def run_gui(config: CoreConfig, start_arg: str = None, diagnose: bool = False):
logger.info("Starting UI")
# Needed for High DPI usage of QIcons, otherwise only QImages are well scaled
QApplication.setAttribute(Qt.AA_EnableHighDpiScaling)
QApplication.setAttribute(Qt.AA_UseHighDpiPixmaps)
QApplication.setHighDpiScaleFactorRoundingPolicy(
Qt.HighDpiScaleFactorRoundingPolicy.PassThrough)
app = ParsecApp()
app.load_stylesheet()
app.load_font()
lang_key = lang.switch_language(config)
event_bus = EventBus()
with run_trio_thread() as jobs_ctx:
win = MainWindow(
jobs_ctx=jobs_ctx,
event_bus=event_bus,
config=config,
minimize_on_close=config.gui_tray_enabled and systray_available(),
)
result_queue = Queue(maxsize=1)
class ThreadSafeNoQtSignal(ThreadSafeQtSignal):
def __init__(self):
self.qobj = None
self.signal_name = ""
self.args_types = ()
def emit(self, *args):
pass
jobs_ctx.submit_job(
ThreadSafeNoQtSignal(),
ThreadSafeNoQtSignal(),
_start_ipc_server,
config,
win,
start_arg,
result_queue,
)
if result_queue.get() == "already_running":
# Another instance of Parsec already started, nothing more to do
return
if systray_available():
systray = Systray(parent=win)
win.systray_notification.connect(systray.on_systray_notification)
systray.on_close.connect(win.close_app)
systray.on_show.connect(win.show_top)
app.aboutToQuit.connect(before_quit(systray))
if config.gui_tray_enabled:
app.setQuitOnLastWindowClosed(False)
if config.gui_check_version_at_startup and not diagnose:
CheckNewVersion(jobs_ctx=jobs_ctx,
event_bus=event_bus,
config=config,
parent=win)
win.show_window(skip_dialogs=diagnose, invitation_link=start_arg)
win.show_top()
win.new_instance_needed.emit(start_arg)
def kill_window(*args):
win.close_app(force=True)
QApplication.quit()
signal.signal(signal.SIGINT, kill_window)
# QTimer wakes up the event loop periodically which allows us to close
# the window even when it is in background.
timer = QTimer()
timer.start(1000 if diagnose else 400)
timer.timeout.connect(kill_window if diagnose else lambda: None)
if diagnose:
diagnose_timer = QTimer()
diagnose_timer.start(1000)
diagnose_timer.timeout.connect(kill_window)
if lang_key:
event_bus.send(CoreEvent.GUI_CONFIG_CHANGED, gui_language=lang_key)
if diagnose:
with fail_on_first_exception(kill_window):
return app.exec_()
else:
with log_pyqt_exceptions():
return app.exec_()
async def _run_gui(app: ParsecApp,
config: CoreConfig,
start_arg: str = None,
diagnose: bool = False):
app.load_stylesheet()
app.load_font()
lang_key = lang.switch_language(config)
event_bus = EventBus()
async with run_trio_job_scheduler() as jobs_ctx:
win = MainWindow(
jobs_ctx=jobs_ctx,
quit_callback=jobs_ctx.close,
event_bus=event_bus,
config=config,
minimize_on_close=config.gui_tray_enabled and systray_available(),
)
# Attempt to run an IPC server if Parsec is not already started
try:
await jobs_ctx.nursery.start(_run_ipc_server, config, win,
start_arg)
# Another instance of Parsec already started, nothing more to do
except IPCServerAlreadyRunning:
return
# If we are here, it's either the IPC server has successfully started
# or it has crashed without being able to communicate with an existing
# IPC server. Such case is of course not supposed to happen but if it
# does we nevertheless keep the application running as a kind of
# failsafe mode (and the crash reason is logged and sent to telemetry).
# Systray is not displayed on MacOS, having natively a menu with similar functions.
if systray_available() and sys.platform != "darwin":
systray = Systray(parent=win)
win.systray_notification.connect(systray.on_systray_notification)
systray.on_close.connect(win.close_app)
systray.on_show.connect(win.show_top)
app.aboutToQuit.connect(before_quit(systray))
if config.gui_tray_enabled:
app.setQuitOnLastWindowClosed(False)
if config.gui_check_version_at_startup and not diagnose:
CheckNewVersion(jobs_ctx=jobs_ctx,
event_bus=event_bus,
config=config,
parent=win)
win.show_window(skip_dialogs=diagnose)
win.show_top()
win.new_instance_needed.emit(start_arg)
if sys.platform == "darwin":
# macFUSE is not bundled with Parsec and must be manually installed by the user
# so we detect early such need to provide a help dialogue ;-)
# TODO: provide a similar mechanism on Windows&Linux to handle mountpoint runner not available
from parsec.core.gui.instance_widget import ensure_macfuse_available_or_show_dialogue
ensure_macfuse_available_or_show_dialogue(win)
def kill_window(*args):
win.close_app(force=True)
signal.signal(signal.SIGINT, kill_window)
# QTimer wakes up the event loop periodically which allows us to close
# the window even when it is in background.
timer = QTimer()
timer.start(400)
timer.timeout.connect(lambda: None)
if diagnose:
diagnose_timer = QTimer()
diagnose_timer.start(1000)
diagnose_timer.timeout.connect(kill_window)
if lang_key:
event_bus.send(CoreEvent.GUI_CONFIG_CHANGED, gui_language=lang_key)
with QDialogInProcess.manage_pools():
if diagnose:
with fail_on_first_exception(kill_window):
await trio.sleep_forever()
else:
with log_pyqt_exceptions():
await trio.sleep_forever()