From 2c7f0c00a72d46821e161dd77e8a7c138b6e24af Mon Sep 17 00:00:00 2001
From: lkc0987 <lkc0987@gmail.com>
Date: Mon, 31 Dec 2018 15:57:24 -0800
Subject: [PATCH] Only check monitor index if multi monitor is enabled.

---
 appIcons.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/appIcons.js b/appIcons.js
index 3630610..8b78c9a 100644
--- a/appIcons.js
+++ b/appIcons.js
@@ -519,7 +519,9 @@ var taskbarAppIcon = new Lang.Class({
     },
 
     _checkIfMonitorHasFocus: function() {
-        return global.display.focus_window && global.display.focus_window.get_monitor() === this.panelWrapper.monitor.index;
+        return global.display.focus_window
+            && (!this._dtpSettings.get_boolean('multi-monitors')    // only check same monitor index if multi window is enabled.
+                    || global.display.focus_window.get_monitor() === this.panelWrapper.monitor.index);
     },
 
     _setAppIconPadding: function() {