forked from lxm_flutter/FlutterUnit
75 lines
2.0 KiB
Dart
75 lines
2.0 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: 298 IntrinsicHeight 根据子元素的固有高度调整其子元素大小的组件,可解决很多布局的疑难杂症,但相对昂贵。
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// {
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// "widgetId": 298,
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// "name": 'IntrinsicHeight基本使用',
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// "priority": 1,
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// "subtitle": "【child】 : 子组件 【Widget】\n"
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// "如示例:左侧高可变动，中间高固定,右侧高取前两者的最高值。",
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// }
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class IntrinsicHeightDemo extends StatefulWidget {
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@override
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_IntrinsicHeightDemoState createState() => _IntrinsicHeightDemoState();
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}
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class _IntrinsicHeightDemoState extends State<IntrinsicHeightDemo> {
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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 leftHeight) {
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return IntrinsicHeight(
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child: Row(
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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: leftHeight,
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width: 120,
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color: Colors.yellow,
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alignment: Alignment.center,
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child: Text("height:${leftHeight.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: 80,
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alignment: Alignment.center,
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child: Text("固定高"),
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),
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Container(
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color: Colors.red,
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width: 60,
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alignment: Alignment.center,
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child: Text("最高"),
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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: 30.0,
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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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