[gtkada] Resizing event

[Domingo Fiesta Segura]

Hello, this mail is about a toolkit question, not about a bug.

I have a gtk.extra.sheet with three columns but I want the middle column to 
be resizable as wide as the width of the parent container minus the width 
of the side columns (which would be fixed). So, when the window is resized 
the column width should be changed automatically in some handler I have to 
program.

The questions are:

- Which signal should I handle?
- Should I connect the handler to the signal emmited by the sheet itself, 
the parent container (actually a scrolled_window) or the window?

Thanks in advance.