import 'dart:async';

import 'package:flutter/material.dart';
/// create by 张风捷特烈 on 2022-04-18
/// contact me by email 1981462002@qq.com
/// 说明:
//    {
//      "widgetId": 356,
//      "name": 'Autocomplete基本使用',
//      "priority": 1,
//      "subtitle": "【optionsBuilder】 : 选项构造器   【AutocompleteOptionsBuilder<T>】\n"
//          "【onSelected】 : 选择时回调   【AutocompleteOnSelected<T>】",
//    }
class AutocompleteDemo extends StatelessWidget {
  const AutocompleteDemo({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Autocomplete<String>(
      optionsBuilder: buildOptions,
      onSelected: onSelected,
    );
  }

  void onSelected(String selection) {
      debugPrint('当前选择了 $selection');
    }

  Future<Iterable<String>> buildOptions(
    TextEditingValue textEditingValue,
  ) async {
    if (textEditingValue.text == '') {
      return const Iterable<String>.empty();
    }
    return searchByArgs(textEditingValue.text);
  }

  Future<Iterable<String>> searchByArgs(String args) async{
    // 模拟网络请求
    await Future.delayed(const Duration(milliseconds: 200));
    const List<String> data =  [
      'toly', 'toly49', 'toly42', 'toly56',
      'card', 'ls', 'alex', 'fan sha',
    ];
   return data.where((String name) => name.contains(args));
  }
}