flutter_login2/lib/pages/login_page.dart

import 'package:flutter/material.dart';
import 'package:flutter_auth/models/config.dart';
import 'package:flutter_auth/pages/background.dart';
import 'package:flutter_auth/pages/register/register_page.dart';
import 'package:flutter_auth/views/already_have_an_account_check.dart';
import 'package:flutter_auth/views/responsive.dart';
import 'package:flutter_svg/flutter_svg.dart';

/// Description: login page
/// Time       : 08/24/2023 Thursday
/// Author     : liuyuqi.gov@msn.cn
class LoginPage extends StatefulWidget {
  const LoginPage({super.key});

  @override
  State<LoginPage> createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  @override
  Widget build(BuildContext context) {
    return Background(
        child: SingleChildScrollView(
      child: SafeArea(
        child: Responsive(
            mobile: buildLoginMobile(), desktop: buildLoginDesktop()),
      ),
    ));
  }

  Widget buildLoginDesktop() {
    return const Row(
      children: [
        Expanded(child: LoginTop()),
        Expanded(
            child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            SizedBox(
              width: 450,
              child: LoginForm(),
            )
          ],
        ))
      ],
    );
  }

  Widget buildLoginMobile() {
    return const Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        LoginTop(),
        Row(
          children: [
            Spacer(),
            Expanded(
              flex: 8,
              child: LoginForm(),
            ),
            Spacer()
          ],
        )
      ],
    );
  }
}

class LoginForm extends StatelessWidget {
  const LoginForm({super.key});

  @override
  Widget build(BuildContext context) {
    return Form(
      child: Column(
        children: [
          TextFormField(
            keyboardType: TextInputType.emailAddress,
            textInputAction: TextInputAction.next,
            cursorColor: kPrimaryColor,
            onSaved: (email) {},
            decoration: const InputDecoration(
              hintText: "邮箱账户",
              prefixIcon: Padding(
                padding: EdgeInsets.all(defaultPadding),
                child: Icon(Icons.person),
              ),
            ),
          ),
          Padding(
            padding: const EdgeInsets.symmetric(vertical: defaultPadding),
            child: TextFormField(
              textInputAction: TextInputAction.done,
              obscureText: true,
              cursorColor: kPrimaryColor,
              decoration: const InputDecoration(
                hintText: "密码",
                prefixIcon: Padding(
                  padding: EdgeInsets.all(defaultPadding),
                  child: Icon(Icons.lock),
                ),
              ),
            ),
          ),
          const SizedBox(height: defaultPadding),
          Hero(
            tag: "login_btn",
            child: ElevatedButton(
              onPressed: () {},
              child: const Text(
                "登录",
              ),
            ),
          ),
          const SizedBox(height: defaultPadding),
          AlreadyHaveAnAccountCheck(
            press: () {
              Navigator.push(
                context,
                MaterialPageRoute(
                  builder: (context) {
                    return const RegisterPage();
                  },
                ),
              );
            },
          ),
        ],
      ),
    );
  }
}

class LoginTop extends StatelessWidget {
  const LoginTop({super.key});

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        const Text(
          "登录",
          style: TextStyle(fontWeight: FontWeight.bold),
        ),
        const SizedBox(height: defaultPadding * 2),
        Row(
          children: [
            const Spacer(),
            Expanded(
              flex: 8,
              child: SvgPicture.asset("assets/icons/login.svg"),
            ),
            const Spacer(),
          ],
        ),
        const SizedBox(height: defaultPadding * 2),
      ],
    );
  }
}