Mastering GUI Programming with Python

Connecting signals

Back in our MainWindow constructor, we need to finish up our application by creating a UdpChatInterface object and connecting its signals:

        username = qtc.QDir.home().dirName()        self.interface = UdpChatInterface(username)        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))

Before creating the interface, we're determining the username by grabbing the name of the current user's home directory. This is a bit of a hack, but it works well enough for our purposes here.

Next, we create our interface object and connect the chat window submitted signal to its send_message() slot.

We then connect ...