import 'dart:ui';
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text(widget.title),
      ),
      body: new Stack(
        children: <Widget>[
          new Positioned(
            left: 0.0,
            top: 0.0,
            right: 0.0,
            bottom: 0.0,
            child: new Image.asset(
              'images/test.jpg',
              fit: BoxFit.fill,
            )
          ),
          new Positioned(
            top: 200.0,
            left: 100.0,
            right: 100.0,
            bottom: 200.0,
            child: new BackdropFilter(
              filter: new ImageFilter.blur(sigmaX: 12.0, sigmaY: 12.0),
//              child: new Text(
//                'test',
//                style: Theme.of(context).textTheme.headline,
//                textAlign: TextAlign.center,
//                maxLines: 1,
//              ),
              child: new Container(
                color: const Color.fromRGBO(0, 0, 0, 0.5),
              ),
            ),
          ),
        ],
      ),
    );
  }
}