setup_graph_measurements (Gruff::Base)

    # File lib/gruff/base.rb, line 546
        def setup_graph_measurements
          @marker_caps_height = @hide_line_markers ? 0 :
                                  calculate_caps_height(@marker_font_size)
          @title_caps_height = @hide_title ? 0 :
                                  calculate_caps_height(@title_font_size)
          @legend_caps_height = @hide_legend ? 0 :
                                  calculate_caps_height(@legend_font_size)

          if @hide_line_markers
            (@graph_left,
             @graph_right_margin,
             @graph_bottom_margin) = [@left_margin, @right_margin, @bottom_margin]
          else
            longest_left_label_width = 0
            if @has_left_labels
              longest_left_label_width =  calculate_width(@marker_font_size,
                                          labels.values.inject('') { |value, memo| (value.to_s.length > memo.to_s.length) ? value : memo }) * 1.25
            else
              longest_left_label_width = calculate_width(@marker_font_size,
                              label(@maximum_value.to_f))
            end

            # Shift graph if left line numbers are hidden
            line_number_width = @hide_line_numbers && !@has_left_labels ?
                                  0.0 :
                                  (longest_left_label_width + LABEL_MARGIN * 2)

            @graph_left = @left_margin +
                          line_number_width +
                          (@y_axis_label.nil? ? 0.0 : @marker_caps_height + LABEL_MARGIN * 2)
            # Make space for half the width of the rightmost column label.
            # Might be greater than the number of columns if between-style bar markers are used.
            last_label = @labels.keys.sort.last.to_i
            extra_room_for_long_label = (last_label >= (@column_count-1) && @center_labels_over_point) ?
              calculate_width(@marker_font_size, @labels[last_label])/2.0 :
              0
            @graph_right_margin =   @right_margin + extra_room_for_long_label

            @graph_bottom_margin =  @bottom_margin +
                                    @marker_caps_height + LABEL_MARGIN
          end

          @graph_right = @raw_columns - @graph_right_margin
          @graph_width = @raw_columns - @graph_left - @graph_right_margin

          # When @hide title, leave a TITLE_MARGIN space for aesthetics.
          # Same with @hide_legend
          @graph_top = @top_margin +
                        (@hide_title ? TITLE_MARGIN : @title_caps_height + TITLE_MARGIN * 2) +
                        (@hide_legend ? LEGEND_MARGIN : @legend_caps_height + LEGEND_MARGIN * 2)

          x_axis_label_height = @x_axis_label.nil? ? 0.0 :
                                  @marker_caps_height + LABEL_MARGIN
          @graph_bottom = @raw_rows - @graph_bottom_margin - x_axis_label_height
          @graph_height = @graph_bottom - @graph_top
        end