forked from lxm_flutter/FlutterUnit
66 lines
1.7 KiB
Dart
66 lines
1.7 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": 82,
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// "name": 'FractionallySizedBox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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// "【widthFactor】 : 宽分率 【double】\n"
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// "【heightFactor】 : 高分率 【double】\n"
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// "【alignment】 : 对齐方式 【AlignmentGeometry】",
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// }
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class CustomFractionallySizedBox extends StatefulWidget {
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@override
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_CustomFractionallySizedBoxState createState() =>
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_CustomFractionallySizedBoxState();
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}
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class _CustomFractionallySizedBoxState
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extends State<CustomFractionallySizedBox> {
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var _hf = 0.5;
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var _wf = 0.4;
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@override
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Widget build(BuildContext context) {
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var box = FractionallySizedBox(
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widthFactor: _wf,
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heightFactor: _hf,
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alignment: Alignment.center,
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child: Container(color: Colors.orange),
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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: 200,
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height: 100,
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child: box),
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_buildSlider()
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],
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);
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}
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Widget _buildSlider() => Column(
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children: <Widget>[
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Slider(
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divisions: 20,
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min: 0.0,
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max: 2,
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label: '宽分率:' + _wf.toStringAsFixed(1),
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value: _wf,
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onChanged: (v) => setState(() => _wf = v)),
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Slider(
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divisions: 20,
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min: 0.0,
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max: 2,
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label: '高分率:' + _hf.toStringAsFixed(1),
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value: _hf,
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onChanged: (v) => setState(() => _hf = v)),
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],
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);
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}
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