| // Copyright 2014 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Template: dev/snippets/config/templates/stateful_widget_cupertino.tmpl |
| // |
| // Comment lines marked with "▼▼▼" and "▲▲▲" are used for authoring |
| // of samples, and may be ignored if you are just exploring the sample. |
| |
| // Flutter code sample for CupertinoSliverRefreshControl |
| // |
| //*************************************************************************** |
| //* ▼▼▼▼▼▼▼▼ description ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) |
| |
| // When the user scrolls past [refreshTriggerPullDistance], |
| // this sample shows the default iOS pull to refresh indicator for 1 second and |
| // adds a new item to the top of the list view. |
| |
| //* ▲▲▲▲▲▲▲▲ description ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) |
| //*************************************************************************** |
| |
| import 'package:flutter/cupertino.dart'; |
| |
| void main() => runApp(const MyApp()); |
| |
| /// This is the main application widget. |
| class MyApp extends StatelessWidget { |
| const MyApp({Key? key}) : super(key: key); |
| |
| static const String _title = 'Flutter Code Sample'; |
| |
| @override |
| Widget build(BuildContext context) { |
| return const CupertinoApp( |
| title: _title, |
| home: MyStatefulWidget(), |
| ); |
| } |
| } |
| |
| /// This is the stateful widget that the main application instantiates. |
| class MyStatefulWidget extends StatefulWidget { |
| const MyStatefulWidget({Key? key}) : super(key: key); |
| |
| @override |
| State<MyStatefulWidget> createState() => _MyStatefulWidgetState(); |
| } |
| |
| /// This is the private State class that goes with MyStatefulWidget. |
| class _MyStatefulWidgetState extends State<MyStatefulWidget> { |
| //******************************************************************** |
| //* ▼▼▼▼▼▼▼▼ code ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) |
| |
| List<Color> colors = <Color>[ |
| CupertinoColors.systemYellow, |
| CupertinoColors.systemOrange, |
| CupertinoColors.systemPink |
| ]; |
| List<Widget> items = <Widget>[ |
| Container(color: CupertinoColors.systemPink, height: 100.0), |
| Container(color: CupertinoColors.systemOrange, height: 100.0), |
| Container(color: CupertinoColors.systemYellow, height: 100.0), |
| ]; |
| |
| @override |
| Widget build(BuildContext context) { |
| return CupertinoApp( |
| home: CupertinoPageScaffold( |
| child: CustomScrollView( |
| physics: |
| const BouncingScrollPhysics(parent: AlwaysScrollableScrollPhysics()), |
| slivers: <Widget>[ |
| const CupertinoSliverNavigationBar(largeTitle: Text('Scroll down')), |
| CupertinoSliverRefreshControl( |
| refreshTriggerPullDistance: 100.0, |
| refreshIndicatorExtent: 60.0, |
| onRefresh: () async { |
| await Future<void>.delayed(const Duration(milliseconds: 1000)); |
| setState(() { |
| items.insert( |
| 0, Container(color: colors[items.length % 3], height: 100.0)); |
| }); |
| }, |
| ), |
| SliverList( |
| delegate: SliverChildBuilderDelegate( |
| (BuildContext context, int index) => items[index], |
| childCount: items.length, |
| ), |
| ), |
| ], |
| ))); |
| } |
| |
| //* ▲▲▲▲▲▲▲▲ code ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) |
| //******************************************************************** |
| |
| } |