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media_query.dart
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// Copyright 2013 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 'dart:async';
import 'package:flutter/material.dart';
import 'diagram_step.dart';
class MediaQueryDiagram extends StatefulWidget with DiagramMetadata {
const MediaQueryDiagram({super.key, required this.name});
@override
final String name;
@override
State<MediaQueryDiagram> createState() => _MediaQueryDiagramState();
}
class _MediaQueryDiagramState extends State<MediaQueryDiagram> {
@override
Widget build(BuildContext context) {
return ConstrainedBox(
key: UniqueKey(),
constraints: BoxConstraints.tight(const Size(500.0, 300.0)),
child: Theme(
data: ThemeData(primarySwatch: Colors.blue),
child: Material(
color: const Color(0xFFFFFFFF),
child: MediaQuery(
data: const MediaQueryData(),
child: Center(
child: Stack(
alignment: Alignment.topCenter,
children: <Widget>[
Container(width: 350.0, height: 250.0, color: Colors.black),
Container(width: 342.0, height: 246.0, color: Colors.red),
Padding(
padding: const EdgeInsets.only(bottom: 130.0),
child: Container(
width: 342.0,
height: 246.0,
color: Colors.amber,
),
),
Padding(
padding: const EdgeInsets.only(bottom: 200.0),
child: Container(
width: 342.0,
height: 246.0,
color: Colors.white,
),
),
Padding(
padding: const EdgeInsets.fromLTRB(0.0, 170, 240.0, 0.0),
child: Container(
width: 6.0,
height: 80.0,
color: Colors.black45,
),
),
const Padding(
padding: EdgeInsets.fromLTRB(0.0, 260, 240.0, 0.0),
child: Text('viewInsets', style: TextStyle(fontSize: 20.0)),
),
Padding(
padding: const EdgeInsets.fromLTRB(0.0, 100, 0.0, 0.0),
child: Container(
width: 6.0,
height: 70.0,
color: Colors.black45,
),
),
const Padding(
padding: EdgeInsets.fromLTRB(0.0, 70, 0.0, 0.0),
child: Text('padding', style: TextStyle(fontSize: 20.0)),
),
Padding(
padding: const EdgeInsets.fromLTRB(240.0, 100.0, 0.0, .0),
child: Container(
width: 6.0,
height: 150.0,
color: Colors.black45,
),
),
const Padding(
padding: EdgeInsets.fromLTRB(240.0, 260.0, 0.0, 0.0),
child: Text(
'viewPadding',
style: TextStyle(fontSize: 20.0),
),
),
],
),
),
),
),
),
);
}
}
class MediaQueryDiagramStep extends DiagramStep {
@override
final String category = 'widgets';
@override
Future<List<MediaQueryDiagram>> get diagrams async => <MediaQueryDiagram>[
const MediaQueryDiagram(name: 'media_query'),
];
}