From: Ben Dixon <bendxn@gmail.com>
Date: Thu, 15 Jan 2015 19:40:08 +0000 (-0600)
Subject: handling negative values in doughnut charts
X-Git-Tag: v1.0.2~11^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d051dfe47fe422ea9c40b73695e3ccdf9ba6c511;p=thirdparty%2FChart.js.git

handling negative values in doughnut charts
---

diff --git a/src/Chart.Doughnut.js b/src/Chart.Doughnut.js
index 35de93c7f..a892b0efc 100644
--- a/src/Chart.Doughnut.js
+++ b/src/Chart.Doughnut.js
@@ -109,12 +109,12 @@
 			}
 		},
 		calculateCircumference : function(value){
-			return (Math.PI*2)*(value / this.total);
+			return (Math.PI*2)*(Math.abs(value) / this.total);
 		},
 		calculateTotal : function(data){
 			this.total = 0;
 			helpers.each(data,function(segment){
-				this.total += segment.value;
+				this.total += Math.abs(segment.value);
 			},this);
 		},
 		update : function(){