Add:创建 flutter go web 版

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ryan
2019-08-13 20:35:36 +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: RaisedButton 的示例
import 'dart:math';
import 'package:flutter/material.dart';
// RaisedButton 默认按钮的实例
// isDisabled:是否是禁用isDisabled 默认为true
class RaisedButtonDefault extends StatelessWidget {
final bool isDisabled;
const RaisedButtonDefault([ this.isDisabled = true])
: assert(isDisabled != null),
super();
@override
Widget build(BuildContext context) {
return RaisedButton(
// 文本内容
child: const Text('默认按钮', semanticsLabel: 'FLAT BUTTON 1'),
onPressed: isDisabled ? () {} : null);
}
}
// RaisedButton.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 RaisedButtonIconDefault extends StatelessWidget {
final bool isDisabled;
final IconData icon;
const RaisedButtonIconDefault(
[ this.isDisabled = true, this.icon = Icons.add_circle])
: super();
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);
}
@override
Widget build(BuildContext context) {
return RaisedButton.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);
}
}
// RaisedButton 自定义的实例
class RaisedButtonCustom extends StatelessWidget {
final String txt;
final Color color;
final ShapeBorder shape;
final VoidCallback onPressed;
const RaisedButtonCustom(
[ 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 RaisedButton(
// 文本内容
child: Text(txt, semanticsLabel: 'FLAT BUTTON 2'),
// 按钮颜色
color: color,
// 按钮亮度
colorBrightness: Brightness.dark,
// 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: Colors.white,
// 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: Colors.grey,
// 按钮主题,主要用于与ButtonTheme和ButtonThemeData一起使用来定义按钮的基色,RaisedButtonRaisedButtonOutlineButton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: Colors.deepPurple,
// 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),
shape: (shape is ShapeBorder)
? shape
: Border.all(
// 设置边框样式
color: Colors.grey,
width: 2.0,
style: BorderStyle.solid,
),
// RaisedButton 的点击事件
onPressed: () {
// Perform some action
if (_onPressed is VoidCallback) {
_onPressed();
}
},
// 改变高亮颜色回掉函数,一个按钮会触发两次,按下后改变时触发一次,松手后恢复原始颜色触发一次
// 参数 bool按下后true恢复false
onHighlightChanged: (isClick) {
print(isClick);
});
}
}

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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: RaisedButton 的示例
/// 对应文档地址:https://docs.flutter.io/flutter/material/RaisedButton-class.html
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutter_go/components/widget_demo.dart';
import './demo.dart' as raisedButton;
const String _raisedText0 =
"""### **简介**
> Raised button “凸起按钮”
- Raised button 基于 a Material widget 窗口widget按下 button 时Material.elevation 会增加;
- 使用 Raised button 可将尺寸添加到大多数平面布局中;
- 例如在复杂的内容列表中,或在宽阔的空间中。避免在已经提出的内容(例如对话框或卡片)上使用 Raised button;
""";
const String _raisedText1 =
"""### **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 _raisedText2 =
"""### **进阶用法1**
> RaisedButton.icon 的用方法按钮图标和标签的widget创建文本按钮;""";
const String _raisedText3 =
"""### **进阶用法2**
> 更改项参数的自定义,比如:边框,点击效果,内容文字,颜色,圆角等
- 如果您想要 ink-splash 的墨水效果但又不想使用按钮请考虑直接使用InkWell;
- Raised 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;
""";
class Demo extends StatefulWidget {
static const String routeName = '/element/Form/Button/RaisedButton';
@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: 'RaisedButton',
codeUrl: 'elements/Form/Button/RaisedButton/demo.dart',
contentList: allRaisedButtons(context, this),
docUrl: 'https://docs.flutter.io/flutter/material/RaisedButton-class.html',
);
}
}
// 所有的 RaisedButton 按钮
List allRaisedButtons(BuildContext context,_DemoState that){
final ShapeBorder buttonShape = drawShape(that.buttonShapeType);
return [
_raisedText0,
_raisedText1,
ButtonBar(
alignment: MainAxisAlignment.spaceAround,
mainAxisSize: MainAxisSize.max,
children: <Widget>[
raisedButton.RaisedButtonDefault(),
SizedBox(width: 20.0), // 间距
raisedButton.RaisedButtonDefault(false),
],
),
_raisedText2,
ButtonBar(
alignment: MainAxisAlignment.spaceAround,
//mainAxisSize: MainAxisSize.min,
children: <Widget>[
raisedButton.RaisedButtonIconDefault(),
raisedButton.RaisedButtonIconDefault(false),
],
),
ButtonBar(
alignment: MainAxisAlignment.spaceAround,
//mainAxisSize: MainAxisSize.min,
children: <Widget>[
raisedButton.RaisedButtonIconDefault(true, Icons.android),
raisedButton.RaisedButtonIconDefault(true, Icons.announcement),
],
),
_raisedText3,
SizedBox(height: 10.0),
raisedButton.RaisedButtonCustom('主要按钮', Colors.blue, buttonShape),
SizedBox(height: 10.0),
raisedButton.RaisedButtonCustom('成功按钮', Colors.green, buttonShape),
SizedBox(height: 10.0),
raisedButton.RaisedButtonCustom('信息按钮', Colors.grey, buttonShape),
SizedBox(height: 10.0),
raisedButton.RaisedButtonCustom('警告按钮', Colors.orange, buttonShape),
SizedBox(height: 10.0),
raisedButton.RaisedButtonCustom('危险按钮', Colors.pink, buttonShape),
SizedBox(height: 10.0),
raisedButton.RaisedButtonCustom('点击切换,按钮的圆角', 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);
}