| // 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/stateless_widget_material.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 Hero |
| // |
| //*************************************************************************** |
| //* ▼▼▼▼▼▼▼▼ description ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) |
| |
| // This sample shows a [Hero] used within a [ListTile]. |
| // |
| // Tapping on the Hero-wrapped rectangle triggers a hero |
| // animation as a new [MaterialPageRoute] is pushed. Both the size |
| // and location of the rectangle animates. |
| // |
| // Both widgets use the same [Hero.tag]. |
| // |
| // The Hero widget uses the matching tags to identify and execute this |
| // animation. |
| |
| //* ▲▲▲▲▲▲▲▲ description ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) |
| //*************************************************************************** |
| |
| import 'package:flutter/material.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 MaterialApp( |
| title: _title, |
| home: MyStatelessWidget(), |
| ); |
| } |
| } |
| |
| /// This is the stateless widget that the main application instantiates. |
| class MyStatelessWidget extends StatelessWidget { |
| const MyStatelessWidget({Key? key}) : super(key: key); |
| |
| @override |
| //******************************************************************** |
| //* ▼▼▼▼▼▼▼▼ code ▼▼▼▼▼▼▼▼ (do not modify or remove section marker) |
| |
| Widget build(BuildContext context) { |
| return Column( |
| crossAxisAlignment: CrossAxisAlignment.start, |
| children: <Widget>[ |
| const SizedBox( |
| height: 20.0, |
| ), |
| ListTile( |
| leading: Hero( |
| tag: 'hero-rectangle', |
| child: _blueRectangle(const Size(50, 50)), |
| ), |
| onTap: () => _gotoDetailsPage(context), |
| title: |
| const Text('Tap on the icon to view hero animation transition.'), |
| ), |
| ], |
| ); |
| } |
| |
| Widget _blueRectangle(Size size) { |
| return Container( |
| width: size.width, |
| height: size.height, |
| color: Colors.blue, |
| ); |
| } |
| |
| void _gotoDetailsPage(BuildContext context) { |
| Navigator.of(context).push(MaterialPageRoute<void>( |
| builder: (BuildContext context) => Scaffold( |
| appBar: AppBar( |
| title: const Text('second Page'), |
| ), |
| body: Center( |
| child: Column( |
| mainAxisAlignment: MainAxisAlignment.center, |
| children: <Widget>[ |
| Hero( |
| tag: 'hero-rectangle', |
| child: _blueRectangle(const Size(200, 200)), |
| ), |
| ], |
| ), |
| ), |
| ), |
| )); |
| } |
| |
| //* ▲▲▲▲▲▲▲▲ code ▲▲▲▲▲▲▲▲ (do not modify or remove section marker) |
| //******************************************************************** |
| |
| } |