how to erase lines with wxpython

I'm trying to make a paint tool in wxpython. and i couldn't find a way to make an ( Eraser ) . how can i make an eraser tool - just like the one in windows paint - in wxpython ? please help .

the idea or small code sample would be开发者_运维问答 very helpful

thanks in advance

Have you made a Pen tool? Just set its colour to the canvas' background colour ;)

by the way I actively develop my own wxpython painting program that you may want to check out; see http://code.google.com/p/whyteboard/