INNER CODE UNIT · Python

instance

pairinteraction/pairinteraction · src/pairinteraction_gui/app.py:39

    def instance() -> Application:
        """Return the current instance of the application."""
        return QApplication.instance()  # type: ignore [return-value]

    def allow_ctrl_c(self) -> None:
        # Create a pipe to communicate between the signal handler and the Qt event loop
        pipe_r, pipe_w = os.pipe()

        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()

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