Merge pull request #21601 from meeseeksmachine/auto-backport-of-pr-21530-on-v3.5.x

tacaswell · web-flow · commit d536b8ed3e74 · 2021-11-11T15:01:30.000-05:00
Backport PR #21530 on branch v3.5.x (Fix interrupting GTK on plain Python)
diff --git a/lib/matplotlib/backends/_backend_gtk.py b/lib/matplotlib/backends/_backend_gtk.py
@@ -169,6 +169,13 @@ def mainloop():
 
         try:
             _application.run()  # Quits when all added windows close.
+        except KeyboardInterrupt:
+            # Ensure all windows can process their close event from
+            # _shutdown_application.
+            context = GLib.MainContext.default()
+            while context.pending():
+                context.iteration(True)
+            raise
         finally:
             # Running after quit is undefined, so create a new one next time.
             _application = None
