From af83e27ff073a846da6af42390005766b552c632 Mon Sep 17 00:00:00 2001
From: liabru <liabru@brm.io>
Date: Wed, 21 Jan 2015 00:10:10 +0000
Subject: [PATCH] added Mouse.create warning for omitted element

---
 src/core/Mouse.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/core/Mouse.js b/src/core/Mouse.js
index 40e1407..b8b8da6 100644
--- a/src/core/Mouse.js
+++ b/src/core/Mouse.js
@@ -16,6 +16,10 @@ var Mouse = {};
      */
     Mouse.create = function(element) {
         var mouse = {};
+
+        if (!element) {
+            Common.log('Mouse.create: element was undefined, defaulting to document.body', 'warn');
+        }
         
         mouse.element = element || document.body;
         mouse.absolute = { x: 0, y: 0 };
@@ -26,7 +30,7 @@ var Mouse = {};
         mouse.scale = { x: 1, y: 1 };
         mouse.wheelDelta = 0;
         mouse.button = -1;
-        mouse.pixelRatio = element.getAttribute('data-pixel-ratio') || 1;
+        mouse.pixelRatio = mouse.element.getAttribute('data-pixel-ratio') || 1;
 
         mouse.sourceEvents = {
             mousemove: null,