protected void AddWeakEventListener(INotifyPropertyChanged _source, PropertyChangedEventHandler _handler)
{
if (null == _source)
{
throw new ArgumentNullException(nameof(_source));
}
if (null == _handler)
{
throw new ArgumentNullException(nameof(_handler));
}
var __listener = new PropertyChangedEventListener(_source, _handler);
m_PropertyChangedListeners.Add(__listener);
PropertyChangedEventManager.AddListener(_source, __listener, "");
}
protected void RemoveWeakEventListener(INotifyPropertyChanged _source, PropertyChangedEventHandler _handler)
{
if (null == _source)
{
throw new ArgumentNullException(nameof(_source));
}
if (null == _handler)
{
throw new ArgumentNullException(nameof(_handler));
}
PropertyChangedEventListener __listener = m_PropertyChangedListeners.LastOrDefault(l => l.Source == _source && l.Handler == _handler);
if (null != __listener)
{
m_PropertyChangedListeners.Remove(__listener);
PropertyChangedEventManager.RemoveListener(_source, __listener, string.Empty);
}
}