# File temp/Graph/Bar.rb, line 216
      def gen_svg
        d = Document.new
        d << XMLDecl.new
        d << DocType.new( %{svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd"} )
        if style_sheet && style_sheet != ''
          d << ProcessingInstruction.new( "xml-stylesheet",
            %{href="#{style_sheet}" type="text/css"} )
        end
        root = d.add_element( "svg", {
          "width" => width,
          "height" => height,
          "viewBox" => "0 0 #{width} #{height}",
          "xmlns" => "http://www.w3.org/2000/svg",
          "xmlns:xlink" => "http://www.w3.org/1999/xlink"
        })
        root << Comment.new( " "+"\\"*66 )
        root << Comment.new( " Created with SVG::Graph " )
        root << Comment.new( " Sean Russell " )
        root << Comment.new( " Based on SVG::TT::Graph for Perl by"+
        " Leo Lapworth & Stephan Morgan " )
        root << Comment.new( " "+"/"*66 )

        if not(style_sheet && style_sheet != '')
          root << Comment.new(" include default stylesheet if none specified ")
          defs = root.add_element( "defs" )
          style = defs.add_element( "style", {"type"=>"text/css"} )
          style << CData.new( CSS )
        end

        root << Comment.new( "SVG Background" )
        root.add_element( "rect", {
          "width" => width,
          "height" => height,
          "x" => "0",
          "y" => "0",
          "class" => "svgBackground"
        })

        # Calculate graph area and boundries
        x = 0
        y = 0
        char_width = 9
        half_char_height = 2.5

        min_value = 9e20
        max_value = 0
        max_key_size = 0
        max_x_label_size = @config[:fields].max{ |a,b| 
          a.length <=> b.length
        }.length

        for data in @data
          dataset = data[:data]
          title = data[:title]

          dm = dataset.min
          min_value = dm < min_value ? dm : min_value
          dm = dataset.max
          max_value = dm > max_value ? dm : max_value
          max_key_size = title.length if title.length > max_key_size
        end

        h = height
        w = width
        h -= 20 if show_x_labels
        max_x_label_length = 0
        if rotate_x_labels
          max_x_label_length = max_x_label_size * char_width
          h -= max_x_label_length
        end

        stagger = 0
        if stagger_x_labels
          stagger = 17
          h -= stagger
        end

        h = h - 25 - stagger if show_x_title

        if show_y_labels
          h -= 10
          y += 10
        end

        if show_graph_title
          h -= 25
          y += 25
        end

        if show_graph_subtitle
          h -= 10
          y += 10
        end

        key_box_size = 12
        key_padding = 5

        if key && key_position == :right
          w = w - (max_key_size * (char_width - 1)) - (key_box_size * 3 )
        elsif key && key_position == :bottom
          if data.size > 4
            h -= (data.size + 1) * (key_box_size + key_padding)
          else
            h -= 4 * (key_box_size + key_padding)
          end
        end

        minvalue = min_value
        minvalue = min_scale_value if min_scale_value

        base_line = h + y

        temp = max_value - minvalue
        top_pad = temp == 0 ? 10 : temp / 20.0

        scale_range = (max_value + top_pad) - minvalue

        scale_division = scale_divisions || (scale_range / 10.0)

        if scale_integers
          scale_division = scale_division < 1 ? 1 : scale_division.round
        end

        dx = @config[:fields].size
        data_widths_x = w / dx
        dw = data_widths_x

        half_label_width = @config[:fields][0].length/2 * char_width

        space_b4_y_axis = 0
        if half_label_width > (dw / 2)
          space_b4_y_axis = half_label_width - (dw / 2)
          if key && key_position == :right
            w = w - space_b4_y_axis
          else
            w = w - (space_b4_y_axis * 2)
          end
          x = x + space_b4_y_axis
        end

        max_value_length = max_value.to_s.length

        max_value_length_px = max_value_length * char_width

        if show_y_labels && space_b4_y_axis < max_value_length_px
          if max_value_length < 2
            w = w - (max_value_length * (char_width * 2)) - char_width
            x = x + (max_value_length * (char_width * 2)) + char_width 
          else
            w = w - max_value_length_px + char_width
            x = x + max_value_length_px + char_width
          end
        end

        if show_y_title && space_b4_y_axis < max_value_length_px
          w = w - 25
          x = x + 25
        end

        # Background
        root.add_element( "rect", {
          "x" => x,
          "y" => y,
          "width" => w,
          "height" => h,
          "class" => "graphBackground"
        })

        # Axis
        root.add_element( "path", {
          "d" => "M #{x} #{y} v#{h}",
          "class" => "axis",
          "id" => "xAxis"
        })
        root.add_element( "path", {
          "d" => "M #{x} #{base_line} h#{w}",
          "class" => "axis",
          "id" => "yAxis"
        })

        dx = @config[:fields].size

        data_widths_x = w / dx

        dw = (data_widths_x*100).truncate / 100.0

        i = dw
        count = 0

        if bar_gap
          bargap = 10
          bargap = dw / 2 if dw < bargap
        else
          bargap = 0
        end

        stagger_count = 0
        if show_x_labels
          for field in @config[:fields]
            text = root.add_element( "text" )
            text.attributes["class"] = "xAxisLabels"
            text.text = field

            tx = x + (dw / 2) - (bargap / 2)
            ty = base_line + 15
            tt = x + ( dw / 2 ) - ( bargap / 2 ) - half_char_height

            if count == 0
              i -= dw
            else
              tx += i
              tt += i
              if stagger_count == 2
                stagger_count = 0
              else
                ty += stagger
                root.add_element( "path", {
                  "d" => "M#{tx} #{base_line}, v#{stagger}",
                  "class" => "staggerGuideLine"
                })
              end
            end

            text.attributes["x"] = tx
            text.attributes["y"] = ty
            if rotate_x_labels
              text.attributes["transform"] = "rotate( 90 #{tt} #{ty} )"
              text.attributes["style"] = "text-anchor: start"
            end
            
            i += dw
            count += 1
            stagger_count += 1
          end
        end

        dy = scale_range / scale_division
        y_marker_height = h.to_f / dy
        dy = y_marker_height.to_i
        count = 0
        y_value = min_scale_value
        if show_y_labels
          while (dy * count) < h
            root.add_element( "text", {
              "x" => x - 5,
              "y" => base_line - (dy * count),
              "class" => "yAxisLabels"
            }).text = y_value
            if count != 0
              root.add_element( "path", {
                "d" => "M#{x} #{base_line - (dy * count)} h#{w}",
                "class" => "guideLines"
              })
            end
            y_value = y_value + scale_division
            count += 1
          end
        end

        if show_x_title 
          y_xtitle = show_x_labels ? 35 : 15
          root.add_element( "text", {
            "x" => (w / 2) + x,
            "y" => h + y + y_xtitle + stagger + max_x_label_length,
            "class" => "xAxisTitle"
          }).text = x_title
        end     

        if show_y_title 
          text = root.add_element( "text", { "class" => "yAxisTitle" } )
          text.text = y_title
          if y_title_text_direction == :tb
            text.attributes["x"] = 12
            text.attributes["y"] = (h / 2) + y
            text.attributes["style"] = "writing-mode: tb;"
          else
            text.attributes["transform"]="translate(15, #{(h/2)+y}) rotate(270)"
          end
        end

        bar_width = dw - bargap
        divider = dy / scale_division

        xcount = 0

        subbar_width = bar_width
        subbar_width /= @data.length if stack == :side
        @config[:fields].each_index { |i|
          dcount = 1
          for dataset in @data
            # X1
            p1 = (dw * xcount) + x
            # Y1
            p2 = base_line
            # to Y2
            p3 = base_line - (dataset[:data][i] * divider)
            # to X2
            p4 = subbar_width
            case stack
            when :side
              p1 += (dcount-1) * subbar_width
            when :top
            else
            end
            root.add_element( "path", {
              "class" => "fill#{dcount}",
              "d" => "M#{p1} #{p2} V#{p3} h#{p4} V#{p2} Z"
            })
            if show_data_values
              root.add_element( "text", {
                "x" => p1 + ((dw-bargap)/2)-(stack==:side ? subbar_width/2 : 0),
                "y" => p3 - 6,
                "class" => "dataPointLabel"
              } ).text = dataset[:data][i].to_s
            end
            dcount += 1
          end
          xcount += 1
        }

        key_count = 1
        key_padding = 5
        if key && key_position == :right
          for dataset in @data
            yval = y + (key_box_size * key_count) + (key_count * key_padding)
            root.add_element( "rect", {
              "x" => x + w + 20,
              "y" => yval,
              "width" => key_box_size,
              "height" => key_box_size,
              "class" => "key#{key_count}"
            })
            root.add_element( "text", {
              "x" => x + w + 20 + key_box_size + key_padding,
              "y" => yval + key_box_size,
              "class" => "keyText"
            }).text = dataset[:title]
            key_count += 1
          end
        elsif key && key_position == :bottom
          y_key = base_line
          y_key += 25 if show_x_title
          if rotate_x_labels && show_x_labels
            y_key = y_key + max_x_label_length
          elsif show_x_labels && stagger < 1
            y_key = y_key + 20
          end

          y_key_start = y_key
          x_key = x
          for dataset in @data
            if key_count == 4 || key_count == 7 || key_count == 10
              x_key += 200
              y_key -= (key_box_size * 4) - 2
            end
            wh = key_box_size
            bs = y_key + (key_box_size * key_count) + 
            (key_count * key_padding) + stagger
            cl = "key#{key_count}"
            root.add_element( "rect", {
              "x" => x_key,
              "y" => bs,
              "width" => wh,
              "height" => wh,
              "class" => cl
            })
            root.add_element( "text", {
              "x" => x_key + key_box_size + key_padding,
              "y" => bs + key_box_size,
              "width" => wh,
              "height" => wh,
              "class" => cl
            }).text = dataset[:title]
            key_count += 1
          end
        end

        if show_graph_title
          root.add_element( "text", {
            "x" => width / 2,
            "y" => "15",
            "class" => "mainTitle"
          }).text = graph_title
        end

        if show_graph_subtitle
          y_subtitle = show_graph_title ? 30 : 15
          root.add_element("text", {
            "x" => width / 2,
            "y" => y_subtitle,
            "class" => "subTitle"
          }).text = graph_subtitle
        end

        return d
      end