From 3eac183d8cb1d00d59dc4a7ebf6c472f8db23e86 Mon Sep 17 00:00:00 2001
From: Hal Blackburn <hwtb2@caret.cam.ac.uk>
Date: Tue, 26 Feb 2013 11:50:11 +0000
Subject: [PATCH] Fix handling of touchmove events on Android
Dragging the canvas did not work on Android devices as the === check for
lastTouch and the current event was always evaluating to false.
Presumably Safari on iOS re-uses the same Touch object for touchmove
events with the same finger, whereas Chrome/Firefox on Android creates
new Touch objects for each event (so the === evaluates false). The code
now compares Touch.identifier to ensure the new touch event is from the
same finger as the initiating touchstart.
---
src/mousetracker.js | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/mousetracker.js b/src/mousetracker.js
index 391d2f0b..9fd9ffbe 100644
--- a/src/mousetracker.js
+++ b/src/mousetracker.js
@@ -943,7 +943,7 @@
if( event.touches.length === 1 &&
event.targetTouches.length === 1 &&
event.changedTouches.length === 1 &&
- THIS[ tracker.hash ].lastTouch === event.touches[ 0 ]){
+ THIS[ tracker.hash ].lastTouch.identifier === event.touches[ 0 ].identifier){
onMouseMove( tracker, event.touches[ 0 ] );