How about:
SystemWindow>>initialize
 "..."
 self startSteppingSelector: #checkWorldSize stepTime: 50.
SystemWindow>>checkWorldSize
 self world extent = self extent ifFalse:[
  self extent: self world extent.
 ].
Checks 20 times per sec but what the hell - if you want the window
fullscreen you probably don't care ;-)
Cheers,
  - Andreas
> -----Original Message-----
> From: squeak-dev-bounces_at_lists.squeakfoundation.org
> [mailto:squeak-dev-bounces_at_lists.squeakfoundation.org] On
> Behalf Of Martin Drautzburg
> Sent: Wednesday, September 17, 2003 8:06 AM
> To: The general-purpose Squeak developers list
> Subject: [Q] fullscreen application
>
>
> What is the best way to have a SystemWindow cover the entire squeak
> window?
>
> I have given it a layout frame and changed the world's layout policy
> to proporional. This basically works except the SystemWindow only
> resizes when the mouse is in the queak window, i.e. right after
> resizing the squeak window the SystemWindow is not resized until I
> enter the squeak window with the mouse.
>