3 files changed, 43 insertions, 1 deletions
diff --git a/lib/axlsx/workbook/workbook.rb b/lib/axlsx/workbook/workbook.rb
index ddb13600..4ba44adb 100644
--- a/lib/axlsx/workbook/workbook.rb
+++ b/lib/axlsx/workbook/workbook.rb
@@ -11,6 +11,7 @@ require 'axlsx/workbook/worksheet/cell_serializer.rb'
 require 'axlsx/workbook/worksheet/cell.rb'
 require 'axlsx/workbook/worksheet/page_margins.rb'
 require 'axlsx/workbook/worksheet/page_set_up_pr.rb'
+require 'axlsx/workbook/worksheet/outline_pr.rb'
 require 'axlsx/workbook/worksheet/page_setup.rb'
 require 'axlsx/workbook/worksheet/header_footer.rb'
 require 'axlsx/workbook/worksheet/print_options.rb'
diff --git a/lib/axlsx/workbook/worksheet/outline_pr.rb b/lib/axlsx/workbook/worksheet/outline_pr.rb
new file mode 100644
index 00000000..ae9ccf38
--- /dev/null
+++ b/lib/axlsx/workbook/worksheet/outline_pr.rb
@@ -0,0 +1,33 @@
+module Axlsx
+
+  # The OutlinePr class manages serialization of a worksheet's outlinePr element, which provides various
+  # options to control outlining.
+  class OutlinePr
+    include Axlsx::OptionsParser
+    include Axlsx::Accessors
+    include Axlsx::SerializedAttributes
+
+    serializable_attributes :summary_below,
+                            :summary_right,
+                            :apply_styles
+
+    # These attributes are all boolean so I'm doing a bit of a hand
+    # waving magic show to set up the attriubte accessors
+    boolean_attr_accessor :summary_below,
+                          :summary_right,
+                          :apply_styles
+
+    # Creates a new OutlinePr object
+    # @param [Worksheet] worksheet The worksheet that owns this OutlinePr object
+    def initialize(options = {})
+      parse_options options
+    end
+
+    # Serialize the object
+    # @param [String] str serialized output will be appended to this object if provided.
+    # @return [String]
+    def to_xml_string(str = '')
+      str << "<outlinePr #{serialized_attributes} />"
+    end
+  end
+end
diff --git a/lib/axlsx/workbook/worksheet/sheet_pr.rb b/lib/axlsx/workbook/worksheet/sheet_pr.rb
index a299bc0f..fc9f5eac 100644
--- a/lib/axlsx/workbook/worksheet/sheet_pr.rb
+++ b/lib/axlsx/workbook/worksheet/sheet_pr.rb
@@ -1,6 +1,6 @@
 module Axlsx
 
-  # The SheetPr class manages serialization fo a worksheet's sheetPr element.
+  # The SheetPr class manages serialization of a worksheet's sheetPr element.
   class SheetPr
     include Axlsx::OptionsParser
     include Axlsx::Accessors
@@ -33,6 +33,7 @@ module Axlsx
     def initialize(worksheet, options={})
       raise ArgumentError, "you must provide a worksheet" unless worksheet.is_a?(Worksheet)
       @worksheet = worksheet
+      @outline_pr = nil
       parse_options options
     end
 
@@ -51,6 +52,7 @@ module Axlsx
       update_properties
       str << "<sheetPr #{serialized_attributes}>"
       tab_color.to_xml_string(str, 'tabColor') if tab_color
+      outline_pr.to_xml_string(str) if @outline_pr
       page_setup_pr.to_xml_string(str)
       str << "</sheetPr>"
     end
@@ -60,6 +62,12 @@ module Axlsx
     def page_setup_pr
       @page_setup_pr ||= PageSetUpPr.new
     end
+    
+    # The OutlinePr for this sheet pr object
+    # @return [OutlinePr]
+    def outline_pr
+      @outline_pr ||= OutlinePr.new( @worksheet )
+    end
 
     # @see tab_color
     def tab_color=(v)