INNER CODE UNIT · Python

signal_handler

pairinteraction/pairinteraction · src/pairinteraction_gui/app.py:47

        def signal_handler(signal: int, frame: FrameType | None) -> None:
            os.write(pipe_w, b"x")  # Write a single byte to the pipe

        signal.signal(signal.SIGINT, signal_handler)

        def handle_signal() -> None:
            os.read(pipe_r, 1)  # Read the byte from the pipe to clear it
            logger.info("Ctrl+C detected in terminal. Shutting down gracefully...")
            self.quit()

        sn = QSocketNotifier(pipe_r, QSocketNotifier.Type.Read, parent=self)
        sn.activated.connect(handle_signal)

        # Create a timer to ensure the event loop processes events regularly
        # This makes Ctrl+C work even when the application is idle
        timer = QTimer(self)
        timer.timeout.connect(lambda: None)  # Do nothing, just wake up the event loop
        timer.start(200)

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