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209 lines
7.1 KiB
Dart
209 lines
7.1 KiB
Dart
/// Created with 菜鸟手册.
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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: RaisedButton 的示例
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/// 对应文档地址:https://docs.flutter.io/flutter/material/RaisedButton-class.html
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import 'package:flutter_markdown/flutter_markdown.dart';
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import 'dart:math';
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import 'package:flutter/material.dart';
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import 'package:flutter_go/components/widget_demo.dart';
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import './demo.dart' as raisedButton;
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const String _raisedText0 =
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"""### **简介**
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> Raised button “凸起按钮”
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- Raised button 基于 a Material widget 窗口widget，按下 button 时，Material.elevation 会增加;
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- 使用 Raised button 可将尺寸添加到大多数平面布局中;
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- 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;
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""";
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const String _raisedText1 =
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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 _raisedText2 =
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"""### **进阶用法1**
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> RaisedButton.icon 的用方法，按钮图标和标签的widget创建文本按钮;""";
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const String _raisedText3 =
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"""### **进阶用法2**
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> 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
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- 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;
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- Raised 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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""";
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class Demo extends StatefulWidget {
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static const String routeName = '/element/Form/Button/RaisedButton';
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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: 'RaisedButton',
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codeUrl: 'elements/Form/Button/RaisedButton/demo.dart',
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contentList: [allRaisedButtons(context,this)],
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docUrl: 'https://docs.flutter.io/flutter/material/RaisedButton-class.html',
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);
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}
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}
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// 所有的 RaisedButton 按钮
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Widget allRaisedButtons(BuildContext context,_DemoState that){
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final ShapeBorder buttonShape = drawShape(that.buttonShapeType);
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return Container(
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//padding: EdgeInsets.only(bottom: 20.0, top: 20.0, left: 0, right: 0),
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child: Column(
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//mainAxisSize: MainAxisSize.max,
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children: <Widget>[
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MarkdownBody(data: _raisedText0),
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textAlignBar(_raisedText1),
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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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raisedButton.RaisedButtonDefault(),
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SizedBox(width: 20.0), // 间距
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raisedButton.RaisedButtonDefault(false),
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],
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),
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textAlignBar(_raisedText2),
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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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raisedButton.RaisedButtonIconDefault(),
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raisedButton.RaisedButtonIconDefault(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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raisedButton.RaisedButtonIconDefault(true, Icons.android),
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raisedButton.RaisedButtonIconDefault(true, Icons.announcement),
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],
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),
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textAlignBar(_raisedText3),
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SizedBox(height: 10.0),
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raisedButton.RaisedButtonCustom('主要按钮',Colors.blue,buttonShape),
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SizedBox(height: 10.0),
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raisedButton.RaisedButtonCustom('成功按钮',Colors.green,buttonShape),
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SizedBox(height: 10.0),
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raisedButton.RaisedButtonCustom('信息按钮',Colors.grey,buttonShape),
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SizedBox(height: 10.0),
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raisedButton.RaisedButtonCustom('警告按钮',Colors.orange,buttonShape),
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SizedBox(height: 10.0),
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raisedButton.RaisedButtonCustom('危险按钮',Colors.pink,buttonShape),
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SizedBox(height: 10.0),
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raisedButton.RaisedButtonCustom( '点击切换，按钮的圆角', 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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}
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// alert 弹框
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// context:容器的父级
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// void _showMessage(String name, BuildContext context) {
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// showDialog(
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// // alert 的父级
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// context: context,
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// builder: (BuildContext context) {
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// return AlertDialog(
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// title: Text('提示'),
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// content: Text(name),
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// actions: <Widget>[
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// FlatButton(
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// // alert 的取消按钮
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// onPressed: () {
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// // 取消的事件
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// Navigator.of(context).pop(true);
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// },
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// child: Text('取消'))
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// ]);
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// }
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// );
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// }
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// 带align的text
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Widget textAlignBar(String txt){
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//style: TextStyle(fontSize: 15.5, height: 1.2),textAlign:TextAlign.left
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return Align(
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alignment: FractionalOffset.centerLeft,
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child: Column(
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children: <Widget>[
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SizedBox(height: 20.0),
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MarkdownBody(data: txt)
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// Text(txt, style: TextStyle(fontSize: 15.5,height: 1.2,color:Colors.blue),textAlign:TextAlign.left)
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])
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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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