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https://github.com/avatao-content/baseimage-tutorial-framework
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30 lines
884 B
Python
30 lines
884 B
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
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# All Rights Reserved. See LICENSE file for details.
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from functools import partial
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from tfw.decorators import lazy_property
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class CallbackMixin:
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@lazy_property
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def _callbacks(self):
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return []
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def subscribe_callback(self, callback, *args, **kwargs):
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"""
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Subscribe a callable to invoke once an event is triggered.
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:param callback: callable to be executed on events
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:param args: arguments passed to callable
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:param kwargs: kwargs passed to callable
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"""
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fun = partial(callback, *args, **kwargs)
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self._callbacks.append(fun)
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def unsubscribe_callback(self, callback):
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self._callbacks.remove(callback)
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def _execute_callbacks(self, *args, **kwargs):
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for callback in self._callbacks:
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callback(*args, **kwargs)
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