flutter/examples/api/lib/widgets/image/image.loading_builder.0.dart
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---------

Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
2024-12-19 20:06:21 +00:00

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1.5 KiB
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.
import 'package:flutter/material.dart';
/// Flutter code sample for [Image.loadingBuilder].
void main() => runApp(const LoadingBuilderExampleApp());
class LoadingBuilderExampleApp extends StatelessWidget {
const LoadingBuilderExampleApp({super.key});
@override
Widget build(BuildContext context) {
return const MaterialApp(home: LoadingBuilderExample());
}
}
class LoadingBuilderExample extends StatelessWidget {
const LoadingBuilderExample({super.key});
@override
Widget build(BuildContext context) {
return DecoratedBox(
decoration: BoxDecoration(
color: Colors.white,
border: Border.all(),
borderRadius: BorderRadius.circular(20),
),
child: Image.network(
'https://flutter.github.io/assets-for-api-docs/assets/widgets/falcon.jpg',
loadingBuilder: (BuildContext context, Widget child, ImageChunkEvent? loadingProgress) {
if (loadingProgress == null) {
return child;
}
return Center(
child: CircularProgressIndicator(
value:
loadingProgress.expectedTotalBytes != null
? loadingProgress.cumulativeBytesLoaded / loadingProgress.expectedTotalBytes!
: null,
),
);
},
),
);
}
}