duration property

Duration get duration

Returns the timer duration

Implementation

Duration get duration => _duration;

set duration (Duration duration)

Changes the timer duration.
If the new duration is greater than the current one, then a new duration value is set.
If the new duration is less than the current duration, then a check is made to see if the new duration value points to a time in the past.
If the time has already expired, the duration is set to the current time and the timer is terminated by calling the handler.

Does not perform any action if the timer is no longer active.

Implementation

set duration(Duration duration) {
  if (_callback == null) {
    return;
  }

  if (duration.inMicroseconds == _duration.inMicroseconds) {
    return;
  }

  final elapsedMicroseconds = _stopwatch.elapsedMicroseconds;
  final remaining = duration.inMicroseconds - elapsedMicroseconds;
  if (remaining <= 0) {
    _duration = Duration(microseconds: elapsedMicroseconds);
    _handle();
    return;
  }

  _duration = duration;
  _timer.cancel();
  duration = Duration(microseconds: remaining);
  _timer = Timer(duration, _handle);
}