Rx Throttle Event

Rx Throttle

		//reactive extensions for scroll view
		IEventPatternSource<EventArgs> ScrollReactSource;

		/// <summary>
		/// Occurs when react on decelerate.  Contrived method to make working with the even easier
		/// </summary>
		public event EventHandler<EventArgs> ReactOnDecelerate 
		{
			add { ScrollReactSource.OnNext += value; }
			remove { ScrollReactSource.OnNext -= value; }
		}
		public void Setup()
		{
			scrollView = new PagedScrollView(){Frame = frameLocal }; //iOS scroll View that emits event "Scrolled"
			//throttle the event, only react after user has stopped scrolling for 500 ms
			ScrollReactSource = Observable.Throttle (Observable.FromEventPattern<EventArgs> (scrollView, "Scrolled"), new TimeSpan (0, 0, 0, 0, 500)).ToEventPattern();
			ReactOnDecelerate += HandleReactOnDecelerate;
		}

		void HandleReactOnDecelerate (object sender, EventArgs e)
		{
			InvokeOnMainThread (() =>                
				{               
					//do work here
				});
		}