flutter/examples/api/lib/widgets/image/image.frame_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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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.frameBuilder].
void main() => runApp(const FrameBuilderExampleApp());
class FrameBuilderExampleApp extends StatelessWidget {
const FrameBuilderExampleApp({super.key});
@override
Widget build(BuildContext context) {
return const MaterialApp(home: FrameBuilderExample());
}
}
class FrameBuilderExample extends StatelessWidget {
const FrameBuilderExample({super.key});
@override
@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/puffin.jpg',
frameBuilder: (
BuildContext context,
Widget child,
int? frame,
bool wasSynchronouslyLoaded,
) {
if (wasSynchronouslyLoaded) {
return child;
}
return AnimatedOpacity(
opacity: frame == null ? 0 : 1,
duration: const Duration(seconds: 1),
curve: Curves.easeOut,
child: child,
);
},
),
);
}
}