public void TestReactiveCollection()
{
var _nums = new ReactiveCollection <int>();
IReadOnlyReactiveCollection <int> nums = _nums;
nums.ObserveAdd().Subscribe(Add);
nums.ObserveAdd().Subscribe(Add);
_nums.Add(42);
Assert.AreEqual(0, _index);
Assert.AreEqual(42 * 2, _added);
}
/// <summary>
/// Iterates through the collection on subscription, and then pumps add and replace events.
/// </summary>
/// <param name="collection"></param>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public static IObservable <T> Observe <T>(this IReadOnlyReactiveCollection <T> collection)
{
return(Observable.Merge(
collection.ToObservable(),
collection.ObserveAdd().Select(e => e.Value),
collection.ObserveReplace().Select(e => e.NewValue)));
}
public WhereManyReactiveCollection(IReadOnlyReactiveCollection <T> source, Func <T, bool> filter, Func <T, IObservable <Unit> > filterChanged, IObservable <Unit> generalFilterChanged = null)
{
this.filter = filter;
this.filterChanged = filterChanged;
onAdd = source.ObserveAdd().Subscribe(@event =>
{
OnAdd(@event.Value);
});
onRemove = source.ObserveRemove().Subscribe(@event => { OnRemove(@event.Value); });
onReset = source.ObserveReset().Subscribe(_ => ClearItems());
onReset = source.ObserveReplace().Subscribe(@event =>
{
OnRemove(@event.OldValue);
OnAdd(@event.NewValue);
});
if (generalFilterChanged != null)
{
generalFilterChangedBinding = generalFilterChanged.Subscribe(_ =>
{
foreach (var element in source)
{
UpdateElement(element);
}
});
}
foreach (var el in source)
{
OnAdd(el);
}
}
public static IObservable <T> ToObservableAndAdded <T>(this IReadOnlyReactiveCollection <T> collection)
{
return(collection.ToObservable()
.Merge(collection
.ObserveAdd()
.Select(added => added.Value)));
}
/// <summary>
/// Connect this collection to another so that it reacts to additions and removals from the connected collection.
/// </summary>
/// <typeparam name="TTarget">The type of the connected collection.</typeparam>
/// <param name="self">The collection to connect to and watch.</param>
/// <param name="add">Called when an element is added to the connected collection.</param>
/// <param name="remove">Called when an element is removed from the connected collection.</param>
public static void ObserveChanges <TTarget>(
this IReadOnlyReactiveCollection <TTarget> self,
Action <CollectionAddEvent <TTarget> > add,
Action <CollectionRemoveEvent <TTarget> > remove)
{
self.ObserveAdd().Subscribe(add);
self.ObserveRemove().Subscribe(remove);
}
public static IObservable <Unit> AnyCollectionChangeAsObservable <T>(this IReadOnlyReactiveCollection <T> reactiveCollection)
{
return(Observable.Merge(
reactiveCollection.ObserveReset().AsUnitObservable(),
reactiveCollection.ObserveAdd().AsUnitObservable(),
reactiveCollection.ObserveMove().AsUnitObservable(),
reactiveCollection.ObserveRemove().AsUnitObservable(),
reactiveCollection.ObserveReplace().AsUnitObservable()));
}
public static IObservable <CollectionAddRemoveEvent <T> > ObserveCurrentAddRemove <T>(this IReadOnlyReactiveCollection <T> This) =>
This.Select((x, i) => new CollectionAddRemoveEvent <T>(i, x, true))
.ToObservable()
.Concat(This
.ObserveAdd()
.Select(x => new CollectionAddRemoveEvent <T>(x.Index, x.Value, true))
.Merge(This
.ObserveRemove()
.Select(x => new CollectionAddRemoveEvent <T>(x.Index, x.Value, false))));
/// <summary>
/// Iterates through the collection on subscription, and pumps add and replace events with the index and the new
/// document always in the new value field.
/// </summary>
/// <param name="collection"></param>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public static IObservable <CollectionReplaceEvent <T> > ObserveChanges <T>(
this IReadOnlyReactiveCollection <T> collection)
{
return(Observable.Merge(
Observable.Range(0, collection.Count)
.Select(i => new CollectionReplaceEvent <T>(i, default(T), collection[i])),
collection.ObserveAdd().Select(e => new CollectionReplaceEvent <T>(e.Index, default(T), e.Value)),
collection.ObserveReplace()
));
}
public SortedReactiveCollection(IReadOnlyReactiveCollection <T> source, System.Func <T, T, int> comparer, IObservable <Unit> observableToReact)
{
this.comparer = comparer;
source.ObserveAdd().Subscribe(@event => { AddSorted(@event.Value); });
source.ObserveRemove().Subscribe(@event => { Remove(@event.Value); });
foreach (var el in source)
{
AddSorted(el);
}
}
public CollectionBinder(IReadOnlyReactiveCollection <T> source, BaseListItem <T> prefab, Transform parent)
{
this.source = source;
this.prefab = prefab;
this.parent = parent;
prefab.gameObject.SetActive(false);
onAdd = source.ObserveAdd().Subscribe(@event => UpdateCollection());
onMove = source.ObserveMove().Subscribe(@event => UpdateCollection());
onReset = source.ObserveReset().Subscribe(@event => UpdateCollection());
onRemove = source.ObserveRemove().Subscribe(@event => UpdateCollection());
onReplace = source.ObserveReplace().Subscribe(@event => UpdateCollection());
UpdateCollection();
}
public WhereReactiveCollection(IReadOnlyReactiveCollection <T> source, Func <T, bool> filter, IObservable <Unit> filterChanged)
{
this.filter = filter;
onAdd = source.ObserveAdd().Subscribe(@event =>
{
if (filter(@event.Value))
{
Add(@event.Value);
}
});
onRemove = source.ObserveRemove().Subscribe(@event =>
{
Remove(@event.Value);
});
onReset = source.ObserveReset().Subscribe(_ => ClearItems());
onReset = source.ObserveReplace().Subscribe(@event =>
{
Remove(@event.OldValue);
if (filter(@event.NewValue))
{
Add(@event.NewValue);
}
});
filterChanged.Subscribe(_ =>
{
foreach (var element in source)
{
if (filter(element))
{
if (!Contains(element))
{
Add(element);
}
}
else
{
Remove(element);
}
}
});
}
public static IDisposable BindChildPrefabsTo <T>(this GameObject input, IReadOnlyReactiveCollection <T> list,
GameObject prefab, Func <GameObject, Transform, GameObject> instantiator,
Action <T, GameObject> onChildCreated = null, Action <T, GameObject> onChildRemoving = null)
{
var disposable = new CompositeDisposable();
void onElementAdded(CollectionAddEvent <T> data)
{
var newChild = instantiator(prefab, input.transform);
onChildCreated?.Invoke(data.Value, newChild);
}
void onElementUpdated(CollectionReplaceEvent <T> data)
{
var existingChild = input.transform.GetChild(data.Index);
onChildCreated?.Invoke(data.NewValue, existingChild.gameObject);
}
void onElementRemoved(CollectionRemoveEvent <T> data)
{
var existingChild = input.transform.GetChild(data.Index);
onChildRemoving?.Invoke(data.Value, existingChild.gameObject);
GameObject.Destroy(existingChild);
}
list.ObserveAdd().Subscribe(onElementAdded).AddTo(disposable);
list.ObserveReplace().Subscribe(onElementUpdated).AddTo(disposable);
list.ObserveRemove().Subscribe(onElementRemoved).AddTo(disposable);
input.transform.DeleteAllChildren();
foreach (var element in list)
{
var newChild = instantiator(prefab, input.transform);
onChildCreated?.Invoke(element, newChild);
}
return(disposable.AddTo(input));
}
public ReactiveCollectionView(IReadOnlyReactiveCollection <T> collection, IFactory <TView> factory, Action <TView, T> initializer)
: base(collection, factory, initializer)
{
collection.ObserveAdd().Subscribe(addEvent => Add(addEvent.Index, addEvent.Value)).AddTo(Disposable);
collection.ObserveRemove().Subscribe(removeEvent => Remove(removeEvent.Index)).AddTo(Disposable);
}
