a portable text user interface ?

[J.Jacob]

I build a TextMap class for solving some of the problems, it is
available at
http://www.liacs.nl/~jjacob/textmap.py
It is (should be!) completely portable and has a demo when run
standalone.
It is only for output.  Input is not that hard with Tkinter.
The class can be used as a mixin class.  The .text attribute (type
Tkinter.Text) of the class can be used for adding functionality and
doing sophisticated stuff.
Any comments from people with Tkinter experience is very welcome since
i started studying Tkinter last week and i am sure there is a lot to
improve !
For example what is the most common way to bind e.g. <SHIFT-LEFTARROW>
to the horizontal scrollbar so it moves left, what key combo is most
common, does Tkinter have a key combo for that already ?