Extend IconView clickable area

["Jonas H." <jonas lophus org>]

Hello list,

how can I extend the clickable area of a text column in a one-columned 
IconView (whose item width is greater than the text itself)?

Illustration: http://jonas.lophus.org/iconview.png
I want the red rectangle to be clickable, too, having the same effect as 
clicking on the "hello 1" texdt.

I'm using Python + GObject introspection but I wouldn't mind doing this 
in C either.

Thanks,
Jonas