GtkTreeView and selected column

[Franco Broi <franco bordernet com au>]

Hi

I have a bunch of toggles in a TreeView with their state bound to
entries in a model, what's the best way to find out which model column
to modify in my toggled callback?

I'm passing the TreeViewColumn in the userdata but can't find a way to
get back the attribute that binds the toggle state to the model.

Any help much appreciated.

Cheers,