MonoHotDraw.Tools.DragTool.UpdateUndoActivity C# (CSharp) Méthode

        protected void UpdateUndoActivity()
        {
            if (HasMoved){
                DragToolUndoActivity activity = UndoActivity as DragToolUndoActivity;
                activity.EndPoint = new PointD(LastX, LastY);
            }

            else {
                UndoActivity = null;
            }
        }