def unsubscribe_from(self, subscription_type, callback=None):
'''Unsubscribes from data for the eye tracker.
See @ref find_all_eyetrackers or EyeTracker.__init__ on how to create an EyeTracker object.
You can unsubscribe from @ref EYETRACKER_EXTERNAL_SIGNAL, @ref EYETRACKER_EYE_IMAGES, @ref EYETRACKER_GAZE_DATA,
@ref EYETRACKER_HMD_GAZE_DATA, @ref EYETRACKER_USER_POSITION_GUIDE,
@ref EYETRACKER_NOTIFICATION_CONNECTION_LOST, @ref EYETRACKER_NOTIFICATION_CONNECTION_RESTORED,
@ref EYETRACKER_NOTIFICATION_CALIBRATION_MODE_ENTERED, @ref EYETRACKER_NOTIFICATION_CALIBRATION_MODE_LEFT,
@ref EYETRACKER_NOTIFICATION_CALIBRATION_CHANGED, @ref EYETRACKER_NOTIFICATION_TRACK_BOX_CHANGED,
@ref EYETRACKER_NOTIFICATION_DISPLAY_AREA_CHANGED, @ref EYETRACKER_NOTIFICATION_GAZE_OUTPUT_FREQUENCY_CHANGED,
@ref EYETRACKER_NOTIFICATION_EYE_TRACKING_MODE_CHANGED,
@ref EYETRACKER_NOTIFICATION_DEVICE_FAULTS, @ref EYETRACKER_NOTIFICATION_DEVICE_WARNINGS,
@ref EYETRACKER_TIME_SYNCHRONIZATION_DATA or @ref EYETRACKER_STREAM_ERRORS.
<CodeExample>gaze_data.py</CodeExample>
Args:
subscription_type: Type of data to unsubscribe from.
callback: Callback sent to subscribe_to or None to unsubscribe all subscriptions of this type.
'''
global _available_notification_subscriptions
global _EYETRACKER_NOTIFICATIONS_BASE
# Special handling of notification subscribtions.
if subscription_type in _available_notification_subscriptions.keys():
with self.__notification_subscription_lock:
if subscription_type in self.__notification_subscriptions:
if callback in self.__notification_subscriptions[
subscription_type]:
del self.__notification_subscriptions[
subscription_type][callback]
if callback is None or len(
self.__notification_subscriptions[
subscription_type]) == 0:
del self.__notification_subscriptions[
subscription_type]
if len(self.__notification_subscriptions) == 0:
self.unsubscribe_from(_EYETRACKER_NOTIFICATIONS, None)
else:
if subscription_type not in _subscription_types:
_on_error_raise_exception(_invalid_parameter)
with self.__subscription_lock:
if subscription_type in self.__subscriptions:
if callback in self.__subscriptions[subscription_type]:
del self.__subscriptions[subscription_type][callback]
if callback is None or len(
self.__subscriptions[subscription_type]) == 0:
del self.__subscriptions[subscription_type]
interop.unsubscribe_from(
_subscription_types[subscription_type]
["type_index"], self, self.__core_eyetracker)
def __del__(self):
with self.__subscription_lock:
for subscription_type in self.__subscriptions.keys():
interop.unsubscribe_from(subscription_type, self,
self.__core_eyetracker)
def _logging_unsubscribe():
interop.unsubscribe_from(0, None, 0)