From b7a2e6cd9e9c15db8ac953416d15f2131aa76e4c Mon Sep 17 00:00:00 2001
From: Anthony Pessy <anthony.pessy@gmail.com>
Date: Wed, 23 Aug 2017 13:30:05 +0200
Subject: [PATCH] Focused radius now can accept a function (#1704)

It fixes #1571
---
 src/shape.line.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/shape.line.js b/src/shape.line.js
index 421d7f9..bdb03c7 100644
--- a/src/shape.line.js
+++ b/src/shape.line.js
@@ -372,7 +372,11 @@ c3_chart_internal_fn.pointR = function (d) {
 };
 c3_chart_internal_fn.pointExpandedR = function (d) {
     var $$ = this, config = $$.config;
-    return config.point_focus_expand_enabled ? (config.point_focus_expand_r ? config.point_focus_expand_r : $$.pointR(d) * 1.75) : $$.pointR(d);
+    if (config.point_focus_expand_enabled) {
+        return isFunction(config.point_focus_expand_r) ? config.point_focus_expand_r(d) : ((config.point_focus_expand_r) ? config.point_focus_expand_r : $$.pointR(d) * 1.75);
+    } else {
+        return $$.pointR(d);
+    }
 };
 c3_chart_internal_fn.pointSelectR = function (d) {
     var $$ = this, config = $$.config;