canvassing for assistance

[stewart.midwinter at gmail.com]

Sean, nice work on canvasser!  One question: what is the purpose of
'scale'?  I notice that if you have already drawn a line on the canvas,
then 'scale' can be used to draw a straight-line element extending from
the end of the previous freehand line, but if you start with a blank
screen, 'scale' has no effect.

BTW if you want to extend your app further, take a look at paint.py in
the Vaults of Parnassus:
http://py.vaults.ca/apyllo.py?i=173784088

cheers,
S