i XdZddlmZddlmZmZmZddgZGddZGddZ y) a Dirt Simple Events A Dispatcher (or a subclass of Dispatcher) stores event handlers that are 'fired' simple event objects when interesting things happen. Create a dispatcher: >>> d = Dispatcher() Now create a handler for the event and subscribe it to the dispatcher to handle Event events. A handler is a simple function or method that accepts the event as an argument: >>> def handler1(event): print(repr(event)) >>> d.subscribe(Event, handler1) # doctest: +ELLIPSIS Now dispatch a new event into the dispatcher, and see handler1 get fired: >>> d.dispatch(Event(foo='bar', data='yours', used_by='the event handlers')) ) annotations)AnyDictOptionalEvent DispatcherceZdZdZdZdZy)ra An event is a container for attributes. The source of an event creates this object, or a subclass, gives it any kind of data that the events handlers need to handle the event, and then calls notify(event). The target of an event registers a function to handle the event it is interested with subscribe(). When a sources calls notify(event), each subscriber to that event will be called in no particular order. c :|jj|yN)__dict__update)selfkws )sortedr keys)rattrsas r__repr__zEvent.__repr__1s4t}}))+,9>-?Aa-?AA-?s 8N)__name__ __module__ __qualname____doc__rrrrrr!s !Brc:eZdZUdZdZded<d dZdZdZdZ y) rz] An object that can dispatch events to a privately managed group of subscribers. NzOptional[Dict[Any, Any]] _dispatch_mapc||_|Sr r )ramaps rset_mapzDispatcher.set_map>s! rc|jSr r")rs rget_mapzDispatcher.get_mapBs!!!rc|j|ji|jj|d}||g}n|j|||j|<|S)zuSubscribe the given handler to an event_type. Handlers are called in the order they are subscribed. N)r r$getappend)r event_typehandlerlsts r subscribezDispatcher.subscribeEsa    % LL   $$Z6 ;)C JJw ),:& rc|jN|jjt|d}|tdt|z|D] }|| yy)zPDispatch the given event to the subscribed handlers for the event's typeNzunknown event type: %s)r r(type ValueError)reventr,l_s rdispatchzDispatcher.dispatchUs\    )$$((ed;C{ !9DK!GHH5  *r)r#zDict[Any, Any]) rrrrr __annotations__r$r&r-r3rrrrr6s( /3M+2" rN) r __future__rtypingrrr__all__rrrrrr8s52#&& L !BB*''r