In the page I try to outline the model for a TK mega widget. It's still a work in progress, and there are topics that I've not even begun to consider (like creating GNU Emacs-like keymaps).
Nevertheless, I hope that it can be useful to someone and I, obviously, welcome comments.
(MM: Hey! Yes!)
All the links go to a generic landing page on 2012-08-15.
Feel free to add comments here. If you cite the name of the node, we can trace the text you are referring to.