Mastering GUI Programming with Python

Building a chat GUI

Let's begin by creating a basic GUI form that we can use for both versions of the chat application. Start with the application template from Chapter 4, Building Applications with QMainWindow, and add this class:

class ChatWindow(qtw.QWidget):    submitted = qtc.pyqtSignal(str)    def __init__(self):        super().__init__()        self.setLayout(qtw.QGridLayout())        self.message_view = qtw.QTextEdit(readOnly=True)        self.layout().addWidget(self.message_view, 1, 1, 1, 2)        self.message_entry = qtw.QLineEdit()        self.layout().addWidget(self.message_entry, 2, 1)        self.send_btn = qtw.QPushButton('Send', clicked=self.send)        self.layout().addWidget(self.send_btn, 2, 2)

The GUI is pretty simple, just a text edit to display the conversation, a line edit to ...