import threading
from sys import argv
from threading import Thread

from PySide6.QtCore import QMetaObject
from PySide6.QtCore import Qt
from PySide6.QtCore import Slot
from PySide6.QtWidgets import QApplication
from PySide6.QtWidgets import QLabel
from PySide6.QtWidgets import QMainWindow

class Window(QMainWindow):
  def __init__(self):
    super().__init__()
    print(f"__init__: {threading.current_thread().name}")
    self.__statusLabel = QLabel()
    self.statusBar().addWidget(self.__statusLabel)

  @Slot()
  def setText(self):
    print(f"setText: {threading.current_thread().name}")
    self.__statusLabel.setText("Status")

  def setStatus(self):
    print(f"setStatus: {threading.current_thread().name}")
    QMetaObject.invokeMethod(self, "setText", Qt.ConnectionType.BlockingQueuedConnection)


def asynch(window):
  print(f"asynch: {threading.current_thread().name}")
  window.setStatus()

app = QApplication(argv)
window = Window()
Thread(target=asynch, args=[window], daemon=True).start()
window.show()
app.exec()