public MainWindowViewModel()
{
CalculateTheAnswer = new ReactiveAsyncCommand();
CalculateTheAnswer.RegisterAsyncTask(_ => AnswerCalculator())
.ToProperty(this, x => x.TheAnswer);
CalculateTheAnswer.ThrownExceptions
.SelectMany(ex => UserError.Throw(ex.Message))
.Subscribe(result =>
{
if (result == RecoveryOptionResult.RetryOperation)
{
_retryCalculate = true;
CalculateTheAnswer.Execute(null);
}
else
Application.Current.Shutdown();
});
}
public void ReactiveAsyncCommandInitialConditionDefaultBehavior()
{
(new TestScheduler()).With(sched => {
var canExecute = sched.CreateHotObservable(
sched.OnNextAt(0, false),
sched.OnNextAt(250, true)
);
var fixture = new ReactiveAsyncCommand(canExecute);
fixture.RegisterAsyncTask(_ => DummyTestFunction());
Assert.True(fixture.CanExecute(null));
sched.AdvanceToMs(10);
Assert.False(fixture.CanExecute(null));
sched.AdvanceToMs(255);
Assert.True(fixture.CanExecute(null));
});
}
public SettingsVM(
ISettingsService Settings,
ICleanupData Cleanup,
IConnectivityService Connectivity
) {
this.Cleanup = Cleanup;
this.Settings = Settings;
this.Connectivity = Connectivity;
this.WhenAny(x => x.Model, x => x.Value)
.Where(x => x != null)
.Select(m => m.UseGPS)
.Subscribe(x => UseGPS = x);
Reset = new ReactiveAsyncCommand(Connectivity.WifiAvailable());
Reset.RegisterAsyncTask(OnReset);
var setting_changed =
this.WhenAny(x => x.UseGPS, x => x.Model,
(gps, model) => (model.Value != null) ? model.Value.UseGPS != gps.Value : false);
Save = new ReactiveCommand(setting_changed);
Messenger.RegisterMessageSource(
Save
.Do(_ => saveModel())
.Select(_ => Page.Previous)
);
RefreshVocabulary = new ReactiveCommand(Connectivity.WifiAvailable());
RefreshVocabulary
.Subscribe(_ => {
Messenger.SendMessage(Page.SetupVocabulary);
});
ManageTaxa = new ReactiveCommand();
Messenger.RegisterMessageSource(
ManageTaxa
.Select(_ => Page.TaxonManagement)
);
UploadData = new ReactiveCommand();
Messenger.RegisterMessageSource(
UploadData
.Select(_ => Page.Upload)
);
DownloadData = new ReactiveCommand();
Messenger.RegisterMessageSource(
DownloadData
.Select(_ => Page.Download)
);
Info = new ReactiveCommand();
Messenger.RegisterMessageSource(
Info
.Select(_ => Page.Info)
);
ImportExport = new ReactiveCommand();
Messenger.RegisterMessageSource(
ImportExport
.Select(_ => Page.ImportExport)
);
Settings
.SettingsObservable()
.Subscribe(x => Model = x);
}
public EditViewModel()
{
LoadImage = new ReactiveAsyncCommand();
ShareImage = new ReactiveCommand();
this.WhenAny(x => x.ImagePath, x => x.Value)
.Where(x => !String.IsNullOrWhiteSpace(x) && File.Exists(x))
.InvokeCommand(LoadImage);
LoadImage.RegisterAsyncTask(x => BitmapLoader.Current.Load(File.OpenRead((string)x)))
.Do(_ => { if(LoadedImage != null) LoadedImage.Dispose(); })
.ToProperty(this, x => x.LoadedImage);
var huffRects = this.WhenAny(x => x.ScreenRect, x => x.DatImg, x => x.DensityFactor, x => x.OnBottom, x => x.OnRight,
(screen, img, density, bottom, right) => CalculateHuffmanRects(screen.Value, img.Value, density.Value, bottom.Value, right.Value));
huffRects.Select(x => x.Item1).ToProperty(this, x => x.HuffmanSrcRect);
huffRects.Select(x => x.Item2).ToProperty(this, x => x.HuffmanDestRect);
this.WhenAny(x => x.ScreenRect, x => x.LoadedImage, x => x.DensityFactor,
(frame, img, density) => calculateImageRect(frame.Value, img.Value, density.Value))
.ToProperty(this, x => x.ImageDestRect);
}
public WelcomeViewModel(MediaPicker picker)
{
TakeNewPhoto = new ReactiveAsyncCommand();
ChooseExistingPhoto = new ReactiveAsyncCommand();
StartEdit = new ReactiveCommand();
var defaultCamera = new StoreCameraMediaOptions() { DefaultCamera = CameraDevice.Rear, Directory = "LeeMe", Name = "turnt.jpg", };
Observable.Merge(
TakeNewPhoto.RegisterAsyncTask(_ => picker.TakePhotoAsync(defaultCamera)),
ChooseExistingPhoto.RegisterAsyncTask(_ => picker.PickPhotoAsync()))
.Select(x => x.Path)
.InvokeCommand(StartEdit);
// TODO: Write a proper UserError handler for this
TakeNewPhoto.ThrownExceptions.Subscribe(ex => Console.WriteLine(ex));
ChooseExistingPhoto.ThrownExceptions.Subscribe(ex => Console.WriteLine(ex));
}