ShowOn missing from backends_gtk ?

If I start interactive2.py, it complains that ShowOn can't be imported.

Sure enough, there seems to be no method ShowOn. Or at least I can't find
it. Consequently interactive2.py loses it's charm :slight_smile:

Or have I misunderstood something?

-gary
WinXP, python 2.3.3, matplotlib 5.0, GTK 2.2.4.1