highlight method

Future highlight({ bool cancelExisting = true, Duration highlightDuration = _highlightDuration, bool animated = true, })

this function can be called multiple times. every call will reset the highlight style.

Implementation

Future highlight(
    {bool cancelExisting: true,
    Duration highlightDuration: _highlightDuration,
    bool animated: true}) async {
  if (!mounted) return null;

  if (cancelExisting) {
    _cancelAllHighlights(this);
  }

  if (_highlights.containsKey(this)) {
    assert(_controller != null);
    _controller!.stop();
  }

  if (_controller == null) {
    _controller = new AnimationController(vsync: this);
    _highlights[this] = _controller;
  }

  final startKey0 = _startKey = DateTime.now();
  const animationShow = 1.0;
  setState(() {});
  if (animated)
    await catchAnimationCancel(_controller!
        .animateTo(animationShow, duration: scrollAnimationDuration));
  else
    _controller!.value = animationShow;
  await Future.delayed(highlightDuration);

  if (startKey0 == _startKey) {
    if (mounted) {
      setState(() {});
      const animationHide = 0.0;
      if (animated)
        await catchAnimationCancel(_controller!
            .animateTo(animationHide, duration: scrollAnimationDuration));
      else
        _controller!.value = animationHide;
    }

    if (startKey0 == _startKey) {
      _controller = null;
      _highlights.remove(this);
    }
  }
  return null;
}