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166 lines
5.7 KiB
Dart
166 lines
5.7 KiB
Dart
/// Created with FlutterGo.
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/// User: 一晟
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/// Date: 2018/11/14
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/// Time: 下午4:31
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/// email: zhu.yan@alibaba-inc.com
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/// target: OutlineButton 的示例
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/// 对应文档地址:https://docs.flutter.io/flutter/material/OutlineButton-class.html
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import 'dart:math';
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import 'package:flutter_web/material.dart';
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import 'package:flutter_go/components/widget_demo.dart';
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import './demo.dart' as outlineButton;
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const String _outlineText0 =
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"""### **简介**
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> Outline button “边框按钮”
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- RaisedButton和FlatButton之间的交叉:一个有边框的按钮,当按下按钮时,其高度增加,背景变得不透明;
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- 高程最初为0.0,其背景颜色 为透明。按下按钮时,其背景变为不透明,然后其高程增加到highlightElevation;
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""";
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const String _outlineText1 =
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"""### **基本用法**
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> 参数的默认的 button 和禁用 button
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- 如果onPressed回调为null,则该按钮将被禁用,不会对触摸做出反应,并且将按 disabledColor 属性而不是color属性指定的颜色进行着色;
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- 如果您尝试更改按钮的颜色并且没有任何效果,请检查您是否正在传递非null onPressed处理程序;""";
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const String _outlineText2 =
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"""### **进阶用法1**
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> OutlineButton.icon 的用法,按钮图标和标签的widget创建文本按钮""";
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const String _outlineText3 =
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"""### **进阶用法2**
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> 更改参数的自定义,比如:边框,点击效果,内容文字,颜色,圆角等;
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- Outline buttons 按钮有一个边框,其形状由形状定义 ,其外观由borderSide,disabledBorderColor 和 highlightedBorderColor 定义;
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- 如果您想要 ink-splash 效果,但又不想使用 button ,请考虑直接使用 InkWell;
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- Outline buttons 的最小尺寸为88.0×36.0,可以用 ButtonTheme 覆盖;
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- 通过 shape 属性的设置,改变边框样式和圆角;
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- 可以尝试长按按钮,button 突出显示;
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""";
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class Demo extends StatefulWidget {
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static const String routeName = '/element/Form/Button/OutlineButton';
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@override
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_DemoState createState() => _DemoState();
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}
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class _DemoState extends State<Demo> {
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String buttonShapeType = 'border'; // 边框类型
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void setButtonShapeType(){
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String _buttonShapeType = (buttonShapeType == 'border') ? 'radius' : 'border';
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if (mounted) {
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this.setState(() {
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buttonShapeType = _buttonShapeType;
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});
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}
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}
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@override
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Widget build(BuildContext context) {
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return WidgetDemo(
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title: 'OutlineButton',
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codeUrl: 'elements/Form/Button/OutlineButton/demo.dart',
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contentList: allOutlineButtons(context,this),
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docUrl: 'https://docs.flutter.io/flutter/material/OutlineButton-class.html',
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);
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}
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}
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// 所有的 OutlineButton 按钮
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List allOutlineButtons(BuildContext context,_DemoState that){
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final ShapeBorder buttonShape = drawShape(that.buttonShapeType);
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return [
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_outlineText0,
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_outlineText1,
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ButtonBar(
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alignment: MainAxisAlignment.spaceAround,
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mainAxisSize: MainAxisSize.max,
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children: <Widget>[
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outlineButton.OutlineButtonDefault(),
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SizedBox(width: 20.0), // 间距
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outlineButton.OutlineButtonDefault(false),
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],
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),
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_outlineText2,
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ButtonBar(
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alignment: MainAxisAlignment.spaceAround,
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//mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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outlineButton.OutlineButtonIconDefault(),
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outlineButton.OutlineButtonIconDefault(false),
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],
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),
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ButtonBar(
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alignment: MainAxisAlignment.spaceAround,
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//mainAxisSize: MainAxisSize.min,
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children: <Widget>[
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outlineButton.OutlineButtonIconDefault(true, Icons.android),
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outlineButton.OutlineButtonIconDefault(true, Icons.announcement),
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],
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),
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_outlineText3,
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SizedBox(height: 10.0),
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outlineButton.OutlineButtonCustom('主要按钮', Colors.blue, buttonShape),
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SizedBox(height: 10.0),
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outlineButton.OutlineButtonCustom('成功按钮', Colors.green, buttonShape),
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SizedBox(height: 10.0),
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outlineButton.OutlineButtonCustom('信息按钮', Colors.grey, buttonShape),
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SizedBox(height: 10.0),
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outlineButton.OutlineButtonCustom('警告按钮', Colors.orange, buttonShape),
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SizedBox(height: 10.0),
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outlineButton.OutlineButtonCustom('危险按钮', Colors.pink, buttonShape),
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SizedBox(height: 10.0),
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outlineButton.OutlineButtonCustom(
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'点击切换,随机改变按钮的圆角,边框样式', Colors.blue, buttonShape,
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() => that.setButtonShapeType()),
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SizedBox(height: 20.0)
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];
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}
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// 绘制边框信息,比如是否有边框,是否是圆角
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ShapeBorder drawShape(String type){
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final Color _color = _randomColor();
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final borderWidth = Random.secure().nextInt(5).toDouble();
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final radiusWidth = Random.secure().nextInt(50).toDouble();
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switch(type){
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case 'border':
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return Border.all(
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// 设置边框样式
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width: borderWidth,
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color: _color,
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style: BorderStyle.solid,
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);
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break;
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case 'radius':
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return RoundedRectangleBorder(
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side: BorderSide( // 保留原来的边框样式
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width: borderWidth,
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color: _color,
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style: BorderStyle.solid,
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),
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borderRadius: BorderRadius.only(
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topRight: Radius.circular(radiusWidth),
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topLeft: Radius.circular(radiusWidth),
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bottomLeft: Radius.circular(radiusWidth),
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bottomRight: Radius.circular(radiusWidth),
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),
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);
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break;
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default:
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return null;
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}
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}
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// 取随机颜色
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Color _randomColor() {
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var red = Random.secure().nextInt(255);
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var greed = Random.secure().nextInt(255);
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var blue = Random.secure().nextInt(255);
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return Color.fromARGB(255, red, greed, blue);
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}
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