Name	Size	Mode	Actions
api.rst.txt	238	0644	editdlrm
api.txt	238	0644	editdlrm
classhandler.rst.txt	1093	0644	editdlrm
classhandler.txt	1093	0644	editdlrm
hacking.rst.txt	8552	0644	editdlrm
hacking.txt	8552	0644	editdlrm
index.rst.txt	624	0644	editdlrm
index.txt	624	0644	editdlrm
theory.rst.txt	493	0644	editdlrm
theory.txt	493	0644	editdlrm
usage.rst.txt	1812	0644	editdlrm
usage.txt	1812	0644	editdlrm

Class-based event handlers ========================== A light-weight event-handler framework based on event classes is provided by the ``zope.event.classhandler`` module. Handlers are registered for event classes: >>> import zope.event.classhandler >>> class MyEvent(object): ... def __repr__(self): ... return self.__class__.__name__ >>> def handler1(event): ... print("handler1 %r" % event) >>> zope.event.classhandler.handler(MyEvent, handler1) Descriptor syntax: >>> @zope.event.classhandler.handler(MyEvent) ... def handler2(event): ... print("handler2 %r" % event) >>> class MySubEvent(MyEvent): ... pass >>> @zope.event.classhandler.handler(MySubEvent) ... def handler3(event): ... print("handler3 %r" % event) Subscribers are called in class method-resolution order, so only new-style event classes are supported, and then by order of registry. >>> import zope.event >>> zope.event.notify(MySubEvent()) handler3 MySubEvent handler1 MySubEvent handler2 MySubEvent