private void HandleItemPropertyChanged(object?sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == null)
{
Logger.Warning(Strings.BadINotifyPropertyChangedImplementation
.InvariantFormat(typeof(T)));
return;
}
var changedArgs = new CollectionPropertyChangedEventArgs(e.PropertyName);
Changed?.Invoke(this, changedArgs);
}
private void HandleCollectionChanged(object?sender, NotifyCollectionChangedEventArgs e)
{
// These collections are null when they are considered invalid for whatever reason.
if (e.NewItems != null)
{
foreach (INotifyPropertyChanged newItem in e.NewItems)
{
newItem.PropertyChanged += HandleItemPropertyChanged;
}
}
if (e.OldItems != null)
{
foreach (INotifyPropertyChanged oldItem in e.OldItems)
{
oldItem.PropertyChanged -= HandleItemPropertyChanged;
}
}
var changedArgs =
new CollectionPropertyChangedEventArgs((CollectionPropertyChangedAction)e.Action, e.NewItems, e.OldItems);
Changed?.Invoke(this, changedArgs);
}