fadeOut method

Future<void> fadeOut({ Duration duration = const Duration(milliseconds: 500), })

Fades out the torch smoothly over the specified duration. Uses torch strength control for smooth transition on supported devices. Falls back to immediate disable on devices without strength control.

duration - The duration of the fade out effect (default: 500ms).

Implementation

Future<void> fadeOut(
    {Duration duration = const Duration(milliseconds: 500)}) async {
  final maxStrength = await getMaxStrength();
  final currentStrength = await getCurrentStrength();

  if (maxStrength == 0 || currentStrength == 0) {
    // Device doesn't support strength control or torch is off, just disable immediately
    await disable();
    return;
  }

  // Gradually decrease strength
  const steps = 20;
  final stepDuration = duration.inMilliseconds ~/ steps;
  final strengthDecrement = currentStrength / steps;

  for (int i = 1; i <= steps; i++) {
    final strength = (currentStrength - (strengthDecrement * i)).round();
    await setStrength(strength.clamp(0, maxStrength));
    if (i < steps) {
      await Future.delayed(Duration(milliseconds: stepDuration));
    }
  }

  // Ensure torch is off at the end
  await disable();
}