Can layout and logic separated in flutter? - flutter

Question

I understand presence Bloc and Scoped Model in flutter.
But that isn't separate like a layout file in java's SpringBoot.

Answer 1

You can actually separate layout and logic in flutter. I have an example.
In my LoginForm I have a function
_attemptLogin() {
BlocProvider.of<LoginBloc>(context).add(
LoginButtonPressed(
context: context,
email: _tecEmail.text,
password: _tecPassword.text,
),
);
}
called by
RaisedButton(
color: Colors.blue,
child: const Text(
'Login',
style: TextStyle(
color: Colors.white,
),
),
onPressed: (state is LoginProcessing)
? null
: _attemptLogin,
),
and in my LoginBloc, I have the ff code inside mapEventToState
#override
Stream<LoginState> mapEventToState(LoginEvent event) async* {
if (event is LoginButtonPressed) {
yield LoginProcessing();
await Future.delayed(const Duration(milliseconds: 250));
try {
var loginResponse =
await _attemptLogin(userRepository, event.email, event.password);
/// Get Firebase Token
final firebaseToken =
await Provider.of<FirebaseMessagingProvider>(context).getToken();
if (loginResponse['data'] != null && firebaseToken != null) {
User user =
_setUserFromJsonMap(context, loginResponse['data']['user']);
IdentityToken identityToken = _setIdentityTokenFromJsonMap(
context, loginResponse['data']['token']);
/// Request Firebase Token Update
var jsonCreateUserFirebaseTokenResponse =
await _attemptFirebaseTokenUpdate(context, firebaseToken);
if (jsonCreateUserFirebaseTokenResponse != null) {
authBloc.add(LoggedIn(identityToken: identityToken));
yield LoginInitial();
}
} else {
yield LoginFailure(message: 'Login failed.');
}
} catch (error, stackTrace) {
print(error);
print(stackTrace);
await Future.delayed(const Duration(seconds: 1));
yield LoginFailure(
message: 'Login failed. Please check your internet connection.');
}
}
}
I didn't include all the other functions/classes as I have already deleted several lines of code to make it look readable, since it contains a ton of code already; which is unnecessary for only trying to prove a point that you can actually separate code for your view and logic.