[Urwid] Documentation or example on how the Signals class is used?

[Ian Ward]

Dominic LoBue wrote:
> Ian,
> 
> Are there any plans on writing up any documentation on how the Signals
> class is supposed to work? Fail that, are there any examples where I
> can see the class used more extensively? The doc strings for ListBox
> and SimpleListWalker that suggest using Signals don't explain how to
> properly use them at all.

You're right, the docs are poor in that area.  In the development 
release the docstrings for the Button class give some usage examples.

Instead of describing usage here I have just added some docstrings to 
signals.py in the development code:
http://excess.org/urwid/changeset/193%3Ae1bc281ac88e

Ian