dispose method

@override Future<bool> dispose()

Implementation

@override
Future<bool> dispose() async {
  try {
    _trackingTimer?.cancel();

    await _gazeController.close();
    await _eyeStateController.close();
    await _headPoseController.close();
    await _faceDetectionController.close();

    // Stop WebGazer
    if (_webGazerStarted && js.context.hasProperty('webgazer')) {
      try {
        js.context['webgazer'].callMethod('end');
      } catch (e) {
        js.context.callMethod('eval', ['webgazer.end()']);
      }
    }

    return true;
  } catch (e) {
    return false;
  }
}