コード例 #1
0
 private ReadOnlyFilteredView(IEnumerable <T> source, Func <T, bool> filter, IScheduler scheduler, TimeSpan bufferTime, IReadOnlyList <IObservable <object> > triggers)
 {
     Ensure.NotNull(source, nameof(source));
     Ensure.NotNull(filter, nameof(filter));
     this.source     = source;
     this.Filter     = filter;
     this.BufferTime = bufferTime;
     this.SetSource(this.Filtered());
     this.refreshSubscription = FilteredRefresher.Create(this, source, bufferTime, triggers, scheduler, false)
                                .Subscribe(this.Refresh);
 }
コード例 #2
0
        /// <summary>
        ///
        /// </summary>
        /// <param name="source">The collection to wrap</param>
        /// <param name="filter"></param>
        /// <param name="bufferTime">The time to defer updates, useful if many triggers fire in short time. Then it will be only one Reset</param>
        /// <param name="scheduler">The scheduler used when throttling. The collection changed events are raised on this scheduler</param>
        /// <param name="triggers">Triggers when to re evaluate the filter</param>
        public FilteredView(
            IList <T> source,
            Func <T, bool> filter,
            TimeSpan bufferTime,
            IScheduler scheduler,
            params IObservable <object>[] triggers)
            : base(source, Filtered(source, filter))
        {
            if (filter == null)
            {
                filter = x => true;
            }

            this.scheduler  = scheduler;
            this.bufferTime = bufferTime;
            this.filter     = filter;
            if (triggers == null || triggers.Length == 0)
            {
                this.triggers = new ObservableCollection <IObservable <object> >();
            }
            else
            {
                this.triggers = new ObservableCollection <IObservable <object> >(triggers);
            }

            this.refreshSubscription.Disposable = FilteredRefresher.Create(this, source, bufferTime, triggers, scheduler, false)
                                                  .ObserveOn(scheduler ?? Scheduler.Immediate)
                                                  .Subscribe(this.Refresh);
            var observables = new IObservable <object>[]
            {
                this.Triggers.ObserveCollectionChanged(false),
                this.ObservePropertyChangedSlim(nameof(this.Filter), false),
                this.ObservePropertyChangedSlim(nameof(this.BufferTime), false)
            };

            observables.Merge()
            .ThrottleOrDefault(bufferTime, scheduler)
            .Subscribe(_ => this.refreshSubscription.Disposable = FilteredRefresher.Create(this, source, bufferTime, triggers, scheduler, true)
                                                                  .ObserveOn(scheduler ?? Scheduler.Immediate)
                                                                  .Subscribe(this.Refresh));
        }