onyx-and-iris 92aead8754 gui rewritten with builder classes and observables
gui rewritten with builder classes and observables
2022-05-10 20:34:29 +01:00

33 lines
779 B
Python

class Subject:
def __init__(self):
"""list of current observers"""
self._observables = []
def notify(self, modifier=None):
"""Alert the observers"""
for observer in self._observables:
observer.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):
self._observables.clear()