How can you reload data that is generated through Builder BlocConsumer? - flutter

Question

I tried to write my own action Future using . clear() and re-generate it in the same place, but it didn't work.
For example, it first generates data for the month of the last image (August), selects May and it clears August data and generates for May.
To explain: I get data for several months or years, for example: August 2022, May 2022, December 2021, etc.
To make the code more optimized I want to generate first for the last incoming item, and then when I click on a certain month in the dropdown, deleting the old data to generate new data for the month and year he chose.
#override
Widget build(BuildContext context) {
final _provider = Provider.of<MapRepository>(context);
currentIndicator = _provider.fieldIndicator;
filterLayer = _provider.filterLayer;
selectedMonth = currentIndicator != null ? currentIndicator!.getMonth : "";
selectedYear = currentIndicator != null ? currentIndicator!.getYear : "";
String dateMonth =
currentIndicator != null ? "$selectedMonth $selectedYear" : "Загрузка";
_controller = FixedExtentScrollController(initialItem: 0);
return BlocConsumer(
bloc: indicatorBloc,
listener: (context, state) {
if (state is FetchedIndicatorsState) {
int lastPresent = 0;
Future.delayed(Duration(seconds: 1)).then((value) {
for (int i = 0; i < indicators.length; i++) {
if (indicators.reversed.toList()[i].isPresent) {
lastPresent = i;
}
dates.add(indicators[i].getDateTime);
}
for (var date in dates) {
String shortMonth = DateFormat("MMM", "ru").format(date);
String year = DateFormat("yy", "ru").format(date);
String month =
DateFormat("MMMM", "ru").format(date).toCapitalized();
indicatorDates['$shortMonth$year'] = '$month ${date.year}';
}
selectIndicator(indicators.reversed.toList()[lastPresent]);
});
}
},
builder: (context, state) {
if (state is FetchedIndicatorsState) {
indicators = state.indicators;
for (int i = 0; i < indicators.length; i++) {
if (indicators[i].getMonth == selectedMonth &&
indicators[i].getYear == selectedYear) {
childrenIndicators.add(buildIndicator(
indicators[i], indicators[(i - 1 < 0) ? 0 : (i - 1)], i));
}
}
return buildBody(context, dateMonth, childrenIndicators);
}
return Container();
},
);
}
OnTap actions:
onTap: () {
_refreshData();
setState(() {
selectedYear = entry.value.substring(entry.value.length - 5);
selectedMonth = entry.value.substring(0, entry.value.length - 5);
});
Navigator.pop(context);
},
My action:
Future _refreshData() async {
await Future.delayed(Duration(seconds: 3));
childrenIndicators.clear();
for (int i = 0; i < indicators.length; i++) {
if (indicators[i].getMonth == selectedMonth &&
indicators[i].getYear == selectedYear) {
childrenIndicators.add(buildIndicator(
indicators[i], indicators[(i - 1 < 0) ? 0 : (i - 1)], i));
}
}
setState(() {});
}