Mastering GUI Programming with Python

Repeating timers

Sometimes in an application, we need to repeat an action at specified intervals, such as autosaving a document, polling a network socket, or nagging a user incessantly to give the application a 5-star review in the app store (well, maybe not that one).

QTimer can handle this too, as you can see from the following code block:

        interval_seconds = 10        self.timer = qtc.QTimer()        self.timer.setInterval(interval_seconds * 1000)        self.interval_dialog = AutoCloseDialog(            self, "It's time again",            f"It has been {interval_seconds} seconds "            "since this dialog was last shown.", 2000)        self.timer.timeout.connect(self.interval_dialog.show)        self.timer.start()

In this example, we're creating a QTimer object explicitly rather than using the static ...