public SelectionScope RegisterSelectionScope([NotNull] Func <AbsoluteId, object> idToObject, [NotNull] Func <object, AbsoluteId?> objectToId, [NotNull] params INotifyCollectionChanged[] collections)
{
if (idToObject == null)
{
throw new ArgumentNullException(nameof(idToObject));
}
if (objectToId == null)
{
throw new ArgumentNullException(nameof(objectToId));
}
if (collections == null)
{
throw new ArgumentNullException(nameof(collections));
}
var scope = new SelectionScope(collections, idToObject, objectToId);
foreach (var collection in scope.Collections)
{
collection.CollectionChanged += CollectionChanged;
}
scopes.Add(scope);
// Update history to let it know about this collection
foreach (var operation in stack.RetrieveAllTransactions().SelectMany(x => x.Operations).OfType <SelectionOperation>())
{
foreach (var collection in scope.Collections)
{
operation.RegisterCollection(scope, collection);
}
}
// Also update the current state
foreach (var collection in scope.Collections)
{
CurrentState.RegisterCollection(scope, collection);
}
return(scope);
}
/// <summary>
/// Registers a collection to the previous and next states of this operation.
/// </summary>
/// <param name="scope"></param>
/// <param name="collection">The collection to register.</param>
public void RegisterCollection([NotNull] SelectionScope scope, [NotNull] INotifyCollectionChanged collection)
{
previousState.RegisterCollection(scope, collection);
nextState.RegisterCollection(scope, collection);
}