forked from lxm_flutter/FlutterUnit
94 lines
3.1 KiB
Dart
94 lines
3.1 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter_unit/app/utils/color_utils.dart';
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// {
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// "widgetId": 101,
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// "name": 'RichText基本使用',
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// "priority": 1,
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// "subtitle":
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// "【text】 : 文字 【TextSpan】\n"
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// " 其他属性与Text相同,详见之。",
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// }
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class CustomRichText extends StatelessWidget {
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final str = " 发光强度简称光强，国际单位是（坎德拉）简写cd。"
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"1cd是指光源在指定方向的单位立体角内发出的光通量。"
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"光源辐射是均匀时，则光强为I=F/Ω，Ω为立体角，单位为球面度（sr）,F为光通量，"
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"单位是流明，对于点光源由I=F/4π 。光亮度是表示发光面明亮程度的，"
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"指发光表面在指定方向的发光强度与垂直且指定方向的发光面的面积之比，"
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"单位是坎德拉/平方米。对于一个漫散射面，尽管各个方向的光强和光通量不同，"
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"但各个方向的亮度都是相等的。电视机的荧光屏就是近似于这样的漫散射面，"
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"所以从各个方向上观看图像，都有相同的亮度感。";
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@override
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Widget build(BuildContext context) {
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return Padding(
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padding: const EdgeInsets.only(
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left: 10.0,
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right: 10,
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),
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child: RichText(
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text: TextSpan(
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children: str
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.split("")
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.map((str) => TextSpan(
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text: str,
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style: TextStyle(
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fontSize: 14, color: ColorUtils.randomColor())))
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.toList())),
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);
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}
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}
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// {
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// "widgetId": 101,
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// "name": 'RichText包含其他组件',
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// "priority": 2,
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// "subtitle":
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// "使用WidgetSpan来承载普通组件，作为RichText的内容",
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// }
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class RichTextWithWidget extends StatelessWidget {
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@override
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Widget build(BuildContext context) {
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return RichText(
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text: TextSpan(
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text: 'hello ',
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style: TextStyle(color: Colors.black, fontSize: 18),
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children: <InlineSpan>[
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WidgetSpan(
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child: Image.asset(
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'assets/images/icon_head.png',
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width: 30,
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),
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alignment: PlaceholderAlignment.baseline,
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baseline: TextBaseline.ideographic),
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TextSpan(
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text: ' , welcome to ',
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style: TextStyle(color: Colors.blue, fontSize: 18),
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),
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WidgetSpan(
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child: FlutterLogo(),
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alignment: PlaceholderAlignment.baseline,
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baseline: TextBaseline.ideographic),
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TextSpan(
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text: ' .\n',
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),
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TextSpan(
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text: 'focus me on ',
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style: TextStyle(color: Colors.orange, fontSize: 16),
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),
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TextSpan(
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text: 'https://github.com/toly1994328',
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style: TextStyle(
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color: Colors.blue,
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fontSize: 18,
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decoration: TextDecoration.underline),
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),
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TextSpan(
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text: ' .\n',
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),
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],
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),
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);
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}
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}
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