Path: utzoo!utgpu!watmath!watcgl!watnext!jmberkley
From: jmberkley@watnext.waterloo.edu (J. Michael Berkley)
Newsgroups: comp.windows.x
Subject: Re: Instrinsics resource question
Message-ID: <8437@watcgl.waterloo.edu>
Date: 6 Mar 89 13:17:29 GMT
References: <1489@ncar.ucar.edu>
Sender: daemon@watcgl.waterloo.edu
Reply-To: jmberkley@watnext.waterloo.edu (J. Michael Berkley)
Organization: U. of Waterloo, Ontario
Lines: 31

In article <1489@ncar.ucar.edu> clyne@redcloud.ucar.edu.UUCP () writes:
>
>Hello, Can someone tell me why the following code fragment won't return
>the font used by the label widget? 
>
>	/*
>	 *	get font
>	 */ 
>	n = 0; 
>	XtSetArg(args[n], XtNfont, &font); n++;
>	XtGetValues(comm, args, n);
>
>	/*
>	 *	length of string in pixels
>	 */
>	width = XTextWidth(&font, "string", strlen("string");

I've been having trouble with this too.  Using XtGetValues() didn't
work for finding the font, so I started poking around in the public
and private structures for the Text Sink.  It turns out that the font
element is ALWAYS NULL in the public sink struct, but is set correctly
in the private sink struct.  XtGetValues() must be looking at the
public struct.

******************************************
* Mike Berkley, University of Waterloo   *
* PAMI Lab                               *
* jmberkley@watnext.waterloo.edu         *
* jmberkley@watnext.UWaterloo.CA         *
* {utai,uunet}!watmath!watnext!jmberkley *
******************************************