I have written a short python script to do paint-with-erase (see below)
Have no idea if it has unwanted side effects.
It gives no visible feedback of the current drawing mode :(
I'd be interested to hear how I might provide this feedback.
Script
'''
toggle_eraser.py
toggles the current tool between eraser and paintbrush
Brendan Scott
Version: 1.20130807
7 August 2013
Copyright (C) 2013 Brendan Scott
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see