Add:创建 flutter go web 版

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ryan
2019-08-13 20:38:46 +08:00
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/// Created with Android Studio.
/// User: 一晟
/// Date: 2018/11/22
/// Time: 上午12:03
/// email: zhu.yan@alibaba-inc.com
/// target: OutlineButton 的示例
import 'dart:math';
import 'package:flutter_web/material.dart';
// OutlineButton 默认按钮的实例
// isDisabled:是否是禁用isDisabled 默认为true
class OutlineButtonDefault extends StatelessWidget {
final bool isDisabled;
const OutlineButtonDefault([ this.isDisabled = true])
: assert(isDisabled != null),
super();
@override
Widget build(BuildContext context) {
return OutlineButton(
// 文本内容
child: const Text('默认按钮', semanticsLabel: 'FLAT BUTTON 1'),
onPressed: isDisabled ? () {} : null);
}
}
// OutlineButton.icon 默认按钮的实例
// Create a text button from a pair of widgets that serve as the button's icon and label
// isDisabled:是否是禁用
class OutlineButtonIconDefault extends StatelessWidget {
final bool isDisabled;
final IconData icon;
const OutlineButtonIconDefault(
[ this.isDisabled = true, this.icon = Icons.add_circle])
: super();
@override
Widget build(BuildContext context) {
return OutlineButton.icon(
// 文本内容
icon: Icon(icon, size: 25.0, color: _randomColor()),
label: Text('默认按钮', semanticsLabel: 'FLAT BUTTON 2'),
onPressed: isDisabled
? () {
//_showMessage('点击了 FLAT BUTTON ', context);
}
: null);
}
}
// OutlineButton 自定义的实例
class OutlineButtonCustom extends StatelessWidget {
final String txt;
final Color color;
final ShapeBorder shape;
final VoidCallback onPressed;
const OutlineButtonCustom(
[ this.txt = '自定义按钮',
this.color = Colors.blueAccent,
this.shape,
this.onPressed])
: super();
@override
Widget build(BuildContext context) {
final _onPressed = onPressed;
return OutlineButton(
// 文本内容
child: Text(txt, semanticsLabel: 'FLAT BUTTON 2'),
// 边框的颜色,颜色也可以走主题色 Theme.of(context).primaryColor
borderSide: BorderSide(color: _randomColor(),width:Random.secure().nextInt(10).toDouble()),
// 按钮颜色
color: _randomColor(),
// 按钮失效时边框颜色
disabledBorderColor: Colors.red,
highlightedBorderColor:Colors.black54,
// 高亮时的背景色
highlightColor: Colors.yellow,
// 失效时的背景色
//disabledColor: Colors.grey,
// 该按钮上的文字颜色,但是前提是不设置字体自身的颜色时才会起作用
textColor: _randomColor(),
// 按钮失效时的文字颜色,同样的不能使用文本自己的样式或者颜色时才会起作用
disabledTextColor: _randomColor(),
// 按钮主题,主要用于与ButtonTheme和ButtonThemeData一起使用来定义按钮的基色,OutlineButtonOutlineButtonOutlineButton它们是基于环境ButtonTheme配置的
//ButtonTextTheme.accent使用模版颜色的;ButtonTextTheme.normal按钮文本是黑色或白色取决于。ThemeData.brightness;ButtonTextTheme.primary按钮文本基于。ThemeData.primaryColor.
textTheme: ButtonTextTheme.normal,
// 按钮内部,墨汁飞溅的颜色,点击按钮时的渐变背景色,当你不设置高亮背景时才会看的更清楚
splashColor: _randomColor(),
// 抗锯齿能力,抗锯齿等级依次递增,none默认),hardEdge,antiAliasWithSaveLayer,antiAlias
clipBehavior: Clip.antiAlias,
padding: EdgeInsets.only(bottom: 5.0, top: 5.0, left: 30.0, right: 30.0),
//高亮时候的阴影
highlightElevation: 10.0,
shape: shape, // 在Outline 里只能设置圆角,边框用borderSide
// OutlineButton 的点击事件
onPressed: () {
// Perform some action
if (_onPressed is VoidCallback) {
_onPressed();
}
});
}
}
Color _randomColor() {
var red = Random.secure().nextInt(255);
var greed = Random.secure().nextInt(255);
var blue = Random.secure().nextInt(255);
return Color.fromARGB(255, red, greed, blue);
}

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/// Created with FlutterGo.
/// User: 一晟
/// Date: 2018/11/14
/// Time: 下午4:31
/// email: zhu.yan@alibaba-inc.com
/// target: OutlineButton 的示例
/// 对应文档地址:https://docs.flutter.io/flutter/material/OutlineButton-class.html
import 'dart:math';
import 'package:flutter_web/material.dart';
import 'package:flutter_go/components/widget_demo.dart';
import './demo.dart' as outlineButton;
const String _outlineText0 =
"""### **简介**
> Outline button “边框按钮”
- 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
- 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
""";
const String _outlineText1 =
"""### **基本用法**
> 参数的默认的 button 和禁用 button
- 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
- 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""";
const String _outlineText2 =
"""### **进阶用法1**
> OutlineButton.icon 的用法按钮图标和标签的widget创建文本按钮""";
const String _outlineText3 =
"""### **进阶用法2**
> 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;
- Outline buttons 按钮有一个边框,其形状由形状定义 其外观由borderSidedisabledBorderColor 和 highlightedBorderColor 定义;
- 如果您想要 ink-splash 效果,但又不想使用 button ,请考虑直接使用 InkWell
- Outline buttons 的最小尺寸为88.0×36.0,可以用 ButtonTheme 覆盖;
- 通过 shape 属性的设置,改变边框样式和圆角;
- 可以尝试长按按钮button 突出显示;
""";
class Demo extends StatefulWidget {
static const String routeName = '/element/Form/Button/OutlineButton';
@override
_DemoState createState() => _DemoState();
}
class _DemoState extends State<Demo> {
String buttonShapeType = 'border'; // 边框类型
void setButtonShapeType(){
String _buttonShapeType = (buttonShapeType == 'border') ? 'radius' : 'border';
if (mounted) {
this.setState(() {
buttonShapeType = _buttonShapeType;
});
}
}
@override
Widget build(BuildContext context) {
return WidgetDemo(
title: 'OutlineButton',
codeUrl: 'elements/Form/Button/OutlineButton/demo.dart',
contentList: allOutlineButtons(context,this),
docUrl: 'https://docs.flutter.io/flutter/material/OutlineButton-class.html',
);
}
}
// 所有的 OutlineButton 按钮
List allOutlineButtons(BuildContext context,_DemoState that){
final ShapeBorder buttonShape = drawShape(that.buttonShapeType);
return [
_outlineText0,
_outlineText1,
ButtonBar(
alignment: MainAxisAlignment.spaceAround,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
outlineButton.OutlineButtonDefault(),
SizedBox(width: 20.0), // 间距
outlineButton.OutlineButtonDefault(false),
],
),
_outlineText2,
ButtonBar(
alignment: MainAxisAlignment.spaceAround,
//mainAxisSize: MainAxisSize.min,
children: <Widget>[
outlineButton.OutlineButtonIconDefault(),
outlineButton.OutlineButtonIconDefault(false),
],
),
ButtonBar(
alignment: MainAxisAlignment.spaceAround,
//mainAxisSize: MainAxisSize.min,
children: <Widget>[
outlineButton.OutlineButtonIconDefault(true, Icons.android),
outlineButton.OutlineButtonIconDefault(true, Icons.announcement),
],
),
_outlineText3,
SizedBox(height: 10.0),
outlineButton.OutlineButtonCustom('主要按钮', Colors.blue, buttonShape),
SizedBox(height: 10.0),
outlineButton.OutlineButtonCustom('成功按钮', Colors.green, buttonShape),
SizedBox(height: 10.0),
outlineButton.OutlineButtonCustom('信息按钮', Colors.grey, buttonShape),
SizedBox(height: 10.0),
outlineButton.OutlineButtonCustom('警告按钮', Colors.orange, buttonShape),
SizedBox(height: 10.0),
outlineButton.OutlineButtonCustom('危险按钮', Colors.pink, buttonShape),
SizedBox(height: 10.0),
outlineButton.OutlineButtonCustom(
'点击切换,随机改变按钮的圆角,边框样式', Colors.blue, buttonShape,
() => that.setButtonShapeType()),
SizedBox(height: 20.0)
];
}
// 绘制边框信息,比如是否有边框,是否是圆角
ShapeBorder drawShape(String type){
final Color _color = _randomColor();
final borderWidth = Random.secure().nextInt(5).toDouble();
final radiusWidth = Random.secure().nextInt(50).toDouble();
switch(type){
case 'border':
return Border.all(
// 设置边框样式
width: borderWidth,
color: _color,
style: BorderStyle.solid,
);
break;
case 'radius':
return RoundedRectangleBorder(
side: BorderSide( // 保留原来的边框样式
width: borderWidth,
color: _color,
style: BorderStyle.solid,
),
borderRadius: BorderRadius.only(
topRight: Radius.circular(radiusWidth),
topLeft: Radius.circular(radiusWidth),
bottomLeft: Radius.circular(radiusWidth),
bottomRight: Radius.circular(radiusWidth),
),
);
break;
default:
return null;
}
}
// 取随机颜色
Color _randomColor() {
var red = Random.secure().nextInt(255);
var greed = Random.secure().nextInt(255);
var blue = Random.secure().nextInt(255);
return Color.fromARGB(255, red, greed, blue);
}