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(ƒÄV÷ ã @ s& d Z ddlZi Zddd„Zdd„ ZdS ) aõ Class-based event handlers
A light-weight event-handler framework based on event classes.
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
é NFc sT |dkr‡ fdd„S t s&tjjjtƒ ˆ t kr:|gt ˆ < nt ˆ j|ƒ |rPtS dS )z®Define an event handler for a (new-style) class.
This can be called with a class and a handler, or with just a
class and the result used as a handler decorator.
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