Perl/Tk advanced widget placement

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 such 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 below another. The number of frames is based on a variable. I have already created 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 does not give a dynamic look to the application that I want. I can attach a code snippet if needed.

Thanks and regards,
Prakash