draw_legend (SVG::Graph::Graph)

    # File temp/Graph/Graph.rb, line 710
          def draw_legend
            if key
              group = @root.add_element( "g" )

              key_count = 0
              for key_name in keys
                y_offset = (KEY_BOX_SIZE * key_count) + (key_count * 5)
                group.add_element( "rect", {
                  "x" => 0.to_s,
                  "y" => y_offset.to_s,
                  "width" => KEY_BOX_SIZE.to_s,
                  "height" => KEY_BOX_SIZE.to_s,
                  "class" => "key#{key_count+1}"
                })
                group.add_element( "text", {
                  "x" => (KEY_BOX_SIZE + 5).to_s,
                  "y" => (y_offset + KEY_BOX_SIZE).to_s,
                  "class" => "keyText"
                }).text = key_name.to_s
                key_count += 1
              end

              case key_position
              when :right
                x_offset = @graph_width + @border_left + 10
                y_offset = @border_top + 20
              when :bottom
                x_offset = @border_left + 20
                y_offset = @border_top + @graph_height + 5
                if show_x_labels
                              max_x_label_height_px = (not rotate_x_labels) ?
                                    x_label_font_size :
                                    get_x_labels.max{|a,b|
                                      a.to_s.length<=>b.to_s.length
                                    }.to_s.length * x_label_font_size * 0.6
                    x_label_font_size
                  y_offset += max_x_label_height_px
                  y_offset += max_x_label_height_px + 5 if stagger_x_labels
                end
                y_offset += x_title_font_size + 5 if show_x_title
              end
              group.attributes["transform"] = "translate(#{x_offset} #{y_offset})"
            end
          end