Two GtkSpinButton questions

["Daniel Haude" <dunno stoptrick com>]

Hello,

I have two questions concerning GtkSpinbuttons.

1) Can I somehow force a spinbutton to use "scientific" notation like 1e9 ?
   I know I can enter values this way, but on displaying, large numbers  
always get
   converted into chains of zeroes.

2) Can I get rid of the up- and down- arrows to the right? Of course I  
could use a
   text entry for that, but I like the spinbutton's being linked to a  
GtkAdjustment.

--or--

3) Is it time to write my own GtkEntry-based widget if I really want this?  
That in itself
   wouldn't be a problem, except that my interface is largely built using  
Glade, and implementing
   dozens of such entries as custom widgets wouldn't be much fun.

Thanks
--Daniel