+ # Center the window
+ desktop = app.desktop()
+ window_size = gui.size()
+ gui.move(
+ (desktop.width() - window_size.width()) / 2,
+ (desktop.height() - window_size.height()) / 2
+ )
+ gui.show()
+
+ # Allow ctrl-c to work
+ signal.signal(signal.SIGINT, signal.SIG_DFL)
+