Re: 3.2.3 RC2

[Benjamin Lindner]

> 
> changeset:   9395:54a3fa5d4376
> user:        Ben Abbott <address@hidden>
> date:        Thu Aug 06 07:30:34 2009 +0200
> summary:     Avoid the flickering x11 window seen with rapid gnuplot
> updates.
> http://hg.tw-math.de/release-3-2-x/rev/54a3fa5d4376
> 
> 
> The above changeset seems to be the origin by which mouse  zooming in 2D 
> cannot be used.
> 
> I have tested binaries built  by MinGW-4.4.0 (Official Version) and the
> gnuplot 4.3 cvs for windows
> (the recent source) is used. The terminal is windows terminal.
> 

I can confirm that this changeset breaks interactive usability.

BTW I realized that it is no longer possible to debug what is going on between 
octave and gnuplot by simply doing 
gnuplot_binary("tee log.txt | gnuplot")
since octave now seems to rely on 2way communication to gnuplot ?

Is there a different way of peeking into what is sent to gnuplot - other than 
to compile a version of gnuplot with an intrinsic "tee"-like feature, 
prefreably a way even windows understands?

Back to the gnuplot issue, I believe I can guess what went wrong with this 
changeset:

Prior to this changeset __go_draw_figure__.m issued a 
"set multiplot", then drew the axes and then issued a
"unset multiplot". Fine.

With this changeset gnuplot_drawnow.m issues a "set multiplot" in 
gnuplot_set_term prior to calling __go_draw_figure__.m, 
\begin{emph}
but it never issues the corresponding "unset multiplot"!
\end{emph}
leaving gnuplot in a multiplot state in which interative mouse and keyboard are 
disabled  - I tested this for the windows and wxt terminal.

Now I lost track a bit of all the plotting backend specific code changes, so I 
am not sure where this is best fixed. Could one of the plotting gurus take a 
look at it?

> 
> Anyway the chanageset should be re-modified to enable us to use mouse
> zooming in windows terminal on
> gnuplot backend.

I agree, this should be fixed, otherwise the gnuplot backend is pretty much 
useless on windows.

benjamin


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