[pygtk] Filters window in Thunderbird

[Arnau Sanchez]

Johan,

> Thunderbird is not written in GTK, it's written in XUL.

I've read in many many places that it uses GTK+, but I was esceptical about it, 
as its look and behaviour are indeed very different.

> It's not easy to do the same thing in GTK+, you would have to write your own
>  widget which can display selectable rows.

> http://svn.async.com.br/cgi-bin/viewcvs.cgi/kiwi/trunk/kiwi/ui/selectablebox.py?view=auto
> 
> While not finished, it may give you some hints how to write a complete
> widget like the one in thunderbird.

That was my first idea, using selectable boxes and then just add widgets to 
them. But I didn't know how to do it, I'll try with your code as reference.

thanks!
arnau