From 1fcd2d064dfef0dff9b07a40d0f5d30e662d1d86 Mon Sep 17 00:00:00 2001
From:  <jlsharps@mit.edu>
Date: Tue, 21 Aug 2007 13:56:23 -0400
Subject: [PATCH] Put in a pie graph for Plurality votes. ALso slimmed down
 victories_and_ties method in rubyvote/condorcet.rb considerably.

---
 app/controllers/graph_controller.rb | 17 +++++++++++++----
 app/views/quickvote/results.rhtml   |  3 ++-
 lib/rubyvote/condorcet.rb           | 17 ++++-------------
 3 files changed, 19 insertions(+), 18 deletions(-)

diff --git a/app/controllers/graph_controller.rb b/app/controllers/graph_controller.rb
index c72da85..69577c6 100644
--- a/app/controllers/graph_controller.rb
+++ b/app/controllers/graph_controller.rb
@@ -121,12 +121,21 @@ class GraphController < ApplicationController
   
   def plurality_pie
     @election = Election.find(params[:id])
+    @election.results unless @election.plurality_result || @election.approval_result
+    votes = @election.votes.size
+    data = Hash.new
+    names = @election.names_by_id
     
-    
-    
+    @election.plurality_result.points.each do |candidate, votes|
+      data[names[candidate]] = votes
+    end
+     
     pie = GruffGraff.new ( :graph_type => Gruff::Pie,
-                           :data =>   ,
-                           :title => "Percentage of First Plce Votes")
+                           :title => "Percentage of First Place Votes",
+                           :data => data)
+    send_data(*pie.output)
+                           
+  end
   
  private 
   def get_positions_info(election)
diff --git a/app/views/quickvote/results.rhtml b/app/views/quickvote/results.rhtml
index 874f725..3d5468c 100644
--- a/app/views/quickvote/results.rhtml
+++ b/app/views/quickvote/results.rhtml
@@ -181,4 +181,5 @@ by several other names.</p>
 <%=image_tag( graph_url( :action => 'votes_per_interval', :id => @election ))%>
 <br />
 <%= image_tag( graph_url( :action => 'borda_bar', :id => @election ) ) %><br />
-<%= image_tag( graph_url( :action => 'choices_positions', :id => @election ) ) %>
+<%= image_tag( graph_url( :action => 'choices_positions', :id => @election ) ) %><br />
+<%= image_tag(graph_url( :action => 'plurality_pie', :id => @election ) )%>
diff --git a/lib/rubyvote/condorcet.rb b/lib/rubyvote/condorcet.rb
index 0cc1696..0c6fd56 100644
--- a/lib/rubyvote/condorcet.rb
+++ b/lib/rubyvote/condorcet.rb
@@ -123,27 +123,18 @@ class CondorcetResult < ElectionResult
   end
   
   def victories_and_ties
-    victors = Array.new
-    victories_ties = Hash.new
+    victories_ties = {}
     candidates = @matrix.keys.sort
     
     candidates.each do |candidate|
       candidates.each do |challenger|
         next if candidate == challenger
         diff = @matrix[candidate][challenger] - @matrix[challenger][candidate]
-        if diff >= 0 
-          victors << [candidate, challenger, diff] 
+        victories_ties[candidate] = {} unless victories_ties.key?(candidate)
+        if diff >= 0
+          victories_ties[candidate][challenger] = diff
         end
       end
-    end  
-    
-    victors.each do |list|
-      if victories_ties.has_key?(list[0])
-        victories_ties[list[0]][list[1]] = list[2]       
-      else
-        victories_ties[list[0]] = Hash.new
-        victories_ties[list[0]][list[1]] = list[2]
-      end
     end
     
     return victories_ties    
-- 
2.30.2