def add_separator(self): """ Add an horizontal line to layout. """ separator = QFrame() separator.setFrameShape(QFrame.HLine) separator.setFrameShadow(QFrame.Sunken) separator.setMinimumSize(self.width(), 2) # Add to layout self.main_layout.addWidget(separator, self.row, 0, 1, 5) # Increment vertically position for next widget self.row += 1