__init__.py 文件源码

def on_event(self, event, payload):
        # Early abort in case of out ot filament when start printing, as we
        # can't change with a cold nozzle
        if event is Events.PRINT_STARTED and self.no_filament():
            self._logger.info("Printing aborted: no filament detected!")
            self._printer.cancel_print()
        # Enable sensor
        if event in (
            Events.PRINT_STARTED,
            Events.PRINT_RESUMED
        ):
            self._logger.info("%s: Enabling filament sensor." % (event))
            if self.sensor_enabled():
                GPIO.remove_event_detect(self.pin)
                GPIO.add_event_detect(
                    self.pin, GPIO.BOTH,
                    callback=self.sensor_callback,
                    bouncetime=self.bounce
                )
        # Disable sensor
        elif event in (
            Events.PRINT_DONE,
            Events.PRINT_FAILED,
            Events.PRINT_CANCELLED,
            Events.ERROR
        ):
            self._logger.info("%s: Disabling filament sensor." % (event))
            GPIO.remove_event_detect(self.pin)