public void UpdateNumberOfItems_DeepInTree_UpdatesParentNodes()
{
CreateThreeLevelTree(1);
_target.UpdateItemsInNode(_leaves[2], 3);
Assert.AreEqual(3, _leaves[2].ItemsInNode);
Assert.AreEqual(4, _leaves[1].Above.ItemsInNode);
Assert.AreEqual(7, _headers[0].ItemsInNode);
}
public void OnSubCollectionChanged(object sender, NotifyCollectionChangedEventArgs args)
{
IList <TResult> collection = (IList <TResult>)sender;
var nodesForCollection = _collectionToNode[collection];
for (int i = 0; i < nodesForCollection.Count; i++)
{
_collectionIndex.UpdateItemsInNode(nodesForCollection[i], collection.Count);
}
if (nodesForCollection.Count == 1)
{
var nodeForCollection = _collectionToNode[collection][0];
int indexOfNodeInOutput = _collectionIndex.GetIndex(nodeForCollection);
switch (args.Action)
{
case NotifyCollectionChangedAction.Add:
FireAddList(args.NewItems, indexOfNodeInOutput + args.NewStartingIndex);
break;
#if !SILVERLIGHT
case NotifyCollectionChangedAction.Move:
FireMove(args.NewItems, indexOfNodeInOutput + args.NewStartingIndex, indexOfNodeInOutput + args.OldStartingIndex);
break;
#endif
case NotifyCollectionChangedAction.Remove:
FireRemoveList(args.OldItems, indexOfNodeInOutput + args.OldStartingIndex);
break;
case NotifyCollectionChangedAction.Replace:
FireReplaceList(args.NewItems, args.OldItems, indexOfNodeInOutput + args.NewStartingIndex);
break;
case NotifyCollectionChangedAction.Reset:
FireReset();
break;
}
}
else
{
FireReset();
}
}
