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From: pjs@granite.dec.com (Philip Schneider)
Newsgroups: comp.windows.x
Subject: Help with double-click recognition.
Message-ID: <603@granite.dec.com>
Date: 13 Oct 89 17:12:24 GMT
Organization: DEC Advanced Technology Development, Palo Alto, CA
Lines: 30


    Okay, toolkit wizards, how about this one:

    I've created a drawing widget under Xaw by modifying the
"TemplateWidget" example in the Athena Widget documentation.  I've
tried in many ways to figure out how to get it to call one
callback on a single button press, and another for a double-click.  
So far, I've not been succesful, and it seems from my understanding
of the documentation and from my experimentation that it might not
be possible.

    Is there something obvious I'm overlooking, or what?  Any solution
to this problem would be greatly appreciated.  If the answer has to be
"I know how to do it with Motif, or DECWindows", etc., that's no
problem.

    I DO have a solution that involves trapping the single button-press,
checking the event queue for the appropriate ButtonPress and ButtonRelease
events, and attempting to "do the right thing"; this, however, is unreliable
due to the "meddling" of the toolkit with the event queue, and is rather
ugly :-)

- Philip Schneider


-- 
Philip J. Schneider			| pjs@decwrl.dec.com
DEC Advanced Technology Development	| decwrl!pjs
100 Hamilton Avenue			| (415)853-6538
Palo Alto, CA  94301			| (415)386-8232