> Date: Mon, 22 May 2000 16:52:59 +0200 (CEST)
> From: Martyn Plummer <plummer@iarc.fr>
> To: ripley@stats.ox.ac.uk
> Subject: Re: [Rd] RE:bug 548 graphics '*' (PR#549)
> Cc: R-bugs@biostat.ku.dk, r-devel@stat.math.ethz.ch
>
> On 22-May-00 ripley@stats.ox.ac.uk wrote:
> > A little more followup. The gtk() device uses gdk_string_width to
> > find the character extents. That seems undocumented anywhere in the
> > gtk+ sources. It is returning the maximal descent for the font for
all
> > input strings on my system. Looking at the current gtk+-1.2.7 sources
it
> > appears to call XTextExtents, and that _should_ give the
> > string descent.
> >
> > Since gdk fonts are private opaque structures I see no way around
this.
> > Without any documentation I do not even know if it is a gdk bug
(although
> > I suspect it is or was). The gdk docs in gtk+ seem seriously
incomplete.
>
>
> The best thing that can be said about the GNOME API documentation is
> that it is getting better. Documentation on glib, gdk and gtk+ is
> available from here:
>
> http://developer.gnome.org/doc/API/
>
> but is still quite sparse.
>
> This is not, in fact, a gdk bug, but is due to a permutation in
> the arguments of gdk_string_extents in GTK_MetricInfo
> (file src/gnome/devGTK.c). It currently reads
>
> gdk_string_extents(gtkd->font, tmp,
> &lbearing, &rbearing,
> &iascent, &idescent, &iwidth);
>
> but should be
>
> gdk_string_extents(gtkd->font, tmp,
> &lbearing, &rbearing,
> &iwidth, &iascent, &idescent);
>
Great, thanks, that solves it. Now I was looking for a man page
for gdk_string_extents to find out what the arguments were supposed to mean,
but never found one.
Bug fixed for 1.1.0.
--
Brian D. Ripley, ripley@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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