MARKUS

        }

        private void zoomAndPanControl_MouseDown(object sender, MouseButtonEventArgs e)

            var set_option = this.ParentOfType<MainWindow>().dzTopMenu.Parent.ChildrenOfType<RadNumericUpDown>().Where(item => item.IsKeyboardFocusWithin).FirstOrDefault();

            if (set_option != null && !string.IsNullOrEmpty(set_option.ContentText))

            {

                set_option.Value = double.Parse(set_option.ContentText);

                //set_option.Focusable = false;

            }

            ConvertInkControlToPolygon();