Re: gplt_x11 ignores SIGINT and SIGTSTP. Why?

[Dima K. <gn...@di...>]

Ethan A Merritt <me...@uw...> writes:

> On Saturday, 3 September 2022 13:12:11 PDT Dima Kogan wrote:
>> >> Let's say the request was "I want a gnuplot-powered plotting widget in
>> >> my GTK application". What would you suggest in that case?
>> >
>> > Isn't that what wxt is? 
>> 
>> Is it? If I was building a GTK application (not wx; plain GTK), could I
>> use the gnuplot wxt terminal as a widget in that application? The docs
>> don't make that clear, and definitely don't tell you how to do that.
>
> You seem to be asking for a cross-platform UI with widgets based on gtk.
> What I meant was that wxWidgets claims to be exactly that, although it
> doesn't use (or at least doesn't default to using) gtk on all the 
> supported platforms.  So if you base your UI on wxWidgets, then gnuplot's
> wxt terminal is a natural fit.

I don't actually write GTK applications, so *I* don't want this. But
somebody could be writing a GTK application, and they could want a
plotting widget. As I understand it, this isn't something that gnuplot
can provide today, unless that person rewrites their application with
wxt.


>> Similarly, what if I was building a Qt application? "help qt" mentions a
>> "widget" option, which maybe provides this function, but that option
>> isn't documented, so I don't know what it does.
>
> In the file .../src/Makefile.am is a commented out section that builds
> a simple Qt app with embedded gnuplot windows.  
>
> Edit that file to un-comment the section and re-run
>     ./prepare; ./configure; make
>     ./embed_example

Cool! If this works, should building this be enabled by default?

I just tried it, and it doesn't work right for me. The embed_example
program builds. Running it pops up a window that disappears immediately.
Then I get the shell prompt back implying that the embed_example
application has exited. BUT it keeps running in the background
apparently. And I do get a qt window with a plot maybe a minute later.
Sometimes. Sometimes the background process just exits after a few
minutes without showing me a plot.