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flutter_docs

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final string name;
final string uid;
final ImageProvider imageProvider;
string get formattedTotalItemPrice =>
'\$${(totalpricecents / 100.0).tostringasfixed(2)}';
}
class customer {
customer({
required this.name,
required this.imageProvider,
List<Item>? items,
}) : items = items ?? [];
final string name;
final ImageProvider imageProvider;
final List<Item> items;
string get formattedTotalItemPrice {
final totalPriceCents =
items.fold<int>(0, (prev, item) => prev + item.totalPriceCents);
return '\$${(totalpricecents / 100.0).tostringasfixed(2)}';
}
}
<code_end>
<topic_end>
<topic_start>
add material touch ripples
widgets that follow the material design guidelines display
a ripple animation when tapped.
flutter provides the InkWell
widget to perform this effect.
create a ripple effect using the following steps:
<code_start>
// the InkWell wraps the custom flat button widget.
InkWell(
// when the user taps the button, show a snackbar.
onTap: () {
ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
content: Text('Tap'),
));
},
child: const padding(
padding: EdgeInsets.all(12),
child: Text('Flat button'),
),
)
<code_end>
<topic_end>
<topic_start>
interactive example
<code_start>
import 'package:flutter/material.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
widget build(BuildContext context) {
const title = 'inkwell demo';
return const MaterialApp(
title: title,
home: MyHomePage(title: title),
);
}
}
class MyHomePage extends StatelessWidget {
final string title;
const MyHomePage({super.key, required this.title});
@override
widget build(BuildContext context) {
return scaffold(
appBar: AppBar(
title: text(title),
),
body: const center(
child: MyButton(),
),
);
}
}
class MyButton extends StatelessWidget {
const MyButton({super.key});
@override
widget build(BuildContext context) {
// the InkWell wraps the custom flat button widget.
return InkWell(
// when the user taps the button, show a snackbar.
onTap: () {
ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
content: Text('Tap'),
));
},
child: const padding(
padding: EdgeInsets.all(12),
child: Text('Flat button'),
),
);
}
}
<code_end>
<topic_end>
<topic_start>
implement swipe to dismiss