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layout_builder.dart
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layout_builder.dart
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import 'package:flutter/material.dart';
import 'package:flutter_widget_guide/utils.dart';
import '../Code.dart';
import '../CodeScreen.dart';
class LayoutBuilderWidget extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: Text(
'LayoutBuilder Widget',
style: TextStyle(
fontSize: 20.0,
fontWeight: FontWeight.bold,
fontFamily: Utils.ubuntuRegularFont),
),
actions: <Widget>[
IconButton(
icon: Icon(Icons.code),
onPressed: () => Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CodeScreen(code: Code.layoutBuilderCode),
),
),
)
],
),
body: Center(
child: LayoutBuilder(
builder: (context, constraints) {
if (constraints.maxWidth < 600) {
return Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(
child: Container(color: Colors.lightBlue),
flex: 1,
),
Expanded(
child: Container(color: Colors.indigo),
flex: 1,
)
],
);
} else {
return Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Expanded(
child: Container(color: Colors.lightBlue),
flex: 1,
),
Expanded(
child: Container(color: Colors.indigo),
flex: 1,
),
Expanded(
child: Container(color: Colors.pink),
flex: 1,
),
Expanded(
child: Container(color: Colors.blue),
flex: 1,
)
],
);
}
},
),
),
);
}
}