def gui_qt(*, startup_logo=False, gui_exceptions=False, force=False):
"""Start a Qt event loop in which to run the application.
NOTE: This context manager may be deprecated in the future. Prefer using
:func:`napari.run` instead.
Parameters
----------
startup_logo : bool, optional
Show a splash screen with the napari logo during startup.
gui_exceptions : bool, optional
Whether to show uncaught exceptions in the GUI, by default they will be
shown in the console that launched the event loop.
force : bool, optional
Force the application event_loop to start, even if there are no top
level widgets to show.
Notes
-----
This context manager is not needed if running napari within an interactive
IPython session. In this case, use the ``%gui qt`` magic command, or start
IPython with the Qt GUI event loop enabled by default by using
``ipython --gui=qt``.
"""
app = get_app()
splash = None
if startup_logo and app.applicationName() == 'napari':
from .widgets.qt_splash_screen import NapariSplashScreen
splash = NapariSplashScreen()
splash.close()
try:
yield app
except Exception:
notification_manager.receive_error(*sys.exc_info())
run(force=force, gui_exceptions=gui_exceptions, _func_name='gui_qt')
def test_keyboard_interupt_handler(capsys):
with pytest.raises(SystemExit):
notification_manager.receive_error(KeyboardInterrupt,
KeyboardInterrupt(), None)