From c8d07b9578cc765c4364854562e7bc6fbf5c656a Mon Sep 17 00:00:00 2001
From: Andy Dufilie <andrew.dufilie@iweave.com>
Date: Thu, 18 Feb 2016 18:09:41 -0500
Subject: [PATCH] gh-1583 added config.interaction.brighten option to disable
 brightening of selected path elements

---
 src/config.js    |  1 +
 src/selection.js | 12 ++++++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/config.js b/src/config.js
index 6d54b23..aa6e57a 100644
--- a/src/config.js
+++ b/src/config.js
@@ -18,6 +18,7 @@ c3_chart_internal_fn.getDefaultConfig = function () {
         zoom_onzoomend: function () {},
         zoom_x_min: undefined,
         zoom_x_max: undefined,
+        interaction_brighten: true,
         interaction_enabled: true,
         onmouseover: function () {},
         onmouseout: function () {},
diff --git a/src/selection.js b/src/selection.js
index e538763..b71d286 100644
--- a/src/selection.js
+++ b/src/selection.js
@@ -30,14 +30,18 @@ c3_chart_internal_fn.togglePoint = function (selected, target, d, i) {
 c3_chart_internal_fn.selectPath = function (target, d) {
     var $$ = this;
     $$.config.data_onselected.call($$, d, target.node());
-    target.transition().duration(100)
-        .style("fill", function () { return $$.d3.rgb($$.color(d)).brighter(0.75); });
+    if ($$.config.interaction_brighten) {
+        target.transition().duration(100)
+            .style("fill", function () { return $$.d3.rgb($$.color(d)).brighter(0.75); });
+    }
 };
 c3_chart_internal_fn.unselectPath = function (target, d) {
     var $$ = this;
     $$.config.data_onunselected.call($$, d, target.node());
-    target.transition().duration(100)
-        .style("fill", function () { return $$.color(d); });
+    if ($$.config.interaction_brighten) {
+        target.transition().duration(100)
+            .style("fill", function () { return $$.color(d); });
+    }
 };
 c3_chart_internal_fn.togglePath = function (selected, target, d, i) {
     selected ? this.selectPath(target, d, i) : this.unselectPath(target, d, i);