forked from lxm_flutter/FlutterUnit
76 lines
1.9 KiB
Dart
76 lines
1.9 KiB
Dart
import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020/7/21
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/// contact me by email 1981462002@qq.com
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/// 说明:
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// {
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// "widgetId": 297,
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// "name": 'IntrinsicWidth基本使用',
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// "priority": 1,
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// "subtitle":
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// "【child】 : 子组件 【Widget】\n"
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// "如示例:上面宽可变动，中间宽固定,下面宽取前两者的最高值。",
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// }
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class IntrinsicWidthDemo extends StatefulWidget {
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@override
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_IntrinsicWidthDemoState createState() => _IntrinsicWidthDemoState();
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}
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class _IntrinsicWidthDemoState extends State<IntrinsicWidthDemo> {
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var _height =120.0;
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@override
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Widget build(BuildContext context) {
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return Container(
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child: Column(
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children: <Widget>[
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buildChild(_height),
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SizedBox(height: 10),
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_buildSlider()
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],
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),
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);
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}
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Widget buildChild(double leftWidth) {
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return IntrinsicWidth(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: <Widget>[
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Container(
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height: 50,
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width: leftWidth,
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color: Colors.yellow,
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alignment: Alignment.center,
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child: Text("width:${leftWidth.toStringAsFixed(1)}"),
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),
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Container(
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color: Colors.blue,
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width: 150,
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height: 60,
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alignment: Alignment.center,
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child: Text("固定宽"),
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),
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Container(
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color: Colors.red,
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height: 40,
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alignment: Alignment.center,
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child: Text("最宽"),
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)
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],
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),
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);
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}
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Widget _buildSlider() =>Slider(
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value: _height,
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max: 200.0,
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min: 80.0,
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divisions: 17,
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onChanged: (v)=> setState(() => _height= v),
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);
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}
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