void AddInSubtree(StandardCollectionViewGroup group, object item, CultureInfo culture, IList <GroupDescription> descriptions, bool allowSorting)
{
int depth = group.Depth;
if (group.IsBottomLevel)
{
group.AddItem(item, allowSorting, WrappedList);
CollectionChanged.Raise(this, new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, item, IndexOfSubtree(item)));
}
else
{
var desc = descriptions [group.Depth];
var groupNames = desc.GroupNameFromItem(item, group.Depth, culture);
if (groupNames is IList)
{
foreach (var name in (IList)groupNames)
{
AddInSubtree(group, item, culture, descriptions, allowSorting, name);
}
}
else
{
AddInSubtree(group, item, culture, descriptions, allowSorting, groupNames);
}
}
}
void AddInSubtree(StandardCollectionViewGroup group, object item, CultureInfo culture, IList <GroupDescription> descriptions, bool allowSorting, object name)
{
bool added = false;
foreach (StandardCollectionViewGroup g in group.Items)
{
var desc = descriptions [group.Depth];
if (desc.NamesMatch(g.Name, name))
{
AddInSubtree(g, item, culture, descriptions, allowSorting);
added = true;
}
}
if (!added)
{
int depth = group.Depth + 1;
var g = new StandardCollectionViewGroup(group, name, depth, depth == descriptions.Count, group.Sorters);
group.AddItem(g, allowSorting, WrappedList);
AddInSubtree(g, item, culture, descriptions, allowSorting);
}
}