public override void RevealItems(int[] itemIDs)
{
// Optimization: Only spend time on revealing item if it is part of the Hierarchy
HashSet <int> validItemIDs = new HashSet <int>();
foreach (var itemID in itemIDs)
{
if (IsValidHierarchyInstanceID(itemID))
{
validItemIDs.Add(itemID);
}
}
// Get existing expanded in hashset
HashSet <int> expandedSet = new HashSet <int>(expandedIDs);
int orgSize = expandedSet.Count;
IHierarchyProperty propertyIterator = CreateHierarchyProperty();
int[] ancestors = propertyIterator.FindAllAncestors(validItemIDs.ToArray());
// Add all parents above id
foreach (var itemID in ancestors)
{
expandedSet.Add(itemID);
}
if (orgSize != expandedSet.Count)
{
// Bulk set expanded ids (is sorted in SetExpandedIDs)
SetExpandedIDs(expandedSet.ToArray());
// Refresh immediately if any Item was expanded
if (m_NeedRefreshRows)
{
FetchData();
}
}
}
