forked from lxm_flutter/FlutterUnit
83 lines
2.1 KiB
Dart
83 lines
2.1 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": 81,
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// "name": 'UnConstrainedBox基本使用',
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// "priority": 1,
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// "subtitle": "【child】 : 孩子组件 【Widget】\n"
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// "【constrainedAxis】 : 仍受约束的轴*2 【Axis】\n"
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// "【alignment】 : 对齐方式 【AlignmentGeometry】",
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// }
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class CustomUnConstrainedBox extends StatefulWidget {
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const CustomUnConstrainedBox({Key? key}) : super(key: key);
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@override
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_CustomUnConstrainedBoxState createState() => _CustomUnConstrainedBoxState();
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}
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class _CustomUnConstrainedBoxState extends State<CustomUnConstrainedBox> {
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bool _value = false;
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@override
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Widget build(BuildContext context) {
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return Wrap(
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spacing: 20,
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children: [_buildUnconstrainedBox(), _buildConstrainedAxis()],
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);
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}
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Widget _buildUnconstrainedBox() {
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Widget child = Container(
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color: Colors.cyanAccent,
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width: 60,
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height: 60,
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child: Switch(
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value: _value,
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onChanged: (v) {
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setState(() {
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_value = v;
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});
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},
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),
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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: 150,
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height: 100,
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child: _value
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? UnconstrainedBox(alignment: Alignment.center, child: child)
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: child,
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),
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Text(_value ? "已解除约束" : "子组件受约束")
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],
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);
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}
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Widget _buildConstrainedAxis() {
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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: 150,
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height: 100,
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child: UnconstrainedBox(
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alignment: Alignment.center,
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constrainedAxis: Axis.vertical,
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child: Container(
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color: Colors.cyanAccent,
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width: 60,
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height: 60,
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)),
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),
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const Text("竖直方向仍约束")
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],
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);
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}
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}
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