From 3579bb46ab5a91e52bcc0eae87f9adda5fd98c4d Mon Sep 17 00:00:00 2001
From: Stephen Birarda <commit@birarda.com>
Date: Tue, 10 Mar 2015 17:04:30 -0700
Subject: [PATCH] handle touch update without a touch begin event

---
 examples/lookWithTouch.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/examples/lookWithTouch.js b/examples/lookWithTouch.js
index 68b29c305b..e9e7b0735a 100644
--- a/examples/lookWithTouch.js
+++ b/examples/lookWithTouch.js
@@ -38,6 +38,13 @@ function touchUpdateEvent(event) {
     if (wantDebugging) {
         print("touchUpdateEvent event.x,y=" + event.x + ", " + event.y);
     }
+    
+    if (!startedTouching) {
+      // handle Qt 5.4.x bug where we get touch update without a touch begin event
+      startedTouching = true;
+      lastX = event.x;
+      lastY = event.y;
+    }
 
     var MOUSE_YAW_SCALE = -0.25;
     var MOUSE_PITCH_SCALE = -12.5;