Gnuplot on Windows

[Reinier H. <re...@he...>]

Hi,

First of all: thanks for the great tool!

However, I have a few windows-specific issues integrating gnuplot with 
some software I'm writing. I use the python Gnuplot class to write 
commands to a gnuplot instance, which works very well.

When wgnuplot is closed manually, the pgnuplot program stays alive. It 
is therefore very hard to detect whether the gnuplot instance has been 
killed (in which case I want to respawn one). I've attached a patch to 
pgnuplot.c to fix this issue: it will check whether the wgnuplot process 
is still alive when it receives input. By writing an empty string from 
my python program twice (with a small delay in between) I can detect 
that wgnuplot is closed. Perhaps it would be even better to call 
select() on stdin, but I think this is usually good enough.

The second problem is that my programs spawns quite a few gnuplot 
instances, and they become hard to distinguish. On linux the wxt 
terminal supports a "title" option that allows to give the windows a 
title, e.g. set terminal wxt title "test". It would be great to have 
this in the windows terminal too. I think it shouldn't be too hard to 
do, but I don't exactly know where to start. Any pointers? I guess the 
first time the title is set is in src/win/winmain.c.

Regards,

-- 
Reinier Heeres
Waalstraat 17
2515 XK Den Haag
The Netherlands

Tel: +31 6 10852639