Mastering GUI Programming with Python

Connecting our backend and testing

Back in MainWindow.__init__(), we need to add the relevant code to create our interface and connect the signals:

        recipient, _ = qtw.QInputDialog.getText(            None, 'Recipient',            'Specify of the IP or hostname of the remote host.')        if not recipient:            sys.exit()        self.interface = TcpChatInterface(username, recipient)        self.cw.submitted.connect(self.interface.send_message)        self.interface.received.connect(self.cw.write_message)        self.interface.error.connect(            lambda x: qtw.QMessageBox.critical(None, 'Error', x))

Since we need a recipient, we'll ask the user using a QInputDialog. This dialog class allows you to easily query a user for a single value. In this case, we're asking for the IP address or hostname of the other ...