Bugfixes for ScrollController and improve compatibly with CupertinoApp/WidgetsApp

Merge pull request #7 from bierbaumtim/master
Bugfixes for ScrollController and improvements to compatibly with CupertinoApp/WidgetsApp

@@ -4,4 +4,6 @@
 
 ## [0.1.4] - Clean code and fix small bugs
 
-
+## [0.1.5] - Bugfixes
+- fix assertion in CupertinoBottomSheet and BottomSheetRoute when using the CupetinoApp or WidgetsApp as root
+- fix assertion when scrollController isn't used by the builder 
\ No newline at end of file

@@ -231,6 +231,8 @@ class _ModalBottomSheetState extends State<ModalBottomSheet>
   void _handleScrollUpdate(ScrollNotification notification) {
     if (notification.metrics.pixels <= notification.metrics.minScrollExtent) {
       //Check if listener is same from scrollController
+      if (!_scrollController.hasClients) return;
+
       if (_scrollController.position.pixels != notification.metrics.pixels) {
         return;
       }

 import 'dart:async';
 
 import 'package:flutter/cupertino.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 import '../modal_bottom_sheet.dart';
@@ -32,15 +33,18 @@ class _ModalBottomSheet<T> extends StatefulWidget {
 }
 
 class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
-  String _getRouteLabel(MaterialLocalizations localizations) {
-    final platform = Theme.of(context).platform;
+  String _getRouteLabel() {
+    final platform = Theme.of(context)?.platform ?? defaultTargetPlatform;
     switch (platform) {
       case TargetPlatform.iOS:
         return '';
       case TargetPlatform.android:
       case TargetPlatform.fuchsia:
-        return localizations.dialogLabel;
-        break;
+        if (Localizations.of(context, MaterialLocalizations) != null) {
+          return MaterialLocalizations.of(context).dialogLabel;
+        } else {
+          return DefaultMaterialLocalizations().dialogLabel;
+        }
     }
     return null;
   }
@@ -64,9 +68,6 @@ class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
   @override
   Widget build(BuildContext context) {
     assert(debugCheckHasMediaQuery(context));
-    assert(debugCheckHasMaterialLocalizations(context));
-    final localizations = MaterialLocalizations.of(context);
-    final routeLabel = _getRouteLabel(localizations);
 
     return AnimatedBuilder(
       animation: widget.route._animationController,
@@ -76,7 +77,7 @@ class _ModalBottomSheetState<T> extends State<_ModalBottomSheet<T>> {
         return Semantics(
           scopesRoute: true,
           namesRoute: true,
-          label: routeLabel,
+          label: _getRouteLabel(),
           explicitChildNodes: true,
           child: ModalBottomSheet(
             expanded: widget.route.expanded,

@@ -4,10 +4,15 @@
 
 import 'dart:async';
 
-import 'package:flutter/cupertino.dart';
+import 'package:flutter/cupertino.dart' show CupertinoTheme;
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
-import 'package:flutter/material.dart';
+import 'package:flutter/material.dart'
+    show
+        Colors,
+        Theme,
+        MaterialLocalizations,
+        debugCheckHasMaterialLocalizations;
 import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 
@@ -78,7 +83,13 @@ Future<T> showCupertinoModalBottomSheet<T>({
   assert(useRootNavigator != null);
   assert(enableDrag != null);
   assert(debugCheckHasMediaQuery(context));
-  assert(debugCheckHasMaterialLocalizations(context));
+  final hasMaterialLocalizations =
+      Localizations.of<MaterialLocalizations>(context, MaterialLocalizations) !=
+          null;
+  final barrierLabel = hasMaterialLocalizations
+      ? MaterialLocalizations.of(context).modalBarrierDismissLabel
+      : '';
+
   final result = await Navigator.of(context, rootNavigator: useRootNavigator)
       .push(CupertinoModalBottomSheetRoute<T>(
     builder: builder,
@@ -88,7 +99,7 @@ Future<T> showCupertinoModalBottomSheet<T>({
     ),
     secondAnimationController: secondAnimation,
     expanded: expand,
-    barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel,
+    barrierLabel: barrierLabel,
     elevation: elevation,
     bounce: bounce,
     shape: shape,
@@ -264,7 +275,12 @@ class CupertinoScaffold extends StatefulWidget {
     assert(useRootNavigator != null);
     assert(enableDrag != null);
     assert(debugCheckHasMediaQuery(context));
-    assert(debugCheckHasMaterialLocalizations(context));
+    final isCupertinoApp = Theme.of(context, shadowThemeOnly: true) == null;
+    String barrierLabel = '';
+    if (!isCupertinoApp) {
+      assert(debugCheckHasMaterialLocalizations(context));
+      barrierLabel = MaterialLocalizations.of(context).modalBarrierDismissLabel;
+    }
     final result = await Navigator.of(context, rootNavigator: useRootNavigator)
         .push(CupertinoModalBottomSheetRoute<T>(
       builder: builder,
@@ -274,7 +290,7 @@ class CupertinoScaffold extends StatefulWidget {
         backgroundColor: backgroundColor,
       ),
       expanded: expand,
-      barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel,
+      barrierLabel: barrierLabel,
       bounce: bounce,
       isDismissible: isDismissible ?? expand == false ? true : false,
       modalBarrierColor: barrierColor ?? Colors.black12,

 name: modal_bottom_sheet
 description: 'Create awesome and powerful modal bottom sheets. Material, Cupertino or create your own'
-version: 0.1.4
+version: 0.1.5
 homepage: 'https://github.com/jamesblasco/modal_bottom_sheet'
 
 environment: