def done_callback(result: Outcome):
"""The app finished, quit."""
from app import UI
if isinstance(result, Error):
LOGGER.error('Trio exited with exception', exc_info=result.error)
tk_error(type(result.error), result.error, result.error.__traceback__)
else:
LOGGER.debug('Trio exited normally.')
UI.quit_application()
TK_ROOT.quit()
def check_queue():
"""Update stages from the parent process."""
nonlocal force_ontop
had_values = False
try:
while PIPE_REC.poll(): # Pop off all the values.
had_values = True
operation, scr_id, args = PIPE_REC.recv()
if operation == 'init':
# Create a new loadscreen.
is_main, title, stages = args
screen = (SplashScreen if is_main else LoadScreen)(
scr_id, title, force_ontop, stages)
SCREENS[scr_id] = screen
elif operation == 'quit_daemon':
# Shutdown.
TK_ROOT.quit()
return
elif operation == 'set_force_ontop':
[force_ontop] = args
for screen in SCREENS.values():
screen.win.attributes('-topmost', force_ontop)
else:
try:
func = getattr(SCREENS[scr_id], 'op_' + operation)
except AttributeError:
raise ValueError(f'Bad command "{operation}"!')
try:
func(*args)
except Exception:
raise Exception(operation)
while log_pipe_rec.poll():
log_window.handle(log_pipe_rec.recv())
except BrokenPipeError:
# A pipe failed, means the main app quit. Terminate ourselves.
print('BG: Lost pipe!')
TK_ROOT.quit()
return
# Continually re-run this function in the TK loop.
# If we didn't find anything in the pipe, wait longer.
# Otherwise we hog the CPU.
TK_ROOT.after(1 if had_values else 200, check_queue)