def _handleNativeEvent(self, *args, **kwargs):
"""
_handleEvent is used by devices that signal new events by using an event driven
callback approach.
One args is required, the device event to be handled, "event"
"""
loggedTime = int(Computer.currentUsec())
event = None
if len(args) > 0:
event = args[0]
# do any manipulation to the native event object here before putting it in the devices
# circular buffer. Remember to keep work done in the callback to a minimum. For example,
# the conversion to a native ioHub event is done in the _getIOHubEventObject(event,device_instance_code)
# method, so does not need to be done here.
#
# ......
#
if 1:
return 'EYETRACKER_ERROR', '_handleNativeEvent', 'Default _handleNativeEvent callback Logic being Used. This must be implemented on a per eye tracker basis.'
EyeTracker.lastCallbackTime = loggedTime
# append the native event to the deque as a tuple of (loggedTime, event)
# This can be unpacked in the _getIOHubEventObject and the current_time
# used as the logged_time field of the ioHub DeviceEvent object.
#
self.I_nativeEventBuffer.append((loggedTime, event))
def _handleNativeEvent(self, *args, **kwargs):
"""
_handleEvent is used by devices that signal new events by using an event driven
callback approach.
One args is required, the device event to be handled, "event"
"""
loggedTime = int(Computer.currentUsec())
event = None
if len(args) > 0:
event = args[0]
# do any manipulation to the native event object here before putting it in the devices
# circular buffer. Remember to keep work done in the callback to a minimum. For example,
# the conversion to a native ioHub event is done in the _getIOHubEventObject(event,device_instance_code)
# method, so does not need to be done here.
#
# ......
#
if 1:
return (
"EYETRACKER_ERROR",
"_handleNativeEvent",
"Default _handleNativeEvent callback Logic being Used. This must be implemented on a per eye tracker basis.",
)
EyeTracker.lastCallbackTime = loggedTime
# append the native event to the deque as a tuple of (loggedTime, event)
# This can be unpacked in the _getIOHubEventObject and the current_time
# used as the logged_time field of the ioHub DeviceEvent object.
#
self.I_nativeEventBuffer.append((loggedTime, event))
def _poll(self):
"""
For use in systems where a polling model is used to check for new events and samples.
If your eye tracker supports an event based call-back approach, use _handleEvent(...) instead
of _poll and remove the periodic timer from the ioHub_config.yaml file settings.
"""
loggedTime = int(Computer.currentUsec())
currentHostTime = self.trackerTime()
ioHub_time_offset = loggedTime - currentHostTime
if 1:
return 'EYETRACKER_ERROR', '_poll', 'Default Poll Logic being Used. This must be implemented on a per eye tracker basis.'
#get native events queued up
noMoreDeviceEvents = True
while 1:
# get each native device event (this will be eye tracker specific)
#
# ....
# determine the event type and map it to one of the ioHub eye tracker event types
# found in ioHub.devices.eyeTrackerInterface.eye_events.py
#
# ......
if noMoreDeviceEvents:
break
ioHubEvent = list()
# put the ioHub eye tracker event IN ORDERED LIST FORM in devices buffer for pickup by the ioHub.
self.I_nativeEventBuffer.append(ioHubEvent)
EyeTracker.lastPollTime = loggedTime
def _poll(self):
"""
For use in systems where a polling model is used to check for new events and samples.
If your eye tracker supports an event based call-back approach, use _handleEvent(...) instead
of _poll and remove the periodic timer from the ioHub_config.yaml file settings.
"""
loggedTime=int(Computer.currentUsec())
currentHostTime = self.trackerTime()
ioHub_time_offset= loggedTime-currentHostTime
if 1:
return 'EYETRACKER_ERROR','_poll','Default Poll Logic being Used. This must be implemented on a per eye tracker basis.'
#get native events queued up
noMoreDeviceEvents=True
while 1:
# get each native device event (this will be eye tracker specific)
#
# ....
# determine the event type and map it to one of the ioHub eye tracker event types
# found in ioHub.devices.eyeTrackerInterface.eye_events.py
#
# ......
if noMoreDeviceEvents:
break
ioHubEvent = list()
# put the ioHub eye tracker event IN ORDERED LIST FORM in devices buffer for pickup by the ioHub.
self.I_nativeEventBuffer.append(ioHubEvent)
EyeTracker.lastPollTime=loggedTime
