voicemeeter-compact/vmcompact/subject.py

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class Subject:
def __init__(self):
"""list of current observers"""
self._observables = []
def notify(self, modifier=None):
"""run callbacks on update"""
for observer in self._observables:
observer.on_update()
def add(self, observer):
"""adds an observer to observables"""
if observer not in self._observables:
self._observables.append(observer)
def remove(self, observer):
"""removes an observer from observables"""
try:
self._observables.remove(observer)
except ValueError:
pass
def get(self) -> list:
"""returns the current observables"""
return self._observables
def clear(self):
"""clears the observables list"""
self._observables.clear()