protected virtual bool OnCollectionChanging(NotifyCollectionChangingEventArgs e)
{
if (this.update != 0 || this.itemUpdate != 0)
{
return(false);
}
this.NotifyListenersCollectionChanging(e);
return(e.Cancel);
}
protected internal void CallCollectionChanging(
object sender,
NotifyCollectionChangingEventArgs e)
{
if (this.CollectionChanging == null)
{
return;
}
this.CollectionChanging(sender, e);
}
private void predicates_CollectionChanging(object sender, NotifyCollectionChangingEventArgs e)
{
this.RebuildFilter();
}