# File lib/gruff/mini/legend.rb, line 10
      def expand_canvas_for_vertical_legend
        return if @hide_mini_legend

        @legend_labels = @data.collect {|item| item[Gruff::Base::DATA_LABEL_INDEX] }

        legend_height = scale_fontsize(
                                       @data.length * calculate_line_height +
                                       @top_margin + @bottom_margin)

        @original_rows = @raw_rows
        @original_columns = @raw_columns

        case @legend_position
        when :right then
          @rows = [@rows, legend_height].max
          @columns += calculate_legend_width + @left_margin
        else
          @rows += @data.length * calculate_caps_height(scale_fontsize(@legend_font_size)) * 1.7
        end
        render_background
      end