background.rb in openxml-docx-0.11.0.rc

- old
+ new

@@ -1,12 +1,13 @@
 module OpenXml
   module Docx
     module Elements
-      class Background < Container
+      class Background < OpenXml::Docx::Element
+        include HasChildren, HasProperties
 
         with_namespace :w do
           attribute :color, expects: :hex_color
-          attribute :theme_color, expects: :valid_theme_color, displays_as: :themeColor
+          attribute :theme_color, one_of: OpenXml::Docx::THEME_COLORS, displays_as: :themeColor
           attribute :theme_shade, expects: :hex_digit, displays_as: :themeShade
           attribute :theme_tint, expects: :hex_digit, displays_as: :themeTint
         end
 
       end