def size_row(row) #:nodoc:
      # Look up the cell value to see if it has been changed
      if @row_sizes[row]
        height = @row_sizes[row]

        if height == 0
          pixels = 0
        else
          pixels = (4 / 3.0 * height).to_i
        end
      else
        pixels = (4 / 3.0 * @default_row_height).to_i
      end
      pixels
    end
def size_row(row) #:nodoc:
      # Look up the cell value to see if it has been changed
      if @row_sizes[row]
        height = @row_sizes[row]

        if height == 0
          pixels = 0
        else
          pixels = (4 / 3.0 * height).to_i
        end
      else
        pixels = (4 / 3.0 * @default_row_height).to_i
      end
      pixels
    end
Convert the height of a cell from user's units to pixels. If the height
 hasn't been set by the user we use the default value. If the row is hidden
 it has a value of zero.