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wrap_example.dart
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text(widget.title),
),
body: Padding(
padding: const EdgeInsets.all(8.0),
child: Wrap(
spacing: 16,
runSpacing: 16,
children: [
View(
title: "Pteranodon",
),
View(
title: "Cobra",
),
View(
title: "Mountain Gorilla",
),
View(
title: "Giraffe",
),
View(
title: "blue whale",
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
class View extends StatelessWidget {
const View({Key key, this.title}) : super(key: key);
final String title;
@override
Widget build(BuildContext context) {
return Container(
decoration: BoxDecoration(
color: Colors.white,
border: Border.all(color: Colors.black45, width: 1),
borderRadius: BorderRadius.circular(8.0),
),
child: Padding(
padding: const EdgeInsets.all(8.0),
// POINT: IntrinsicWidthをつかう
child: IntrinsicWidth(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Text(title),
Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Icon(Icons.edit),
Icon(Icons.delete),
],
),
],
),
),
),
);
}
}
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