farmer_client/lib/pages/machinery/detail/widgets/detail.dart

import 'package:flutter/widgets.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

import '../../widgets/summary.dart';

Widget page({ required BuildContext context, required Size appbarSize, required void Function() handleClick}) {
  final _offset = 20.w;
  final width = MediaQuery.of(context).size.width;
  final height = MediaQuery.of(context).size.height
      - appbarSize.height
      - MediaQuery.of(context).padding.top;
  final _bannerHeight = 250.w;
  final img = 'https://yz-websit.oss-cn-hangzhou.aliyuncs.com/xlk/index-icon19.jpg';

  return Stack(
    alignment: Alignment.topCenter,
      children: [
        // 第一个组件用来撑满全屏
        SizedBox(
          width: width,
          height: height,
        ),
        Positioned(
          left: 0,
          top: 0,
          child: SizedBox(
            height: _bannerHeight,
            child: _banner(img),
          ),
        ),
        Positioned(
          left: 0,
          top: _bannerHeight - _offset,
          child: _content(context),
        ),
      ],
  );
}

Widget _banner(String imgUrl) {
  return Image.network(imgUrl);
}

Widget _content(BuildContext context) {
  final _border = 20.w;
  return Container(
    width: MediaQuery.of(context).size.width,
    padding: EdgeInsets.only(top: 45.w, left: 15.w, right: 15.w, bottom: 20.w),
    decoration: BoxDecoration(
      color: Colors.white,
        borderRadius: BorderRadius.vertical(top: Radius.circular(_border))
    ),
    child: Column(
      children: [
        summary(),
      ],
    ),
  );
}