farmer_client/lib/pages/search/index.dart

import 'dart:async';

import 'package:farmer_client/widgets/layout/BasicPage.dart';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_easyrefresh/easy_refresh.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:get/get.dart';
import 'package:get/get_rx/src/rx_types/rx_types.dart';

import '../../models/app.dart';
import '../../models/entities/CardListModel.dart';
import '../../services/homeAPI.dart';
import '../../widgets/CarsCard.dart';
import '../../widgets/NullCard.dart';
import 'dart:async';

class SearchPage extends BasicPage {
  EasyRefreshController _controller = EasyRefreshController();

  final cardSearchList = Rx<List<CardListModel>>([]);
  final newCardSearchList = Rx<List<CardListModel>>([]);
  var pageIndex = 1; //页数
  var count = 10; //每页10条
  late int maxSum; //最多条数
   String value=''; //最多条数
  int _count = 0;

  var location = AppController.t.locationStr;

  void _onChange(String value) {
    Map<String, dynamic> params = {'pageNum': 1,'location':AppController.t.locationStr,'q':value};

    getNewData(params);
    // searchMachinery(params).then((value) {
    //   EasyLoading.show(status: '数据加载中...');
    //   final list = <CardListModel>[];
    //   value['records'].forEach((item) {
    //     list.add(CardListModel.fromJson(item));
    //   });
    //   cardSearchList(list);
    //   newCardSearchList(list);
    //   EasyLoading.dismiss();
    //
    // });
  }


  void getNewData(Map? params) {
    pageIndex = 1;
    params!['pageNum'] = pageIndex;
    print(params['pageNum']);
    searchMachinery(params).then((value) {
      maxSum = value['total'];

      List<CardListModel> list = [];
      value['records'].forEach((item) {
        list.add(CardListModel.fromJson(item));
      });
      cardSearchList(list);
      newCardSearchList(list);
      _count = cardSearchList.value.length;
    });
  }

  void getMoreData(Map? params) {
    pageIndex++;
    params!['pageNum'] = pageIndex;
    print(params['pageNum']);
    searchMachinery(params).then((value) {
      maxSum = value['total'];
      List<CardListModel> list = [];
      List<CardListModel> Newlist = [];
      value['records'].forEach((item) {
        list.add(CardListModel.fromJson(item));
      });
      newCardSearchList.value.addAll(list);
      Newlist.addAll(newCardSearchList.value);
      cardSearchList(Newlist);
      _count = cardSearchList.value.length;
    });
  }

  @override
  Widget builder(BuildContext context) {
    naviTitle = '搜索';
    return Container(
        child: Column(children: [
      Container(
        width: 345.w,
        height: 34.h,
        margin: EdgeInsets.symmetric(vertical: 15.h, horizontal: 15.w),
        padding: EdgeInsets.symmetric(vertical: 0, horizontal: 10.w),
        decoration: BoxDecoration(
            color: Color(0xFFf8f8f8),
            borderRadius: BorderRadius.all(Radius.circular(17.w))),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Image.asset(
              'images/icons/search.png',
              width: 15.w,
              height: 15.w,
            ),
            Container(
              width: 300.w,
              margin: EdgeInsets.fromLTRB(5.w, 0, 0, 0),
              child: TextField(
                style: TextStyle(fontSize: 14.sp),
                decoration: const InputDecoration(
                  isCollapsed: true,
                  hintText: '搜索关键字查询',
                  border: InputBorder.none,
                  counterText: '', //去掉计数
                  floatingLabelBehavior: FloatingLabelBehavior.never,
                ),
                onChanged: (e) {
                  _onChange(e);
                },
              ),
            ),
          ],
        ),
      ),
          Expanded(
            child:
            (
                EasyRefresh(
                  controller: _controller,
                  firstRefresh: true,
                  onRefresh: () async {
                    await Future.delayed(Duration(seconds: 1), () {
                      print("下拉刷新-----");
                      Map<String, dynamic> params = {'pageNum': pageIndex,'location':AppController.t.locationStr,'q':value};

                      getNewData(params);
                      _controller.resetLoadState();
                    });
                  },
                  onLoad: () async {
                    await Future.delayed(Duration(seconds: 1), () {
                      if (_count == maxSum) {
                        Fluttertoast.showToast(msg: '暂无更多数据哦');
                      } else {
                        Map<String, dynamic> params = {'pageNum': pageIndex,'location':AppController.t.locationStr,'q':value};

                        getMoreData(params);
                      }
                      _controller.finishLoad(noMore: _count >= maxSum);

                    });
                  },
                  child: Obx(
                        () => cardSearchList.value.length > 0
                        ?
                    Column(
                      mainAxisSize: MainAxisSize.min,
                      children: cardSearchList.value
                          .map((item) => CarsCard(item: item))
                          .toList(),
                    ): NullCard(text: '暂无农机信息！'),
                  ),
                )

            ),
          )
    ]));
  }
}