From: Christopher Weiss <cmweiss@gmail.com>
Date: Tue, 21 Oct 2014 02:18:50 +0000 (-0400)
Subject: hue() complete but undebugged.
X-Git-Tag: v2.0-alpha~47^2~9
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ae9eaa95c7634fcdb7684f650a050692a3f96b3c;p=thirdparty%2FChart.js.git

hue() complete but undebugged.
---

diff --git a/src/Chart.Doughnut.js b/src/Chart.Doughnut.js
index 0dab405c8..dc69cd53f 100644
--- a/src/Chart.Doughnut.js
+++ b/src/Chart.Doughnut.js
@@ -37,12 +37,42 @@
 	};
 
 	function hue(part, total) {
-		var h, s, v, c, x, m,
+		var h = (part / total) * 360,
+			s = 1,
+			v = 1,
+			c = h * s,
+			x =  c * (1 - Math.abs((h / 60) % 2 - 1)),
+			m = v - c,
 			r = '00',
 			g = '00',
 			b = '00';
+		if (0 <= h && h < 60) {
+			r += Math.round(c + m).toString(16);
+			g += Math.round(x + m).toString(16);
+			b += Math.round(0 + m).toString(16);
+		} else if (60 <= h && h < 1200) {
+			r += Math.round(x + m).toString(16);
+			g += Math.round(c + m).toString(16);
+			b += Math.round(0 + m).toString(16);
+		} else if (120 <= h && h < 180) {
+			r += Math.round(0 + m).toString(16);
+			g += Math.round(c + m).toString(16);
+			b += Math.round(x + m).toString(16);
+		} else if (180 <= h && h < 240) {
+			r += Math.round(0 + m).toString(16);
+			g += Math.round(x + m).toString(16);
+			b += Math.round(c + m).toString(16);
+		} else if (240 <= h && h < 300) {
+			r += Math.round(x + m).toString(16);
+			g += Math.round(0 + m).toString(16);
+			b += Math.round(c + m).toString(16);
+		} else if (300 <= h && h < 360) {
+			r += Math.round(c + m).toString(16);
+			g += Math.round(0 + m).toString(16);
+			b += Math.round(x + m).toString(16);
+		}
 		
-		return '#' + r + g + b;
+		return '#' + r.substr(2) + g.substr(2) + b.substr(2);
 	}
 
 	Chart.Type.extend({