Shift-TAB functionality breaks when focused point moves offscreen

If point k in a given dataset currently has the focus, then pressing Shift-TAB 
is supposed to move 
the focus to point k-1 in that dataset.  This functionality currently works, as 
long as point k-1 is 
on-screen when Shift-TAB is pressed.  If k-1 is off-screen, the focus indicator 
just disappears 
(because the newly-focused point is now off-screen, and so it doesn't get 
drawn).

The desired behavior is for the screen should scroll left until the newly 
focused point k-1 is in view 
again.

Note: Using the analogous TAB key to move the focused point from k to k+1 (i.e. 
move the focused 
point to the right) works correctly.

Original issue reported on code.google.com by chadtaka...@gmail.com on 22 Jul 2008 at 5:07

marcomachadosantos / gwt-chronoscope

Shift-TAB functionality breaks when focused point moves offscreen #45