68 lines
1.5 KiB
Python
68 lines
1.5 KiB
Python
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"""
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asynckivy
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=========
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Copyright (c) 2019 Nattōsai Mitō
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GitHub -
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https://github.com/gottadiveintopython
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GitHub Gist -
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https://gist.github.com/gottadiveintopython/5f4a775849f9277081c396de65dc57c1
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"""
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__all__ = ("start", "sleep", "event")
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import types
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from collections import namedtuple
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from functools import partial
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from kivy.clock import Clock
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CallbackParameter = namedtuple("CallbackParameter", ("args", "kwargs"))
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def start(coro):
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def step(*args, **kwargs):
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try:
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coro.send(CallbackParameter(args, kwargs))(step)
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except StopIteration:
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pass
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try:
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coro.send(None)(step)
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except StopIteration:
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pass
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@types.coroutine
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def sleep(duration):
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# The partial() here looks meaningless. But this is needed in order
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# to avoid weak reference.
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param = yield lambda step_coro: Clock.schedule_once(
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partial(step_coro), duration
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)
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return param.args[0]
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class event:
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def __init__(self, ed, name):
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self.bind_id = None
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self.ed = ed
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self.name = name
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def bind(self, step_coro):
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self.bind_id = bind_id = self.ed.fbind(self.name, self.callback)
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assert bind_id > 0 # check if binding succeeded
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self.step_coro = step_coro
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def callback(self, *args, **kwargs):
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self.parameter = CallbackParameter(args, kwargs)
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ed = self.ed
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ed.unbind_uid(self.name, self.bind_id)
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self.step_coro()
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def __await__(self):
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yield self.bind
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return self.parameter
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