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 2020-04-19
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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": 80,
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// "name": 'BoxConstraints基本使用',
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// "priority": 1,
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// "subtitle":
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// "【child】 : 孩子组件 【Widget】\n"
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// "【minWidth】 : 最小宽 【double】\n"
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// "【minHeight】 : 最小高 【double】\n"
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// "【maxHeight】 : 最大高 【double】\n"
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// "【maxWidth】 : 最大宽 【double】",
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// }
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class CustomConstrainedBox extends StatefulWidget {
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@override
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_CustomConstrainedBoxState createState() => _CustomConstrainedBoxState();
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}
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class _CustomConstrainedBoxState extends State<CustomConstrainedBox> {
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var _text = '';
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@override
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Widget build(BuildContext context) {
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var child = Container(
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alignment: Alignment.center,
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color: Colors.cyanAccent,
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width: 40,
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height: 40,
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child: Text("Static"),
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);
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var box = ConstrainedBox(
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constraints: BoxConstraints(
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minHeight: 50,
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minWidth: 20,
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maxHeight: 80,
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maxWidth: 150,
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),
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child: Container(color: Colors.orange, child: Text(_text)),
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);
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return Column(
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children: <Widget>[
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Container(
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color: Colors.grey.withAlpha(22),
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width: 300,
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height: 100,
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child: Row(
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children: <Widget>[child, UnconstrainedBox(child: box), child],
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),
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),
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_buildInput(),
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],
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);
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}
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Widget _buildInput() {
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return Padding(
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padding: const EdgeInsets.all(18.0),
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child: TextField(
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decoration: InputDecoration(
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border: OutlineInputBorder(),
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hintText: '请输入',
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),
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onChanged: (v) {
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setState(() {
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_text = v;
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});
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},
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),
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);
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}
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}
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