nature_net.user_controls.v_keyboard.virtual_numpad.get_key C# (CSharp) Method

        private KeyAssignment get_key(double x, double y, TouchDevice td)
        {
            y = y - margin_h - 5; if (y < 0) y = 0;
            int row = (int)(y / (button_height));// + margin_h));
            if (row > rows.Count() - 1) row = rows.Count() - 1;
            int sum = rows[row][0];
            int col = 0;
            while (x > sum)
            {
                col++;
                if (col == rows[row].Count())
                    col--;
                sum = sum + rows[row][col] + margin_w;
            }
            Rectangle r = new Rectangle();
            r.Stroke = new SolidColorBrush(Colors.Black);
            r.StrokeThickness = 4;
            r.Height = button_height; r.Width = rows[row][col];
            Canvas.SetLeft(r, sum - r.Width);
            Canvas.SetTop(r, row * (button_height + margin_h));
            this.keyboard_canvas.Children.Add(r);
            if (!this.rectangles.ContainsKey(td))
                this.rectangles.Add(td, r);
            else
            {
                this.keyboard_canvas.Children.Remove(this.rectangles[td]);
                this.rectangles.Remove(td);
            }
            return keys[row][col];
        }