public Task<string> Solve(Captcha captcha)
{
Action dispose = null, initialize = null;
EventHandler timerHandler = null;
KeyEventHandler keyHandler = null;
RoutedEventHandler playHandler = null;
RoutedEventHandler solveHandler = null;
RoutedEventHandler reloadHandler = null;
RoutedEventHandler cancelHandler = null;
RoutedEventHandler toAudioHandler = null;
RoutedEventHandler toTextHandler = null;
TaskCompletionSource<string> completion = new TaskCompletionSource<string>();
DispatcherTimer timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(1) };
initialize = () =>
{
this.panel.Visibility = Visibility.Visible;
this.Refresh(captcha);
this.ApplyButtons(captcha);
this.play.Click += playHandler;
this.solve.Click += solveHandler;
this.solve.IsEnabled = false;
this.reload.Click += reloadHandler;
this.reload.IsEnabled = true;
this.cancel.Click += cancelHandler;
this.cancel.IsEnabled = true;
this.toAudio.Click += toAudioHandler;
this.toText.Click += toTextHandler;
this.text.KeyDown += keyHandler;
timer.Tick += timerHandler;
timer.Start();
};
dispose = () =>
{
this.panel.Visibility = Visibility.Collapsed;
timer.Tick -= timerHandler;
timer.Stop();
this.play.Click -= playHandler;
this.solve.Click -= solveHandler;
this.reload.Click -= reloadHandler;
this.cancel.Click -= cancelHandler;
this.toAudio.Click -= toAudioHandler;
this.toText.Click -= toTextHandler;
this.text.KeyDown -= keyHandler;
this.image.Source = null;
this.text.Clear();
};
playHandler = async (sender, args) =>
{
this.Lock();
try
{
await captcha.Play();
}
finally
{
this.Unlock();
}
};
solveHandler = (sender, args) =>
{
completion.SetResult(this.text.Text.Trim());
dispose.Invoke();
};
keyHandler = (sender, args) =>
{
if (this.solve.IsEnabled == true && args.Key == Key.Enter)
{
completion.SetResult(this.text.Text.Trim());
dispose.Invoke();
}
};
reloadHandler = async (sender, args) =>
{
this.Lock();
try
{
await captcha.Reload.Invoke();
this.Refresh(captcha);
}
finally
{
this.Unlock();
}
};
toAudioHandler = async (sender, args) =>
{
this.Lock();
try
{
await captcha.ToAudio.Invoke();
this.Refresh(captcha);
this.ApplyButtons(captcha);
}
finally
{
this.Unlock();
}
};
toTextHandler = async (sender, args) =>
{
this.Lock();
try
{
await captcha.ToImage.Invoke();
this.Refresh(captcha);
this.ApplyButtons(captcha);
}
finally
{
this.Unlock();
}
};
cancelHandler = (sender, args) =>
{
dispose.Invoke();
completion.SetResult(null);
};
timerHandler = (sender, args) =>
{
if (captcha.Cancellation.IsCancellationRequested == true)
{
dispose.Invoke();
completion.TrySetCanceled(captcha.Cancellation);
}
};
initialize.Invoke();
return completion.Task;
}
