From 9f7bcd2b64095ced9efab4df44f5cdb285130e69 Mon Sep 17 00:00:00 2001
From: Jordan Hollinger <jordan.hollinger@gmail.com>
Date: Fri, 5 Oct 2012 01:24:14 -0400
Subject: [PATCH] Add Graphene.theme and Graphene.font, which allows the user
 to set default theme options

---
 lib/graphene/gruff.rb | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/lib/graphene/gruff.rb b/lib/graphene/gruff.rb
index e1f577c..06f1e17 100644
--- a/lib/graphene/gruff.rb
+++ b/lib/graphene/gruff.rb
@@ -1,4 +1,12 @@
 module Graphene
+  class << self
+    # The default Gruff font path
+    attr_accessor :font
+
+    # The default Gruff theme
+    attr_accessor :theme
+  end
+
   # Executes the given block if Gruff is available. Raises a GrapheneException if not.
   def self.gruff
     if defined? Gruff
@@ -8,6 +16,14 @@ def self.gruff
     end
   end
 
+  private
+
+  # Apply the default theme and font to the given Gruff chart
+  def self.theme!(chart)
+    chart.font = self.font if self.font
+    chart.theme = self.theme if self.theme
+  end
+
   # Extends calculators with one-dimensional graphs, like pie charts.
   module OneDGraphs
     # Returns a Gruff::Pie object with the stats set.
@@ -206,6 +222,7 @@ def spider_chart(path=nil, title=nil, &block)
 
     # Builds a chart
     def chart(chart, path=nil, title=nil, hack=false, &block)
+      Graphene.theme! chart
       chart.title = title unless title.nil?
       block.call(chart) if block
 
@@ -394,6 +411,7 @@ def accumulator_bar_graph(path=nil, title=nil, &block)
 
     # Builds a graph
     def graph(graph, path=nil, title=nil, &block)
+      Graphene.theme! graph
       graph.title = title unless title.nil?
 
       # Create an empty array for each group (e.g. {["Firefox"] => [], ["Safari"] => []}), even if it's empty.