lazy_indexed_stack 0.0.1

A new Flutter package project.

example/lib/main.dart

import 'package:flutter/material.dart';

import 'package:lazy_indexed_stack/lazy_indexed_stack.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class LoadingPage extends StatefulWidget {
  @override
  _LoadingPageState createState() => _LoadingPageState();
}

class _LoadingPageState extends State<LoadingPage> {
  bool loading = true;

  @override
  void initState() {
    Future.delayed(new Duration(seconds: 2)).then((e) {
      setState(() {
        loading = false;
      });
    });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return loading
        ? new Container(
            child: new Text("loading...."),
          )
        : Container(
            child: new Text("load success"),
          );
  }
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  int index = 0;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: new LazyIndexedStack(
        reuse: false,
        index: index,
        itemBuilder: (c, i) {
          return LoadingPage();
        },
        itemCount: 4,
      ),
      bottomNavigationBar: new BottomNavigationBar(
        items: [
          new BottomNavigationBarItem(
              icon: new Icon(
                Icons.add,
                color: Colors.black38,
              ),
              title: new Text("add")),
          new BottomNavigationBarItem(
              icon: new Icon(Icons.add, color: Colors.black38),
              title: new Text("add")),
          new BottomNavigationBarItem(
              icon: new Icon(Icons.add, color: Colors.black38),
              title: new Text("add")),
          new BottomNavigationBarItem(
              icon: new Icon(Icons.add, color: Colors.black38),
              title: new Text("add")),
        ],
        currentIndex: index,
        onTap: (i) {
          setState(() {
            index = i;
          });
        },
      ),
    );
  }
}