public InteractiveCollectionViewModel(IObservable <IChangeSet <T> > observable,
IObservable <Predicate <T> > invisiblefilter,
IObservable <Predicate <T> > enabledfilter,
IScheduler scheduler, Func <T, IConvertible> getkey = null, string title = null)
{
observable.ObserveOn(scheduler)
.Transform(s =>
{
var so = new SHDObject <T>(s, invisiblefilter, enabledfilter, getkey?.Invoke(s));
this.ReactToChanges(so);
return((IContain <T>)so);
})
.Bind(out _items)
.DisposeMany()
.Subscribe(
_ =>
Console.WriteLine("generic view model changed"),
ex =>
{
(Errors as ISubject <Exception>).OnNext(ex);
Console.WriteLine("Error in generic view model");
});
Title = title;
}
//private ReadOnlyObservableCollection<SHDObject<T>> _items;
public InteractiveCollectionViewModel(IObservableCache <T, R> observable,
IObservable <Predicate <T> > visiblefilter,
IObservable <Predicate <T> > enabledfilter,
IScheduler scheduler, Func <T, IConvertible> getkey = null, string title = null)
{
disposable = observable.Connect()
.ObserveOn(scheduler)
.Transform(s =>
{
var so = new SHDObject <T>(s, visiblefilter, enabledfilter, getkey?.Invoke(s));
this.ReactToChanges(so);
return((IContain <T>)so);
})
.Bind(out _items)
.DisposeMany()
.Subscribe(
_ =>
{
foreach (var x in _.Select(a => new KeyValuePair <IContain <T>, ChangeReason>(a.Current, a.Reason)))
{
(Changes as Subject <KeyValuePair <IContain <T>, ChangeReason> >).OnNext(x);
}
},
ex =>
{
(Errors as ISubject <Exception>).OnNext(ex);
Console.WriteLine("Error in generic view model");
},
() => Console.WriteLine("observable completed"));
Title = title;
}
public InteractiveCollectionViewModel(IObservable <IChangeSet <T, R> > observable, IScheduler scheduler = null, IObservable <T> disable = null, Func <T, IConvertible> getkey = null, string title = null, bool isReadonly = false)
{
if (scheduler != null)
{
observable = observable.ObserveOn(scheduler);
}
disposable = observable
.Transform(s =>
{
var funcenable = disable?.Scan(new List <T>(), (a, b) => { a.Add(b); return(a); }).Select(_ => { Predicate <T> f = a => !_.Any(b => b.Equals(a)); return(f); });
var so = new SHDObject <T>(s, null, funcenable, getkey?.Invoke(s));
so.IsReadOnly = isReadonly;
this.ReactToChanges(so);
return((IContain <T>)so);
})
.Bind(out _items)
.DisposeMany()
.Subscribe(
_ =>
{
foreach (var x in _.Select(a => new KeyValuePair <IContain <T>, ChangeReason>(a.Current, a.Reason)))
{
(Changes as Subject <KeyValuePair <IContain <T>, ChangeReason> >).OnNext(x);
}
},
ex =>
{
(Errors as ISubject <Exception>).OnNext(ex);
Console.WriteLine("Error in generic view model");
},
() =>
Console.WriteLine("observable completed"));
Title = title;
}
public static void ReactToChanges <T>(this InteractiveCollectionBase <T> col, SHDObject <T> so)
{
//so.IsSelected
// .Throttle(TimeSpan.FromMilliseconds(250))
// .Subscribe(b =>
// {
// if (col.Items?.FirstOrDefault(sof =>((SHDObject<T>) sof).IsSelected.Value == true) != (null))
// ((System.Reactive.Subjects.ISubject<T>)col.Selected).OnNext(col.Items.FirstOrDefault(sof => ((SHDObject<T>)sof).IsSelected.Value == true).Object);
// });
so.WhenPropertyChanged(_ => _.IsSelected).Select(_ => _.Value).Buffer(TimeSpan.FromMilliseconds(250)).Where(_ => _.Count > 0).Where(_ => _.All(a => a == true))
//.Throttle(TimeSpan.FromMilliseconds(250))
.Subscribe(b =>
{
//if (col.Items?.FirstOrDefault(sof => ((SHDObject<T>)sof).IsSelected.Value == true) != (null))
//{
// ((System.Reactive.Subjects.ISubject<T>)col.Selected).OnNext(col.Items.FirstOrDefault(sof => ((SHDObject<T>)sof).IsSelected.Value == true).Object);
((System.Reactive.Subjects.ISubject <KeyValuePair <T, InteractionArgs> >)col.Interactions).OnNext(new KeyValuePair <T, InteractionArgs>(so.Object, new InteractionArgs {
Interaction = Interaction.Select, Value = b.Count
}));
});
so.WhenPropertyChanged(_ => _.IsExpanded).Select(_ => _.Value).Subscribe(_ =>
{
if (_ != null)
{
//((System.Reactive.Subjects.ISubject<T>)col.IsExpanded).OnNext(so == default(SHDObject<T>) ? default(T) : so.Object);
((System.Reactive.Subjects.ISubject <KeyValuePair <T, InteractionArgs> >)col.Interactions).OnNext(new KeyValuePair <T, InteractionArgs>(so.Object, new InteractionArgs {
Interaction = Interaction.Expand, Value = _
}));
((ISubject <KeyValuePair <IContain <T>, ChangeReason> >)col.Changes).OnNext(new KeyValuePair <IContain <T>, ChangeReason>(so, ChangeReason.Update));
}
});
//so.DoubleClickCommand.Subscribe(_ =>
//{
// ((System.Reactive.Subjects.ISubject<KeyValuePair<T, InteractionArgs>>)col.Interactions).OnNext(new KeyValuePair<T, InteractionArgs>(_, new InteractionArgs { Interaction = Interaction.Click, Value = 2 }));
// //((System.Reactive.Subjects.ISubject<T>)col.DoubleClicked).OnNext(so == default(SHDObject<T>) ? default(T) : so.Object);
//});
so.Deletions.Subscribe(_ =>
{
((System.Reactive.Subjects.ISubject <UserCommandArgs>)col.UserCommands).OnNext(new UserCommandArgs {
UserCommand = UserCommand.Delete, Parameter = so.Object
});
//((System.Reactive.Subjects.ISubject<T>)col.Deleted).OnNext(so == default(SHDObject<T>) ? default(T) : so.Object);
});
so.WhenPropertyChanged(_ => _.IsChecked).StartWith(new PropertyValue <SHDObject <T>, bool?>(so, so.IsChecked)).Subscribe(_ =>
{
if (_.Value != null)
{
((System.Reactive.Subjects.ISubject <KeyValuePair <T, InteractionArgs> >)col.Interactions).OnNext(new KeyValuePair <T, InteractionArgs>(so.Object, new InteractionArgs {
Interaction = Interaction.Check, Value = _.Value
}));
((ISubject <KeyValuePair <IContain <T>, ChangeReason> >)col.Changes).OnNext(new KeyValuePair <IContain <T>, ChangeReason>(so, ChangeReason.Update));
}
});
}
