from PySide2.QtGui import QWindow from PySide2.QtWidgets import QHBoxLayout, QLabel, QWidget class QBriefingWindow(QWindow): def __init__(self, parent): super(QBriefingWindow, self).__init__(parent) self.initUi() def initUi(self): layout = QHBoxLayout() layout.addWidget(QLabel("TODO : This will be the briefing window")) central_widget = QWidget() central_widget.setLayout(layout) self.setCentralWidget(central_widget)