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import 'package:flutter/material.dart'; | |
void main() { | |
runApp(MainApp()); | |
} | |
class MainApp extends StatelessWidget { | |
final RouterDelegate<AppState> _routerDelegate = MainRouterDelegate(); | |
MainApp({super.key}); | |
@override | |
Widget build(BuildContext context) => | |
MaterialApp.router( | |
routerDelegate: _routerDelegate, | |
backButtonDispatcher: RootBackButtonDispatcher(), | |
); | |
} | |
class MainRouterDelegate extends RouterDelegate<AppState> | |
with ChangeNotifier, PopNavigatorRouterDelegateMixin<AppState> { | |
@override | |
final GlobalKey<NavigatorState> navigatorKey; | |
MainRouterDelegate() : navigatorKey = GlobalKey<NavigatorState>(); | |
final AppState appState = AppState(); | |
@override | |
Widget build(BuildContext context) => Navigator( | |
key: navigatorKey, | |
pages: [ | |
MaterialPage( | |
child: MainScreen( | |
key: const ValueKey("mainScreen"), | |
text: "My Page", | |
appState: appState, | |
) | |
), | |
const MaterialPage(child: InnerScreen(text: "Inner screen")) | |
], | |
onPopPage: (route, result) { | |
print('MainRouter#onPopPage'); | |
if (!route.didPop(result)) { | |
return false; | |
} | |
return true; | |
}, | |
); | |
@override | |
Future<void> setNewRoutePath(AppState configuration) async { | |
} | |
} | |
class MainScreen extends StatefulWidget { | |
MainScreen({super.key, required this.text, required this.appState}): _innerRouterDelegate = InnerRouterDelegate(); | |
final String text; | |
final AppState appState; | |
final RouterDelegate<AppState> _innerRouterDelegate; | |
@override | |
State<MainScreen> createState() => _MainScreenState(); | |
} | |
class _MainScreenState extends State<MainScreen> { | |
@override | |
Widget build(BuildContext context) => Scaffold( | |
body: Router( | |
routerDelegate: widget._innerRouterDelegate, | |
), | |
); | |
} | |
class InnerRouterDelegate extends RouterDelegate<AppState> | |
with ChangeNotifier, PopNavigatorRouterDelegateMixin<AppState> { | |
@override | |
final GlobalKey<NavigatorState> navigatorKey; | |
InnerRouterDelegate() : navigatorKey = GlobalKey<NavigatorState>(); | |
@override | |
Widget build(BuildContext context) => Navigator( | |
key: navigatorKey, | |
pages: const [ | |
MaterialPage( | |
child: InnerScreen( | |
key: ValueKey("innerScreen"), | |
text: "Main screen", | |
) | |
), | |
], | |
onPopPage: (route, result) { | |
print('InnerRouter#onPopPage'); | |
if (!route.didPop(result)) { | |
return false; | |
} | |
return true; | |
}, | |
); | |
@override | |
Future<void> setNewRoutePath(AppState configuration) async { | |
} | |
} | |
class AppState extends ChangeNotifier { | |
} | |
class InnerScreen extends StatelessWidget { | |
const InnerScreen({super.key, required this.text}); | |
final String text; | |
@override | |
Widget build(BuildContext context) { | |
return Scaffold( | |
appBar: AppBar(), | |
body: Center( | |
child: Column( | |
children: [ | |
Text(text), | |
], | |
), | |
), | |
); | |
} | |
} |
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