[Octave-bug-tracker] [bug #44916] Printing Qt-drawn figures produces faulty files

[Rik]

Follow-up Comment #77, bug #44916 (project octave):

The minor problem reported by Michael Godfrey seems to be an issue whenever
the graphics toolkit is not qt.  Either gnuplot, or fltk, will produce the
warning.


./run-octave -f --no-gui
graphics_toolkit fltk
__opengl_info__
warning: __opengl_info__: can not obtain OpenGL information
warning: called from
    __opengl_info__ at line 64 column 5


It seems that FLTK needs to have an object actually drawn before the OpenGL
fields get populated in properties.  I pushed a cset here
(http://hg.savannah.gnu.org/hgweb/octave/rev/fddc5604d1fa) which draws an axes
object and then calls drawnow(), rather than waitfor with a 1 second delay, in
order to force the graphics system to populate the fields.


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