addAnimatableAfterLastOne method

SequenceAnimationBuilder addAnimatableAfterLastOne({ required Animatable animatable, Duration delay = Duration.zero, required Duration duration, Curve curve = Curves.linear, required Object tag, })

Convenient wrapper to add an animatable after the last one is finished

delay is the delay to when this animation should start after the last one finishes. For example:

    SequenceAnimation sequenceAnimation = new SequenceAnimationBuilder()
        .addAnimatable(
          animatable: new ColorTween(begin: Colors.red, end: Colors.yellow),
          from: const Duration(seconds: 0),
          to: const Duration(seconds: 2),
          tag: "color",
        ).addAnimatableAfterLastOne(
           animatable: new ColorTween(begin: Colors.red, end: Colors.yellow),
           delay: const Duration(seconds: 1),
           duration: const Duration(seconds: 1),
           tag: "animation",
        ).animate(controller);

The animation with tag "animation" will start at second 3 and run until second 4.

Implementation

SequenceAnimationBuilder addAnimatableAfterLastOne({
  required Animatable animatable,
  Duration delay: Duration.zero,
  required Duration duration,
  Curve curve: Curves.linear,
  required Object tag,
}) {
  assert(_animations.isNotEmpty, "Can not add animatable after last one if there is no animatable yet");
  var start = _animations.last.to;
  return addAnimatable(animatable: animatable, from: start + delay, to: start + delay + duration, tag: tag, curve: curve);
}