private void PopulateItems(IEnumerable oldSource, IEnumerable newSource)
{
if (oldSource != null)
{
ItemMap.Clear();
ItemMap = null;
if (oldSource is INotifyCollectionChanged)
{
var incc = oldSource as INotifyCollectionChanged;
incc.CollectionChanged -= OnItemsCollectionChanged;
}
}
if (newSource != null)
{
if (newSource is INotifyCollectionChanged)
{
var incc = newSource as INotifyCollectionChanged;
incc.CollectionChanged += OnItemsCollectionChanged;
}
ItemMap = new Dictionary <object, ViewItem>();
foreach (var modelItem in newSource)
{
PrepareContainer(modelItem);
}
}
}