Path: utzoo!attcan!uunet!wuarchive!usc!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!asuvax!hrc!uucs1!gaf
From: gaf@uucs1.UUCP (gaf)
Newsgroups: comp.windows.x
Subject: Re: Getting ID for widget loaded from .uid? (Motif)
Message-ID: <227@uucs1.UUCP>
Date: 11 Jan 90 21:04:00 GMT
References: <223@uucs1.UUCP> <1990Jan10.172318.20172@athena.mit.edu>
Reply-To: gaf@uucs1.UUCP ()
Organization: UUCS inc., Phoenix Az
Lines: 40

In article <1990Jan10.172318.20172@athena.mit.edu> bjaspan@athena.mit.edu (Barr3y Jaspan) writes:

>1) XtNameToWidget takes a widget and a list of names of children and
>returns the widget ID of the last child in the list.  For example,
>suppose you have the widget tree 
>
>             foo
>           bar  baz
>         quux
>
>Then XtNameToWidget(foo, "bar.quux") would return the ID of "quux." 

Ralph Swick also suggested this, and I've made it work in my program,
but have a nit to pick with it.  Doing this ties the code to a specific
widget hierarchy, so that if the button moves to a different menu the
code must change, too.  This would be a shame, as preventing this is
the main benefit of UIL.

>Presumably the ID of "foo" comes from MrmFetchHierarchy().  I seem to
>recall there being a problem with using this with popup windows or menus

I discovered the following, which may or may not be unique to Motif.
Starting with the menu bar widget as reference, the toggle button on
the pulldown is named "popup_File_pulldown.File_pulldown.Logging".
I would never have guessed the "popup_File_pulldown" part of it, since
the hierarchy I created was "File_pulldown.Logging".  Good thing we bought
the source!

>2) callbacks.

Boy, talk about missing something obvious!  The callback is provided with
the widget ID as its first argument.  I've even used it before.  Good grief.
This is sort of like asking if anyone has seen your glasses, only to be told
they're on top of your head.  Must be time for a vacation.

Thanks to all.
-- 
Guy Finney					It's that feeling of deja-vu
UUCS inc.   Phoenix, Az				all over again.
ncar!noao!asuvax!hrc!uucs1!gaf	sun!sunburn!gtx!uucs1!gaf