Added trailing button to delete cart item in provider_shopper App (#571)

provider_shopper/lib/models/cart.dart

@@ -40,4 +40,11 @@ class CartModel extends ChangeNotifier {
     // depend on it.
     notifyListeners();
   }
+
+  void remove(Item item) {
+    _itemIds.remove(item.id);
+    // Don't forget to tell dependent widgets to rebuild _every time_
+    // you change the model.
+    notifyListeners();
+  }
 }

provider_shopper/lib/screens/cart.dart

@@ -46,6 +46,12 @@ class _CartList extends StatelessWidget {
       itemCount: cart.items.length,
       itemBuilder: (context, index) => ListTile(
         leading: Icon(Icons.done),
+        trailing: IconButton(
+          icon: Icon(Icons.remove_circle_outline),
+          onPressed: () {
+            cart.remove(cart.items[index]);
+          },
+        ),
         title: Text(
           cart.items[index].name,
           style: itemNameStyle,

provider_shopper/pubspec.lock

@@ -73,7 +73,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.3"
+    version: "1.3.0-nullsafety.4"
   nested:
     dependency: transitive
     description:
@@ -120,7 +120,7 @@ packages:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety.1"
+    version: "1.10.0-nullsafety.4"
   stream_channel:
     dependency: transitive
     description:
@@ -164,5 +164,5 @@ packages:
     source: hosted
     version: "2.1.0-nullsafety.3"
 sdks:
-  dart: ">=2.10.0-110 <2.11.0"
+  dart: ">=2.10.0-110 <=2.11.0-234.0.dev"
   flutter: ">=1.16.0"