private void _coreCollection_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case System.Collections.Specialized.NotifyCollectionChangedAction.Add:
if (CollectionGroups?.Count > 0)
{
foreach (var item in CollectionGroups.OfType <SelfServiceDependencyCollectionViewGroupBase>())
{
e.NewItems?.OfType <object>().ToList().Select(x => item?.TryAddItemToGroup(x)).ToArray();
}
e.NewItems?.OfType <object>().ToList().Select(x => GroupingManager?.TryAddItemToGroup(x)).ToArray();
}
RefreshPositionValues();
break;
case System.Collections.Specialized.NotifyCollectionChangedAction.Move:
break;
case System.Collections.Specialized.NotifyCollectionChangedAction.Remove:
if (CollectionGroups?.Count > 0)
{
foreach (var item in CollectionGroups.OfType <SelfServiceDependencyCollectionViewGroupBase>())
{
e.OldItems?.OfType <object>().ToList().Select(x => item?.TryRemoveItemFromGroup(x)).Any();
}
e.NewItems?.OfType <object>().ToList().Select(x => GroupingManager?.TryRemoveItemFromGroup(x)).ToArray();
}
RefreshPositionValues();
break;
case System.Collections.Specialized.NotifyCollectionChangedAction.Replace:
break;
case System.Collections.Specialized.NotifyCollectionChangedAction.Reset:
if (CollectionGroups?.Count > 0)
{
foreach (ICollectionViewGroup item in CollectionGroups)
{
item.GroupItems?.Clear();
}
}
RefreshPositionValues();
break;
default:
break;
}
}
private void OnCollectionChangedUpdateGroups(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
for (int i = e.NewStartingIndex; i < e.NewStartingIndex + e.NewItems.Count; i++)
{
CollectionGroups.Insert(i, new CollectionViewGroup(_collection.ElementAt(i), _itemsPath));
}
break;
case NotifyCollectionChangedAction.Move:
for (int i = e.OldStartingIndex + e.OldItems.Count - 1; i >= e.OldStartingIndex; i--)
{
//TODO: Untested. This may be incorrect if OldItems.Count > 1.
var group = CollectionGroups[i];
CollectionGroups.RemoveAt(i);
CollectionGroups.Insert(i, group);
}
break;
case NotifyCollectionChangedAction.Remove:
for (int i = e.OldStartingIndex + e.OldItems.Count - 1; i >= e.OldStartingIndex; i--)
{
CollectionGroups.RemoveAt(i);
}
break;
case NotifyCollectionChangedAction.Replace:
for (int i = e.NewStartingIndex; i < e.NewStartingIndex + e.NewItems.Count; i++)
{
CollectionGroups[i] = new CollectionViewGroup(_collection.ElementAt(i), _itemsPath);
}
break;
case NotifyCollectionChangedAction.Reset:
CollectionGroups.Clear();
break;
}
}
