future_bundle

Description:

future bundle

You can use the PageView keeping position of items in Android and IOS.
Usage #
You can get data of Future Functions. The data function is called when each function call is complete. It is sent as a return value as map<int,
dynamic). Int(key) is the index of the Future function list, and dynamic(value) is the return value.
FutureBundle().pack(
futures: [
Future.delayed(const Duration(milliseconds: 100)),
Future.delayed(const Duration(milliseconds: 300)),
Future.delayed(const Duration(milliseconds: 500)),
Future.delayed(const Duration(milliseconds: 700)),
],
data: (data) {
// Data is Map<int, dynamic>.
// Key(int) is index of future.
// Value(dynamic) is value = future .
},
complete: (results) {
// Results is List<dynamic>.
// If you uses three Future Function, List.length is 3.
// Value is return value of future.
},
);
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Also, you can use FutureBundle().pack() as Future Function. The return value of FutureBundle().pack() is Future<List
Future getData() async {
var result = await FutureBundle().pack(futures: [
Future.delayed(const Duration(milliseconds: 100)),
Future.delayed(const Duration(milliseconds: 300)),
Future.delayed(const Duration(milliseconds: 500)),
Future.delayed(const Duration(milliseconds: 700)),
]);

FutureBundle().pack(futures: [
Future.delayed(const Duration(milliseconds: 100)),
Future.delayed(const Duration(milliseconds: 300)),
Future.delayed(const Duration(milliseconds: 500)),
Future.delayed(const Duration(milliseconds: 700)),
]).then((value) {
// Value is List<dynamic>.
});
}
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The timeout function is set by default. The default time is 10 seconds, if you don't want to use it, set the useTimeOut value to false. If you want to
increase the TimeOut time, change the timeOutDuration value.
Example code #
import 'dart:async';

import 'package:flutter/material.dart';
import 'package:future_bundle/future_bundle.dart';

class Home extends StatefulWidget {
const Home({Key? key}) : super(key: key);

@override
_HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
String _first = "";
String _second = "";
String _third = "";

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Column(
children: [
const SizedBox(height: 50),
_text("first : $_first"),
_text("second : $_second"),
_text("third : $_third"),
SizedBox(
height: 50,
width: double.infinity,
child: ElevatedButton(
onPressed: () async {
var bundleData = await FutureBundle().pack(
futures: [
_checkString("first 500", 500),
_checkString("second 2000", 2000),
_checkString("third 1000", 1000),
],
data: (data) {
// for (var key in data.keys) {
// var value = data[key];
// switch (key) {
// case 0:
// _first = value;
// break;
// case 1:
// _second = value;
// break;
// case 2:
// _third = value;
// break;
// }
// setState(() {});
// }
},
complete: (results) {
// setState(() {
// _first = results[0];
// _second = results[1];
// _third = results[2];
// });
},
);

setState(() {
_first = bundleData[0];
_second = bundleData[1];
_third = bundleData[2];
});
},
child: const Text("call FutureBundle")),
),
],
),
);
}

Widget _text(String value) {
return SizedBox(
height: 50, child: Text(value, style: const TextStyle(fontSize: 20)));
}

Future<String> _checkString(String result, int duration) async {
await Future.delayed(Duration(milliseconds: duration));
return result;
}
}
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