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64 lines
1.7 KiB
Dart
64 lines
1.7 KiB
Dart
/*
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* @Author: xiaojia.dxj
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* @Date: 2019-01-08 15:56:26
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* @Last Modified by: xiaojia.dxj
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* @Last Modified time: 2019-01-08 15:56:26
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*/
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import 'package:flutter/material.dart';
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import '../../../../../common/widget_demo.dart';
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import './demo.dart' as sizeBox;
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const String _Text = '''
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### **简介**
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> BoxConstraints为抽象类，我们可以使用BoxConstraints,一个不可边的约束布局，renderBox布局
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- 一个尺寸尊重一个BoxConstraints，当且仅当，以下关系式的成立：
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minWidth <= Size.width <= maxWidth
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minHeight <= Size.height <= maxHeight
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约束本身必须满足这些关系：
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0.0 <= minWidth <= maxWidth <= double.infinity
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0.0 <= minHeight <= maxHeight <= double.infinity
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double.infinity是每个约束的合法值。
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''';
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class Demo extends StatefulWidget {
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static const String routeName = '/element/Frame/Box/RenderBox';
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_DemoState createState() => _DemoState();
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}
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class _DemoState extends State<Demo> {
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@override
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Widget build(BuildContext context) {
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return WidgetDemo(
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title: 'Table',
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codeUrl: 'elements/Frame/Box/RenderBox/demo.dart',
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contentList: [
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_Text,
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_SizeBoxCreate(),
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],
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docUrl: 'https://docs.flutter.io/flutter/widgets/RenderBox-class.html',
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);
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}
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Column _SizeBoxCreate() {
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return new Column(
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children: <Widget>[
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/**
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* Immutable layout constraints for RenderBox layout.
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*/
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SizedBox(
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width: 900.0,
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height: 50.0,
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child: const Card(
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child: Text(
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'SizedBox',
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textAlign: TextAlign.center,
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),
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color: Color(0xFFEF5350)),
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),
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],
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);
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}
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}
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