From 70f3000113e52d40d9b4910fd504a8517abb40a9 Mon Sep 17 00:00:00 2001
From: Romain Vigier <romain@romainvigier.fr>
Date: Wed, 13 Apr 2022 14:51:30 +0200
Subject: [PATCH] Background button: Keep default size if the monitor size is
 unavailable

---
 src/preferences/BackgroundButton.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/preferences/BackgroundButton.js b/src/preferences/BackgroundButton.js
index cc4e8f5..033dfdf 100644
--- a/src/preferences/BackgroundButton.js
+++ b/src/preferences/BackgroundButton.js
@@ -47,6 +47,8 @@ var BackgroundButton = GObject.registerClass({
     #setupSize() {
         const display = Gdk.Display.get_default();
         const monitor = display.get_monitors().get_item(0);
+        if (monitor.width_mm === 0 || monitor.height_mm === 0)
+            return;
         if (monitor.width_mm > monitor.height_mm)
             this.thumb_height *= monitor.height_mm / monitor.width_mm;
         else