void Start()
{
// Down stream
var buttonDownObservable = button.OnPointerDownAsObservable().Select(x => ButtonState.Down);
// Up stream
var buttonUpObservable = button.OnPointerUpAsObservable().Select(x => ButtonState.Up);
// Combined stream, up and down
var buttonObservable = buttonDownObservable.Merge(buttonUpObservable);
buttonObservable
// Use Anonymous Types for storing state
.Scan(new { accTimer = 0.0f, previousState = ButtonState.None }, (acc, next) => {
var newAccTimer = 0.0f;
var state = ButtonState.None;
if (next == ButtonState.Down)
{
newAccTimer = Time.timeSinceLevelLoad;
state = ButtonState.Down;
}
else if (next == ButtonState.Up)
{
newAccTimer = Time.timeSinceLevelLoad - acc.accTimer;
state = ButtonState.Up;
}
// Debug.Log(next.ToString());
return(new { accTimer = newAccTimer, previousState = state });
})
// Filter, only interested in up event
.Where(x => x.previousState == ButtonState.Up)
.Subscribe(x => {
// Debug.Log(x.accTimer);
label.text = $"Pressed for {x.accTimer} seconds";
})
.AddTo(_compositeDisposable);
}
