farmer_client/lib/widgets/Modal.dart

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

class Dialog extends StatelessWidget {

  String title;
  String type;
  String? message;
  Widget? content;
  VoidCallback? onConfirm;
  VoidCallback? onCancel;

  Dialog({Key? key,
    this.type = 'alert',
    required this.title,
    this.message,
    this.content,
    this.onConfirm,
    this.onCancel,
  }): super(key: key);

  Widget _confirmBtn() {
    return ElevatedButton(
      child: const Text("确定"),
      style: ElevatedButton.styleFrom(
          primary: const Color(0xFFFF703B),
          textStyle: TextStyle(color: Colors.white, fontSize: 20.sp, letterSpacing: 5.sp),
          elevation: 0,
          minimumSize: Size(90.w, 49.w),
          shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.all(Radius.circular(24.5.w)),
          )
      ),
      onPressed: onConfirm,
    );
  }

  Widget _cancelBtn() {
    return ElevatedButton(
      child: const Text("取消"),
      style: ElevatedButton.styleFrom(
        primary: Colors.transparent,
        textStyle: TextStyle(color: const Color(0xFFFF703B), fontSize: 20.sp, letterSpacing: 5.sp),
        elevation: 0,
        minimumSize: Size(90.w, 49.w),
        shape: RoundedRectangleBorder(
          side: const BorderSide(color: Color(0xFFFF703B), width: 2.0),
          borderRadius: BorderRadius.all(Radius.circular(24.5.w)),
        )
      ),
      onPressed: onCancel,
    );
  }

  Widget _alert() {
    return SimpleDialog(
      title: Text(title),
        children: [
          if (null != message) Text(message!),
          if (null != content) content!,
          Center(
            child: _confirmBtn(),
          )
        ]
    );
  }

  Widget _dialog() {
    return SimpleDialog(
        title: Text(title),
        children: [
          if (null != message) Text(message!),
          if (null != content) content!,
          Row(
            children: [
              Center(
                child: _confirmBtn(),
              ),
              Center(
                child: _cancelBtn(),
              )
            ],
          )
        ]
    );
  }

  @override
  Widget build(BuildContext context) {
    return type == 'alert' ? _alert() : _dialog();
  }

}