scrollbar.1.dart 1.37 KB
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// 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.

import 'package:flutter/material.dart';

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/// Flutter code sample for [Scrollbar].
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void main() => runApp(const ScrollbarExampleApp());
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class ScrollbarExampleApp extends StatelessWidget {
  const ScrollbarExampleApp({super.key});
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  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
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        appBar: AppBar(title: const Text('Scrollbar Sample')),
        body: const ScrollbarExample(),
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      ),
    );
  }
}

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class ScrollbarExample extends StatefulWidget {
  const ScrollbarExample({super.key});
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  @override
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  State<ScrollbarExample> createState() => _ScrollbarExampleState();
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}

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class _ScrollbarExampleState extends State<ScrollbarExample> {
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  final ScrollController _controllerOne = ScrollController();

  @override
  Widget build(BuildContext context) {
    return Scrollbar(
      controller: _controllerOne,
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      thumbVisibility: true,
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      child: GridView.builder(
        controller: _controllerOne,
        itemCount: 120,
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        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 3),
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        itemBuilder: (BuildContext context, int index) {
          return Center(
            child: Text('item $index'),
          );
        },
      ),
    );
  }
}