[matplotlib-devel] Alternate lasso: click to form polygon

I wanted something more precise (and easier on the carpal tunnel) than
the included Lasso widget. Inspired by the existing Lasso, I forked
out an alternate approach that creates a polygon with mouse clicks and
returns a list of vertices to a callback function.

See the attached for a demo. It's been tested with WxAgg running off
recent svn. I'm using idle_event, which isn't mentioned in the docs
for the released version.

If there's interest, I'll put together a patch to add this to widgets.py.

Thanks,
Eric B