price_tab.dart

class _PriceTabState extends State<PriceTab> with TickerProviderStateMixin {
  final List<FlightStop> _flightStops = [
    FlightStop("JFK", "ORY", "JUN 05", "6h 25m", "\$851", "9:26 am - 3:43 pm"),
    FlightStop("MRG", "FTB", "JUN 20", "6h 25m", "\$532", "9:26 am - 3:43 pm"),
    FlightStop("ERT", "TVS", "JUN 20", "6h 25m", "\$718", "9:26 am - 3:43 pm"),
    FlightStop("KKR", "RTY", "JUN 20", "6h 25m", "\$663", "9:26 am - 3:43 pm"),
  ];

  @override
  Widget build(BuildContext context) {
    return Container(
      width: double.infinity,
      child: Stack(
        alignment: Alignment.center,
        children: <Widget>[_buildPlane()]
          ..addAll(_flightStops.map(_buildStopCard))
          ..addAll(_flightStops.map(_mapFlightStopToDot)),
      ),
    );
  }

  Widget _buildStopCard(FlightStop stop) {
    int index = _flightStops.indexOf(stop);
    double topMargin = _dotPositions[index].value -
        0.5 * (FlightStopCard.height - AnimatedDot.size);
    bool isLeft = index.isOdd;
    return Align(
      alignment: Alignment.topCenter,
      child: Padding(
        padding: EdgeInsets.only(top: topMargin),
        child: Row(
          mainAxisSize: MainAxisSize.max,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            isLeft ? Container() : Expanded(child: Container()),
            Expanded(
              child: FlightStopCard(
                flightStop: stop,
                isLeft: isLeft,
              ),
            ),
            !isLeft ? Container() : Expanded(child: Container()),
          ],
        ),
      ),
    );
  }
}