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__callbacks = {}
def register(event, callback, *args, **kwargs):
cb = callback
if args or kwargs:
cb = lambda: callback(*args, **kwargs)
__callbacks.setdefault(event, []).append(cb)
def register_exclusive(event, callback, *args, **kwargs):
cb = callback
if args or kwargs:
cb = lambda: callback(*args, **kwargs)
__callbacks[event] = [cb]
def unregister(event):
if event in __callbacks:
del __callbacks[event]
def clear():
__callbacks.clear()
def trigger(event, *args, **kwargs):
cb = __callbacks.get(event, [])
if len(cb) == 0:
return False
for callback in cb:
if args or kwargs:
callback(*args, **kwargs)
else:
callback()
return True
# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
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