Re: [Pyfltk-user] Quitting a pyfltk application with Ctrl-c

[Robert A. <ro...@gm...>]

On Thu, Jun 26, 2025 at 3:30 PM Dima Kogan <di...@se...> wrote:
>
> Hello.
>
> This is another issue i just looked into, that I would appreciate some
> pointers for. I have this trivial pyfltk program:
>
>   #!/usr/bin/python3
>
>   from fltk import *
>
>   window = Fl_Window(100,200,"xxx")
>   window.end()
>   window.show()
>
>   Fl.run()
>
> I run it. Instead of hitting Escape, I go back to the console, and hit
> Ctrl-c. I expect the program to exit, but it ignores the C-c, and does
> nothing. If I go back to the application, and hit Escape, it does exit,
> but also says this:
>

Tried it with C++ fltk hello world, and sending sigint with ctrl-c
does indeed kill the process. Also tried it with tkinter (built-in
python gui). Tkinter does NOT kill the process until you switch focus
back to the gui window. I am, however, skeptical that this issue
should be the responsibility of pyfltk to fix. To me, this seems more
like a python issue.  BTW are you trying to send a pyfltk process
SIGINT from another process (IPC)?

Tkinter seems to have had the same issue here
https://stackoverflow.com/questions/39840815/exiting-a-tkinter-app-with-ctrl-c-and-catching-sigint