after_first_frame_mixin

Description:

after first frame mixin

AFTER FIRST FRAME MIXIN #
Features #
Brings functionality to execute code after the first layout of a widget has been performed, i.e. after the first frame has been displayed.
Usage #
This demo showcases how this package resolves the shortcomings shown above:
import 'dart:async';

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

void main() => runApp(const MyApp());

@immutable
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);

@override
Widget build(BuildContext context) {
return const MaterialApp(
title: 'Example',
home: HomeScreen(),
);
}
}

@immutable
class HomeScreen extends StatefulWidget {
const HomeScreen({Key? key}) : super(key: key);

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

class HomeScreenState extends State<HomeScreen>
with AfterFirstFrameMixin<HomeScreen> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
child: const Center(
child: Text("Example"),
),
),
);
}

void showHelloWorld() {
showDialog(
context: context,
builder: (BuildContext context) {
return AlertDialog(
content: const Text('Hello World'),
actions: <Widget>[
TextButton(
onPressed: () => Navigator.of(context).pop(),
child: const Text('DISMISS'),
)
],
);
},
);
}

@override
FutureOr<void> afterFirstFrame(BuildContext context) {
showHelloWorld();
}
}
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