From: wuchangming <wuchangmingnice@163.com>
Date: Fri, 27 Nov 2015 03:16:54 +0000 (+0800)
Subject: Bug in handler event.type='touchend'
X-Git-Tag: 2.0.0-beta1~7^2~1^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F1703%2Fhead;p=thirdparty%2FChart.js.git

Bug in handler event.type='touchend'

In Chorme.
while event.type = "touchend” ,  event.touches is a empty TouchList,
event.touches.length === 0
---

diff --git a/src/core/core.helpers.js b/src/core/core.helpers.js
index d8c8ac4df..08fc3a419 100644
--- a/src/core/core.helpers.js
+++ b/src/core/core.helpers.js
@@ -333,7 +333,7 @@
 
 			var d01 = Math.sqrt(Math.pow(current.x - previous.x, 2) + Math.pow(current.y - previous.y, 2));
 			var d12 = Math.sqrt(Math.pow(next.x - current.x, 2) + Math.pow(next.y - current.y, 2));
-			
+
 			var s01 = d01 / (d01 + d12);
 			var s12 = d12 / (d01 + d12);
 
@@ -624,7 +624,7 @@
 				canvas = evt.currentTarget || evt.srcElement,
 				boundingRect = canvas.getBoundingClientRect();
 
-			if (e.touches) {
+			if (e.touches && e.touches.length > 0) {
 				mouseX = e.touches[0].clientX;
 				mouseY = e.touches[0].clientY;
 
@@ -634,7 +634,7 @@
 			}
 
 			// Scale mouse coordinates into canvas coordinates
-			// by following the pattern laid out by 'jerryj' in the comments of 
+			// by following the pattern laid out by 'jerryj' in the comments of
 			// http://www.html5canvastutorials.com/advanced/html5-canvas-mouse-coordinates/
 
 			// We divide by the current device pixel ratio, because the canvas is scaled up by that amount in each direction. However