[Rd] RE:bug 548 graphics '*' (PR#549)

[ripley@stats.ox.ac.uk]

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.

-- 
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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