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"""Define eye tracking data file context
This program is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>.
"""
__author__ = "Théo de la Hogue"
__credits__ = []
__copyright__ = "Copyright 2023, Ecole Nationale de l'Aviation Civile (ENAC)"
__license__ = "GPLv3"
import logging
import time
import threading
import random
from argaze import ArFeatures, DataFeatures, GazeFeatures
class GazePositionGenerator(ArFeatures.ArContext):
@DataFeatures.PipelineStepInit
def __init__(self, **kwargs):
# Init ArContext class
super().__init__()
# Init private attribute
self.__range = (0, 0)
self.__x = 0
self.__y = 0
@property
def range(self) -> tuple[int, int]:
"""Maximal ranges for X and Y axis"""
return self.__range
@range.setter
def range(self, range: tuple[int, int]):
self.__range = range
@DataFeatures.PipelineStepEnter
def __enter__(self):
logging.info('GazePositionGenerator context starts...')
# Start gaze position generator thread
self.__gaze_thread = threading.Thread(target=self.__generate_gaze_position)
self.__gaze_thread.start()
return self
def __generate_gaze_position(self):
"""Generate gaze position."""
start_time = time.time()
self.__x = int(self.range[0] / 2)
self.__y = int(self.range[1] / 2)
while not self._stop_event.is_set():
# Edit millisecond timestamp
timestamp = int((time.time() - start_time) * 1e3)
self.__x += random.randint(-10, 10)
self.__y += random.randint(-10, 10)
logging.debug('> timestamp=%i, x=%i, y=%i', timestamp, self.__x, self.__y)
# Process timestamped random gaze position
self._process_gaze_position(timestamp = timestamp, x = self.__x, y = self.__y)
# wait 10ms
time.sleep(0.01)
@DataFeatures.PipelineStepExit
def __exit__(self, exception_type, exception_value, exception_traceback):
logging.info('GazePositionGenerator context ends...')
# Stop gaze position generator thread
self._stop_event.set()
threading.Thread.join(self.__gaze_thread)
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