Re: changeset 9395 (3.2.x branch) should be applied not only x11 term but on windows, wxt, ( and aqua) term

[Ben Abbott]

On Sep 9, 2009, at 3:18 AM, Tatsuro MATSUOKA wrote:

> Hello
>
> --- Benjamin Lindner wrote:
>
> > Hmm, I tend to disagree.
> > With this patch we try fixing a hole in the cauldron by drilling
> > additional holes.
> >
> > I think it would be cleaner if the initial patch which supposedly  
> > fixes
> > some behaviour for x11 (and only x11?) is repaired so that it only
> > modifies behaviour for x11 and leaves the rest at status-quo.
> >
> > Is the undesired behaviour of the x11 reminal really caused by  
> > octave's
> > gnuplot backend? Or is it a gnuplot bug? If so, I think it would be
> > better to fix it in gnuplot.
>
> fplot ("cos", [0, 2*pi])
> drawnow("windows", "foo.txt", 9, "debug.txt")
>
> and see the debug.txt
> Expiations attachment file are
> debug_305.txt -- case octave 3.0.5/mingw
> debug_322.txt -- case octave 3.2.2/mingw
> debug_323_modifiedBenPatch.txt -- case octave 3.2.3/mingw with  
> modified Ben's patch to windows
> terminal
>
> I add 'pause 2' to see  like
> cat debug_305.txt | gnuplot
>
> For the case of debug_322.txt, screnn cleared and plot was carried  
> out.
> The above is cause of flicking.
>
> This was caused by 'set multiplot;' at line 7 in debug_322.txt.
>
> This bug caused by octave but not by gnuplot!!
>
> Regards
>
> Tatsuro

I had come to the same conclusion. The flickering is caused by set/ 
unset multiplot.

It *may* be possible that this can be fixed in gnuplot and I'm willing  
to file a bug report with the gnuplot developers, but thus far I've  
not be able to produce a simple script to demonstrate the behavior.

However, I favor applying Tatsuro's patch as it will have no negative  
impact and will eliminate the flickering for current releases of  
gnuplot. When/if the problem is fixed in a future version of gnuplot,  
the function __gnuplot_has_feature__ may be modified and used to  
produce the desired results for different versions of gnuplot.

Ben