public Task ShowAsync()
{
return(AsyncHelper.InvokeAsync <EventHandler>(
Show,
h => _window.Closed += h,
h => _window.Closed -= h,
tcs => (s, e) => tcs.TrySetResult(true)));
}
private async Task CalibrateAsync(ICalibrator calibrator)
{
var execution = calibrator as IEyeTrackerCalibrationExecution;
var result = SessionStepResult.Failed;
using (var cancellation = new CancellationDisposable())
{
_cancellation = cancellation;
try
{
execution.CalibrationFinished += Execution_CalibrationFinished;
await AsyncHelper.InvokeAsync <CalibratorStateChangedEventHandler, bool>
(
() => { },
h => calibrator.StateChanged += h,
h => calibrator.StateChanged -= h,
tcs => (c, state) =>
{
switch (state)
{
case CalibratorState.Canceled:
tcs.TrySetResult(false);
break;
case CalibratorState.Completed:
tcs.TrySetResult(true);
break;
}
},
cancellation.Token
);
// create result with calibrations
result = new EyeTrackerCalibrationSessionStepResult(_calibrations);
}
catch (OperationCanceledException)
{
await calibrator.CancelAsync();
}
finally
{
//remove handler from execution
if (execution != null)
{
execution.CalibrationFinished -= Execution_CalibrationFinished;
}
}
Navigation.Clear();
_cancellation = null;
}
OnCompleted(result);
}
public static async Task WaitUntilLoadedAsync(this FrameworkElement element)
{
await AsyncHelper.InvokeAsync <RoutedEventHandler>
(
() => { },
handler => element.Loaded += handler,
handler => element.Loaded -= handler,
tcs => (o, args) => tcs.SetResult(true)
);
}
public Task ShowAsync()
{
var flyout = Flyout;
flyout.Position = (Position)Position;
return(AsyncHelper.InvokeAsync <RoutedEventHandler>(
Show,
h => flyout.ClosingFinished += h,
h => flyout.ClosingFinished -= h,
tcs => (s, e) => tcs.TrySetResult(true)));
}
private async Task TryStartCalibrationAsync(ICalibrate calibrate)
{
if (CanCalibrate == false)
{
using (var cancellation = new CancellationDisposable())
{
_cancellation = cancellation;
await AsyncHelper.InvokeAsync <EventHandler <bool>, bool>
(
() => { },
h => calibrate.CanCalibrateChanged += h,
h => calibrate.CanCalibrateChanged -= h,
tcs => (_, canCalibrate) =>
{
if (canCalibrate)
{
tcs.TrySetResult(canCalibrate);
}
},
cancellation.Token
);
OnPropertyChanged(nameof(CanCalibrate));
_cancellation = null;
}
}
if (CanCalibrate)
{
var calibrator = calibrate.GetCalibrator();
var calibratorViewModel = (CalibratorViewModel)_resolver.Create(calibrator);
ApplySettings(calibratorViewModel);
Navigation.NavigateToObject(calibratorViewModel);
await CalibrateAsync(calibrator);
}
else
{
Complete();
}
}
public static async Task RunAsync(this Storyboard storyboard, CancellationToken cancellationToken)
{
try
{
await AsyncHelper.InvokeAsync <EventHandler>(
() => storyboard.Begin(),
handler => storyboard.Completed += handler,
handler => storyboard.Completed -= handler,
tcs => (s, e) => tcs.TrySetResult(true),
cancellationToken);
}
catch (OperationCanceledException)
{
storyboard.Stop();
throw;
}
}
public async Task SendAsync(IdentityMessage message)
{
// Plug in your email service here to send an email.
string text = String.IsNullOrWhiteSpace(message.Body)
? message.Subject
: String.Format("Please click on this link to {0}: {1}", message.Subject.ToLower(), message.Body);
string html = String.IsNullOrWhiteSpace(message.Body)
? message.Subject
: String.Format("Please click on this link to {0}: <a href=\"{1}\">link</a><br/><br/>Or copy and open the following link in the browser:<br/>{1}", message.Subject.ToLower(), message.Body);
using (var client = new SmtpClient())
using (var mail = new MailMessage())
{
mail.To.Add(new MailAddress(message.Destination));
mail.Subject = "[UXR] " + message.Subject;
mail.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(text, null, MediaTypeNames.Text.Plain));
mail.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(html, null, MediaTypeNames.Text.Html));
await AsyncHelper.InvokeAsync <SendCompletedEventHandler>
(
() => client.SendAsync(mail, null),
h => client.SendCompleted += h,
h => client.SendCompleted -= h,
(tcs) => (s, e) =>
{
if (e.Cancelled)
{
tcs.TrySetCanceled();
}
else if (e.Error != null)
{
tcs.TrySetException(e.Error);
}
else
{
tcs.TrySetResult(true);
}
}
);
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
/// <remarks>See Tobii docs p. 20.</remarks>
private async Task RunCalibrationAsync()
{
bool cancelled = false;
bool failed = false;
var calibration = _calibration;
using (CancellationTokenSource cts = new CancellationTokenSource())
{
KeyEventHandler keyCancelEventHandler = CreateKeyCancelEventHandler(cts);
CancelEventHandler cancelEventHandler = CreateCancelEventHandler(cts);
try
{
if (_window != null)
{
_window.KeyDown += keyCancelEventHandler;
_window.Closing += cancelEventHandler;
}
VisualStateManager.GoToElementState((FrameworkElement)this.Content, nameof(IntroductionState), true);
await Task.Delay(3000, cts.Token);
VisualStateManager.GoToElementState((FrameworkElement)this.Content, nameof(CalibrationProcessState), true);
await Task.Delay(300, cts.Token);
var failedTask = AsyncHelper.InvokeAsync <EventHandler <Exception> >
(
() => { },
h => calibration.Failed += h,
h => calibration.Failed -= h,
tcs => (_, ex) => tcs.TrySetException(ex),
cts.Token
);
var completedTask = AsyncHelper.InvokeAsync <EventHandler <CalibrationExecutionReport> >
(
() => calibration.Start(),
h => calibration.Completed += h,
h => calibration.Completed -= h,
tcs => (_, __) => tcs.TrySetResult(true),
cts.Token
);
var finishedTask = await Task.WhenAny(failedTask, completedTask);
if (finishedTask.IsCanceled)
{
cancelled = true;
}
else if (finishedTask == failedTask)
{
failed = true;
// TODO 10/09/2016 add error
// show message based on the exception
}
// TODO 12/10/2016 Show loading if the evaluation takes too long.
// await calibration.FinishAsync();
}
catch (OperationCanceledException)
{
cancelled = true;
}
catch (Exception)
{
failed = true;
// Show unknown error
}
finally
{
if (_window != null)
{
_window.KeyDown -= keyCancelEventHandler;
_window.Closing -= cancelEventHandler;
}
}
}
if (cancelled)
{
calibration?.Cancel();
}
else if (failed)
{
VisualStateManager.GoToElementState((FrameworkElement)this.Content, nameof(ErrorState), true);
}
}