More in depth tutorial

src/main/python/main.py

+from fbs_runtime.application_context import ApplicationContext
+from PySide2.QtWidgets import *
+from PySide2.QtNetwork import QTcpSocket
+
+import sys
+
+class MainWindow(QWidget):
+    def __init__(self):
+        super(MainWindow, self).__init__()
+        
+        # Add components
+        self.layout = QVBoxLayout(self)
+        self.chat = QTextEdit(self)
+        self.chat.setReadOnly(True)
+        self.lineEdit = QLineEdit(self)
+        self.sendButton = QPushButton(self)
+        self.sendButton.setText("Send")
+
+        # Connect to sendText
+        self.lineEdit.returnPressed.connect(self.sendText)
+        self.sendButton.clicked.connect(self.sendText)
+
+        # Conect TCP
+        self.socket = QTcpSocket(self)
+        self.socket.connectToHost("localhost", 33000)
+        self.socket.readyRead.connect(self.readText)
+        
+        # Set layout
+        self.layout.addWidget(self.chat)
+        self.layout.addWidget(self.lineEdit)
+        self.layout.addWidget(self.sendButton)
+        
+        # Set window settings
+        self.setWindowTitle("kszképzés chat")
+        self.setLayout(self.layout)
+        self.resize(350, 350)
+
+    # Read text over TCP
+    def readText(self):
+        data = self.socket.readAll()
+        self.chat.append(str(data, 'utf-8'))
+
+    # Write text text over TCP
+    def sendText(self):
+        self.socket.write(self.lineEdit.text().encode('utf-8'))
+        self.lineEdit.clear()
+
+    # Send quit when the window is closed
+    def closeEvent(self, event):
+        self.socket.write("{quit}".encode('utf-8'))
+
+class AppContext(ApplicationContext):           # 1. Subclass ApplicationContext
+    def run(self):                              # 2. Implement run()
+        window = MainWindow()
+        version = self.build_settings['version']
+        window.setWindowTitle("chat v" + version)
+        window.show()
+        return self.app.exec_()                 # 3. End run() with this line
+
+if __name__ == '__main__':
+    appctxt = AppContext()                      # 4. Instantiate the subclass
+    exit_code = appctxt.run()                   # 5. Invoke run()
+    sys.exit(exit_code)
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