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From: jaysun@plato.cs.clemson.edu (Jay Williamson - System Manager)
Newsgroups: comp.windows.x.motif
Subject: How to get size of widget like MainWindow, etc.
Message-ID: <1991May24.034033.10485@hubcap.clemson.edu>
Date: 24 May 91 03:40:33 GMT
Sender: news@hubcap.clemson.edu (news)
Organization: Clemson University Computer Science Dept.
Lines: 55

We are running Motif 1.1.1 and the matching X11R4.  In a program
that I am writing, I need to be able to get the width and height
of a widget such as a MainWindow.   

Here is an example of the code:

  n = 0;
  page_parent = XtAppCreateShell ("Page Display", "NSFEditPage",
    topLevelShellWidgetClass, dpy, NULL, 0);
  XtSetMappedWhenManaged(page_parent, False);

  n = 0;
  XtSetArg (args[n], XmNx, 5); n++;
  XtSetArg (args[n], XmNy, 5); n++;
  frame = XmCreateMainWindow (page_parent, "frame", args, n);
  XtManageChild (frame);
}

called_routine()
{
 . . . . .

  ObjWidth(frame);
 . . . . .
}

ObjWidth(w)
Widget w;
{
  Arg arg[2];
  int wid = 0;
  int n = 0;
printf ("wid = %d\n", wid);
  XtSetArg (arg[n], XmNwidth, &wid); n++;
  XtGetValues (w, arg, n);
printf ("wid = %d\n", wid);
  return (wid);
}

The program has output like:

wid = 0
wid = 3276800

I tried executing ObjWidth both before and after page_parent had been
realized but with no difference.  IS there no way to do this??  Am I
doing something wrong??  Am I going crazy??  All of the above???

Any pointers would be a big help.

Thanks in advance,

Jay Williamson, Systems Manager              Clemson University
jaysun@cs.clemson.edu                        Computer Science Dept.
(803) 656-2639                               Clemson, S.C.  29634-1906