public IObservable <double> WhenReadingTaken() { this.observable = this.observable ?? Observable.Create <double>(ob => { var handler = new EventHandler <LightSensorDataUpdatedEventArgs>((sender, args) => ob.OnNext(args.Level) ); var sensor = new LightSensor { Interval = 250 }; sensor.DataUpdated += handler; sensor.Start(); return(() => { sensor.Stop(); sensor.DataUpdated -= handler; sensor.Dispose(); }); }) .Publish() .RefCount(); return(this.observable); }
/// <summary> /// Stops sensor and unregisters the listener from a sensor /// </summary> /// <param name="listener">Event handler registered</param> public void Stop(EventHandler <SensorEventArgs> listener) { sensor.Stop(); sensor.DataUpdated -= handler; }