Simplify example

example/lib/content_page.dart

@@ -7,50 +7,42 @@ class ContentPage extends StatefulWidget {
   const ContentPage({
     Key? key,
     required this.backgroundColor,
-    required this.stream,
+    required this.isOnScreen,
   }) : super(key: key);
 
   final Color backgroundColor;
-  final Stream<ScrollsToTopEvent> stream;
+  final bool isOnScreen;
 
   @override
   State<ContentPage> createState() => _ContentPageState();
 }
 
 class _ContentPageState extends State<ContentPage> {
   final _scrollController = ScrollController();
-  StreamSubscription? _subscription;
-
-  @override
-  void initState() {
-    super.initState();
-    _subscription = widget.stream.listen(_onScrollsToTop);
-  }
 
   @override
   void dispose() {
     _scrollController.dispose();
-    _subscription?.cancel();
     super.dispose();
   }
 
   @override
   Widget build(BuildContext context) {
-    return PrimaryScrollController(
-      controller: _scrollController,
-      child: Scaffold(
-        primary: true,
-        body: _list(),
-        backgroundColor: widget.backgroundColor,
-      ),
+    return Scaffold(
+      primary: true,
+      body: _list(),
+      backgroundColor: widget.backgroundColor,
     );
   }
 
   Widget _list() {
-    return ListView.builder(
-      itemBuilder: _itemBuilder,
-      itemCount: 100,
-      controller: _scrollController,
+    return ScrollsToTop(
+      onScrollsToTop: _onScrollsToTop,
+      child: ListView.builder(
+        itemBuilder: _itemBuilder,
+        itemCount: 100,
+        controller: _scrollController,
+      ),
     );
   }
 
@@ -63,6 +55,8 @@ class _ContentPageState extends State<ContentPage> {
   }
 
   Future<void> _onScrollsToTop(ScrollsToTopEvent event) async {
+    if (!widget.isOnScreen) return;
+
     debugPrint('Scroll to top!');
     _scrollController.animateTo(
       event.to,

example/lib/home_page.dart

@@ -1,7 +1,5 @@
 import 'package:example/content_page.dart';
 import 'package:flutter/material.dart';
-import 'package:rxdart/rxdart.dart';
-import 'package:scrolls_to_top/scrolls_to_top.dart';
 
 class HomePage extends StatefulWidget {
   const HomePage({Key? key}) : super(key: key);
@@ -11,61 +9,41 @@ class HomePage extends StatefulWidget {
 }
 
 class _HomePageState extends State<HomePage> {
-  final List<PublishSubject<ScrollsToTopEvent>> _streams = [
-    PublishSubject<ScrollsToTopEvent>(),
-    PublishSubject<ScrollsToTopEvent>(),
-    PublishSubject<ScrollsToTopEvent>(),
-  ];
   int _currentIndex = 0;
 
-  @override
-  void dispose() {
-    for (var it in _streams) {
-      it.close();
-    }
-    super.dispose();
-  }
-
   @override
   Widget build(BuildContext context) {
-    return ScrollsToTop(
-      onScrollsToTop: _onScrollsToTop,
-      scaffold: Scaffold(
-        appBar: AppBar(title: const Text('Scroll to top')),
-        body: IndexedStack(
-          index: _currentIndex,
-          children: [
-            ContentPage(
-              backgroundColor: Colors.white,
-              stream: _streams[0],
-            ),
-            ContentPage(
-              backgroundColor: Colors.deepOrange,
-              stream: _streams[1],
-            ),
-            ContentPage(
-              backgroundColor: Colors.green,
-              stream: _streams[2],
-            ),
-          ],
-        ),
-        bottomNavigationBar: BottomNavigationBar(
-          onTap: _onTabTapped,
-          currentIndex: _currentIndex,
-          items: const [
-            BottomNavigationBarItem(icon: Icon(Icons.home), label: 'Home'),
-            BottomNavigationBarItem(icon: Icon(Icons.mail), label: 'Messages'),
-            BottomNavigationBarItem(icon: Icon(Icons.person), label: 'Profile')
-          ],
-        ),
+    return Scaffold(
+      appBar: AppBar(title: const Text('Scroll to top')),
+      body: IndexedStack(
+        index: _currentIndex,
+        children: [
+          ContentPage(
+            backgroundColor: Colors.white,
+            isOnScreen: _currentIndex == 0,
+          ),
+          ContentPage(
+            backgroundColor: Colors.deepOrange,
+            isOnScreen: _currentIndex == 1,
+          ),
+          ContentPage(
+            backgroundColor: Colors.green,
+            isOnScreen: _currentIndex == 2,
+          ),
+        ],
+      ),
+      bottomNavigationBar: BottomNavigationBar(
+        onTap: _onTabTapped,
+        currentIndex: _currentIndex,
+        items: const [
+          BottomNavigationBarItem(icon: Icon(Icons.home), label: 'Home'),
+          BottomNavigationBarItem(icon: Icon(Icons.mail), label: 'Messages'),
+          BottomNavigationBarItem(icon: Icon(Icons.person), label: 'Profile')
+        ],
       ),
     );
   }
 
-  Future<void> _onScrollsToTop(ScrollsToTopEvent event) async {
-    _streams[_currentIndex].add(event);
-  }
-
   void _onTabTapped(int index) {
     setState(() {
       _currentIndex = index;

example/pubspec.lock

@@ -40,21 +40,14 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
-  rxdart:
-    dependency: "direct main"
-    description:
-      name: rxdart
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.27.1"
+    version: "1.4.0"
   scrolls_to_top:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "1.0.0"
+    version: "1.0.1"
   sky_engine:
     dependency: transitive
     description: flutter

example/pubspec.yaml

@@ -1,5 +1,4 @@
 name: example
-
 publish_to: none
 version: 1.0.0+1
 
@@ -11,7 +10,6 @@ dependencies:
     sdk: flutter
   scrolls_to_top:
     path: ../
-  rxdart: ^0.27.1
 
 dev_dependencies:
   flutter_lints: ^1.0.3

lib/scrolls_to_top.dart

@@ -29,12 +29,12 @@ class ScrollsToTop extends StatefulWidget {
   /// Creates new ScrollsToTop widget
   const ScrollsToTop({
     Key? key,
-    required this.scaffold,
+    required this.child,
     required this.onScrollsToTop,
   }) : super(key: key);
 
-  /// Primary scaffold of your app
-  final Scaffold scaffold;
+  /// Any child widget
+  final Widget child;
 
   /// Callback for handle scrolls-to-top event
   final ScrollsToTopCallback onScrollsToTop;
@@ -66,7 +66,7 @@ class _ScrollsToTopState extends State<ScrollsToTop> {
       _attach(context);
       _attached = true;
     }
-    return widget.scaffold;
+    return widget.child;
   }
 
   void _attach(BuildContext context) {
@@ -90,21 +90,21 @@ class _FakeScrollPositionWithSingleContext
   _FakeScrollPositionWithSingleContext({
     required BuildContext context,
     required ScrollsToTopCallback callback,
-  })  : _onScrollsToTop = callback,
+  })  : _callback = callback,
         super(
           physics: const NeverScrollableScrollPhysics(),
           context: _FakeScrollContext(context),
         );
 
-  final ScrollsToTopCallback _onScrollsToTop;
+  final ScrollsToTopCallback _callback;
 
   @override
   Future<void> animateTo(
     double to, {
     required Duration duration,
     required Curve curve,
   }) {
-    return _onScrollsToTop(
+    return _callback(
       ScrollsToTopEvent(to, duration: duration, curve: curve),
     );
   }

pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.6.1"
+    version: "2.7.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -87,7 +87,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.4.0"
   path:
     dependency: transitive
     description:
@@ -141,7 +141,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.0"
+    version: "0.4.0"
   typed_data:
     dependency: transitive
     description: