public virtual void SourceItemChanged(object sender, PropertyChangedEventArgs e)
{
var item = (T)sender;
var checkItem = ListHelper.CheckItem(item, query);
if (checkItem)
{
if (query.IsGlobalParameter(e.PropertyName))
{
UpdateFilter();
}
else
{
int index = IndexOf(item);
if (index < 0)
{
base.Add(item);
}
else
{
base.OnItemPropertyChanged(item, index, e);
}
}
}
else
{
int index = IndexOf(item);
if (index >= 0)
{
Remove(item, index);
}
}
}
public virtual void SourceListChanged(object sender, NotifyCollectionChangedEventArgs e)
{
T newItem = e.NewItems == null ? default(T) : e.NewItems.TypeOf <T>().FirstOrDefault();
T oldItem = e.OldItems == null ? default(T) : e.OldItems.TypeOf <T>().FirstOrDefault();
switch (e.Action)
{
case NotifyCollectionChangedAction.Reset:
UpdateFilter();
break;
case NotifyCollectionChangedAction.Move:
if (newItem != null)
{
SourceItemChanged(newItem, new PropertyChangedEventArgs(string.Empty));
}
break;
case NotifyCollectionChangedAction.Replace:
if (oldItem != null)
{
Remove(oldItem);
}
goto case NotifyCollectionChangedAction.Add;
case NotifyCollectionChangedAction.Remove:
if (oldItem != null)
{
Remove(oldItem);
}
break;
case NotifyCollectionChangedAction.Add:
if (newItem != null && ListHelper.CheckItem(newItem, query))
{
if (!query.IsEnabled && comparer == null)
{
base.Add(newItem);
}
else
{
base.Add(newItem);
}
}
break;
}
}
public bool CheckItem(object item, object typedValue, CompareType comparer, IComparer comparision)
{
return(ListHelper.CheckItem(GetValue(item), typedValue, comparer, comparision));
}
