[pygtk] Looking for way to stop notebox page switch.

[Mike Bernson]

I have a app that has notebook of tab with different things that can edit. When
I start editing on one tab I need to stop switching pages util that edits are
done.

I am look for a simple way to stop notebook from switch pages.

Is there a property that can be set to stop switching ?
Is there a signal that a can catch and return true to stop switch ?