Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!usc!samsung!emory!ogccse!cvedc!nosun!fpssun!celit!ucsdhub!hp-sdd!hplabs!hplabsz!mayer
From: mayer@hplabsz.HPL.HP.COM (Niels Mayer)
Newsgroups: comp.windows.x
Subject: Re: intercepting a call to XtAddCallback
Message-ID: <4322@hplabsz.HPL.HP.COM>
Date: 8 Nov 89 02:20:31 GMT
References: <1792@gazette.bcm.tmc.edu>
Reply-To: mayer@hplabs.hp.com (Niels Mayer)
Organization: Hewlett-Packard Labs, Software Technology Lab, Palo Alto, CA.
Lines: 38
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In article <1792@gazette.bcm.tmc.edu> jcarson@moniz.bcm.tmc.edu (Janet Carson) writes:
>I am writing a widget which is essentially a "wrapper" around
>several subwidgets.  By using intialize_hook and set_values_hook, 
>I pass the arguments for "my widget" on to the subwidget which
>"really" wants them.  However, I have a problem with callbacks.  
> ...
>Is there any way for a widget to intercept a call to XtAddCallback
>and re-direct it to another widget?

Take a look at the implementation of the Motif RowColumn manager. If you
specify an XmNentryCallback, all activate events on the rowcolumn widget's
children (aka entries) will be handled by the rowcolumn widget.

Here's the relevant source code... please don't look at it if you don't
have a source licence....










...Ha ha ha.... just joking... If I did that, I'd have lawyers swarming
over me like a halo-of-flies on dung.





-------------------------------------------------------------------------------
	    Niels Mayer -- hplabs!mayer -- mayer@hplabs.hp.com
		  Human-Computer Interaction Department
		       Hewlett-Packard Laboratories
			      Palo Alto, CA.
				   *