Close all plot windows of a blocking show() on Ctrl+C

timhoffm · timhoffm · commit 0c603a62cfad · 2023-10-11T21:29:13.000+02:00
Addresses the Qt part of #23385. It appears that `qapp.quit()` does not automatically close the windows of the app. We therefore do it explicitly. A unit test for this would be quite complex. Test this by hand by Ctrl+C in an interactive shell.
diff --git a/lib/matplotlib/backends/qt_compat.py b/lib/matplotlib/backends/qt_compat.py
@@ -215,6 +215,8 @@ def _may_clear_sock(*args):
     def handle(*args):
         nonlocal handler_args
         handler_args = args
+        for window in qapp.allWindows():
+            window.close()
         qapp.quit()
 
     signal.signal(signal.SIGINT, handle)
