intro-to-flutter-28.dart

@override
Widget build(BuildContext context) => Scaffold(
      body: SingleChildScrollView(
        child: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 16),
          child: Column(
            children: <Widget>[
              Padding(
                padding: const EdgeInsets.only(top: 145, bottom: 102),
                child: SvgPicture.asset(
                  'assets/mews_logo.svg',
                  height: 28,
                  width: 136,
                ),
              ),
              StreamBuilder<String>(
                stream: bloc.email,
                builder: (context, snapshot) => MewsInputField(
                  textInputAction: TextInputAction.next,
                  onSubmitted: (_) {
                    FocusScope.of(context).requestFocus(_passwordFocus);
                  },
                  label: _translate(TranslationKey.UserNameOrEmail),
                  placeholder: _translate(TranslationKey.UserNameOrEmail),
                  onChanged: bloc.onEmailChanged,
                  keyboardType: TextInputType.emailAddress,
                  error: (snapshot.error as ValidationError)?.message,
                  isRequired: true,
                ),
              ),
              Padding(
                padding: const EdgeInsets.only(top: 24),
                child: StreamBuilder<String>(
                  stream: bloc.password,
                  builder: (context, snapshot) => MewsInputField(
                    enableInteractiveSelection: true,
                    textInputAction: TextInputAction.go,
                    onSubmitted: (_) => _logIn(),
                    focusNode: _passwordFocus,
                    isPasswordField: true,
                    label: _translate(TranslationKey.Password),
                    placeholder: _translate(TranslationKey.Password),
                    onChanged: bloc.onPasswordChanged,
                    error: (snapshot.error as ValidationError)?.message,
                    isRequired: true,
                  ),
                ),
              ),
              Padding(
                padding: const EdgeInsets.only(top: 40),
                child: MewsFillButton(
                  minWidth: double.infinity,
                  onPressed: _logIn,
                  text: _translate(TranslationKey.SignIn),
                ),
              ),
              Padding(
                padding: const EdgeInsets.only(top: 16),
                child: StreamBuilder<Environment>(
                  stream: _environmentBloc.environment,
                  initialData: Environment.production,
                  builder: (context, snapshot) => MewsGhostButton(
                    minWidth: double.infinity,
                    text: 'Environment: ${snapshot.data.name}',
                    onPressed: _displayChangeEnvironmentDialog,
                  ),
                ),
              )
            ],
          ),
        ),
      ),
    );