get_command 2.0.1
get_command: ^2.0.1 copied to clipboard
Command class to be used within GetControllers. Encapsulate a async function call to simplify UI updates.
class HomeController extends GetxController {
final computationResult = 0.obs;
final GetCommand cmdExecuteComputation = GetCommand();
int _timesCalled = 41;
HomeController() {
cmdExecuteComputation.commandFunc = _longRunningComputation;
}
@override
void onClose() {
cmdExecuteComputation.dispose();
super.onClose();
}
FutureOr<void> _longRunningComputation() async {
await Future.delayed(Duration(seconds: 1));
computationResult.value = _timesCalled++;
}
}
class HomeView extends GetView<HomeController> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('HomeView'),
centerTitle: true,
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text('Service Value:'),
Obx(() {
return Text(
'${controller.computationResult}',
style: TextStyle(fontSize: 20),
);
}),
Obx(() {
return ElevatedButton(
onPressed: controller.cmdExecuteComputation.canBeExecuted
? cmdExecuteComputation.exec
: null,
child: controller.cmdExecuteComputation.executing
? Row(mainAxisSize: MainAxisSize.min, children: [
const Text('Executing'),
CircularProgressIndicator(),
])
: const Text('Call computation'),
);
}),
],
),
),
);
}
}