Merge pull request #245 from AhmedLSayed9/feature/value_and_multi_val…

…ue_listenables Introduce valueListenable and multiValueListenable
AhmedLSayed9 · Mar 9, 2024 · 3c29b93 · 3c29b93
2 parents 6310ff3 + b5faa4c
commit 3c29b93
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Showing 17 changed files with 303 additions and 239 deletions.
diff --git a/README.md b/README.md
diff --git a/packages/dropdown_button2/example/custom_dropdown_button2.dart b/packages/dropdown_button2/example/custom_dropdown_button2.dart
@@ -1,10 +1,11 @@
 import 'package:dropdown_button2/dropdown_button2.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 class CustomDropdownButton2 extends StatelessWidget {
   const CustomDropdownButton2({
     required this.hint,
-    required this.value,
+    required this.valueListenable,
     required this.dropdownItems,
     required this.onChanged,
     this.selectedItemBuilder,
@@ -33,7 +34,7 @@ class CustomDropdownButton2 extends StatelessWidget {
     super.key,
   });
   final String hint;
-  final String? value;
+  final ValueListenable<String?>? valueListenable;
   final List<String> dropdownItems;
   final ValueChanged<String?>? onChanged;
   final DropdownButtonBuilder? selectedItemBuilder;
@@ -76,7 +77,7 @@ class CustomDropdownButton2 extends StatelessWidget {
             ),
           ),
         ),
-        value: value,
+        valueListenable: valueListenable,
         items: dropdownItems
             .map((String item) => DropdownItem<String>(
                   value: item,

diff --git a/packages/dropdown_button2/example/example.dart b/packages/dropdown_button2/example/example.dart
@@ -35,7 +35,7 @@ class _MyHomePageState extends State<MyHomePage> {
     'Item7',
     'Item8',
   ];
-  String? selectedValue;
+  final valueListenable = ValueNotifier<String?>(null);
 
   @override
   Widget build(BuildContext context) {
@@ -82,11 +82,9 @@ class _MyHomePageState extends State<MyHomePage> {
                       ),
                     ))
                 .toList(),
-            value: selectedValue,
-            onChanged: (String? value) {
-              setState(() {
-                selectedValue = value;
-              });
+            valueListenable: valueListenable,
+            onChanged: (value) {
+              valueListenable.value = value;
             },
             buttonStyleData: ButtonStyleData(
               height: 50,