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From: zoo@APS1.SPA.UMN.EDU
Newsgroups: comp.windows.x
Subject: Problem with asciiTextWidget callback
Message-ID: <9005062345.AA03834@aps2.spa.umn.edu>
Date: 6 May 90 23:45:53 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 69

I am trying to register a callback with the asciiTextWidget.  I create
the widget, then add a callback with XtAddCallback.  When I execute the
code, I get a message:
   
Warning: Cannot find callback list in XtAddCallbacks

and then the program runs.  Everything works, except that my callback is
never called.

This happens with R4pl4 and R4pl11, on Sun 4 and Sequent Symmetry, cc and
gcc.


Thanks for any help.  If this turns out to be RTFM, please tell me where in
which FM.  I've got the R4 docs and O'Reilly 4 & 5.  This should work, from
what I've read.

david d [zoo] zuhn		Univ. of Minnesota Dept. of Astronomy
zoo@aps1.spa.umn.edu		Automated Plate Scanner	Project


--------------  the code i'm using  -----------------

#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>

#include <X11/Xaw/Command.h>
#include <X11/Xaw/Box.h>
#include <X11/Xaw/AsciiText.h>


#include <stdio.h>


void Text_Callback (w, client_data, call_data)
     Widget w;
     XtPointer client_data;
     XtPointer call_data;
{
  printf ("text changed\n");
}


int main (argc, argv)
     int argc;
     char **argv;
{
  Widget string, top;

  top = XtInitialize (argv[0],
		      "TEst",
		      NULL,
		      0,
		      &argc,
		      argv);


  string = XtVaCreateManagedWidget ("string",
				    asciiTextWidgetClass,
				    top,
				    XtNstring, "test",
				    XtNeditType, XawtextEdit);

  XtAddCallback (string, XtNcallback, Text_Callback, NULL);
 

  XtRealizeWidget (top);
  XtMainLoop();
}