees to be packed in a toplevel window. The order is su
ch as below:
A text area, drop-down list and a tree from left to right in that order (in 
a frame or something similar). Several such frames arranged vertically one b
elow another. The number of frames is based on a variable. I have already cr
eated this successfully. The thing that is looking tricky is how to realign 
the frames when the tree in one of the frames is collapsed or expanded? The 
way it works now is that the individual trees are in Scrolled Panes. This do
es not give a dynamic look to the application that I want. I can attach a co
de snippet if needed.

Thanks and regards,
Prakash