Merge branch 'primary-scroll'

@@ -53,8 +53,8 @@ class CupertinoSharePage extends StatelessWidget {
                 expand: true,
                 context: context,
                 backgroundColor: Colors.transparent,
-                builder: (context, scrollController) =>
-                    PhotoShareBottomSheet(scrollController: scrollController),
+                builder: (context) =>
+                    PhotoShareBottomSheet(),
               );
             },
           ),
@@ -73,9 +73,9 @@ class CupertinoSharePage extends StatelessWidget {
 }
 
 class PhotoShareBottomSheet extends StatelessWidget {
-  final ScrollController scrollController;
 
-  const PhotoShareBottomSheet({Key key, this.scrollController})
+
+  const PhotoShareBottomSheet({Key key})
       : super(key: key);
 
   @override
@@ -92,7 +92,7 @@ class PhotoShareBottomSheet extends StatelessWidget {
               appBar: appBar(context),
               body: CustomScrollView(
                 physics: ClampingScrollPhysics(),
-                controller: scrollController,
+                  controller: ModalScrollController.of(context),
                 slivers: <Widget>[
                   SliverSafeArea(
                     bottom: false,

@@ -51,11 +51,9 @@ class MyApp extends StatelessWidget {
                                     expand: true,
                                     context: context,
                                     backgroundColor: Colors.transparent,
-                                    builder: (context, scrollController) =>
-                                        Stack(
+                                    builder: (context) => Stack(
                                       children: <Widget>[
-                                        ModalWithScroll(
-                                            scrollController: scrollController),
+                                        ModalWithScroll(),
                                         Positioned(
                                           height: 40,
                                           left: 40,
@@ -131,8 +129,7 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: false,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ModalFit(scrollController: scrollController),
+                              builder: (context) => ModalFit(),
                             )),
                     ListTile(
                         title: Text('Bar Modal'),
@@ -140,9 +137,7 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: true,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ModalInsideModal(
-                                      scrollController: scrollController),
+                              builder: (context) => ModalInsideModal(),
                             )),
                     ListTile(
                         title: Text('Avatar Modal'),
@@ -150,16 +145,13 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: true,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ModalInsideModal(
-                                      scrollController: scrollController),
+                              builder: (context) => ModalInsideModal(),
                             )),
                     ListTile(
                         title: Text('Float Modal'),
                         onTap: () => showFloatingModalBottomSheet(
                               context: context,
-                              builder: (context, scrollController) =>
-                                  ModalFit(scrollController: scrollController),
+                              builder: (context) => ModalFit(),
                             )),
                     ListTile(
                         title: Text('Cupertino Modal fit'),
@@ -167,8 +159,7 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: false,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ModalFit(scrollController: scrollController),
+                              builder: (context) => ModalFit(),
                             )),
                     section('COMPLEX CASES'),
                     ListTile(
@@ -177,8 +168,7 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: true,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ModalFit(scrollController: scrollController),
+                              builder: (context) => ModalFit(),
                             )),
                     ListTile(
                         title: Text('Reverse list'),
@@ -186,10 +176,8 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: true,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ModalInsideModal(
-                                      scrollController: scrollController,
-                                      reverse: true),
+                              builder: (context) =>
+                                  ModalInsideModal(reverse: true),
                             )),
                     ListTile(
                         title: Text('Cupertino Modal inside modal'),
@@ -197,9 +185,7 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: true,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ModalInsideModal(
-                                      scrollController: scrollController),
+                              builder: (context) => ModalInsideModal(),
                             )),
                     ListTile(
                         title: Text('Cupertino Modal with inside navigation'),
@@ -207,9 +193,7 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: true,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ModalWithNavigator(
-                                      scrollController: scrollController),
+                              builder: (context) => ModalWithNavigator(),
                             )),
                     ListTile(
                         title:
@@ -218,9 +202,8 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: true,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ComplexModal(
-                                      scrollController: scrollController),
+                              builder: (context) =>
+                                  ComplexModal(),
                             )),
                     ListTile(
                         title: Text('Modal with WillPopScope'),
@@ -228,18 +211,16 @@ class _MyHomePageState extends State<MyHomePage> {
                               expand: true,
                               context: context,
                               backgroundColor: Colors.transparent,
-                              builder: (context, scrollController) =>
-                                  ModalWillScope(
-                                      scrollController: scrollController),
+                              builder: (context) =>
+                                  ModalWillScope(),
                             )),
                     ListTile(
                         title: Text('Modal with Nested Scroll'),
                         onTap: () => showCupertinoModalBottomSheet(
                               expand: true,
                               context: context,
-                              builder: (context, scrollController) =>
-                                  NestedScrollModal(
-                                      scrollController: scrollController),
+                              builder: (context) =>
+                                  NestedScrollModal(),
                             )),
                     ListTile(
                         title: Text('Modal with PageView'),

@@ -69,7 +69,7 @@ class AvatarBottomSheet extends StatelessWidget {
 
 Future<T> showAvatarModalBottomSheet<T>({
   @required BuildContext context,
-  @required ScrollWidgetBuilder builder,
+  @required WidgetBuilder builder,
   Color backgroundColor,
   double elevation,
   ShapeBorder shape,

@@ -27,7 +27,7 @@ class FloatingModal extends StatelessWidget {
 
 Future<T> showFloatingModalBottomSheet<T>({
   @required BuildContext context,
-  @required ScrollWidgetBuilder builder,
+  @required WidgetBuilder builder,
   Color backgroundColor,
 }) async {
   final result = await showCustomModalBottomSheet(

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 
 class ComplexModal extends StatelessWidget {
-  final ScrollController scrollController;
-
-  const ComplexModal({Key key, this.scrollController}) : super(key: key);
+  const ComplexModal({Key key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -46,7 +45,7 @@ class ComplexModal extends StatelessWidget {
                   bottom: false,
                   child: ListView(
                     shrinkWrap: true,
-                    controller: scrollController,
+                    controller: ModalScrollController.of(context),
                     children: ListTile.divideTiles(
                       context: context,
                       tiles: List.generate(

@@ -2,9 +2,9 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
 class ModalFit extends StatelessWidget {
-  final ScrollController scrollController;
 
-  const ModalFit({Key key, this.scrollController}) : super(key: key);
+
+  const ModalFit({Key key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {

@@ -3,11 +3,9 @@ import 'package:flutter/material.dart';
 import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 
 class ModalInsideModal extends StatelessWidget {
-  final ScrollController scrollController;
   final bool reverse;
 
-  const ModalInsideModal({Key key, this.scrollController, this.reverse = false})
-      : super(key: key);
+  const ModalInsideModal({Key key, this.reverse = false}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -20,7 +18,7 @@ class ModalInsideModal extends StatelessWidget {
         child: ListView(
           reverse: reverse,
           shrinkWrap: true,
-          controller: scrollController,
+          controller: ModalScrollController.of(context),
           physics: ClampingScrollPhysics(),
           children: ListTile.divideTiles(
               context: context,
@@ -33,10 +31,8 @@ class ModalInsideModal extends StatelessWidget {
                           isDismissible: false,
                           context: context,
                           backgroundColor: Colors.transparent,
-                          builder: (context, scrollController) =>
-                              ModalInsideModal(
-                                  scrollController: scrollController,
-                                  reverse: reverse),
+                          builder: (context) =>
+                              ModalInsideModal(reverse: reverse),
                         )),
               )).toList(),
         ),

@@ -2,9 +2,9 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
 class ModalWillScope extends StatelessWidget {
-  final ScrollController scrollController;
 
-  const ModalWillScope({Key key, this.scrollController}) : super(key: key);
+
+  const ModalWillScope({Key key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 
 class ModalWithNavigator extends StatelessWidget {
-  final ScrollController scrollController;
 
-  const ModalWithNavigator({Key key, this.scrollController}) : super(key: key);
+
+  const ModalWithNavigator({Key key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -20,7 +21,7 @@ class ModalWithNavigator extends StatelessWidget {
               bottom: false,
               child: ListView(
                 shrinkWrap: true,
-                controller: scrollController,
+                controller: ModalScrollController.of(context),
                 children: ListTile.divideTiles(
                   context: context,
                   tiles: List.generate(

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 
 class NestedScrollModal extends StatelessWidget {
-  final ScrollController scrollController;
+  const NestedScrollModal({Key key}) : super(key: key);
 
-  const NestedScrollModal({Key key, this.scrollController}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -23,7 +23,7 @@ class NestedScrollModal extends StatelessWidget {
         ];
       },
       body: ListView.builder(
-        controller: scrollController,
+        controller: ModalScrollController.of(context),
         itemBuilder: (context, index) {
           return Container(
             height: 100,

 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';
 
 class ModalWithScroll extends StatelessWidget {
-  final ScrollController scrollController;
-
-  const ModalWithScroll({Key key, this.scrollController}) : super(key: key);
+  const ModalWithScroll({Key key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
+  
     return Material(
       child: CupertinoPageScaffold(
         navigationBar: CupertinoNavigationBar(
@@ -16,7 +16,7 @@ class ModalWithScroll extends StatelessWidget {
           bottom: false,
           child: ListView(
             shrinkWrap: true,
-            controller: scrollController,
+            controller: ModalScrollController.of(context),
             children: ListTile.divideTiles(
               context: context,
               tiles: List.generate(

@@ -4,3 +4,4 @@ export 'src/material_with_modal_page_route.dart';
 export 'src/bottom_sheets/cupertino_bottom_sheet.dart';
 export 'src/bottom_sheets/material_bottom_sheet.dart';
 export 'src/bottom_sheets/bar_bottom_sheet.dart';
+export 'src/utils/modal_scroll_controller.dart';
\ No newline at end of file

@@ -9,7 +9,7 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:flutter/widgets.dart';
-import 'package:modal_bottom_sheet/src/utils/primary_scroll_status_bar.dart';
+import 'package:modal_bottom_sheet/src/utils/scroll_to_top_status_bar.dart';
 
 import 'package:modal_bottom_sheet/src/utils/bottom_sheet_suspended_curve.dart';
 
@@ -20,9 +20,6 @@ const double _minFlingVelocity = 500.0;
 const double _closeProgressThreshold = 0.6;
 const double _willPopThreshold = 0.8;
 
-typedef ScrollWidgetBuilder = Widget Function(
-    BuildContext context, ScrollController controller);
-
 typedef WidgetWithChildBuilder = Widget Function(
     BuildContext context, Animation<double> animation, Widget child);
 
@@ -51,10 +48,10 @@ class ModalBottomSheet extends StatefulWidget {
     this.scrollController,
     this.expanded,
     @required this.onClosing,
-    @required this.builder,
+    @required this.child,
   })  : assert(enableDrag != null),
         assert(onClosing != null),
-        assert(builder != null),
+        assert(child != null),
         super(key: key);
 
   /// The closeProgressThreshold parameter
@@ -100,7 +97,7 @@ class ModalBottomSheet extends StatefulWidget {
 
   /// A builder for the contents of the sheet.
   ///
-  final ScrollWidgetBuilder builder;
+  final Widget child;
 
   /// If true, the bottom sheet can be dragged up and down and dismissed by
   /// swiping downwards.
@@ -135,7 +132,7 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
     with TickerProviderStateMixin {
   final GlobalKey _childKey = GlobalKey(debugLabel: 'BottomSheet child');
 
-  ScrollController _scrollController;
+  ScrollController get _scrollController => widget.scrollController;
 
   AnimationController _bounceDragController;
 
@@ -267,6 +264,9 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
     //Check if there is more than 1 attached ScrollController e.g. swiping page in PageView
     if (_scrollController.positions.length > 1) return;
 
+    if (_scrollController !=
+        Scrollable.of(notification.context).widget.controller) return;
+
     final scrollPosition = _scrollController.position;
 
     if (scrollPosition.axis == Axis.horizontal) return;
@@ -277,14 +277,6 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
         : scrollPosition.maxScrollExtent - scrollPosition.pixels;
 
     if (offset <= 0) {
-      // Check if listener is same from scrollController.
-      // TODO: Improve the way it checks if it the same view controller
-      // Use PrimaryScrollController
-      if (_scrollController.position.pixels != notification.metrics.pixels &&
-          !(_scrollController.position.pixels == 0 &&
-              notification.metrics.pixels >= 0)) {
-        return;
-      }
       // Clamping Scroll Physics end with a ScrollEndNotification with a DragEndDetail class
       // while Bouncing Scroll Physics or other physics that Overflow don't return a drag end info
 
@@ -297,7 +289,7 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
         return;
       }
 
-// Otherwise the calculate the velocity with a VelocityTracker
+      // Otherwise the calculate the velocity with a VelocityTracker
       if (_velocityTracker == null) {
         final pointerKind = defaultPointerDeviceKind(context);
         _velocityTracker = VelocityTracker();
@@ -331,7 +323,7 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
     animationCurve = _defaultCurve;
     _bounceDragController =
         AnimationController(vsync: this, duration: Duration(milliseconds: 300));
-    _scrollController = widget.scrollController ?? ScrollController();
+
     // Todo: Check if we can remove scroll Controller
     super.initState();
   }
@@ -343,8 +335,7 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
       curve: Curves.easeOutSine,
     );
 
-    var child = widget.builder(context, _scrollController);
-
+    var child = widget.child;
     if (widget.containerBuilder != null) {
       child = widget.containerBuilder(
         context,
@@ -402,8 +393,10 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
       child: RepaintBoundary(child: child),
     );
 
-    return PrimaryScrollStatusBarHandler(
-        scrollController: _scrollController, child: child);
+    return ScrollToTopStatusBarHandler(
+      child: child,
+      scrollController: _scrollController,
+    );
   }
 }
 

@@ -3,6 +3,7 @@ import 'dart:async';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
+import 'package:modal_bottom_sheet/src/utils/modal_scroll_controller.dart';
 
 import '../modal_bottom_sheet.dart';
 
@@ -15,7 +16,6 @@ class _ModalBottomSheet<T> extends StatefulWidget {
     this.route,
     this.secondAnimationController,
     this.bounce = false,
-    this.scrollController,
     this.expanded = false,
     this.enableDrag = true,
     this.animationCurve,
@@ -30,7 +30,6 @@ class _ModalBottomSheet<T> extends StatefulWidget {
   final bool enableDrag;
   final AnimationController secondAnimationController;
   final Curve animationCurve;
-  final ScrollController scrollController;
 
   @override
   _ModalBottomSheetState<T> createState() => _ModalBottomSheetState<T>();
@@ -56,6 +55,8 @@ class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
     return null;
   }
 
+  ScrollController _scrollController;
+
   @override
   void initState() {
     widget.route.animation.addListener(updateController);
@@ -65,6 +66,7 @@ class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
   @override
   void dispose() {
     widget.route.animation.removeListener(updateController);
+    _scrollController?.dispose();
     super.dispose();
   }
 
@@ -75,8 +77,12 @@ class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
   @override
   Widget build(BuildContext context) {
     assert(debugCheckHasMediaQuery(context));
-
-    return AnimatedBuilder(
+    final scrollController = PrimaryScrollController.of(context) ??
+          (_scrollController ??= ScrollController());
+    return ModalScrollController(
+      controller: scrollController,
+      child: Builder(
+        builder: (context) => AnimatedBuilder(
           animation: widget.route._animationController,
           builder: (BuildContext context, Widget child) {
             // Disable the initial animation when accessible navigation is on so
@@ -87,7 +93,6 @@ class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
               label: _getRouteLabel(),
               explicitChildNodes: true,
               child: ModalBottomSheet(
-            closeProgressThreshold: widget.closeProgressThreshold,
                 expanded: widget.route.expanded,
                 containerBuilder: widget.route.containerBuilder,
                 animationController: widget.route._animationController,
@@ -102,14 +107,17 @@ class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
                     Navigator.of(context).pop();
                   }
                 },
-            builder: widget.route.builder,
+                child: child,
                 enableDrag: widget.enableDrag,
                 bounce: widget.bounce,
-            scrollController: widget.scrollController,
+                scrollController: scrollController,
                 animationCurve: widget.animationCurve,
               ),
             );
           },
+          child: widget.route.builder(context),
+        ),
+      ),
     );
   }
 }
@@ -137,7 +145,7 @@ class ModalBottomSheetRoute<T> extends PopupRoute<T> {
 
   final double closeProgressThreshold;
   final WidgetWithChildBuilder containerBuilder;
-  final ScrollWidgetBuilder builder;
+  final WidgetBuilder builder;
   final bool expanded;
   final bool bounce;
   final Color modalBarrierColor;
@@ -189,7 +197,6 @@ class ModalBottomSheetRoute<T> extends PopupRoute<T> {
         route: this,
         secondAnimationController: secondAnimationController,
         expanded: expanded,
-        scrollController: scrollController,
         bounce: bounce,
         enableDrag: enableDrag,
         animationCurve: animationCurve,
@@ -218,7 +225,7 @@ class ModalBottomSheetRoute<T> extends PopupRoute<T> {
 /// Shows a modal material design bottom sheet.
 Future<T> showCustomModalBottomSheet<T>({
   @required BuildContext context,
-  @required ScrollWidgetBuilder builder,
+  @required WidgetBuilder builder,
   @required WidgetWithChildBuilder containerWidget,
   Color backgroundColor,
   double elevation,
@@ -232,7 +239,6 @@ Future<T> showCustomModalBottomSheet<T>({
   bool useRootNavigator = false,
   bool isDismissible = true,
   bool enableDrag = true,
-  ScrollController scrollController,
   Duration duration,
 }) async {
   assert(context != null);

@@ -71,7 +71,7 @@ class BarBottomSheet extends StatelessWidget {
 
 Future<T> showBarModalBottomSheet<T>({
   @required BuildContext context,
-  @required ScrollWidgetBuilder builder,
+  @required WidgetBuilder builder,
   Color backgroundColor,
   double elevation,
   ShapeBorder shape,

@@ -67,7 +67,7 @@ class _CupertinoBottomSheetContainer extends StatelessWidget {
 
 Future<T> showCupertinoModalBottomSheet<T>({
   @required BuildContext context,
-  @required ScrollWidgetBuilder builder,
+  @required WidgetBuilder builder,
   Color backgroundColor,
   double elevation,
   double closeProgressThreshold,
@@ -139,7 +139,7 @@ class CupertinoModalBottomSheetRoute<T> extends ModalBottomSheetRoute<T> {
   final Color transitionBackgroundColor;
 
   CupertinoModalBottomSheetRoute({
-    ScrollWidgetBuilder builder,
+    WidgetBuilder builder,
     WidgetWithChildBuilder containerBuilder,
     double closeProgressThreshold,
     String barrierLabel,
@@ -321,8 +321,8 @@ class CupertinoScaffold extends StatefulWidget {
 
   static Future<T> showCupertinoModalBottomSheet<T>({
     @required BuildContext context,
-    @required ScrollWidgetBuilder builder,
     double closeProgressThreshold,
+    @required WidgetBuilder builder,
     Curve animationCurve,
     Curve previousRouteAnimationCurve,
     Color backgroundColor,

@@ -5,8 +5,8 @@ import 'dart:async';
 /// Shows a modal material design bottom sheet.
 Future<T> showMaterialModalBottomSheet<T>({
   @required BuildContext context,
-  @required ScrollWidgetBuilder builder,
   double closeProgressThreshold,
+  @required WidgetBuilder builder,
   Color backgroundColor,
   double elevation,
   ShapeBorder shape,

+import 'package:flutter/rendering.dart';
+import 'package:flutter/widgets.dart';
+
+/// Associates a [ScrollController] with a subtree.
+///
+/// This mechanism can be used to provide default behavior for scroll views in a
+/// subtree inside a modal bottom sheet.
+///
+/// We want to remove this and use [PrimaryScrollController].
+/// This issue should be solved first https://github.com/flutter/flutter/issues/64236
+///
+/// See [PrimaryScrollController]
+class ModalScrollController extends InheritedWidget {
+  /// Creates a widget that associates a [ScrollController] with a subtree.
+  ModalScrollController({
+    Key key,
+    @required this.controller,
+    @required Widget child,
+  })  : assert(controller != null),
+        super(
+          key: key,
+          child: PrimaryScrollController(
+            controller: controller,
+            child: child,
+          ),
+        );
+
+  /// The [ScrollController] associated with the subtree.
+  ///
+  /// See also:
+  ///
+  ///  * [ScrollView.controller], which discusses the purpose of specifying a
+  ///    scroll controller.
+  final ScrollController controller;
+
+  /// Returns the [ScrollController] most closely associated with the given
+  /// context.
+  ///
+  /// Returns null if there is no [ScrollController] associated with the given
+  /// context.
+  static ScrollController of(BuildContext context) {
+    final ModalScrollController result =
+        context.dependOnInheritedWidgetOfExactType<ModalScrollController>();
+    return result?.controller;
+  }
+
+  @override
+  bool updateShouldNotify(ModalScrollController oldWidget) =>
+      controller != oldWidget.controller;
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(DiagnosticsProperty<ScrollController>(
+        'controller', controller,
+        ifNull: 'no controller', showName: false));
+  }
+}

 import 'package:flutter/widgets.dart';
 
-/// Creates a primary scroll controller that will
-/// scroll to the top when tapped on the status bar
+/// Widget that that will scroll to the top the ScrollController
+/// when tapped on the status bar
 ///
-class PrimaryScrollStatusBarHandler extends StatefulWidget {
-  final ScrollController scrollController;
+class ScrollToTopStatusBarHandler extends StatefulWidget {
   final Widget child;
+  final ScrollController scrollController;
+
+  const ScrollToTopStatusBarHandler({
+    Key key,
+    @required this.child,
+    @required this.scrollController,
+  }) : super(key: key);
 
-  const PrimaryScrollStatusBarHandler(
-      {Key key, this.child, this.scrollController})
-      : super(key: key);
   @override
-  _PrimaryScrollWidgetState createState() => _PrimaryScrollWidgetState();
+  _ScrollToTopStatusBarState createState() => _ScrollToTopStatusBarState();
 }
 
-class _PrimaryScrollWidgetState extends State<PrimaryScrollStatusBarHandler> {
-  ScrollController controller;
-
+class _ScrollToTopStatusBarState extends State<ScrollToTopStatusBarHandler> {
   @override
   void initState() {
-    controller = widget.scrollController ?? ScrollController();
     super.initState();
   }
 
   @override
   Widget build(BuildContext context) {
-    return PrimaryScrollController(
-      controller: controller,
-      child: Stack(
+    return Stack(
       fit: StackFit.expand,
       children: [
         widget.child,
@@ -46,13 +44,12 @@ class _PrimaryScrollWidgetState extends State<PrimaryScrollStatusBarHandler> {
           ),
         ),
       ],
-      ),
     );
   }
 
   void _handleStatusBarTap(BuildContext context) {
-    final controller = PrimaryScrollController.of(context);
-    if (controller.hasClients) {
+    final controller = widget.scrollController;
+    if (controller != null && controller.hasClients) {
       controller.animateTo(
         0.0,
         duration: const Duration(milliseconds: 300),