def __init__(self, app): """ constructor """ super(DialogProcessingOptions, self).__init__() self.ui = Ui_procOptionsDialog() self.ui.setupUi(self) self.setFixedSize(self.size()) self.app = app # connect slot (ui event) self.ui.btn_ok.clicked.connect(self.accept) self.ui.btn_close.clicked.connect(self.reject)