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From: cjmchale@cs.tcd.ie (Ciaran McHale)
Newsgroups: comp.windows.x
Subject: Re: Transparent windows
Message-ID: <1991Mar9.150827.23914@cs.tcd.ie>
Date: 9 Mar 91 15:08:27 GMT
References: <1991Mar8.130813.10424@vaxa.strath.ac.uk>
Organization: DSG, Dept. of Comp. Sci., Trinity College, Dublin.
Lines: 26

In <1991Mar8.130813.10424@vaxa.strath.ac.uk> cadp16@vaxa.strath.ac.uk writes:

>How would I go about creating a transparent window in X.
>
>It has to be the full size of the screen, or rather the same size as the root
>window, with no border...

It depends what you mean by transparent. You might mean an
InputOnly window which you cannot draw to, does not obscure
what lies underneath but can receive input (button and key
presses etc). On the other hand you might be thinking of a
window which "shows through" what's underneath but you can
also draw into. If this is the case then you can either make
use of the Shape extension or use an InputOutput window with
a background of None. In the latter case, the initial
contents of the window are whatever lays underneath but the
window's contents *won't* be updated if to reflect updates to
windows underneath.


Ciaran.
-- 
Ciaran McHale		"Verbosity says it all"			      ____
Department of Computer Science, Trinity College, Dublin 2, Ireland.   \  /
Telephone: +353-1-772941 ext 1538	FAX: +353-1-772204	       \/
Telex: 93782 TCD EI			email: cjmchale@cs.tcd.ie