Toolbar keyboard navigation (was: Toolbar Consistency Issues)

[Soeren Sandmann <sandmann daimi au dk>]

Mark McLoughlin <mark skynet ie> writes:

> 	Basically - BonoboToolbar has a keynav impl. GtkToolbar doesn't.
> Whenever GtkToolbar gets keynav support it will (hopefully) be possible

I spent some time this weekend looking at how to do keyboard
navigation for GtkToolbar, and I think I now know how to do it. I hope
to produce a patch next weekend.

I intend to add keyboard navigation to the EggToolbar in libegg, which
is likely going to replace GtkToolbar (it is API and ABI compatible).
The keyboard navigation I intend to do is

        - F10 cycles focus between all menubars and toolbars in a
          window

        - Focusing a toolbar means focusing the first item on the
          toolbar.  (quoting Calum in bug 54047):

               At which point:

               - left/right arrow key should move focus to
                 previous/next control
               
               - Home/End should move focus to first/last control in
                 toolbar
               
               - (Perhaps) Ctrl+left/right to move to first control in
                 previous/next group of controls?  (If so, should it
                 be visual group or functional group?)

               - Post tooltip for focused control: Shift+F1 (see bug
                 #53614)

               - Activate toolbutton - Enter