RE: Qt Wrapper, wx and real-time plots

[Nigel N. <nN...@au...>]

Hi all,=0D
=0D
Thanks to Hans-Bernhard for setting the (wx) scene.=0D

--- On Friday, 10 December 2004 HBB wrote: ---

> Ethan Merritt wrote:
>> On Tuesday 07 December 2004 09:34 am, Petr Mikulik wrote:
>>=0D
>>> Again, since wx transmogrifies into a native app on each
>>> platform, the same option would still be available for
>>> term=3Dwx on a Win32/64 box. =0D
>>=0D
>> What is this "term=3Dwx"; is that an out-of-tree gnuplot=0D
>> driver, or something else entirely?
>
> Nigel Nunn seems otherwise occupied, so I'll bite: it's a=0D
> hypothetical new driver, to be built by extending Nigel's=0D
> work on integrating gnuplot into other apps, as a GUI control=0D
> (original an MFC control, now, apparently, a wx Widget).


My (ever-evolving, monolithic) simulation environment needs=0D
a number of plotting panels.  These are managed by the app,
and plots are generated by simulation threads.  Since most=0D
academics appear to prefer their flavor of *nix rather than=0D
HPC-Win64 on a rack of multi-core blades, there was little=0D
interest in my VC-specific version... hence I migrated the=0D
whole show to wxWidgets.=0D

My experimental term wx works well, but the Gnuplot's use=0D
of global variables effectively limits us to a single panel.=0D
This could be fixed by packaging these globals in a struct,=0D
and associating one such struct with each display panel.=0D
=0D
=0D
>> Or do you mean that rather than reading from a real file,
>> you want gnuplot to read from a shared-memory area?
>
> That's what he meant.  gnuplot-as-a-library, if it is to make=0D
> sense, needs a way to get data passed in by huge blocks, from=0D
> the calling application.  Going through an ASCII data file=0D
> would be pretty foolish for that, but a shared memory-mapped=0D
> file of binary data would do it.
>
> In other words, a named pipe by usage, but implemented in a=0D
> more Windows-ish fashion.

Memory-mapped files were one of those neat innovations the=0D
DEC engineers built into their NT-OS for their Alpha, before=0D
Microsoft bought everything and everyone involved.=0D
=0D
Nigel=0D
=0D
=0D
=0D

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