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<code_start>import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
const Color darkBlue = Color.fromARGB(255, 18, 32, 47);
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
debugShowCheckedModeBanner: false,
home: const Scaffold(
body: Center(
child: ExampleParallax(),
),
),
);
}
}
class ExampleParallax extends StatelessWidget {
const ExampleParallax({
super.key,
});
@override
Widget build(BuildContext context) {
return SingleChildScrollView(
child: Column(
children: [
for (final location in locations)
LocationListItem(
imageUrl: location.imageUrl,
name: location.name,
country: location.place,
),
],
),
);
}
}
class LocationListItem extends StatelessWidget {
LocationListItem({
super.key,
required this.imageUrl,
required this.name,
required this.country,
});
final String imageUrl;
final String name;
final String country;
final GlobalKey _backgroundImageKey = GlobalKey();
@override
Widget build(BuildContext context) {
return Padding(
padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 16),
child: AspectRatio(
aspectRatio: 16 / 9,
child: ClipRRect(
borderRadius: BorderRadius.circular(16),
child: Stack(
children: [
_buildParallaxBackground(context),
_buildGradient(),
_buildTitleAndSubtitle(),
],
),
),
),
);
}
Widget _buildParallaxBackground(BuildContext context) {
return Flow(
delegate: ParallaxFlowDelegate(
scrollable: Scrollable.of(context),
listItemContext: context,
backgroundImageKey: _backgroundImageKey,
),
children: [
Image.network(
imageUrl,
key: _backgroundImageKey,
fit: BoxFit.cover,
),
],
);
}
Widget _buildGradient() {
return Positioned.fill(
child: DecoratedBox(
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [Colors.transparent, Colors.black.withOpacity(0.7)],
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
stops: const [0.6, 0.95],
),
),
),
);