Slow Web example

main.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'dart:ui';
import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Slow Web Demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final double backgroundBlurFactor = 3.0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        fit: StackFit.expand,
        children: [
          Container(
            decoration: BoxDecoration(
              image: DecorationImage(
                image: NetworkImage(
                    'https://images.pexels.com/photos/531880/pexels-photo-531880.jpeg?auto=compress&cs=tinysrgb&dpr=3&h=750&w=1260'),
                fit: BoxFit.cover,
              ),
            ),
            child: BackdropFilter(
              filter: ImageFilter.blur(
                sigmaX: backgroundBlurFactor,
                sigmaY: backgroundBlurFactor,
              ),
              child: Container(
                decoration: BoxDecoration(color: Colors.white.withOpacity(0.0)),
              ),
            ),
          ),
          Center(
            child: Container(
              child: RaisedButton(
                onPressed: () {
                  Navigator.push(
                      context,
                      MaterialPageRoute(
                          builder: (context) => ForgotPasswordScreen()));
                },
                child: Text(
                  "Forgot password?",
                  textScaleFactor: .9,
                ),
              ),
            ),
          ),
        ],
      ),
    );
  }
}

class ForgotPasswordScreen extends StatefulWidget {
  ForgotPasswordScreen({Key key}) : super(key: key);

  @override
  _ForgotPasswordScreenState createState() => _ForgotPasswordScreenState();
}

class _ForgotPasswordScreenState extends State<ForgotPasswordScreen> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Forgot password'),
      ),
      body: Container(),
    );
  }
}