/// <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>
/// Registers a collection to this state, creating an empty snapshot for it.
/// </summary>
/// <param name="scope"></param>
/// <param name="collection">The collection to register.</param>
public void RegisterCollection([NotNull] SelectionScope scope, [NotNull] INotifyCollectionChanged collection)
{
if (scope == null)
{
throw new ArgumentNullException(nameof(scope));
}
if (collection == null)
{
throw new ArgumentNullException(nameof(collection));
}
if (!states.ContainsKey(collection))
{
states.Add(collection, new State(new HashSet <AbsoluteId>(), scope.GetObjectToSelect));
}
}
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);
}