public MainViewModel(MainState state, ICloudFactory factory, CloudViewModelFactory createViewModel)
{
_factory = factory;
Refresh = ReactiveCommand.Create(state.Clouds.Refresh);
_isLoading = Refresh
.IsExecuting
.ToProperty(this, x => x.IsLoading);
_isReady = Refresh
.IsExecuting
.Select(executing => !executing)
.ToProperty(this, x => x.IsReady);
state
.Clouds
.Connect()
.Transform(ps => createViewModel(ps, factory.CreateCloud(ps.Parameters)))
.Sort(SortExpressionComparer <ICloudViewModel> .Descending(x => x.Created))
.ObserveOn(RxApp.MainThreadScheduler)
.Bind(out _providers)
.Subscribe();
var canRemove = this
.WhenAnyValue(x => x.SelectedProvider)
.Select(provider => provider != null);
Remove = ReactiveCommand.Create(
() => state.Clouds.RemoveKey(SelectedProvider.Id),
canRemove);
var canAddProvider = this
.WhenAnyValue(x => x.SelectedSupportedType)
.Select(type => Enum.IsDefined(typeof(CloudType), type));
Add = ReactiveCommand.Create(
() => state.Clouds.AddOrUpdate(new CloudState {
Type = SelectedSupportedType
}),
canAddProvider);
_welcomeScreenVisible = this
.WhenAnyValue(x => x.SelectedProvider)
.Select(provider => provider == null)
.ToProperty(this, x => x.WelcomeScreenVisible);
_welcomeScreenCollapsed = this
.WhenAnyValue(x => x.WelcomeScreenVisible)
.Select(visible => !visible)
.ToProperty(this, x => x.WelcomeScreenCollapsed);
var canUnselect = this
.WhenAnyValue(x => x.SelectedProvider)
.Select(provider => provider != null);
Unselect = ReactiveCommand.Create(() => Unit.Default, canUnselect);
Unselect.Subscribe(unit => SelectedProvider = null);
var outputCollectionChanges = Clouds
.ToObservableChangeSet(x => x.Id)
.Publish()
.RefCount();
outputCollectionChanges
.Filter(provider => provider.Id == state.SelectedProviderId)
.ObserveOn(RxApp.MainThreadScheduler)
.OnItemAdded(provider => SelectedProvider = provider)
.Subscribe();
outputCollectionChanges
.OnItemRemoved(provider => SelectedProvider = null)
.Subscribe();
this.WhenAnyValue(x => x.SelectedProvider)
.Skip(1)
.Select(provider => provider?.Id ?? Guid.Empty)
.Subscribe(id => state.SelectedProviderId = id);
SelectedSupportedType = state.SelectedSupportedType ?? SupportedTypes.First();
this.WhenAnyValue(x => x.SelectedSupportedType)
.Subscribe(type => state.SelectedSupportedType = type);
}
