def _check_input_handlers(cls):
unbound = [
signal.name for _, signal in getmembers(cls.Inputs, Input)
if not signal.handler
]
if unbound:
raise ValueError("unbound signal(s) in {}: {}".format(
cls.__name__, ", ".join(unbound)))
missing_handlers = [
signal.handler for signal in cls.inputs
if not hasattr(cls, signal.handler)
]
if missing_handlers:
raise ValueError("missing handlers in {}: {}".format(
cls.__name__, ", ".join(missing_handlers)))
def get_signals(cls, direction, ignore_old_style=False):
"""
Return a list of `InputSignal` or `OutputSignal` needed for the
widget description. For old-style signals, the method returns the
original list. New-style signals are collected into a list.
Parameters
----------
direction (str): `"inputs"` or `"outputs"`
Returns
-------
list of `InputSignal` or `OutputSignal`
"""
old_style = cls.__dict__.get(direction, None)
if old_style and not ignore_old_style:
return old_style
signal_class = getattr(cls, direction.title())
signals = [signal for _, signal in getmembers(signal_class, _Signal)]
return list(sorted(signals, key=lambda s: s._seq_id))
def _bind_signals(self):
for direction, signal_type in (("Inputs", Input), ("Outputs", Output)):
bound_cls = getattr(self, direction)()
for name, signal in getmembers(bound_cls, signal_type):
setattr(bound_cls, name, signal.bound_signal(self))
setattr(self, direction, bound_cls)
def _bind_outputs(self):
bound_cls = self.Outputs()
for name, signal in getmembers(bound_cls, Output):
setattr(bound_cls, name, signal.bound_signal(self))
setattr(self, "Outputs", bound_cls)