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From: uejio@lll-crg.llnl.gov (Jeremy Y. Uejio)
Newsgroups: comp.windows.x,ba.windows.x
Subject: Need help with class data of widgets
Message-ID: <47393@lll-winken.LLNL.GOV>
Date: 5 Feb 90 19:34:16 GMT
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Reply-To: uejio@lll-crg.llnl.gov (Jeremy Y. Uejio)
Followup-To: comp.windows.x
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Organization: Lawrence Livermore National Laboratory
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I'm having trouble understanding the use and access of class data for
widgets.  Basically, I would like to have a function that is common to
a bunch of different widgets that are of different types.  For
example, I have widgets which are subclasses of command widgets and
widgets which are subclasses of AsciiText.  I would like to define
some sort of generic procedure for both types of widgets so that I can
use the same call for both.  I.e.:

	mycommonroutine(object,data);

where object is either the command widget or the text widget and data
is just some pointer.

I'm thinking of using the class data to hold this routine, but then I
don't know how to access it or even declare it.  Maybe something like:

	typedef struct _MyTextClassPart {
		void   (*mycommonroutine)();
	} MyTextClassPart;

Can anyone help me with this?



				Thanks in advance,
				jeremy uejio@lll-crg.llnl.gov

Jeremy Uejio (pronounced 'oo-ay-joe')    uejio@lll-crg.llnl.gov
uucp:  {gatech,pyramid,rutgers}!lll-crg!uejio
other things to try:  uejio%lll-crg.llnl.gov@relay.cs.net