adding in color scale for conditional formatting

1 files changed, 62 insertions, 0 deletions

diff --git a/lib/axlsx/workbook/worksheet/cfvo.rb b/lib/axlsx/workbook/worksheet/cfvo.rb
new file mode 100644
index 00000000..22cf95d9
--- /dev/null
+++ b/lib/axlsx/workbook/worksheet/cfvo.rb
@@ -0,0 +1,62 @@
+module Axlsx
+  # Conditional Format Value Object
+  # Describes the values of the interpolation points in a gradient scale. This object is used by ColorScale, DataBar and IconSet classes
+  #
+  # @note The recommended way to manage these rules is via Worksheet#add_conditional_formatting
+  # @see Worksheet#add_conditional_formatting
+  # @see ConditionalFormattingRule#initialize
+  #
+  class Cfvo
+
+    # Type (ST_CfvoType)
+    # The type of this conditional formatting value object. options are num, percent, max, min, formula and percentile
+    # @return [Symbol]
+    attr_reader :type
+
+
+    # Type (xsd:boolean)
+    # For icon sets, determines whether this threshold value uses the greater than or equal to operator. 0 indicates 'greater than' is used instead of 'greater than or equal to'.
+    # The default value is true
+    # @return [Boolean]
+    attr_reader :gte
+
+
+    # Type (ST_Xstring)
+    # The value of the conditional formatting object
+    # This library will accept any value so long as it supports to_s
+    attr_reader :val
+
+    # Creates a new Cfvo object
+    # @option options [Symbol] type The type of conditional formatting value object
+    # @option options [Boolean]  gte threshold value usage indicator
+    # @option options [String] val The value of the conditional formatting object
+    def initialize(options={})
+      @gte = true
+      options.each do |o|
+        self.send("#{o[0]}=", o[1]) if self.respond_to? "#{o[0]}="
+      end
+    end
+
+    # @see type
+    def type=(v); Axlsx::validate_conditional_formatting_value_object_type(v); @type = v end
+
+    # @see gte
+    def gte=(v); Axlsx::validate_boolean(v); @gte = v end
+
+    # @see val
+    def val=(v)
+      raise ArgumentError, "#{v.inspect} must respond to to_s" unless v.respond_to?(:to_s)
+      @val = v.to_s
+    end
+
+    # serialize the Csvo object
+    # @param [String] str
+    # @return [String]
+    def to_xml_string(str = '')
+      str << '<cfvo '
+      str << instance_values.map { |key, value| '' << key << '="' << value.to_s << '"' }.join(' ')
+      str << ' />'
+    end
+
+  end
+end