Visa/lib/detail/country_detail.dart

import 'dart:html';

import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:hengyi/utils/dio_util.dart';

class CountryDetailWidget extends StatelessWidget {
  CountryDetailWidget(this.countryId, {super.key});

  final int countryId;

  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
        future: NetworkUtil().getCountryDetail(countryId),
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.done) {
            if (snapshot.hasData) {
              return Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Expanded(
                    flex: 1,
                    child: Column(
                      children: [
                        Container(
                          margin: const EdgeInsets.only(top: 20),
                          height: 150,
                          child: Row(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: [
                              Text(
                                snapshot.data?.countryName ?? "",
                                style: const TextStyle(
                                    fontSize: 24,
                                    fontWeight: FontWeight.bold,
                                    color: Colors.black),
                              ),
                              Image(
                                image: NetworkImage(
                                    snapshot.data?.countryImgUrl ?? ""),
                                width: 200.w,
                                height: 150.w,
                              ),
                            ],
                          ),
                        ),
                        Container(
                          color: Colors.grey[300],
                          height: 60.h,
                          width: 800.w,
                          margin: EdgeInsets.only(top: 20.w),
                          child: Row(
                            mainAxisAlignment: MainAxisAlignment.start,
                            children: [
                              Row(
                                children: [
                                  Text(
                                    "签证须知：",
                                    style: TextStyle(
                                        fontSize: 14.sp,
                                        color: Colors.red,
                                        fontWeight: FontWeight.bold),
                                  ),
                                  Text(
                                    snapshot.data?.countryContent ?? "",
                                    style: TextStyle(
                                        fontSize: 14.sp,
                                        color: Colors.black,
                                        fontWeight: FontWeight.bold),
                                  ),
                                ],
                              )
                            ],
                          ),
                        ),
                        GestureDetector(
                          onTap: () {
                            if (snapshot.data != null &&
                                snapshot.data!.countryVisitVisaUrl.isNotEmpty) {
                              downLoadFile(snapshot.data!.countryVisitVisaUrl);
                            }
                          },
                          child: Container(
                            margin: EdgeInsets.only(top: 20.w),
                            child: Text(
                              "${snapshot.data?.countryName ?? ""}-旅游签证材料清单",
                              style: TextStyle(
                                  fontSize: 14.sp,
                                  color: Colors.red,
                                  fontWeight: FontWeight.bold),
                            ),
                          ),
                        ),
                        GestureDetector(
                          onTap: () {
                            if (snapshot.data != null &&
                                snapshot.data!.countryVisitVisaUrl.isNotEmpty) {
                              downLoadFile(
                                  snapshot.data!.countryBusinessVisaUrl);
                            }
                          },
                          child: Container(
                            margin: EdgeInsets.only(top: 20.w),
                            child: Text(
                              "${snapshot.data?.countryName ?? ""}-商务签证材料清单",
                              style: TextStyle(
                                  fontSize: 14.sp,
                                  color: Colors.red,
                                  fontWeight: FontWeight.bold),
                            ),
                          ),
                        )
                      ],
                    ),
                  ),
                ],
              );
            } else {
              return Text("Error:${snapshot.error}");
            }
          } else {
            return Container(
              alignment: Alignment.center,
              child: const CircularProgressIndicator(),
            );
          }
        });
  }

  ///调用浏览器的下载功能下载文件
  downLoadFile(url) {
    AnchorElement anchorElement = AnchorElement(href: url);
    anchorElement.download = "资料";
    anchorElement.click();
  }
}