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This auto-formats all *.dart files in the repository outside of the `engine` subdirectory and enforces that these files stay formatted with a presubmit check. **Reviewers:** Please carefully review all the commits except for the one titled "formatted". The "formatted" commit was auto-generated by running `dev/tools/format.sh -a -f`. The other commits were hand-crafted to prepare the repo for the formatting change. I recommend reviewing the commits one-by-one via the "Commits" tab and avoiding Github's "Files changed" tab as it will likely slow down your browser because of the size of this PR. --------- Co-authored-by: Kate Lovett <katelovett@google.com> Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
86 lines
2.8 KiB
Dart
86 lines
2.8 KiB
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/material.dart';
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/// Flutter code sample for [SliverAppBar].
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void main() {
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runApp(const StretchableSliverAppBar());
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}
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class StretchableSliverAppBar extends StatefulWidget {
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const StretchableSliverAppBar({super.key});
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@override
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State<StretchableSliverAppBar> createState() => _StretchableSliverAppBarState();
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}
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class _StretchableSliverAppBarState extends State<StretchableSliverAppBar> {
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bool _stretch = true;
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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home: Scaffold(
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body: CustomScrollView(
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physics: const BouncingScrollPhysics(),
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slivers: <Widget>[
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SliverAppBar(
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stretch: _stretch,
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onStretchTrigger: () async {
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// Triggers when stretching
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},
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// [stretchTriggerOffset] describes the amount of overscroll that must occur
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// to trigger [onStretchTrigger]
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//
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// Setting [stretchTriggerOffset] to a value of 300.0 will trigger
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// [onStretchTrigger] when the user has overscrolled by 300.0 pixels.
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stretchTriggerOffset: 300.0,
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expandedHeight: 200.0,
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flexibleSpace: const FlexibleSpaceBar(
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title: Text('SliverAppBar'),
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background: FlutterLogo(),
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),
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),
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SliverList(
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delegate: SliverChildBuilderDelegate((BuildContext context, int index) {
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return Container(
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color: index.isOdd ? Colors.white : Colors.black12,
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height: 100.0,
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child: Center(child: Text('$index', textScaler: const TextScaler.linear(5.0))),
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);
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}, childCount: 20),
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),
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],
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),
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bottomNavigationBar: BottomAppBar(
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child: Padding(
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padding: const EdgeInsets.all(8),
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child: OverflowBar(
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overflowAlignment: OverflowBarAlignment.center,
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alignment: MainAxisAlignment.center,
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children: <Widget>[
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Row(
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mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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const Text('stretch'),
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Switch(
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onChanged: (bool val) {
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setState(() {
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_stretch = val;
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});
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},
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value: _stretch,
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),
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],
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),
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],
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),
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),
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),
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),
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);
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}
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}
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