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Use defaultdict for event callback lists

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This commit is contained in:
Ryan Schmidt 2016-05-01 10:51:17 -07:00
parent 108fe19278
commit 6bc2d40a64
1 changed files with 4 additions and 13 deletions
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17
src/events.py
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@ -1,22 +1,16 @@
# event system
from collections import defaultdict
EVENT_CALLBACKS = defaultdict(list)
EVENT_CALLBACKS = {}
def add_listener(event, callback, priority = 5):
if event not in EVENT_CALLBACKS:
EVENT_CALLBACKS[event] = []
def add_listener(event, callback, priority=5):
if (priority, callback) not in EVENT_CALLBACKS[event]:
EVENT_CALLBACKS[event].append((priority, callback))
EVENT_CALLBACKS[event].sort(key = lambda x: x[0])
def remove_listener(event, callback, priority = 5):
if event in EVENT_CALLBACKS and (priority, callback) in EVENT_CALLBACKS[event]:
if (priority, callback) in EVENT_CALLBACKS[event]:
EVENT_CALLBACKS[event].remove((priority, callback))
if event in EVENT_CALLBACKS and not EVENT_CALLBACKS[event]:
del EVENT_CALLBACKS[event]
class Event:
def __init__(self, name, data):
self.stop_processing = False
@ -25,9 +19,6 @@ class Event:
self.data = data
def dispatch(self, *args, **kwargs):
if self.name not in EVENT_CALLBACKS:
return True
for item in list(EVENT_CALLBACKS[self.name]):
item[1](self, *args, **kwargs)
if self.stop_processing: