/// <summary>
/// Unregisters a collection scope selected objects from the <see cref="SelectionService"/>.
/// </summary>
/// <param name="scope">The selection scope to unregister.</param>
public void UnregisterSelectionScope([NotNull] SelectionScope scope)
{
if (scope == null)
{
throw new ArgumentNullException(nameof(scope));
}
foreach (var collection in scope.Collections)
{
collection.CollectionChanged -= CollectionChanged;
}
scopes.Remove(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.UnregisterCollection(collection);
}
}
// Also update the current state
foreach (var collection in scope.Collections)
{
CurrentState.UnregisterCollection(collection);
}
}
/// <summary>
/// Unregisters a collection from the previous and next states of this operation.
/// </summary>
/// <param name="collection">The collection to unregister.</param>
public void UnregisterCollection([NotNull] INotifyCollectionChanged collection)
{
previousState.UnregisterCollection(collection);
nextState.UnregisterCollection(collection);
}