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""" |
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Enarksh |
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Copyright 2013-2016 Set Based IT Consultancy |
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Licence MIT |
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""" |
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import weakref |
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class Event: |
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""" |
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Class for events. |
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""" |
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# ------------------------------------------------------------------------------------------------------------------ |
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event_controller = None |
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""" |
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The event controller. |
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:type: None|enarksh.event.EventController.EventController |
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""" |
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# ------------------------------------------------------------------------------------------------------------------ |
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def __init__(self, source): |
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""" |
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Object constructor. |
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:param T source: The object that generates this event. |
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""" |
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self._source = source |
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""" |
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The object that generates this event. |
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:type: enarksh.event.EventActor.EventActor |
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""" |
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self.ref = weakref.ref(self, Event.event_controller.internal_unregister_event_ref) |
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""" |
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The weak reference to this event. |
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:type: weakref |
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""" |
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# Register this event as an event in the current program. |
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Event.event_controller.internal_register_event(self) |
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# ------------------------------------------------------------------------------------------------------------------ |
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@property |
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def source(self): |
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""" |
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Returns the object that fires this event. |
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:rtype: enarksh.event.EventActor.EventActor |
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""" |
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return self._source |
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# ------------------------------------------------------------------------------------------------------------------ |
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def fire(self, event_data=None): |
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""" |
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Fires this event. That is, the event is put on the event queue of the event controller. |
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Normally this method is called by the source of this event. |
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:param * event_data: Additional data supplied by the event source. |
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""" |
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Event.event_controller.internal_queue_event(self, event_data) |
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# ------------------------------------------------------------------------------------------------------------------ |
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def register_listener(self, listener, listener_data=None): |
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""" |
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Registers an object as a listener for this event. |
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:param callable listener: An object that listen for an event. |
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:param * listener_data: Additional data supplied by the listener destination. |
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""" |
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Event.event_controller.internal_register_listener(self, listener, listener_data) |
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# ---------------------------------------------------------------------------------------------------------------------- |
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SetBased /
py-enarksh
