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From: rlh2@ukc.ac.uk (Richard Hesketh)
Newsgroups: comp.windows.x.motif
Subject: Re: a transparent composite widget
Message-ID: <5141@harrier.ukc.ac.uk>
Date: 20 Jul 90 09:53:16 GMT
References: <1520@seti.inria.fr> <9007191732.AA14355@hpcvxben.HP.COM>
Reply-To: rlh2@ukc.ac.uk (Richard Hesketh)
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Organization: Computing Lab, University of Kent at Canterbury, UK.
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In article <9007191732.AA14355@hpcvxben.HP.COM> ben@HPCVXBEN.CV.HP.COM (Benjamin Ellsworth) writes:
>
>>         A Transparent Composite Widget Class

>I suppose that just about anything is possible, but what you're asking
>for would be very, very hard to do.

Why is it very hard?  It you make the backgroundPixmap of the bulletin board
"None" then you should get a transparent composite widget?  However, you
will have to unmap and map it everytime you get an expose event (ignoring the
expose event that this unmap/map generates) or if
the overrlapped widgets are changed.  Is this what you mean by hard?
I have used this technique to display greyed out command widgets (sensitive ==
FALSE) and overlay them with a transparent window that still accepts events,
this proved extremely easy to implement.

I have someone who wants to draw shapes in separate windows (for clipping and
ease of manipulation) and overlay them, he could do this using a display
postscript or shape extension .. but who wants to be tied
to a particular server???  Are not windows without backgrounds available
on all servers?

Richard Hesketh   :   @nsfnet-relay.ac.uk:rlh2@ukc.ac.uk
		  :   rlh2@ukc.ac.uk    ..!mcsun!ukc!rlh2
---                                               
Computing Lab., University of Kent at Canterbury,
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