forked from lxm_flutter/FlutterUnit
47 lines
1.3 KiB
Dart
47 lines
1.3 KiB
Dart
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import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020-03-29
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/// contact me by email 1981462002@qq.com
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/// 说明:
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/// create by 张风捷特烈 on 2020-03-29
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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": 39,
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// "name": 'Checkbox的三态',
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// "priority": 2,
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// "subtitle":
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// "【tristate】 : 是否是三态 【double】\n"
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// " onChanged时,回调true、null、false三种状态"
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// }
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class TristateCheckBok extends StatefulWidget {
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const TristateCheckBok({Key? key}) : super(key: key);
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@override
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_TristateCheckBokState createState() => _TristateCheckBokState();
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}
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class _TristateCheckBokState extends State<TristateCheckBok> {
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bool _checked = false;
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final colors = [Colors.red, Colors.yellow, Colors.blue, Colors.green];
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@override
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Widget build(BuildContext context) {
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return Wrap(
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spacing: 10,
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children: colors
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.map((e) =>
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Checkbox(
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value: _checked,
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tristate: true,
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checkColor: Colors.white,
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activeColor: e,
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onChanged: (bool? value) {
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print(value);
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setState(() => _checked = value??false);
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}))
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.toList(),
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);
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}
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}
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