public static IObservable <float> ScaleToScreenHeight(
this IObservable <float> observable,
ScaleAdapter scaleAdapter
)
=> observable.CombineLatest(
scaleAdapter.WindowSize,
(value, windowSize) => value * windowSize.Y
);
public static IObservable <Vector2> ScaleToScreen(
this IObservable <Vector2> observable,
ScaleAdapter scaleAdapter
)
=> observable
.CombineLatest(
scaleAdapter.WindowSize,
(vector, windowSize) => new Vector2(
vector.X * windowSize.X,
vector.Y * windowSize.Y
)
);
public MarkerTrackingViewModel(ITrackingService markerTracking, ScaleAdapter scaleAdapter)
{
_scaleAdapter = scaleAdapter;
_disposables = new List <IDisposable>()
{
Observable.FromEvent <TrackerEvents>(
handler => markerTracking.OnEvents += handler,
handler => markerTracking.OnEvents -= handler
)
.SelectMany(events => events.markerEvents)
.ObserveOn(SynchronizationContext.Current)
.Subscribe(HandleMarkerEvent)
};
}
public MainViewModel()
{
ScaleAdapter = new ScaleAdapter();
MarkerRegistration = new MarkerRegistrationViewModel(
_modelRoot.RegistrationService,
_modelRoot.RegistrationField,
ScaleAdapter
);
MarkerTracking = new MarkerTrackingViewModel(_modelRoot.TrackingService, ScaleAdapter);
Pointers = new PointersViewModel(_modelRoot.TrackingService);
Dispatcher.CurrentDispatcher.ShutdownStarted += (sender, e) => Dispose();
_modelRoot.Start();
}
public MarkerRegistrationViewModel(
IMarkerRegistrationService registrationService,
IMarkerRegistrationField registrationField,
ScaleAdapter scaleAdapter
)
{
IdSelectionPanel = new IdSelectionViewModel(registrationService);
FieldPosition = Observable.Return(registrationField.FieldPosition)
.ScaleToScreen(scaleAdapter)
.ToReactiveProperty();
FieldSize = Observable.Return(registrationField.FieldSize)
.ScaleToScreen(scaleAdapter)
.ToReactiveProperty();
IsCandidatePlaced = Observable.FromEvent <MarkerCandidateState>(
h => registrationService.OnMarkerCandidateUpdated += h,
h => registrationService.OnMarkerCandidateUpdated -= h
)
.Do(value => Debug.WriteLine($"-> Candidate update = {value}"))
.Select(state => state == MarkerCandidateState.Detected)
.ToReactiveProperty();
IsSelectingId = IsCandidatePlaced
.SelectMany(async isSelecting =>
{
if (isSelecting)
{
await IdSelectionPanel.UpdateRegisteredIdsAsync();
return(IsCandidatePlaced.Value);
}
return(false);
})
.ToReactiveProperty();
_disposable = IdSelectionPanel.SelectedId
.Subscribe(id =>
{
registrationService.RegisterCandidate(id);
IsSelectingId.Value = false;
IsCandidatePlaced.ForceNotify();
});
}
public TrackedMarkerViewModel(int index, ScaleAdapter scaleAdapter)
{
Index = index;
Color = _colors[index % _colors.Length];
Position = new ReactiveProperty <Vector2>();
Radius = new ReactiveProperty <float>();
Rotation = new ReactiveProperty <float>();
ScaledPosition = Observable.CombineLatest(
Position,
scaleAdapter.WindowWidth,
scaleAdapter.WindowHeight,
(position, width, height) => new Vector2(position.X * width, position.Y * height)
)
.ToReactiveProperty();
ScaledRadius = Radius.ScaleToScreenHeight(scaleAdapter)
.ToReactiveProperty();
}
