flutter-go/lib/widgets/elements/Form/CheckBox/Checkbox/index.dart

/// Created with FlutterGo.
/// User: 一晟
/// Date: 2018/11/14
/// Time: 下午4:31
/// email: zhu.yan@alibaba-inc.com
/// target: Checkbox 的示例
/// 对应文档地址:https://docs.flutter.io/flutter/material/Checkbox-class.html

import 'package:flutter/material.dart';

import 'package:flutter_go/components/widget_demo.dart';
import './demo.dart' as checkbox;

const String _checkboxText0 =
"""### **简介**
> checkbox “复选框”
- 复选框本身不保持任何状态;
- 当复选框的状态发生变化时，窗口小部件会调用onChanged回调;
- 大多数使用复选框的小部件将侦听onChanged回调，并使用新值重建复选框以更新复选框的可视外观;""";


const String _checkboxText1 =
"""### **基本用法**
> 下面示例展示多个颜色(随机)样式的 `checkbox`
- 一个多选的 `checkbox`;
""";

const String _checkboxText2 =
"""### **进阶用法**
> 下面示例展示多个颜色(随机)样式的 `checkbox`
- 一个单选 `checkbox` 操作;
""";

class Demo extends StatefulWidget {
  static const String routeName = '/element/Form/CheckBox/Checkbox';

  @override
  _DemoState createState() => _DemoState();
}

class _DemoState extends State<Demo> {
  int selectValue = -1;
  @override
  Widget build(BuildContext context) {
    return WidgetDemo(
      title: 'Checkbox',
      codeUrl: 'elements/Form/CheckBox/Checkbox/demo.dart',
      contentList: allCheckboxs(context,this),
      docUrl: 'https://docs.flutter.io/flutter/material/Checkbox-class.html',
    );
  }
}

 // 所有的 Checkbox 按钮
List allCheckboxs(BuildContext context,_DemoState that){
  return [
    _checkboxText0,
    _checkboxText1,
    Row(
      mainAxisAlignment: MainAxisAlignment.spaceAround,
      mainAxisSize: MainAxisSize.max,
      children: [
        checkbox.CheckboxDefault(that, 0),
        checkbox.CheckboxDefault(that, 1),
        checkbox.CheckboxDefault(that, 2),
        checkbox.CheckboxDefault(that, 3),
        checkbox.CheckboxDefault(that, 4),
      ],
    ),
    _checkboxText2,
    Row(
      mainAxisAlignment: MainAxisAlignment.spaceAround,
      mainAxisSize: MainAxisSize.max,
      children: <Widget>[
        checkbox.CheckboxSelect(context.widget, that, 0),
        checkbox.CheckboxSelect(context.widget, that, 1),
        checkbox.CheckboxSelect(context.widget, that, 2),
        checkbox.CheckboxSelect(context.widget, that, 3),
        checkbox.CheckboxSelect(context.widget, that, 4),
      ],
    ),
    SizedBox(width: 20.0), // 间距
  ];
}