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from gi.repository import Gio from .exitable import ExitableWithAliases class Subscription(ExitableWithAliases("unsubscribe", "disconnect")): Flags = Gio.DBusSignalFlags __slots__ = () def __init__(self, con, sender, iface, member, object, arg0, flags, callback): id = con.signal_subscribe(sender, iface, member, object, arg0, flags, callback) self._at_exit(lambda: con.signal_unsubscribe(id)) class SubscriptionMixin(object): __slots__ = () SubscriptionFlags = Subscription.Flags def subscribe(self, sender=None, iface=None, signal=None, object=None, arg0=None, flags=0, signal_fired=None): """Subscribes to matching signals. Subscribes to signals on connection and invokes signal_fired callback whenever the signal is received. To receive signal_fired callback, you need an event loop. https://github.com/LEW21/pydbus/blob/master/doc/tutorial.rst#setting-up-an-event-loop Parameters ---------- sender : string, optional Sender name to match on (unique or well-known name) or None to listen from all senders. iface : string, optional Interface name to match on or None to match on all interfaces. signal : string, optional Signal name to match on or None to match on all signals. object : string, optional Object path to match on or None to match on all object paths. arg0 : string, optional Contents of first string argument to match on or None to match on all kinds of arguments. flags : SubscriptionFlags, optional signal_fired : callable, optional Invoked when there is a signal matching the requested data. Parameters: sender, object, iface, signal, params Returns ------- Subscription An object you can use as a context manager to unsubscribe from the signal later. See Also -------- See https://developer.gnome.org/gio/2.44/GDBusConnection.html#g-dbus-connection-signal-subscribe for more information. """ callback = (lambda con, sender, object, iface, signal, params: signal_fired(sender, object, iface, signal, params.unpack())) if signal_fired is not None else lambda *args: None return Subscription(self.con, sender, iface, signal, object, arg0, flags, callback)