flutter/examples/api/lib/widgets/dismissible/dismissible.0.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Flutter code sample for [Dismissible].

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const MyStatefulWidget(),
      ),
    );
  }
}

class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({super.key});

  @override
  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}

class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  List<int> items = List<int>.generate(100, (int index) => index);

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: items.length,
      padding: const EdgeInsets.symmetric(vertical: 16),
      itemBuilder: (BuildContext context, int index) {
        return Dismissible(
          background: Container(
            color: Colors.green,
          ),
          key: ValueKey<int>(items[index]),
          onDismissed: (DismissDirection direction) {
            setState(() {
              items.removeAt(index);
            });
          },
          child: ListTile(
            title: Text(
              'Item ${items[index]}',
            ),
          ),
        );
      },
    );
  }
}