public static void InsertItemInItemsControl(ItemsControl itemsControl, OutlinerNote itemToInsert, int insertionIndex)
{
OutlinerNote parent = itemsControl.DataContext as OutlinerNote;
if (parent == null)
{
parent = (itemToInsert as OutlinerNote).GetRoot();
}
OutlinerNote newNote = new OutlinerNote(parent);
newNote.Clone(itemToInsert);
Window ownerWindow = TreeListView.FindParentWindow(itemsControl);
if (ownerWindow == null)
{
throw new Exception("Window cannot be null");
}
DocumentHelpers.CopyNodesRecursively(newNote, itemToInsert);
parent.SubNotes.Insert(insertionIndex, newNote);
if (itemsControl is TreeListView)
{
((TreeListView)itemsControl).MakeActive(newNote, -1, false);
}
}