为python写了一个事件机制 - 小川 - 博客园

为python写了一个事件机制 本人新学PYTHON不久，问了很多人都说PYTHON没有事件机制。。 偶觉得很麻烦，就自己写了一个。

要广播事件就必须继承 EventDispatcher类, 广播的事件必须是Aevent或者其子类。

Code

class EventDispatcher(object):

def __init__(self):

self.events = {}

def addEventListener(self,eventType,listenFunction):

if not self.events.has_key(eventType):

self.events[eventType] = []

eventList = self.events[eventType]

eventList.append(listenFunction)

def removeEventListener(self,eventType,ListenFunction):

if not self.events.has_key(eventType):

return

eventList = self.events[eventType]

eventList.remove(ListenFunction)

def dispatchEvent(self,event):

if not self.events.has_key(event.type):

return

eventList = self.events[event.type]

for fun in eventList:

fun()

def __del__(self):

keys = self.events.keys

for key in keys:

eventList = self.events[key]

for fun in eventList:

del fun

class Aevent(object):

def __init__(self,Type):

self.type = Type

使用示例代码


class Obj(EventDispatcher):

def __init__(self):

self.i = 1

EventDispatcher.__init__(self)

def addI(self):

self.i = 1 + self.i

EventDispatcher.dispatchEvent(self,Aevent('iadd'))

def onIadd():

print o.i

o = Obj()

o.addEventListener('iadd',onIadd)

o.addI() #output 2

o.addI() #output 3

o.removeEventListener('iadd',onIadd)

o.addI() #no output