forked from lxm_flutter/FlutterUnit
97 lines
2.5 KiB
Dart
97 lines
2.5 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": 87,
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// "name": 'FittedBox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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// "【fit】 : 适应模式 【BoxFit】\n"
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// "【alignment】 : 对齐方式 【AlignmentGeometry】",
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// }
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class CustomFittedBox extends StatefulWidget {
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const CustomFittedBox({Key? key}) : super(key: key);
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@override
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_CustomFittedBoxState createState() => _CustomFittedBoxState();
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}
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class _CustomFittedBoxState extends State<CustomFittedBox> {
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double _childW = 20;
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double _childH = 30;
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final List<int> rainbow = const [
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0xffff0000,
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0xffFF7F00,
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0xffFFFF00,
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0xff00FF00,
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0xff00FFFF,
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0xff0000FF,
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0xff8B00FF
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];
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@override
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Widget build(BuildContext context) {
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return Column(
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children: <Widget>[
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Wrap(
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spacing: 10,
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runSpacing: 10,
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children: BoxFit.values
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.map((mode) => Column(
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children: [
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_buildChild(mode),
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const SizedBox(height: 10),
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Text(mode.toString().split('.')[1])
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],
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))
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.toList()),
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_buildSlider()
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],
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);
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}
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Widget _buildChild(BoxFit m) {
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return Container(
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color: Colors.grey.withAlpha(44),
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width: 80,
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height: 60,
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child: FittedBox(
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fit: m,
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child: Container(
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width: _childW,
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height: _childH,
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decoration: BoxDecoration(
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//添加渐变色
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gradient: LinearGradient(
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stops: const[0.0, 1 / 6, 2 / 6, 3 / 6, 4 / 6, 5 / 6, 1.0],
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colors: rainbow.map((e) => Color(e)).toList()),
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),
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),
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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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min: 10,
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max: 150,
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divisions: 100,
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label: '子宽度:' + _childW.toStringAsFixed(1),
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value: _childW,
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onChanged: (v) => setState(() => _childW = v)),
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Slider(
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min: 10,
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max: 150,
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divisions: 100,
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label: '子高度:' + _childH.toStringAsFixed(1),
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value: _childH,
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onChanged: (v) => setState(() => _childH = v)),
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],
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);
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}
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