play method
void
play()
Implementation
void play() {
_streamSubscription = Stream<Duration>.periodic(
config.periodic,
(_) {
if (!(_streamSubscription?.isPaused ?? true)) {
if (_isCountUp) {
return _durationLeft += config.periodic;
} else {
return _durationLeft -= config.periodic;
}
}
return Duration.zero;
},
).listen(
(event) {
if (_streamController.isClosed) return;
_streamController.add(_durationLeft);
if (isDone) _onDone();
},
);
}