animated_fractionally_sized_box 2.0.1 animated_fractionally_sized_box: ^2.0.1 copied to clipboard
Animated version of FractionallySizedBox that gradually changes its values over a period of time.
import 'package:animated_fractionally_sized_box/animated_fractionally_sized_box.dart';
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Animated Fractionally Sized Box Exaple',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Example'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
final int min = 0;
final int max = 10;
final double height = 10;
late int counter;
@override
void initState() {
counter = min;
super.initState();
}
void increment() {
setState(() {
counter++;
counter = counter.clamp(min, max);
});
}
void decrement() {
setState(() {
counter--;
counter = counter.clamp(min, max);
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Container(
padding: const EdgeInsets.all(8.0),
alignment: Alignment.center,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Stack(
children: [
Container(
height: height,
color: Colors.black,
),
AnimatedFractionallySizedBox(
duration: Duration(milliseconds: 500),
widthFactor: counter / max,
child: Container(
height: height,
color: Colors.green,
),
),
],
),
ElevatedButton(onPressed: increment, child: Text('Increment')),
ElevatedButton(onPressed: decrement, child: Text('Decrement')),
],
),
),
);
}
}