Python gi.repository.GLib.MainLoop() Examples

def assert_valid_output_file(output_video_location):
    '''
    Given a file, validates it is a video (mp4) file
    '''
    import gi
    gi.require_version('Gst', '1.0')
    from gi.repository import Gst, GLib

    Gst.init(None)
    mainloop = GLib.MainLoop()

    # We create a pipeline so that we can read the file and check it:
    pipeline = Gst.ElementFactory.make("playbin")
    pipeline.set_property('uri','file://'+output_video_location)
    playsink = pipeline.get_by_name('playsink')
    playsink.set_property('video-sink', Gst.ElementFactory.make('fakesink'))
    pipeline.set_state(Gst.State.PAUSED)

    def after_a_second():
        assert pipeline.get_state(0).state == Gst.State.PAUSED
        element = pipeline.get_by_name('inputselector1')
        caps = element.get_static_pad('src').get_current_caps()
        assert caps.to_string() == 'audio/x-raw, format=(string)F32LE, layout=(string)interleaved, rate=(int)48000, channels=(int)2, channel-mask=(bitmask)0x0000000000000003'

        element = pipeline.get_by_name('inputselector0')
        caps = element.get_static_pad('src').get_current_caps()
        assert caps.to_string() == 'video/x-raw, format=(string)NV12, width=(int)640, height=(int)360, interlace-mode=(string)progressive, multiview-mode=(string)mono, multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono, pixel-aspect-ratio=(fraction)1/1, chroma-site=(string)jpeg, colorimetry=(string)bt601, framerate=(fraction)30/1'

        pipeline.set_state(Gst.State.NULL)
        mainloop.quit()

    GLib.timeout_add(1000, after_a_second)
    mainloop.run() 

def run(self):
            self.loop = GLib.MainLoop()

            if self.config.notifications:
                try:
                    notify2.init("pantalaimon", mainloop=self.loop)
                    self.notifications = True
                except dbus.DBusException:
                    logger.error(
                        "Notifications are enabled but no notification "
                        "server could be found, disabling notifications."
                    )
                    self.notifications = False

            GLib.timeout_add(100, self.message_callback)
            if not self.loop:
                return

            self.loop.run() 

def main():
    loop = asyncio.get_event_loop()
    glib_loop = GLib.MainLoop()

    try:
        panctl = PanCtl()
    except GLib.Error as e:
        print(f"Error, {e}")
        sys.exit(-1)

    fut = loop.run_in_executor(None, glib_loop.run)

    try:
        loop.run_until_complete(panctl.loop())
    except KeyboardInterrupt:
        pass

    GLib.idle_add(glib_loop.quit)
    loop.run_until_complete(fut) 

def run(self):
        logging.info('D-Bus process started')
        GLib.threads_init()  # allow threads in GLib
        GLib.idle_add(self._idleQueueSync)

        DBusGMainLoop(set_as_default=True)
        dbusService = SessionDBus(self.taskQueue, self.resultQueue)

        try:
            GLib.MainLoop().run()
        except KeyboardInterrupt:
            logging.debug("\nThe MainLoop will close...")
            GLib.MainLoop().quit()
        return 

def _test_run_screen_event_loop(self):
        """
        >>> w = _refl("widget")
        >>> scr = _refl("screen")
        >>> scr.get_cols_rows_rval = (10, 5)
        >>> scr.get_input_rval = [], []
        >>> ml = MainLoop(w, screen=scr)
        >>> def stop_now(loop, data):
        ...     raise ExitMainLoop()
        >>> handle = ml.set_alarm_in(0, stop_now)
        >>> try:
        ...     ml._run_screen_event_loop()
        ... except ExitMainLoop:
        ...     pass
        screen.get_cols_rows()
        widget.render((10, 5), focus=True)
        screen.draw_screen((10, 5), None)
        screen.set_input_timeouts(0)
        screen.get_input(True)
        """ 

def _test_run(self):
        """
        >>> w = _refl("widget")   # _refl prints out function calls
        >>> w.render_rval = "fake canvas"  # *_rval is used for return values
        >>> scr = _refl("screen")
        >>> scr.get_input_descriptors_rval = [42]
        >>> scr.get_cols_rows_rval = (20, 10)
        >>> scr.started = True
        >>> scr._urwid_signals = {}
        >>> evl = _refl("event_loop")
        >>> evl.enter_idle_rval = 1
        >>> evl.watch_file_rval = 2
        >>> ml = MainLoop(w, [], scr, event_loop=evl)
        >>> ml.run()    # doctest:+ELLIPSIS
        screen.set_mouse_tracking()
        screen.get_cols_rows()
        widget.render((20, 10), focus=True)
        screen.draw_screen((20, 10), 'fake canvas')
        screen.get_input_descriptors()
        event_loop.watch_file(42, <bound method ...>)
        event_loop.enter_idle(<bound method ...>)
        event_loop.run()
        event_loop.remove_enter_idle(1)
        event_loop.remove_watch_file(2)
        >>> scr.started = False
        >>> ml.run()    # doctest:+ELLIPSIS
        screen.run_wrapper(<bound method ...>)
        """ 

def __init__(self, logger=None, c_extension=True, ignored_ep_filter=None):

        # logger
        self.logger = logger or logging.getLogger(__name__)

        # Main loop for events
        self.loop = GLib.MainLoop()

        # Connect to session bus
        self.bus = SystemBus()

        # Manage sink list
        self.sink_manager = SinkManager(
            bus=self.bus,
            on_new_sink_cb=self.on_sink_connected,
            on_sink_removal_cb=self.on_sink_disconnected,
            on_stack_started=self.on_stack_started,
            logger=self.logger,
        )

        self.ignore_ep_filter = ignored_ep_filter

        # Register for packet on Dbus
        if c_extension:
            self.logger.info("Starting dbus client with c extension")
            self.c_extension_thread = DbusEventHandler(
                self._on_data_received_c, self.logger
            )
        else:
            self.logger.info("Starting dbus client without c extension")
            # Subscribe to all massages received from any sink (no need for
            # connected sink for that)
            self.bus.subscribe(
                signal="MessageReceived",
                object="/com/wirepas/sink",
                signal_fired=self._on_data_received,
            )

            self.c_extension_thread = None 

def __init__(self):
        dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)

        try:
            bus = dbus.SessionBus()
            player = bus.get_object(self.dbus_dest, self.dbus_path)
            self.iface = dbus.Interface(player, "org.freedesktop.DBus.Properties")
            self.update_metadata()
        except DBusException:
            log.error("Failed to connect to Spotify. (Maybe it's not running yet?)")
            sys.exit(1)
            pass

        self.track = self.get_track(self.metadata)
        self.trackid = self.metadata.get(dbus.String(u'mpris:trackid'))
        self.playbackstatus = self.iface.Get(self.mpris_player_string, "PlaybackStatus")

        self.iface.connect_to_signal("PropertiesChanged", self.on_playing_uri_changed)

        class DBusListenerThread(Thread):
            def run(self2):
                # Run the GLib event loop to process DBus signals as they arrive
                self.glibloop = GLib.MainLoop()
                self.glibloop.run()

                # run() blocks this thread. This gets printed after it's dead.
                log.info(f"[{app_name}] GLib Loop thread killed")

        dbuslistener = DBusListenerThread()
        dbuslistener.start()

        log.info(f"[{app_name}] Spotify DBus listener started")

        log.info(f"[{app_name}] Current song: " + self.track)
        log.info(f"[{app_name}] Current state: " + self.playbackstatus)

    # TODO: this is a dirty solution (uses cmdline instead of python for now) 

def __init__(self, adapter_addr, device_addr):
        """Default initialiser.

        Creates object for the specified remote Bluetooth device.
        This is on the specified adapter specified.

        :param adapter_addr: Address of the local Bluetooth adapter.
        :param device_addr: Address of the remote Bluetooth device.
        """
        self.bus = dbus.SystemBus()
        dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
        self.mainloop = GObject.MainLoop()

        device_path = dbus_tools.get_dbus_path(adapter_addr, device_addr)
        if not device_path:
            raise ValueError("Cannot find a device: " + device_addr +
                             " using adapter: " + adapter_addr)

        self.remote_device_path = device_path
        self.remote_device_obj = self.bus.get_object(
            constants.BLUEZ_SERVICE_NAME,
            self.remote_device_path)
        self.remote_device_methods = dbus.Interface(
            self.remote_device_obj,
            constants.DEVICE_INTERFACE)
        self.remote_device_props = dbus.Interface(self.remote_device_obj,
                                                  dbus.PROPERTIES_IFACE) 

def _unthreaded_subscribe_to_signals(
        partition_status_callback, copy_status_callback, boot_status_callback):
    drive_copier.PartitionStatus.connect(partition_status_callback)
    drive_copier.CopyStatus.connect(copy_status_callback)
    drive_copier.BootStatus.connect(boot_status_callback)
    loop = GLib.MainLoop()
    loop.run() 

def run():
    """Function which starts the daemon and publishes the
    :class:`~weresync.daemon.copier.DriveCopier` over dbus."""
    utils.start_logging_handler(DEFAULT_DAEMON_LOG_LOCATION)
    utils.enable_localization()
    with SystemBus() as bus:
        with bus.publish("net.manilas.weresync.DriveCopier", DriveCopier()):
            GLib.idle_add(lambda: LOGGER.debug("Starting GLib loop"))
            loop = GLib.MainLoop()
            loop.run() 

def __init__(self, bus, path):
        self.loop = GLib.MainLoop()

        interface_info = Gio.DBusNodeInfo.new_for_xml(self.__doc__).interfaces[0]

        method_outargs = {}
        method_inargs = {}
        for method in interface_info.methods:
            method_outargs[method.name] = '(' + ''.join([arg.signature for arg in method.out_args]) + ')'
            method_inargs[method.name] = tuple(arg.signature for arg in method.in_args)

        self.method_inargs = method_inargs
        self.method_outargs = method_outargs

        bus.register_object(object_path=path, interface_info=interface_info, method_call_closure=self.on_method_call) 

def __init__(self):
        from gi.repository import GLib
        self.GLib = GLib
        self._alarms = []
        self._watch_files = {}
        self._idle_handle = 0
        self._glib_idle_enabled = False # have we called glib.idle_add?
        self._idle_callbacks = {}
        self._loop = GLib.MainLoop()
        self._exc_info = None
        self._enable_glib_idle() 

def _test_process_input(self):
        """
        >>> w = _refl("widget")
        >>> w.selectable_rval = True
        >>> scr = _refl("screen")
        >>> scr.get_cols_rows_rval = (10, 5)
        >>> ml = MainLoop(w, [], scr)
        >>> ml.process_input(['enter', ('mouse drag', 1, 14, 20)])
        screen.get_cols_rows()
        widget.selectable()
        widget.keypress((10, 5), 'enter')
        widget.mouse_event((10, 5), 'mouse drag', 1, 14, 20, focus=True)
        True
        """ 

def __init__(self, loop=None):
        self.loop = loop or GLib.MainLoop() 

def __init__(self, *, context=None, application=None):
        self._application = application
        self._running = False
        self._argv = None

        super().__init__(context)
        if application is None:
            self._mainloop = GLib.MainLoop(self._context) 

def gobject_mainloop():
        gi.require_version('Gst', '1.0')
        from gi.repository import GLib
        GStreamerPipeline._mainloop = GLib.MainLoop()
        try:
            GStreamerPipeline._mainloop.run()
        except KeyboardInterrupt:
            pass 

def _run(self):
        super(SignalTextInterface, self)._run()

        bus = SystemBus()

        self.signal = bus.get('org.asamk.Signal')
        self.signal.onMessageReceived = self.handle_message
        self.loop = GLib.MainLoop()

        logger.debug("Signal Interface Running")

        self.loop.run() 

def pomodoro_daemon():
    pomodoro = get_pomodoro_proxy()
    pomodoro.StateChanged.connect(handle_state)
    GLib.MainLoop().run() 

def run(self):
        """
        Run the Sniffer main loop.
        """
        if self.adapter is not None:
            self._log.debug("Clearing the BlueZ device registry.")
            for path, _ in get_known_devices():
                self.adapter.RemoveDevice(path)

            self._log.debug("Registering the signals InterfacesAdded and PropertiesChanged.")
            bus = pydbus.SystemBus()
            bus.subscribe(
                sender=SERVICE_NAME,
                iface=OBJECT_MANAGER_INTERFACE,
                signal="InterfacesAdded",
                signal_fired=self._cb_interfaces_added
            )
            bus.subscribe(
                sender=SERVICE_NAME,
                iface=OBJECT_MANAGER_INTERFACE,
                signal="InterfacesRemoved",
                signal_fired=self._cb_interfaces_removed
            )
            bus.subscribe(
                sender=SERVICE_NAME,
                iface=PROPERTIES_INTERFACE,
                signal="PropertiesChanged",
                arg0=DEVICE_INTERFACE,
                signal_fired=self._cb_properties_changed
            )

            self._log.debug("Running the main loop.")
            if self.output_path is not None and self.backup_interval > 0:
                GLib.timeout_add_seconds(self.backup_interval, self._cb_backup_registry)
            if self.attempt_connection:
                GLib.timeout_add_seconds(self.queueing_interval, self._cb_connect_check)
            loop = GLib.MainLoop()
            loop.run()
        else:
            raise ValueError("Sniffer.run can only be called in a context "
                             "(e.g. `with Sniffer(...) as s: s.run()`)") 

def _update(self, timeout=False):
        """
        >>> w = _refl("widget")
        >>> w.selectable_rval = True
        >>> w.mouse_event_rval = True
        >>> scr = _refl("screen")
        >>> scr.get_cols_rows_rval = (15, 5)
        >>> scr.get_input_nonblocking_rval = 1, ['y'], [121]
        >>> evl = _refl("event_loop")
        >>> ml = MainLoop(w, [], scr, event_loop=evl)
        >>> ml._input_timeout = "old timeout"
        >>> ml._update()    # doctest:+ELLIPSIS
        event_loop.remove_alarm('old timeout')
        screen.get_input_nonblocking()
        event_loop.alarm(1, <function ...>)
        screen.get_cols_rows()
        widget.selectable()
        widget.keypress((15, 5), 'y')
        >>> scr.get_input_nonblocking_rval = None, [("mouse press", 1, 5, 4)
        ... ], []
        >>> ml._update()
        screen.get_input_nonblocking()
        widget.mouse_event((15, 5), 'mouse press', 1, 5, 4, focus=True)
        >>> scr.get_input_nonblocking_rval = None, [], []
        >>> ml._update()
        screen.get_input_nonblocking()
        """
        if self._input_timeout is not None and not timeout:
            # cancel the timeout, something else triggered the update
            self.event_loop.remove_alarm(self._input_timeout)
        self._input_timeout = None

        max_wait, keys, raw = self.screen.get_input_nonblocking()
        
        if max_wait is not None:
            # if get_input_nonblocking wants to be called back
            # make sure it happens with an alarm
            self._input_timeout = self.event_loop.alarm(max_wait, 
                lambda: self._update(timeout=True)) 

        keys = self.input_filter(keys, raw)

        if keys:
            self.process_input(keys)
            if 'window resize' in keys:
                self.screen_size = None