Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!lll-winken!elroy.jpl.nasa.gov!jpl-devvax!david
From: david@jpl-devvax.JPL.NASA.GOV (David E. Smyth)
Newsgroups: comp.windows.x
Subject: Re: Calling Actions from Actions
Message-ID: <11620@jpl-devvax.JPL.NASA.GOV>
Date: 28 Feb 91 16:45:04 GMT
References: <38437@netnews.upenn.edu>
Reply-To: david@jpl-devvax.JPL.NASA.GOV (David E. Smyth)
Organization: Jet Propulsion Laboratory, Pasadena, CA
Lines: 41

corry@eniac.seas.upenn.edu (Chris Corry) writes:
>     I didn't think it would work but I wrote an action (MyDeleteChar) and
>replaced the "delete-previous-char" action with it. Then I tried to directly
>call DeleteBackwardChar (found in the private widget code) from my action if
>needed. As you might expect my link ended like this:
>
>>%make -fhypermake
>>ld: Undefined symbol
>>   _DeleteOrKill

See page 367 (section 7.12 - Calling Action Procedures Directly) of the
new Asente and Swick "X Window System Toolkit" or page 138 (section
10.9 - Invoking Actions Directly) of the "X Toolkit Intrinsics - C
Language Interface X11R4 version."

void XtCallActionProc(widget,action,event,params,num_params)
    Widget	widget;
    String	action;
    XEvent*	event;
    String*	params;
    Cardinal	num_params;

Asente&Swick write:

    XtCallActionProc searches for the action name for the widget ... If the
    search finds no action with the specified name, XtCallActionProc
    generates a warning and returns. ...  Otherwise XtCallActionProc calls
    the action procedure, passing the specified event, parameters, and
    parameter counts.


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David Smyth				david@jpl-devvax.jpl.nasa.gov
Senior Software Engineer,		seismo!cit-vax!jpl-devvax!david
X and Object Guru.			(818)393-0983
Jet Propulsion Lab, M/S 230-103, 4800 Oak Grove Drive, Pasadena, CA 91109
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