[Tutor] Testing for gui

[Alan Gauld]

From: Ken Stevens [mailto:kens7601 at gmail.com]
> Yes. Under Linux no x-server running? I guess it really wouldn't be
> applicable under a windows enviroment, 

OK,  I see what you wanted now, ignore my previous message
.
Note that X windows is a protocol and not a GUI. 
There are several GUI environments that can run 
under X, not all of them requre an X server on the 
local machine.

Secondly note that not all GUIs on Unix run 
under X - the Mac Aqua interface is one example, 
NeXT/OpenStep another, Squeak another and the 
original Sun SunView and OpenLook(*) were all 
non X based GUIs that are still occasionally found 
today.

(*)Later versions of openLook were ported to X, 
the original used display postscript as did NeXTstep.


HTH, (in a nit picking kind of way! :-)

Alan G.