From 50acb9127b2d2d0bfb55c2dca71f0cf47051b0ee Mon Sep 17 00:00:00 2001
From: Tim Hoffmann <2836374+timhoffm@users.noreply.github.com>
Date: Thu, 31 Aug 2023 00:24:36 +0200
Subject: [PATCH] Backport PR #26646: Use standard method for closing QApp when
 last window is closed.

---
 lib/matplotlib/backends/backend_qt.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/matplotlib/backends/backend_qt.py b/lib/matplotlib/backends/backend_qt.py
index 62d7a9358544..4b3783bc87ca 100644
--- a/lib/matplotlib/backends/backend_qt.py
+++ b/lib/matplotlib/backends/backend_qt.py
@@ -140,7 +140,7 @@ def _create_qApp():
             image = str(cbook._get_data_path('images/matplotlib.svg'))
             icon = QtGui.QIcon(image)
             app.setWindowIcon(icon)
-        app.lastWindowClosed.connect(app.quit)
+        app.setQuitOnLastWindowClosed(True)
         cbook._setup_new_guiapp()
         if qt_version == 5:
             app.setAttribute(QtCore.Qt.AA_UseHighDpiPixmaps)