nearly finished client GUI with listening support

client/gui.py

@@ -0,0 +1,76 @@
+import socket
+
+from PyQt5.QtCore import QThread, pyqtSignal
+from PyQt5.QtWidgets import QMainWindow, QDialog, QDialogButtonBox, QVBoxLayout
+
+from config import config
+from client.MainWindow import Ui_MainWindow
+
+IP = '127.0.0.1'
+PORT = 55555
+
+HEADER_LENGTH = int(config.get(IP, 'HeaderLength'))
+
+class ReceiveWorker(QThread):
+    messages = pyqtSignal(str)
+    error = pyqtSignal()
+
+    def __init__(self, client: socket.socket, nickname: str, parent=None):
+        QThread.__init__(self, parent)
+        self.client = client
+        self.nickname = nickname
+
+    def run(self):
+        while True:
+            try:
+                length = int(self.client.recv(HEADER_LENGTH).decode('ascii'))
+                message = self.client.recv(length)
+                if message == 'NICK':
+                    self.client.send(self.nickname.encode('ascii'))
+                else:
+                    self.messages.emit(message)
+            except:
+                self.error.emit()
+                self.client.close()
+                break
+
+
+class CustomDialog(QDialog):
+
+    def __init__(self, *args, **kwargs):
+        super(CustomDialog, self).__init__(*args, **kwargs)
+
+        self.setWindowTitle("HELLO!")
+
+        buttons = QDialogButtonBox.Ok | QDialogButtonBox.Cancel
+
+        self.buttonBox = QDialogButtonBox(buttons)
+        self.buttonBox.accepted.connect(self.accept)
+        self.buttonBox.rejected.connect(self.reject)
+
+        self.layout = QVBoxLayout()
+        self.layout.addWidget(self.buttonBox)
+        self.setLayout(self.layout)
+
+
+class MainWindow(QMainWindow, Ui_MainWindow):
+    def __init__(self, *args, **kwargs):
+        super(MainWindow, self).__init__(*args, **kwargs)
+        self.setupUi(self)
+
+        self.client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.client.connect((IP, PORT))
+
+        # nicknameDialog = CustomDialog(self)
+        # if nicknameDialog.exec_():
+        #     print('s')
+
+        self.nickname = 'Default'
+
+        self.receiveThread = ReceiveWorker(self.client, self.nickname)
+        self.receiveThread.messages.connect(self.addMessage)
+        self.receiveThread.start()
+        self.show()
+
+    def addMessage(self, message: str):
+        self.textBrowser.append(message)