Thanks you very much. I found something interesting though, the canvas's
width and height properties are not updated when it is resized by its
packing. Looks like an oversight to me, but I've just demonstrated that
I don't have a complete grasp of Tk, so... I can use a Configure
callback to kee
You should just use 'pack' properly. Namely, the fill= and expand=
parameters. In this case, you want to pack(fill=BOTH, expand=YES).
For the button, you may want to use pack(anchor=E) or anchor=W to make
it stick to one side of the window.
The additional parameters for the button (both creation
