movie_page_view.dart

//1
class MoviePageView extends StatefulWidget {
  final List<MovieEntity> movies;
  final int initialPage;

  const MoviePageView({
    Key key,
    @required this.movies,
    @required this.initialPage,
  })  : assert(initialPage >= 0, 'initialPage cannot be less than 0'),
        super(key: key);

  @override
  _MoviePageViewState createState() => _MoviePageViewState();
}

class _MoviePageViewState extends State<MoviePageView> {
  //2
  PageController _pageController;

  @override
  void initState() {
    super.initState();
    //3
    _pageController = PageController(
      initialPage: widget.initialPage,
      keepPage: false,
      viewportFraction: 0.7,
    );
  }

  @override
  void dispose() {
    //4
    _pageController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    //TODO: PageView.Builder
  }
}