forked from lxm_flutter/FlutterUnit
68 lines
1.8 KiB
Dart
68 lines
1.8 KiB
Dart
import 'package:flutter/material.dart';
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/// create by 张风捷特烈 on 2020-03-30
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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": 181,
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// "name": 'DropDownButtonHideUnderline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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// }
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class CustomDropDownButtonHideUnderline extends StatefulWidget {
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const CustomDropDownButtonHideUnderline({Key? key}) : super(key: key);
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@override
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_CustomDropDownButtonHideUnderlineState createState() =>
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_CustomDropDownButtonHideUnderlineState();
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}
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class _CustomDropDownButtonHideUnderlineState
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extends State<CustomDropDownButtonHideUnderline> {
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Color _color = Colors.red;
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final List<Color> _colors = const[
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Colors.red,
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Colors.yellow,
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Colors.blue,
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Colors.green
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];
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final List<String> _info = const["红色", "黄色", "蓝色", "绿色"];
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@override
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Widget build(BuildContext context) {
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return Wrap(
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children: [
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Container(
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margin: const EdgeInsets.symmetric(horizontal: 20),
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width: 50,
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height: 50,
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color: _color,
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),
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DropdownButtonHideUnderline(
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child: DropdownButton<Color>(
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value: _color,
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elevation: 1,
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icon: Icon(
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Icons.expand_more,
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size: 20,
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color: _color,
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),
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items: _buildItems(),
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onChanged: (Color? color) =>
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setState(() => _color = color ?? _color)),
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),
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],
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);
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}
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List<DropdownMenuItem<Color>> _buildItems() => _colors
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.map((e) => DropdownMenuItem<Color>(
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value: e,
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child: Text(
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_info[_colors.indexOf(e)],
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style: TextStyle(color: e),
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)))
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.toList();
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}
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