merge material 3

lib/pages/package_search/package_serach.dart

@@ -3,6 +3,7 @@ import 'package:fcs/helpers/theme.dart';
 import 'package:fcs/pages/package/model/package_model.dart';
 import 'package:fcs/pages/package/package_list_row.dart';
 import 'package:fcs/pages/widgets/barcode_scanner.dart';
+import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_vector_icons/flutter_vector_icons.dart';
 import 'package:provider/provider.dart';
@@ -28,13 +29,15 @@ class PackageSearchDelegate extends SearchDelegate<Package> {
     final ThemeData theme = Theme.of(context);
     return theme.copyWith(
       appBarTheme: AppBarTheme(color: primaryColor),
+      iconButtonTheme: IconButtonThemeData(
+          style: ButtonStyle(
+              iconColor: MaterialStateProperty.all<Color>(Colors.white))),
       inputDecorationTheme: InputDecorationTheme(
           border: InputBorder.none,
-          hintStyle: TextStyle(
-              color: theme.primaryTextTheme.caption?.color, fontSize: 14)),
+          hintStyle: TextStyle(color: Colors.grey, fontSize: 14)),
       textTheme: TextTheme(
-          headline1: TextStyle(
-              color: theme.primaryTextTheme.headline1?.color,
+          displayLarge: TextStyle(
+              color: theme.primaryTextTheme.displayLarge?.color,
               fontSize: 16,
               backgroundColor: primaryColor)),
       primaryColor: primaryColor,
@@ -59,7 +62,7 @@ class PackageSearchDelegate extends SearchDelegate<Package> {
   @override
   Widget buildLeading(BuildContext context) {
     return IconButton(
-      icon: Icon(Icons.arrow_back),
+      icon: Icon(CupertinoIcons.back),
       onPressed: () => close(context, new Package()),
     );
   }