Eu consegui resolver o problema fazendo um cast no momento de usar o state.
Colocando um print para ver o tipo notei que com o IF e com o SWITCH era retornado o tipo correto:
I/flutter ( 4104): state: LoadedTransactionsListState
Mas por algum motivo o pré-processador do Dart/Flutter identifica a classe como a classe mãe TransactionsListState) e não como a classe derivada (LoadedTransactionsListState):
Meu código final:
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'transactions_list.dart';
import '../../components/components.dart';
import '../../http/web_clients/transaction_web_cliente.dart';
import '../../models/models.dart';
class TransactionsListView extends StatelessWidget {
final TransactionWebClient webClient;
const TransactionsListView({Key? key, required this.webClient})
: super(key: key);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('Transactions'),
),
body: BlocBuilder<TransactionsListCubit, TransactionsListState>(
builder: (context, state) {
switch (state.runtimeType) {
case InitTransactionsListState:
case LoadingTransactionsListState:
return const Progress();
case LoadedTransactionsListState:
final List<Transaction> transactions =
(state as LoadedTransactionsListState).transactions;
if (transactions.isNotEmpty) {
return ListView.builder(
itemBuilder: (context, index) {
final Transaction transaction = transactions[index];
return Card(
child: ListTile(
leading: const Icon(Icons.monetization_on),
title: Text(
transaction.value.toString(),
style: const TextStyle(
fontSize: 24.0,
fontWeight: FontWeight.bold,
),
),
subtitle: Text(
transaction.contact.accountNumber.toString(),
style: const TextStyle(
fontSize: 16.0,
),
),
),
);
},
itemCount: transactions.length,
);
}
return const CenteredMessage(
message: 'No transactions found',
icon: Icons.warning,
);
default:
// FatalErrorTransactionsListState
return const CenteredMessage(message: 'Unknow Error');
}
},
),
);
}
}
