Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!mit-eddie!bloom-beacon!terre.matra-espace.fr!paulet
From: paulet@terre.matra-espace.fr (Pascal PAULET 6109 FAMI2)
Newsgroups: comp.windows.x
Subject: blinking emulation
Message-ID: <9012130839.AA02102@TERRE.matra-espace.fr>
Date: 13 Dec 90 08:39:14 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 20

Alan, you wrote:
(Message-Id: <EJJA-2921-9149@nasamail>)

>I need to provide some kind of software blinking of colors.
>This is someting of a grey area for me (pardon the pun).

>Could a program be written to add a group of colors to the
>root window's default colormap, and periodically change the
>definition of those colors - thus affecting *all* windows
>on the display?

I personally never wrote such a program but I've seen a commercial
UIMS (SAMMI2 from SSI) which implemented a solution. By tracing the
X protocol with xscope, you can see that they have a dedicated
process which just uses XStoreColors on some entries of the default
colormap. In this way, they toggle specific entries of the colormap
and this provides quite a good blinking effect for X clients using
these specific entries.

Pascal.