/// <summary>
/// Dissociates group from parent collection.
/// </summary>
private void DetachParentCollection()
{
_parentCollectionChangedListener.Detach();
_parentCollection = null;
if (_aggregateResultsChangedListener != null)
_aggregateResultsChangedListener.Detach();
}
/// <summary>
/// Sets the parent collection instance.
/// </summary>
/// <param name="collection">The parent collection instance.</param>
public void SetParentCollection(GroupRecordKeyedCollection collection)
{
if (_parentCollection != null)
DetachParentCollection();
_parentCollection = collection;
_parentCollectionChangedListener =
new CollectionChangedListener(this, _parentCollection)
{
OnEventAction = OnParentCollectionChanged,
OnDetachAction = OnDetachParentCollectionChanged
};
_parentCollection.CollectionChanged += _parentCollectionChangedListener.OnEvent;
if (ParentGroup != null)
{
var parentGroupCode = GenerateGroupCode(ParentGroup);
GroupRecord parentRecord;
_parentCollection.TryGetValue(parentGroupCode, out parentRecord);
ParentRecord = parentRecord;
}
}
