[Sheet] PopScope - fix onPopInvoked usage in preventPop

sheet/example/lib/examples/route/navigation/go_router_pop_scope.dart

@@ -0,0 +1,101 @@
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:sheet/route.dart';
+
+class GoRouterPopScopeApp extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp.router(
+      title: 'PopScope Example',
+      routerConfig: _router,
+      theme: ThemeData.light(),
+    );
+  }
+
+  final GoRouter _router = GoRouter(
+    routes: [
+      GoRoute(
+        path: '/',
+        builder: (_, __) => HomeScreen(),
+        routes: [
+          GoRoute(
+            path: 'detail',
+            pageBuilder: (_, __) => SheetPage(child: DetailScreen()),
+          ),
+        ],
+      ),
+    ],
+  );
+}
+
+class HomeScreen extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: CupertinoNavigationBar(
+        leading: BackButton(onPressed: () => Navigator.of(context, rootNavigator: true).pop()),
+        middle: Text('Home')
+      ),
+      body: Center(
+        child: ElevatedButton(
+          onPressed: () => context.go('/detail'),
+          child: Text('Open Sheet'),
+        ),
+      ),
+    );
+  }
+}
+
+class DetailScreen extends StatefulWidget {
+  @override
+  State<DetailScreen> createState() => _DetailScreenState();
+}
+
+class _DetailScreenState extends State<DetailScreen> {
+  bool canPop = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return PopScope(
+      canPop: canPop,
+      onPopInvokedWithResult: (didPop, result) async {
+        if (didPop) return;
+        if (await _confirmExit(context)) Navigator.pop(context, result);
+      },
+      child: Scaffold(
+        appBar: CupertinoNavigationBar(middle: Text('Detail')),
+        body: Center(
+          child: Row(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              Text("canPop"),
+              Switch(value: canPop, onChanged: (value) => setState(() => canPop = value)),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  Future<bool> _confirmExit(BuildContext context) async {
+    return await showCupertinoModalPopup(
+          context: context,
+          builder: (context) => CupertinoActionSheet(
+            title: Text('Should Close?'),
+            actions: [
+              CupertinoActionSheetAction(
+                isDestructiveAction: true,
+                onPressed: () => Navigator.pop(context, true),
+                child: Text('OK'),
+              ),
+              CupertinoActionSheetAction(
+                onPressed: () => Navigator.pop(context, false),
+                child: Text('Cancel'),
+              ),
+            ],
+          ),
+        ) ??
+        false;
+  }
+}

sheet/example/lib/route_example_page.dart

@@ -20,6 +20,7 @@ import 'package:sheet/sheet.dart';
 import 'examples/route/examples/modal_with_nested_scroll.dart';
 import 'examples/route/navigation/go_router.dart';
 import 'examples/route/navigation/go_router_advanced.dart';
+import 'examples/route/navigation/go_router_pop_scope.dart';
 
 class RouteExamplePage extends StatelessWidget {
   const RouteExamplePage({super.key});
@@ -95,6 +96,16 @@ class RouteExamplePage extends StatelessWidget {
                         ),
                       ),
                     ),
+                    ListTile(
+                      title: const Text('Go router - PopScope'),
+                      onTap: () => Navigator.of(context).push(
+                        MaterialExtendedPageRoute<void>(
+                          fullscreenDialog: true,
+                          builder: (BuildContext context) =>
+                              GoRouterPopScopeApp(),
+                        ),
+                      ),
+                    ),
                     const SectionTitle('STYLES'),
                     ListTile(
                       title: const Text('Material fit'),

sheet/lib/src/route/sheet_route.dart

@@ -469,7 +469,8 @@ class __SheetRouteContainerState extends State<_SheetRouteContainer>
     );
     if (route.popDisposition == RoutePopDisposition.doNotPop) {
       _sheetController.position.stopPreventingDrag();
-      route.onPopInvoked(false);
+      _firstAnimation = true;
+      route.onPopInvokedWithResult(false, null);
     } else {
       route.willPop().then(
         (RoutePopDisposition disposition) {