Exact zooming/resizing of stacks and groups

[Fred Moyer]

Has anyone done the heavy lifting to figure out how to do an exact resize/zoom of a stack or a group inside of a stack? What I am talking about is stuff like:

- adjusting the margins of fields as they resize
- adjusting the textsize and textheight of characters in fields as they resize
- adjusting the linesize of lines and bordered graphics as they resize
- keeping the same relative vscroll and hscroll as fields resizes
etc.

I think it would be a lot of work to figure this out; there are lots of factors to consider. But I assume someone has done it already. 

Of course, I am only talking about "proportional" resizing where the the x and y proportions remain the same.

Thanks
Fred Moyer