Kingkor Roy Tirtho
75 lines
2.1 KiB
Dart
75 lines
2.1 KiB
Dart
import 'dart:math';
|
|
|
|
import 'package:fl_query/fl_query.dart';
|
|
import 'package:flutter/material.dart';
|
|
|
|
final jobWithExternalData = QueryJob<String, double>(
|
|
queryKey: "query-external-data",
|
|
cacheTime: const Duration(seconds: 10),
|
|
task: (queryKey, data) {
|
|
return Future.delayed(const Duration(milliseconds: 500),
|
|
() => "Hello from $queryKey with $data");
|
|
},
|
|
);
|
|
|
|
class QueryExternalDataExample extends StatefulWidget {
|
|
const QueryExternalDataExample({Key? key}) : super(key: key);
|
|
|
|
@override
|
|
State<QueryExternalDataExample> createState() =>
|
|
_QueryExternalDataExampleState();
|
|
}
|
|
|
|
class _QueryExternalDataExampleState extends State<QueryExternalDataExample> {
|
|
late double externalData;
|
|
|
|
@override
|
|
void initState() {
|
|
super.initState();
|
|
externalData = Random().nextDouble() * 200;
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return Column(
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: [
|
|
Text(
|
|
"# Query With External Data Example",
|
|
style: Theme.of(context).textTheme.headline5,
|
|
),
|
|
QueryBuilder<String, double>(
|
|
job: jobWithExternalData,
|
|
externalData: externalData,
|
|
builder: (context, query) {
|
|
if (query.isLoading || query.isRefetching || !query.hasData) {
|
|
return const CircularProgressIndicator();
|
|
}
|
|
return Row(
|
|
children: [
|
|
Container(
|
|
width: query.externalData,
|
|
height: query.externalData,
|
|
decoration: const BoxDecoration(
|
|
shape: BoxShape.circle,
|
|
color: Colors.blue,
|
|
),
|
|
child: Center(child: Text(query.externalData.toString())),
|
|
),
|
|
ElevatedButton(
|
|
child: const Text("New Id"),
|
|
onPressed: () {
|
|
setState(() {
|
|
externalData = Random().nextDouble() * 200;
|
|
});
|
|
},
|
|
)
|
|
],
|
|
);
|
|
},
|
|
),
|
|
],
|
|
);
|
|
}
|
|
}
|