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using value change in flutter widget constructor

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mathiasgodwin answered on January 5, 2023 Popularity 2/10 Helpfulness 1/10

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answer using value change in flutter widget constructor

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using value change in flutter widget constructor

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import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyValueChanger extends StatelessWidget {
  final ValueChanged<String> onValueChanged;

  const MyValueChanger({this.onValueChanged});

  @override
  Widget build(BuildContext context) {
    return RaisedButton(
        child: Text('Press me'),
        onPressed: () => this.onValueChanged('NEW VALUE'));
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: MyValueChanger(
              onValueChanged: (value) => print('Value changed to: $value')),
        ),
      ),
    );
  }
}

Popularity 2/10 Helpfulness 1/10 Language dart

Source: stackoverflow.com

Tags: constructor dart flutter-widget using

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mathiasgodwin

Contributed on Jan 05 2023

mathiasgodwin

0 Answers Avg Quality 2/10

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