/// <summary>
/// Initialize gaze tracking.
/// </summary>
/// <param name="gazeDevice"></param>
private async void TryEnableGazeTrackingAsync(GazeDevicePreview gazeDevice)
{
// If eye-tracking device is ready, declare event handlers and start tracking.
if (IsSupportedDevice(gazeDevice))
{
timerGaze.Interval = new TimeSpan(0, 0, 0, 0, 20);
timerGaze.Tick += TimerGaze_Tick;
SetGazeTargetLocation();
// This must be called from the UI thread.
gazeInputSource = GazeInputSourcePreview.GetForCurrentView();
gazeInputSource.GazeEntered += GazeEntered;
gazeInputSource.GazeMoved += GazeMoved;
gazeInputSource.GazeExited += GazeExited;
}
// Notify if device calibration required.
else if (gazeDevice.ConfigurationState ==
GazeDeviceConfigurationStatePreview.UserCalibrationNeeded ||
gazeDevice.ConfigurationState ==
GazeDeviceConfigurationStatePreview.ScreenSetupNeeded)
{
// Device isn't calibrated, so invoke the calibration handler.
System.Diagnostics.Debug.WriteLine(
"Your device needs to calibrate. Please wait for it to finish.");
await gazeDevice.RequestCalibrationAsync();
}
// Notify if device calibration underway.
else if (gazeDevice.ConfigurationState ==
GazeDeviceConfigurationStatePreview.Configuring)
{
// Device is currently undergoing calibration.
// A device update is sent when calibration complete.
System.Diagnostics.Debug.WriteLine(
"Your device is being configured. Please wait for it to finish");
}
// Device is not viable.
else if (gazeDevice.ConfigurationState == GazeDeviceConfigurationStatePreview.Unknown)
{
// Notify if device is in unknown state.
// Reconfigure/recalbirate the device.
System.Diagnostics.Debug.WriteLine(
"Your device is not ready. Please set up your device or reconfigure it.");
}
}
