liangchengyou / wow_english

  import 'package:flutter/cupertino.dart';
  import 'package:flutter_bloc/flutter_bloc.dart';

  import 'package:wow_english/pages/reading/widgets/ReadingModeType.dart';

  
  part 'reading_event.dart';
  part 'reading_state.dart';
  
  class ReadingPageBloc extends Bloc<ReadingPageEvent, ReadingPageState> {

  
    final PageController pageController;
  
    ///当前页索引
    int _currentPage = 0;
  
    ///当前播放模式
    ReadingModeType _currentMode = ReadingModeType.auto;
  
    int get currentPage => _currentPage + 1;
  
    ReadingModeType get currentMode => _currentMode;
  
    ReadingPageBloc(this.pageController) : super(ReadingPageInitial()) {
      on<CurrentPageIndexChangeEvent>(_pageControllerChange);
      on<CurrentModeChangeEvent>(_selectItemLoad);
      // pageController.addListener(() {
      //   _currentPage = pageController.page!.round();
      // });
    }
  
    @override
    Future<void> close() {
      pageController.dispose();
      return super.close();
    }
  
    void _pageControllerChange(CurrentPageIndexChangeEvent event, Emitter<ReadingPageState> emitter) async {
      _currentPage = event.pageIndex;
      emitter(CurrentPageIndexState());
    }
  
    void _selectItemLoad(CurrentModeChangeEvent event, Emitter<ReadingPageState> emitter) async {
      if (_currentMode == ReadingModeType.auto) {
        _currentMode = ReadingModeType.manual;
      } else {
        _currentMode = ReadingModeType.auto;
      }
      emitter(CurrentModeState());

    }
  }