Switchlike Checkbox (Part 1)

switchlike-checkbox-part1.dart

class SwitchlikeCheckbox extends StatelessWidget {
  final bool checked;

  SwitchlikeCheckbox({this.checked});

  @override
  Widget build(BuildContext context) {
    var tween = MultiTrackTween([
      Track("paddingLeft")
          .add(Duration(milliseconds: 1000), Tween(begin: 0.0, end: 20.0)),
      Track("color").add(Duration(milliseconds: 1000),
          ColorTween(begin: Colors.grey, end: Colors.blue)),
      Track("text")
          .add(Duration(milliseconds: 500), ConstantTween("OFF"))
          .add(Duration(milliseconds: 500), ConstantTween("ON")),
      Track("rotation")
          .add(Duration(milliseconds: 1000), Tween(begin: -2 * pi, end: 0.0))
    ]);

    return ControlledAnimation(
      playback: checked ? Playback.PLAY_FORWARD : Playback.PLAY_REVERSE,
      startPosition: checked ? 1.0 : 0.0,
      duration: tween.duration * 1.2,
      tween: tween,
      curve: Curves.easeInOut,
      builder: _buildCheckbox,
    );
  }

  Widget _buildCheckbox(context, animation) {
    // TODO: implement me
  }
}