import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:zhiying_comm/zhiying_comm.dart';
import 'package:zhiying_comm/util/base_bloc.dart';

///每个页面顶层使用这个状态
abstract class BasePageState<T extends StatefulWidget> extends State<T> {
  // Widget build(BuildContext context) {
  //   return MultiProvider(providers: [
  //     ChangeNotifierProvider.value(value: BaseChangeNotifier()),
  //   ], child: child);
  // }

  BaseChangeNotifier baseChangeNotifier;

  @override
  Widget build(BuildContext context) {
    if(baseChangeNotifier==null){
      baseChangeNotifier = BaseChangeNotifier();
    }
    return MultiProvider(providers: [
      ChangeNotifierProvider.value(value: baseChangeNotifier),
    ], child: buildX(context));
  }

  Widget buildX(BuildContext context);

  ///刷新，所继承的子类调用此方法可刷新子组件
  void refreshPage() {
    baseChangeNotifier.refresh();
  }

}

///每个需要刷新的小组件使用这个状态
abstract class BaseWidgetState<T extends StatefulWidget> extends State<T> {

  RefreshListener refreshListener = RefreshListener();

  @override
  void didChangeDependencies() {
    refreshListener.listen(context, (value) {
      print("刷新子控件");
      refreshWidget(value);
    });
    super.didChangeDependencies();
  }

  @override
  void dispose() {
    //refreshListener?.close();
    super.dispose();
  }

  void refreshWidget(String value);
}