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From: ik@ctt.bellcore.com (Ik Su Yoo)
Newsgroups: comp.windows.x.motif
Subject: Re: How do I bind multiple functions to a buttonpress?
Message-ID: <1991Apr7.145215.23017@bellcore.bellcore.com>
Date: 7 Apr 91 14:52:15 GMT
References: <922@edstip.EDS.COM> <1991Apr5.175019.14043@cs.tcd.ie>
Sender: usenet@bellcore.bellcore.com (Poster of News)
Reply-To: ik@ctt.bellcore.com (Ik Su Yoo)
Organization: Bell Communications Research
Lines: 34

In article <1991Apr5.175019.14043@cs.tcd.ie>, cjmchale@cs.tcd.ie (Ciaran
McHale) writes:
> In <922@edstip.EDS.COM> kevin@edstip.EDS.COM (Kevin Brown) writes:
> 
> >Using Motif 1.0 and X11R4, is it possible to bind multiple functions
> >to one button press event.  I know that twm contains a function called
> >f.function, which allows the user to name and create a function.  Is 
> >there an equivalent in Motif?
> 
> Use XtAddCallback() to bind function foo to the ButtonPress event on a
> widget. Then use XtAddCallback() again to bind function bar to the
> widget for the same event type. Guess what? Both functions (foo and bar)
> will be invoked (in order of their binding) when the button is
> pressed in the widget. Amazing, isn't it :-)
> 
> And now for my next trick ... :-)
> 

You have the right idea but wrong context. I think the original poster
wanted to bind multiple window manager functions to an event. The
trick is to have an event bound to more than one function. For example:

    Buttons MyButtonBindings
    {
      <Btn1Down>    title  f.raise
      <Btn1Down>    title  f.beep
    }

This worked under Motif1.1/X11R4/SUN. I haven't seen this "feature" in
mwm man page, but it's been a while since I read it :-)

Ik Su Yoo
RRC 1H-229, (908) 699-5764
ik@ctt.bellcore.com