Last active
July 8, 2020 03:01
-
-
Save mfebrianto/73e45219bffb7ff84de5436264d40f60 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
class _MyHomePageState extends State<MyHomePage> { | |
int _counter = 0; | |
incrementCounter(newNumber) { | |
setState(() { | |
_counter = newNumber; | |
}); | |
} | |
@override | |
Widget build(BuildContext context) { | |
return Scaffold( | |
appBar: AppBar( | |
title: Text(widget.title), | |
), | |
body: Center( | |
child: Column( | |
mainAxisAlignment: MainAxisAlignment.center, | |
children: <Widget>[ | |
Text( | |
'You have pushed the button this many times:', | |
), | |
Text( | |
'$_counter', | |
style: Theme.of(context).textTheme.headline4, | |
), | |
], | |
), | |
), | |
floatingActionButton: MyButton(updateCounter: incrementCounter, currentCounter: _counter) | |
); | |
} | |
} | |
class MyButton extends StatelessWidget { | |
final updateCounter; | |
final currentCounter; | |
const MyButton({this.updateCounter, this.currentCounter}); | |
@override | |
Widget build(BuildContext context) { | |
return FloatingActionButton( | |
onPressed: () => updateCounter(currentCounter+1), | |
tooltip: 'Increment', | |
child: Icon(Icons.add) | |
); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment