@override
  Widget build(BuildContext context) {
    _ctx = context;
    var loginBtn = new RaisedButton(
      onPressed: _submit,
      child: new Text("LOGIN"),
      color: Colors.primaries[0],
    );
    var loginForm = new Column(
      children: <Widget>[
        new Text(
          "Login App",
          textScaleFactor: 2.0,
        ),
        new Form(
          key: formKey,
          child: new Column(
            children: <Widget>[
              new Padding(
                padding: const EdgeInsets.all(8.0),
                child: new TextFormField(
                  onSaved: (val) => _username = val,
                  validator: (val) {
                    return val.length < 10
                        ? "Username must have atleast 10 chars"
                        : null;
                  },
                  decoration: new InputDecoration(labelText: "Username"),
                ),
              ),
              new Padding(
                padding: const EdgeInsets.all(8.0),
                child: new TextFormField(
                  onSaved: (val) => _password = val,
                  decoration: new InputDecoration(labelText: "Password"),
                ),
              ),
            ],
          ),
        ),
        _isLoading ? new CircularProgressIndicator() : loginBtn
      ],
      crossAxisAlignment: CrossAxisAlignment.center,
    );

    return new Scaffold(
      appBar: null,
      key: scaffoldKey,
      body: new Container(
        decoration: new BoxDecoration(
          image: new DecorationImage(
              image: new AssetImage("assets/login_background.jpg"),
              fit: BoxFit.cover),
        ),
        child: new Center(
          child: new ClipRect(
            child: new BackdropFilter(
              filter: new ImageFilter.blur(sigmaX: 10.0, sigmaY: 10.0),
              child: new Container(
                child: loginForm,
                height: 300.0,
                width: 300.0,
                decoration: new BoxDecoration(
                    color: Colors.grey.shade200.withOpacity(0.5)),
              ),
            ),
          ),
        ),
      ),
    );
  }