[pygtk] How to remain visible on to p of fullscreen application?

[Francesco Fumanti]

Hi,

Onboard is an onscreen keyboard that is written in python and that uses gtk. I would like it to remain visible also when there is another application that goes fullscreen. Could anybody please tell me whether this is possible and how to do it; or point me to some documentation about how to achieve it?

Many thanks in advance,

Francesco.