private void MoveUp() { var currentDisplayElement = CurrentDisplayElement; var index = DisplayElements.IndexOf(currentDisplayElement); DisplayElements.Move(index, index - 1); }
private bool CanMoveUp() { var currentDisplayElement = CurrentDisplayElement; return(currentDisplayElement != null && DisplayElements.IndexOf(currentDisplayElement) != 0); }
private bool CanMoveDown() { var currentDisplayElement = CurrentDisplayElement; return(currentDisplayElement != null && DisplayElements.IndexOf(currentDisplayElement) != DisplayElements.Count - 1); }