private void OnCollectionChanged(EventArgs e)
{
NotifyCollectionChangedEventArgs collectionArgs = (NotifyCollectionChangedEventArgs)e;
switch (collectionArgs.Action)
{
case NotifyCollectionChangedAction.Remove:
try {
Remove.Raise(this, collectionArgs.OldStartingIndex, collectionArgs.OldItems.Cast <T>());
CollectionChanged.Raise(this, collectionArgs);
} finally {
// We unsubscribe the items after we raise the events
// so any processing that needs to happen on the items happens
UnsubscribeItems(collectionArgs.OldItems.Cast <T>());
}
break;
case NotifyCollectionChangedAction.Add:
SubscribeItems(collectionArgs.NewItems.Cast <T>());
Add.Raise(this, collectionArgs.NewStartingIndex, collectionArgs.NewItems.Cast <T>());
CollectionChanged.Raise(this, collectionArgs);
break;
case NotifyCollectionChangedAction.Replace:
SubscribeItems(collectionArgs.NewItems.Cast <T>());
try {
Replace.Raise(
this,
collectionArgs.OldItems.Cast <T>(),
collectionArgs.NewStartingIndex,
collectionArgs.NewItems.Cast <T>());
CollectionChanged.Raise(this, collectionArgs);
} finally {
UnsubscribeItems(collectionArgs.OldItems.Cast <T>());
}
break;
#if !SILVERLIGHT
case NotifyCollectionChangedAction.Move:
Move.Raise(
this,
collectionArgs.OldStartingIndex,
collectionArgs.OldItems.Cast <T>(),
collectionArgs.NewStartingIndex,
collectionArgs.NewItems.Cast <T>());
CollectionChanged.Raise(this, collectionArgs);
break;
#endif
case NotifyCollectionChangedAction.Reset:
try {
Reset.Raise(this);
CollectionChanged.Raise(this, collectionArgs);
} finally {
ClearSubscriptions();
}
break;
}
}