From a552f5aa2805fddcc75d72258549c6ee7787659e Mon Sep 17 00:00:00 2001
From: Robin Hu <robinfhu@gmail.com>
Date: Sat, 3 Aug 2013 23:05:06 -0400
Subject: [PATCH] Added ability to double-click pie chart series and have it be
 the only one selected.

---
 src/models/pieChart.js | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/models/pieChart.js b/src/models/pieChart.js
index 2cc1c5a..e0e0b0b 100644
--- a/src/models/pieChart.js
+++ b/src/models/pieChart.js
@@ -156,7 +156,7 @@ nv.models.pieChart = function() {
       // Event Handling/Dispatching (in chart's scope)
       //------------------------------------------------------------
 
-      legend.dispatch.on('legendClick', function(d,i, that) {
+      legend.dispatch.on('legendClick', function(d) {
         d.disabled = !d.disabled;
 
         if (!pie.values()(data[0]).filter(function(d) { return !d.disabled }).length) {
@@ -173,6 +173,19 @@ nv.models.pieChart = function() {
         chart.update();
       });
 
+      legend.dispatch.on('legendDblclick', function(d) {
+          //Double clicking should always enable current series, and disabled all others.
+          var pieData = pie.values()(data[0]);
+          pieData.forEach(function(d) {
+             d.disabled = true;
+          });
+          d.disabled = false;  
+
+          state.disabled = pieData.map(function(d) { return !!d.disabled });
+          dispatch.stateChange(state);
+          chart.update();
+      });
+
       pie.dispatch.on('elementMouseout.tooltip', function(e) {
         dispatch.tooltipHide(e);
       });