startCountdown method

LxCountdown startCountdown({ required Duration duration, Duration interval = const Duration(seconds: 1), void onTick(Duration remaining)?, void onFinish()?, })

Starts a reactive countdown.

Returns an LxCountdown object that exposes the LxCountdown.remaining duration and control methods (pause, resume, stop).

• duration: The total duration to count down/up.
• interval: The tick interval (default: 1 second).
• onTick: Called on every interval.
• onFinish: Called when the countdown reaches zero.

Implementation

LxCountdown startCountdown({
  required Duration duration,
  Duration interval = const Duration(seconds: 1),
  void Function(Duration remaining)? onTick,
  void Function()? onFinish,
}) {
  final countdown = LxCountdown(
    totalDuration: duration,
    interval: interval,
    onTick: onTick,
    onFinish: onFinish,
  );
  // Auto-dispose the countdown with the controller
  // Note: Since LxCountdown isn't a reactive itself but holds one, we rely on its dispose.
  // We can't use autoDispose() directly on it unless it's a Disposable.
  // Let's ensure LxCountdown implements Disposable or we track it.
  // For now, we return it and let the user manage or we track it internally if we want rigorous safety.
  // Better: Add to a list of disposables.
  // For simplicity in this mixin, we return it. Ideally, the user calls .dispose() or we track it.
  // To be safe, let's track it in a separate list.
  _countdowns.add(countdown);
  countdown.start();
  return countdown;
}