[gtkmm] changing key bindings (table navigation)

[Peter Gasper <pgasper designadvantage com>]

How can one change the key behaviors within widget, ie. changing what the keys do?

For example: 

I have a table layout containing entry widgets. When the table has the focus
left/right movement is with shift-tab/tab and up/down with up-arrow/down-arrow.
During this movement the default text of each entry widget is highlighted when it has
the focus. The left/right arrow will then move the cursor within the entry widget.

What I want is for navigation within the table to be all with the arrows. The reason
for this is navigation between various containers on screen (~4 of them) is with 
the tab key, and I don't want the user to have to tab through some 96 widgets in the
table layout in order to tab out of the table and get to the next section of the 
screen. 

I'm really not sure how to do this. I would guess it has something to do with
key bindings or changing how the entry widget receives focus.

thank you for your help.