Make navigation bar and app bar nodes extend ParentReactionMixin

Author: imaachman

lib/src/api/nodes/app_bar_node.dart

@@ -21,7 +21,7 @@ const double kAppBarDefaultHeight = 56;
 /// in Flutter for more details.
 @JsonSerializable()
 class AppBarNode extends SceneNode
-    with CustomPropertiesMixin, VariablePropertiesMixin {
+    with CustomPropertiesMixin, VariablePropertiesMixin, ParentReactionMixin {
   @override
   final String type = 'appBar';
 
@@ -54,6 +54,16 @@ class AppBarNode extends SceneNode
   @override
   List<TriggerType> get triggerTypes => [TriggerType.click];
 
+  @override
+  List<ReactionMixin> get reactiveChildren {
+    final List<ReactionMixin> items = [...properties.actions];
+    if (properties.leading.icon.show &&
+        properties.automaticallyImplyLeading == false) {
+      items.add(properties.leading);
+    }
+    return items;
+  }
+
   /// Creates a new [AppBarNode] instance from a JSON data.
   factory AppBarNode.fromJson(Map json) => _$AppBarNodeFromJson(json);
 

lib/src/api/nodes/navigation_bar_node.dart

@@ -136,7 +136,7 @@ const double kDefaultNavigationBarHeight = 80;
 /// Inspired from: https://m3.material.io/components/navigation-bar.
 @JsonSerializable()
 class NavigationBarNode extends SceneNode
-    with CustomPropertiesMixin, VariablePropertiesMixin {
+    with CustomPropertiesMixin, VariablePropertiesMixin, ParentReactionMixin {
   @override
   final String type = 'navigationBar';
 
@@ -174,6 +174,9 @@ class NavigationBarNode extends SceneNode
   @override
   List<TriggerType> get triggerTypes => [TriggerType.click];
 
+  @override
+  List<ReactionMixin> get reactiveChildren => properties.items;
+
   /// Creates a [NavigationBarNode] from a JSON object.
   factory NavigationBarNode.fromJson(Map json) =>
       _$NavigationBarNodeFromJson(json);