class2.dart

import 'package:flutter/material.dart';
import 'package:flutter_classs1/common_item.dart';

//Alice--入口點, 寫法相當於
//void main() {
//  runApp(new MyApp()); //只有一行的話，建議簡化
//}

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    //Alice--MaterialApp是整個App最大的外層，包含很多屬性
    return new MaterialApp(
      home: new Class1Demo(),
    );
  }
}

class Class1Demo extends StatefulWidget {
  bool startup = true;

  @override
  State<Class1Demo> createState() {
    return new _Class1Demo();
  }
}

    abstract class ListItem {}

    // A ListItem that contains data to display a heading
    class HeadingItem implements ListItem {
      final String heading;

      HeadingItem(this.heading);
    }

    // A ListItem that contains data to display a message
    class AppItem implements ListItem {
      final String title;
      final IconData titleIcon;
      bool switchStatus = false;

      AppItem(this.title, this.titleIcon);
    }

    final items = <ListItem>[

        new HeadingItem("Selected Apps"),
        new AppItem('Line', Icons.power_settings_new),
        new AppItem('WeChat', Icons.add ),
        new AppItem('Facebook', Icons.power_settings_new),
        new HeadingItem("Recommand Apps"),
        new AppItem('WhatApp', Icons.power_settings_new),
        new AppItem('IG', Icons.power_settings_new),
        new AppItem('SnapChat', Icons.power_settings_new),
    ];


class _Class1Demo extends State<Class1Demo> {
  //?
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        appBar: new AppBar(
          title: const Text("Demo"),
          backgroundColor: const Color(0xFFF00695C),
        ),
        body:
        new ListView.builder(
          itemCount: items.length,
          itemBuilder: (context, index) {
            final item = items[index];

            if (item is HeadingItem) {
              return new ListTile(
                title: new Text(
                  item.heading,
                  style: Theme.of(context).textTheme.headline,
                ),
              );
            } else if (item is AppItem) {
              return new CommonItem(
                  title: item.title,
                  titleIcon: item.titleIcon,
                  isShowSwitch: item.switchStatus,
                  onTap: () {
                  setState(() {
                    item.switchStatus = !item.switchStatus;
                  });
                  },
              );
            }
          }
  )


//        new Column(
//          children: <Widget>[
//            new SetAppTypeTitle(appTitle: "Selected Apps"),
//            new CommonItem(
//              title: "WeChat",
//              titleIcon: Icons.power_settings_new,
//              isShowSwitch: widget.startup,
//              onTap: () {
//                setState(() {
//                  widget.startup = !widget.startup;
//                  print("Alice_${widget.startup}");
//                });
//              },
//            ),
//            new Divider(height: 1.0, color: Colors.red),
//            //Alice--橫線
//            new CommonItem(
//                title: "Line",
//                titleIcon: Icons.message,
//                isShowSwitch: true
//            ),
//            new SetAppTypeTitle(appTitle: "Recommand Apps"),
//            new CommonItem(
//                title: "Rate Us",
//                titleIcon: Icons.star_border,
//                isShowSwitch: true
//            ),
//            new CommonItem(
//                title: "Messager",
//                titleIcon: Icons.power_settings_new,
//                isShowSwitch: true
//            ),
//           // new SetAppTypeTitle(appTitle: "Other Apps"),
//          ],
//        ));
    );
  }
}