part way through changing all serialization to use string concatenation prior to dropping Nokogiri dep in production.

1 files changed, 18 insertions, 2 deletions

diff --git a/lib/axlsx/drawing/val_axis_data.rb b/lib/axlsx/drawing/val_axis_data.rb
index 6b950443..b974b5d1 100644
--- a/lib/axlsx/drawing/val_axis_data.rb
+++ b/lib/axlsx/drawing/val_axis_data.rb
@@ -3,6 +3,22 @@ module Axlsx
   # The ValAxisData class manages the values for a chart value series.
   class ValAxisData < CatAxisData
 
+    def to_xml_string(str = '')
+      str << '<val>'
+      str << '<numRef>'
+      str << '<f>' << Axlsx::cell_range(@list) << '</f>'
+      str << '<numCache>'
+      str << '<formatCode>General</formatCode>'
+      str << '<ptCount val="' << size.to_s << '"/>'
+      each_with_index do |item, index|
+        v = item.is_a?(Cell) ?  item.value.to_s : item
+        str << '<pt idx="' << index.to_s << '"><v>' << v << '</v></pt>'
+      end
+      str << '</numCache>'
+      str << '</numRef>'
+      str << '</val>'
+    end
+
     # Serializes the value axis data
     # @param [Nokogiri::XML::Builder] xml The document builder instance this objects xml will be added to.
     # @return [String]
@@ -17,11 +33,11 @@ module Axlsx
               v = item.is_a?(Cell) ? item.value : item
               xml.pt(:idx=>index) { xml.v v }
             end
-          }                        
+          }
         }
       }
     end
 
   end
-  
+
 end