Re: Third release candidate for gnuplot 6

On Wednesday, 15 November 2023 13:56:28 PST Dima Kogan wrote:
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> 
> Hi Ethan. Thanks for pushing this out. I'm trying the 6.0-rc3 tag from
> git.
> 
> A question below.
> 
> 
> Ethan A Merritt <[email protected]> writes:
> 
> > - Replotting and mousing multiplots
> >         o new commands "remultiplot", "set mouse multiplot"
> >         o command sequence to regenerate full multiplot is saved to a datablock
> 
> Can you talk a bit more about this? I wrote a simple script (tst.gp):
> 
>   set multiplot layout 2,1
>   plot x
>   plot x*x
> 
> I run "gnuplot" and "load tst.gp". I see the plots come up, as expected.
> If I do a "replot" then I see the plots being redrawn, but without
> clearing what's behind them, so you get an unusable image. 

Right. That's because you are still at the stage of creating the multiplot.
That stage begins with the commands "set multiplot ..." and ends with
the command "unset multiplot".    The intervening commands are
stored to a temporary buffer and then moved to $GPVAL_LAST_MULTIPLOT
when the "unset multiplot" completes.   At that point the entire sequence
of commands is available to regenerate the original multiplot using the
"remuptiplot" command.

> remultiplot does this:
> 
>   multiplot> remultiplot
>              no datablock named $GPVAL_LAST_MULTIPLOT
> 
> I also tried to "set mouse multiplot", but that doesn't appear to do
> anything different: I can still use the right button to try to zoom, but
> it doesn't do anything. This is with the x11 and qt terminals.

Yeah, at this stage the support for "set mouse multiplot" is pretty rough.
I am in the process of smoothing it out in the master branch and will
merge the improved version back into 6.0 before the full release.

What does work already in 6.0rc3
	2D scroll/pan/zoom
	hot keys (replot toggle log-scale arrow keys ...)

Works in master branch but not in -rc3
	3D mouse rotations
	sanity check the commands inside  $GPVAL_LAST_MULTIPLOT
	multiplots containing 'load' commands
	multiplots using function blocks

Still not working but seems possible
	limit mouse coordinate readout to the single active plot in the multiplot

Not going to happen any time soon
	mouse readout for the non-active plots as well (this what everyone has
	wanted since forever, but the "remultiplot" work isn't going to get there).

> 
> I haven't checked if these are different from the behavior in previous
> releases. It would be great, though, if you could resize a multiplot
> window, and see all the plots be redrawn. Or if you could interactively
> zoom in multiplots.

That should work in rc3.
Try the following test script

####################################################
# demo script for multiplot mousing in 6.0.rc3
set mouse multiplot
set multiplot layout 1,3
plotno = 0.0
do for [i=1:3] {
    plotno = real(i)
    plot sin(x/plotno)/plotno title sprintf("Plot #%g",plotno)
}
unset multiplot
print "about to replot"
remultiplot
print "done, now you can pan/zoom/replot"
####################################################


thanks for testing

	Ethan








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