private void DeleteItem(UndertaleObject obj)
{
TreeViewItem container = GetNearestParent <TreeViewItem>(GetTreeViewItemFor(obj));
object source = container.ItemsSource;
IList list = ((source as ICollectionView)?.SourceCollection as IList) ?? (source as IList);
bool isLast = list.IndexOf(obj) == list.Count - 1;
if (MessageBox.Show("Delete " + obj.ToString() + "?" + (!isLast ? "\n\nNote that the code often references objects by ID, so this operation is likely to break stuff because other items will shift up!" : ""), "Confirmation", MessageBoxButton.YesNo, isLast ? MessageBoxImage.Question : MessageBoxImage.Warning) == MessageBoxResult.Yes)
{
list.Remove(obj);
while (SelectionHistory.Remove(obj))
{
;
}
if (Selected == obj)
{
ChangeSelection(null);
}
if (Highlighted == obj)
{
Highlighted = null;
}
}
}
