From a3b9129be19afabb3fa6b2fb913b85aab43f4652 Mon Sep 17 00:00:00 2001
From: Scott González <scott.gonzalez@gmail.com>
Date: Sun, 19 Feb 2017 10:52:27 -0500
Subject: Spinner: Ignore `mousewheel` events when not focused

Fixes #15139
Closes gh-1794
---
 ui/widgets/spinner.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'ui/widgets')

diff --git a/ui/widgets/spinner.js b/ui/widgets/spinner.js
index c63f4526a..0bc1db230 100644
--- a/ui/widgets/spinner.js
+++ b/ui/widgets/spinner.js
@@ -140,9 +140,13 @@ $.widget( "ui.spinner", {
 			}
 		},
 		mousewheel: function( event, delta ) {
-			if ( !delta ) {
+			var activeElement = $.ui.safeActiveElement( this.document[ 0 ] );
+			var isActive = this.element[ 0 ] === activeElement;
+
+			if ( !isActive || !delta ) {
 				return;
 			}
+
 			if ( !this.spinning && !this._start( event ) ) {
 				return false;
 			}
-- 
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