show window events for debugging

direct/src/showbase/ShowBase.py

@@ -1164,6 +1164,7 @@ class ShowBase(DirectObject.DirectObject):
     def __windowEvent(self, win):
         properties = win.getProperties()
         if win == self.win:
+            self.notify.info("Got window event: %s" % (repr(properties)))
             if not properties.getOpen():
                 # If the user closes the main window, we should exit.
                 self.notify.info("User closed main window.")