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lib/13/go/others/push.dart

@@ -0,0 +1,101 @@
+// Copyright 2013 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.
+
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+
+void main() => runApp(App());
+
+/// The main app.
+class App extends StatelessWidget {
+  /// Creates an [App].
+  App({super.key});
+
+  /// The title of the app.
+  static const String title = 'GoRouter Example: Push';
+
+  @override
+  Widget build(BuildContext context) => MaterialApp.router(
+        routerConfig: _router,
+        title: title,
+      );
+
+  late final GoRouter _router = GoRouter(
+    routes: <GoRoute>[
+      GoRoute(
+        path: '/',
+        builder: (BuildContext context, GoRouterState state) =>
+            const Page1ScreenWithPush(),
+      ),
+      GoRoute(
+        path: '/page2',
+        builder: (BuildContext context, GoRouterState state) =>
+            Page2ScreenWithPush(
+          int.parse(state.uri.queryParameters['push-count']!),
+        ),
+      ),
+    ],
+  );
+}
+
+/// The screen of the first page.
+class Page1ScreenWithPush extends StatelessWidget {
+  /// Creates a [Page1ScreenWithPush].
+  const Page1ScreenWithPush({super.key});
+
+  @override
+  Widget build(BuildContext context) => Scaffold(
+        appBar: AppBar(title: const Text('${App.title}: page 1')),
+        body: Center(
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: <Widget>[
+              ElevatedButton(
+                onPressed: () => context.push('/page2?push-count=1'),
+                child: const Text('Push page 2'),
+              ),
+            ],
+          ),
+        ),
+      );
+}
+
+/// The screen of the second page.
+class Page2ScreenWithPush extends StatelessWidget {
+  /// Creates a [Page2ScreenWithPush].
+  const Page2ScreenWithPush(this.pushCount, {super.key});
+
+  /// The push count.
+  final int pushCount;
+
+  @override
+  Widget build(BuildContext context) => Scaffold(
+        appBar: AppBar(
+          title: Text('${App.title}: page 2 w/ push count $pushCount'),
+        ),
+        body: Center(
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: <Widget>[
+              Padding(
+                padding: const EdgeInsets.all(8),
+                child: ElevatedButton(
+                  onPressed: () => context.go('/'),
+                  child: const Text('Go to home page'),
+                ),
+              ),
+              Padding(
+                padding: const EdgeInsets.all(8),
+                child: ElevatedButton(
+                  onPressed: () => context.push(
+                    '/page2?push-count=${pushCount + 1}',
+                  ),
+                  child: const Text('Push page 2 (again)'),
+                ),
+              ),
+            ],
+          ),
+        ),
+      );
+}