71 lines
1.9 KiB
Python
71 lines
1.9 KiB
Python
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from abc import ABC, abstractmethod
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import logging
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logger = logging.getLogger(__name__)
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class ActiveListListener(ABC):
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@abstractmethod
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def onIndexChanged(self, index, newValue):
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pass
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@abstractmethod
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def onAppend(self, newValue):
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pass
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@abstractmethod
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def onDelete(self, index):
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pass
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class ActiveList:
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def __init__(self, elements: list = None):
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self.delegate = elements.copy() if elements is not None else []
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self.listeners = []
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def addListener(self, listener: ActiveListListener):
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if listener in self.listeners:
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return
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self.listeners.append(listener)
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def removeListener(self, listener: ActiveListListener):
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if listener not in self.listeners:
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return
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self.listeners.remove(listener)
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def append(self, value):
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self.delegate.append(value)
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for listener in self.listeners:
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try:
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listener.onAppend(value)
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except Exception:
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logger.exception("Exception during onAppend notification")
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def remove(self, value):
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self.__delitem__(self.delegate.index(value))
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def __setitem__(self, key, value):
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self.delegate[key] = value
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for listener in self.listeners:
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try:
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listener.onIndexChanged(key, value)
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except Exception:
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logger.exception("Exception during onKeyChanged notification")
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def __delitem__(self, key):
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del self.delegate[key]
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for listener in self.listeners:
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try:
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listener.onDelete(key)
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except Exception:
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logger.exception("Exception during onDelete notification")
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def __getitem__(self, key):
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return self.delegate[key]
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def __len__(self):
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return len(self.delegate)
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def __iter__(self):
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return self.delegate.__iter__()
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