From 73673bd7895356565d991e8d61e1e29ea53aa054 Mon Sep 17 00:00:00 2001
From: Luis Leiva <lleiva@sciling.com>
Date: Sun, 12 Nov 2017 20:03:52 +0100
Subject: [PATCH] Fixed multitouch events

---
 jquery.sketchable.js | 6 ++++--
 sketchable.js        | 6 ++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/jquery.sketchable.js b/jquery.sketchable.js
index b4beeb7..40146f8 100644
--- a/jquery.sketchable.js
+++ b/jquery.sketchable.js
@@ -408,8 +408,9 @@
    */
   function execTouchEvent(e, callback) {
     var elem = $(e.target), data = elem.data(namespace), options = data.options;
-    var touches = e.originalEvent.touches;
     if (options.multitouch) {
+      // Track all fingers.
+      var touches = e.originalEvent.changedTouches;
       for (var i = 0; i < touches.length; i++) {
         var touch = touches[i];
         // Add the type of event to the touch object.
@@ -417,7 +418,8 @@
         callback(touch);
       }
     } else {
-      var touch = touches[0];
+      // Track only the current finger.
+      var touch = e.originalEvent.touches[0];
       // Add the type of event to the touch object.
       touch.type = e.type;
       callback(touch);
diff --git a/sketchable.js b/sketchable.js
index 317fc39..02d42b6 100644
--- a/sketchable.js
+++ b/sketchable.js
@@ -411,8 +411,9 @@
    */
   function execTouchEvent(e, callback) {
     var elem = e.target, data = dataBind(elem)[namespace], options = data.options;
-    var touches = e.touches;
     if (options.multitouch) {
+      // Track all fingers.
+      var touches = e.changedTouches;
       for (var i = 0; i < touches.length; i++) {
         var touch = touches[i];
         // Add the type of event to the touch object.
@@ -420,7 +421,8 @@
         callback(touch);
       }
     } else {
-      var touch = touches[0];
+      // Track only the current finger.
+      var touch = e.touches[0];
       // Add the type of event to the touch object.
       touch.type = e.type;
       callback(touch);