pygobject-gtk3-trio-guest-mode

gtriok.py

import trio
import gi


def gtk_main_trio_run(main_window, trio_func):
    from gi.repository import GLib, Gtk

    _outcome = None
    window_close_scope = None

    async def trio_context():
        nonlocal window_close_scope
        with trio.CancelScope() as window_close_scope:
            return await trio_func()
        raise RuntimeError('Window was closed')

    def done_callback(_out):
        nonlocal _outcome
        _outcome = _out
        Gtk.main_quit()
        
    main_window.connect("destroy", lambda *args: window_close_scope.cancel())
    trio.lowlevel.start_guest_run(
        trio_context,
        run_sync_soon_threadsafe=GLib.idle_add,
        done_callback=done_callback,
        host_uses_signal_set_wakeup_fd=True,
    )
    Gtk.main()
    return _outcome.unwrap()

test01.py

import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk

import trio
import gtriok

win = Gtk.Window()
pb = Gtk.ProgressBar()
win.add(pb)
win.show_all()

async def job():
    for n in range(1, 1001):
        await trio.sleep(0.02)
        pb.set_fraction(n/1000)
    await trio.sleep(0.1)
    return "OK!"

result = gtriok.gtk_main_trio_run(win, job)  # Gtk.main()
print(result)