packages/wyatt_ui_layout/example/lib/components/custom_bottom_navigation_bar.g.dart

@@ -17,11 +17,15 @@ class $CustomBottomNavigationBarCWProxyImpl
   CustomBottomNavigationBar currentIndex(int? currentIndex) =>
       this(currentIndex: currentIndex);
   @override
+  CustomBottomNavigationBar items(List<BottomNavigationBarItem>? items) =>
+      this(items: items);
+  @override
   CustomBottomNavigationBar key(Key? key) => this(key: key);
   @override
   CustomBottomNavigationBar call({
     void Function(BuildContext, int)? onTap,
     int? currentIndex,
+    List<BottomNavigationBarItem>? items,
     Key? key,
   }) =>
       CustomBottomNavigationBar(

packages/wyatt_ui_layout/example/lib/components/custom_desktop_app_bar.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:wyatt_component_copy_with_extension/wyatt_component_copy_with_extension.dart';
+import 'package:wyatt_ui_components/wyatt_ui_components.dart';
+
+part 'custom_desktop_app_bar.g.dart';
+
+@ComponentCopyWithExtension()
+class CustomDesktopAppBar extends TopAppBarComponent
+    with $CustomDesktopAppBarCWMixin {
+  const CustomDesktopAppBar({
+    super.title,
+    super.key,
+  });
+
+  @override
+  Widget build(BuildContext context) => AppBar(
+        backgroundColor: Colors.green,
+        title: Text(title?.data ?? ''),
+      );
+}

packages/wyatt_ui_layout/example/lib/components/custom_desktop_app_bar.g.dart

@@ -0,0 +1,104 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'custom_desktop_app_bar.dart';
+
+// **************************************************************************
+// ComponentCopyWithGenerator
+// **************************************************************************
+
+class $CustomDesktopAppBarCWProxyImpl implements $TopAppBarComponentCWProxy {
+  const $CustomDesktopAppBarCWProxyImpl(this._value);
+  final CustomDesktopAppBar _value;
+  @override
+  CustomDesktopAppBar title(TextWrapper? title) => this(title: title);
+  @override
+  CustomDesktopAppBar centerTitle(bool? centerTitle) =>
+      this(centerTitle: centerTitle);
+  @override
+  CustomDesktopAppBar shape(ShapeBorder? shape) => this(shape: shape);
+  @override
+  CustomDesktopAppBar systemOverlayStyle(
+          SystemUiOverlayStyle? systemOverlayStyle) =>
+      this(systemOverlayStyle: systemOverlayStyle);
+  @override
+  CustomDesktopAppBar automaticallyImplyLeading(
+          bool? automaticallyImplyLeading) =>
+      this(automaticallyImplyLeading: automaticallyImplyLeading);
+  @override
+  CustomDesktopAppBar flexibleSpace(Widget? flexibleSpace) =>
+      this(flexibleSpace: flexibleSpace);
+  @override
+  CustomDesktopAppBar bottom(PreferredSizeWidget? bottom) =>
+      this(bottom: bottom);
+  @override
+  CustomDesktopAppBar elevation(double? elevation) =>
+      this(elevation: elevation);
+  @override
+  CustomDesktopAppBar scrolledUnderElevation(double? scrolledUnderElevation) =>
+      this(scrolledUnderElevation: scrolledUnderElevation);
+  @override
+  CustomDesktopAppBar shadowColor(Color? shadowColor) =>
+      this(shadowColor: shadowColor);
+  @override
+  CustomDesktopAppBar surfaceTintColor(Color? surfaceTintColor) =>
+      this(surfaceTintColor: surfaceTintColor);
+  @override
+  CustomDesktopAppBar backgroundColor(MultiColor? backgroundColor) =>
+      this(backgroundColor: backgroundColor);
+  @override
+  CustomDesktopAppBar iconTheme(IconThemeData? iconTheme) =>
+      this(iconTheme: iconTheme);
+  @override
+  CustomDesktopAppBar primary(bool? primary) => this(primary: primary);
+  @override
+  CustomDesktopAppBar excludeHeaderSemantics(bool? excludeHeaderSemantics) =>
+      this(excludeHeaderSemantics: excludeHeaderSemantics);
+  @override
+  CustomDesktopAppBar toolbarHeight(double? toolbarHeight) =>
+      this(toolbarHeight: toolbarHeight);
+  @override
+  CustomDesktopAppBar leadingWidth(double? leadingWidth) =>
+      this(leadingWidth: leadingWidth);
+  @override
+  CustomDesktopAppBar leading(Widget? leading) => this(leading: leading);
+  @override
+  CustomDesktopAppBar actions(List<Widget>? actions) => this(actions: actions);
+  @override
+  CustomDesktopAppBar expandedWidget(List<Widget>? expandedWidget) =>
+      this(expandedWidget: expandedWidget);
+  @override
+  CustomDesktopAppBar key(Key? key) => this(key: key);
+  @override
+  CustomDesktopAppBar call({
+    TextWrapper? title,
+    bool? centerTitle,
+    ShapeBorder? shape,
+    SystemUiOverlayStyle? systemOverlayStyle,
+    bool? automaticallyImplyLeading,
+    Widget? flexibleSpace,
+    PreferredSizeWidget? bottom,
+    double? elevation,
+    double? scrolledUnderElevation,
+    Color? shadowColor,
+    Color? surfaceTintColor,
+    MultiColor? backgroundColor,
+    IconThemeData? iconTheme,
+    bool? primary,
+    bool? excludeHeaderSemantics,
+    double? toolbarHeight,
+    double? leadingWidth,
+    Widget? leading,
+    List<Widget>? actions,
+    List<Widget>? expandedWidget,
+    Key? key,
+  }) =>
+      CustomDesktopAppBar(
+        title: title ?? _value.title,
+        key: key ?? _value.key,
+      );
+}
+
+mixin $CustomDesktopAppBarCWMixin on Component {
+  $TopAppBarComponentCWProxy get copyWith =>
+      $CustomDesktopAppBarCWProxyImpl(this as CustomDesktopAppBar);
+}

packages/wyatt_ui_layout/example/lib/components/custom_mobile_app_bar.dart

@@ -3,17 +3,19 @@ import 'package:flutter/services.dart';
 import 'package:wyatt_component_copy_with_extension/wyatt_component_copy_with_extension.dart';
 import 'package:wyatt_ui_components/wyatt_ui_components.dart';
 
-part 'custom_app_bar.g.dart';
+part 'custom_mobile_app_bar.g.dart';
 
 @ComponentCopyWithExtension()
-class CustomAppBar extends TopAppBarComponent with $CustomAppBarCWMixin {
+class CustomMobileAppBar extends TopAppBarComponent
-  const CustomAppBar({
+    with $CustomMobileAppBarCWMixin {
+  const CustomMobileAppBar({
     super.title,
     super.key,
   });
 
   @override
   Widget build(BuildContext context) => AppBar(
+        backgroundColor: Colors.red,
         title: Text(title?.data ?? ''),
       );
 }

packages/wyatt_ui_layout/example/lib/components/custom_mobile_app_bar.g.dart

@@ -0,0 +1,103 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'custom_mobile_app_bar.dart';
+
+// **************************************************************************
+// ComponentCopyWithGenerator
+// **************************************************************************
+
+class $CustomMobileAppBarCWProxyImpl implements $TopAppBarComponentCWProxy {
+  const $CustomMobileAppBarCWProxyImpl(this._value);
+  final CustomMobileAppBar _value;
+  @override
+  CustomMobileAppBar title(TextWrapper? title) => this(title: title);
+  @override
+  CustomMobileAppBar centerTitle(bool? centerTitle) =>
+      this(centerTitle: centerTitle);
+  @override
+  CustomMobileAppBar shape(ShapeBorder? shape) => this(shape: shape);
+  @override
+  CustomMobileAppBar systemOverlayStyle(
+          SystemUiOverlayStyle? systemOverlayStyle) =>
+      this(systemOverlayStyle: systemOverlayStyle);
+  @override
+  CustomMobileAppBar automaticallyImplyLeading(
+          bool? automaticallyImplyLeading) =>
+      this(automaticallyImplyLeading: automaticallyImplyLeading);
+  @override
+  CustomMobileAppBar flexibleSpace(Widget? flexibleSpace) =>
+      this(flexibleSpace: flexibleSpace);
+  @override
+  CustomMobileAppBar bottom(PreferredSizeWidget? bottom) =>
+      this(bottom: bottom);
+  @override
+  CustomMobileAppBar elevation(double? elevation) => this(elevation: elevation);
+  @override
+  CustomMobileAppBar scrolledUnderElevation(double? scrolledUnderElevation) =>
+      this(scrolledUnderElevation: scrolledUnderElevation);
+  @override
+  CustomMobileAppBar shadowColor(Color? shadowColor) =>
+      this(shadowColor: shadowColor);
+  @override
+  CustomMobileAppBar surfaceTintColor(Color? surfaceTintColor) =>
+      this(surfaceTintColor: surfaceTintColor);
+  @override
+  CustomMobileAppBar backgroundColor(MultiColor? backgroundColor) =>
+      this(backgroundColor: backgroundColor);
+  @override
+  CustomMobileAppBar iconTheme(IconThemeData? iconTheme) =>
+      this(iconTheme: iconTheme);
+  @override
+  CustomMobileAppBar primary(bool? primary) => this(primary: primary);
+  @override
+  CustomMobileAppBar excludeHeaderSemantics(bool? excludeHeaderSemantics) =>
+      this(excludeHeaderSemantics: excludeHeaderSemantics);
+  @override
+  CustomMobileAppBar toolbarHeight(double? toolbarHeight) =>
+      this(toolbarHeight: toolbarHeight);
+  @override
+  CustomMobileAppBar leadingWidth(double? leadingWidth) =>
+      this(leadingWidth: leadingWidth);
+  @override
+  CustomMobileAppBar leading(Widget? leading) => this(leading: leading);
+  @override
+  CustomMobileAppBar actions(List<Widget>? actions) => this(actions: actions);
+  @override
+  CustomMobileAppBar expandedWidget(List<Widget>? expandedWidget) =>
+      this(expandedWidget: expandedWidget);
+  @override
+  CustomMobileAppBar key(Key? key) => this(key: key);
+  @override
+  CustomMobileAppBar call({
+    TextWrapper? title,
+    bool? centerTitle,
+    ShapeBorder? shape,
+    SystemUiOverlayStyle? systemOverlayStyle,
+    bool? automaticallyImplyLeading,
+    Widget? flexibleSpace,
+    PreferredSizeWidget? bottom,
+    double? elevation,
+    double? scrolledUnderElevation,
+    Color? shadowColor,
+    Color? surfaceTintColor,
+    MultiColor? backgroundColor,
+    IconThemeData? iconTheme,
+    bool? primary,
+    bool? excludeHeaderSemantics,
+    double? toolbarHeight,
+    double? leadingWidth,
+    Widget? leading,
+    List<Widget>? actions,
+    List<Widget>? expandedWidget,
+    Key? key,
+  }) =>
+      CustomMobileAppBar(
+        title: title ?? _value.title,
+        key: key ?? _value.key,
+      );
+}
+
+mixin $CustomMobileAppBarCWMixin on Component {
+  $TopAppBarComponentCWProxy get copyWith =>
+      $CustomMobileAppBarCWProxyImpl(this as CustomMobileAppBar);
+}

packages/wyatt_ui_layout/example/lib/core/app_theme_component.dart

@@ -1,14 +1,18 @@
 import 'package:flutter/material.dart';
 import 'package:wyatt_ui_components/wyatt_ui_components.dart';
-import 'package:wyatt_ui_layout_example/components/custom_app_bar.dart';
 import 'package:wyatt_ui_layout_example/components/custom_bottom_navigation_bar.dart';
+import 'package:wyatt_ui_layout_example/components/custom_desktop_app_bar.dart';
+import 'package:wyatt_ui_layout_example/components/custom_mobile_app_bar.dart';
 import 'package:wyatt_ui_layout_example/pages/bottom_navigation_bar_layout_page_1.dart';
 import 'package:wyatt_ui_layout_example/pages/bottom_navigation_bar_layout_page_2.dart';
 
 class AppThemeComponent {
   static ComponentThemeData get components => ComponentThemeData.raw(
-        topAppBar: const CustomAppBar(),
+        topAppBars: {
-        bottomNavigationBar: CustomBottomNavigationBar(
+          'mobile': const CustomMobileAppBar(),
+          'desktop': const CustomDesktopAppBar(),
+        }.registry(),
+        bottomNavigationBars: CustomBottomNavigationBar(
           onTap: (context, index) {
             switch (index) {
               case 0:
@@ -37,6 +41,6 @@ class AppThemeComponent {
                 break;
             }
           },
-        ),
+        ).registry(),
       );
 }

packages/wyatt_ui_layout/example/lib/pages/app_bar_layout_page.dart

@@ -6,7 +6,9 @@ class AppBarLayoutPage extends StatelessWidget {
   const AppBarLayoutPage({super.key});
 
   @override
-  Widget build(BuildContext context) => TopAppBarLayout(
+  Widget build(BuildContext context) => LayoutBuilder(
+        builder: (context, constraint) => StructuralLayout.withTopAppBar(
+          barId: constraint.maxWidth < 600 ? 'mobile' : 'desktop',
           custom: (topBar) =>
               topBar?.copyWith.title(const TextWrapper('New Title')),
           body: const Center(
@@ -14,5 +16,6 @@ class AppBarLayoutPage extends StatelessWidget {
               'Body',
             ),
           ),
+        ),
       );
 }

packages/wyatt_ui_layout/example/lib/pages/bottom_navigation_bar_layout_page_1.dart

@@ -5,7 +5,7 @@ class BottomNavigationBarLayoutPage1 extends StatelessWidget {
   const BottomNavigationBarLayoutPage1({super.key});
 
   @override
-  Widget build(BuildContext context) => BottomNavigationBarLayout(
+  Widget build(BuildContext context) => StructuralLayout.withBottomNavBar(
         custom: (p0) => p0?.copyWith.call(currentIndex: 0),
         body: const TopAppBarLayout(
           body: Center(

packages/wyatt_ui_layout/example/lib/pages/bottom_navigation_bar_layout_page_2.dart

@@ -5,7 +5,7 @@ class BottomNavigationBarLayoutPage2 extends StatelessWidget {
   const BottomNavigationBarLayoutPage2({super.key});
 
   @override
-  Widget build(BuildContext context) => BottomNavigationBarLayout(
+  Widget build(BuildContext context) => StructuralLayout.withBottomNavBar(
         custom: (p0) => p0?.copyWith.currentIndex(1),
         body: const TopAppBarLayout(
           body: Center(

packages/wyatt_ui_layout/example/macos/Flutter/ephemeral/Flutter-Generated.xcconfig

@@ -2,10 +2,12 @@
 FLUTTER_ROOT=/Users/maloleon/Library/flutter
 FLUTTER_APPLICATION_PATH=/Users/maloleon/Studio/wyatt-packages/packages/wyatt_ui_layout/example
 COCOAPODS_PARALLEL_CODE_SIGN=true
+FLUTTER_TARGET=/Users/maloleon/Studio/wyatt-packages/packages/wyatt_ui_layout/example/lib/main.dart
 FLUTTER_BUILD_DIR=build
 FLUTTER_BUILD_NAME=1.0.0
 FLUTTER_BUILD_NUMBER=1
+DART_DEFINES=RkxVVFRFUl9XRUJfQVVUT19ERVRFQ1Q9dHJ1ZQ==,RkxVVFRFUl9XRUJfQ0FOVkFTS0lUX1VSTD1odHRwczovL3d3dy5nc3RhdGljLmNvbS9mbHV0dGVyLWNhbnZhc2tpdC9iMjAxODNlMDQwOTYwOTRiY2MzN2Q5Y2RlMmE0Yjk2ZjVjYzY4NGNmLw==
 DART_OBFUSCATION=false
 TRACK_WIDGET_CREATION=true
 TREE_SHAKE_ICONS=false
-PACKAGE_CONFIG=.dart_tool/package_config.json
+PACKAGE_CONFIG=/Users/maloleon/Studio/wyatt-packages/packages/wyatt_ui_layout/example/.dart_tool/package_config.json

packages/wyatt_ui_layout/example/macos/Flutter/ephemeral/flutter_export_environment.sh

@@ -3,10 +3,12 @@
 export "FLUTTER_ROOT=/Users/maloleon/Library/flutter"
 export "FLUTTER_APPLICATION_PATH=/Users/maloleon/Studio/wyatt-packages/packages/wyatt_ui_layout/example"
 export "COCOAPODS_PARALLEL_CODE_SIGN=true"
+export "FLUTTER_TARGET=/Users/maloleon/Studio/wyatt-packages/packages/wyatt_ui_layout/example/lib/main.dart"
 export "FLUTTER_BUILD_DIR=build"
 export "FLUTTER_BUILD_NAME=1.0.0"
 export "FLUTTER_BUILD_NUMBER=1"
+export "DART_DEFINES=RkxVVFRFUl9XRUJfQVVUT19ERVRFQ1Q9dHJ1ZQ==,RkxVVFRFUl9XRUJfQ0FOVkFTS0lUX1VSTD1odHRwczovL3d3dy5nc3RhdGljLmNvbS9mbHV0dGVyLWNhbnZhc2tpdC9iMjAxODNlMDQwOTYwOTRiY2MzN2Q5Y2RlMmE0Yjk2ZjVjYzY4NGNmLw=="
 export "DART_OBFUSCATION=false"
 export "TRACK_WIDGET_CREATION=true"
 export "TREE_SHAKE_ICONS=false"
-export "PACKAGE_CONFIG=.dart_tool/package_config.json"
+export "PACKAGE_CONFIG=/Users/maloleon/Studio/wyatt-packages/packages/wyatt_ui_layout/example/.dart_tool/package_config.json"

packages/wyatt_ui_layout/example/macos/Runner.xcodeproj/project.pbxproj

@@ -182,7 +182,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0920;
-				LastUpgradeCheck = 1300;
+				LastUpgradeCheck = 1430;
 				ORGANIZATIONNAME = "";
 				TargetAttributes = {
 					33CC10EC2044A3C60003C045 = {

packages/wyatt_ui_layout/example/macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1300"
+   LastUpgradeVersion = "1430"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

packages/wyatt_ui_layout/example/pubspec.yaml

@@ -18,7 +18,7 @@ publish_to: "none" # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions

packages/wyatt_ui_layout/lib/src/presentation/layouts/content_layouts/content_layout.dart

@@ -0,0 +1,39 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:flutter/material.dart';
+import 'package:wyatt_ui_layout/src/presentation/layouts/layout.dart';
+import 'package:wyatt_ui_layout/wyatt_ui_layout.dart';
+
+/// {@template content_layout}
+/// An abstract class that provides a base for creating custom content layout
+/// widgets.
+/// {@endtemplate}
+abstract class ContentLayout extends Layout {
+  /// {@macro content_layout}
+  const ContentLayout({super.key});
+
+  factory ContentLayout.withGrid({
+    required List<Widget> children,
+    double verticalGap = 30,
+    double horizontalGap = 30,
+  }) =>
+      GridLayout(
+        verticalGap: verticalGap,
+        horizontalGap: horizontalGap,
+        children: children,
+      );
+}

packages/wyatt_ui_layout/lib/src/presentation/layouts/content_layouts/content_layouts.dart

@@ -14,4 +14,5 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
+export './content_layout.dart';
 export './grid_layout.dart';

packages/wyatt_ui_layout/lib/src/presentation/layouts/content_layouts/grid_layout.dart

@@ -16,7 +16,7 @@
 
 import 'package:flutter/material.dart';
 import 'package:gap/gap.dart';
-import 'package:wyatt_ui_layout/src/presentation/layouts/layout.dart';
+import 'package:wyatt_ui_layout/src/presentation/layouts/content_layouts/content_layout.dart';
 
 /// {@template grid_layout}
 /// A concrete implementation of the [ContentLayout] abstract class for a layout

packages/wyatt_ui_layout/lib/src/presentation/layouts/layout.dart

@@ -28,21 +28,3 @@ abstract class Layout extends StatelessWidget {
   /// {@macro layout}
   const Layout({super.key});
 }
-
-/// {@template structural_layout}
-/// An abstract class that provides a base for creating custom structural layout
-/// widgets.
-/// {@endtemplate}
-abstract class StructuralLayout extends Layout {
-  /// {@macro structural_layout}
-  const StructuralLayout({super.key});
-}
-
-/// {@template content_layout}
-/// An abstract class that provides a base for creating custom content layout
-/// widgets.
-/// {@endtemplate}
-abstract class ContentLayout extends Layout {
-  /// {@macro content_layout}
-  const ContentLayout({super.key});
-}

packages/wyatt_ui_layout/lib/src/presentation/layouts/structural_layouts/bottom_navigation_bar_layout.dart

@@ -19,6 +19,7 @@ import 'package:flutter/material.dart';
 import 'package:wyatt_ui_components/wyatt_ui_components.dart';
 import 'package:wyatt_ui_layout/src/core/scaffold_fields_wrapper.dart';
 import 'package:wyatt_ui_layout/src/presentation/layouts/layout.dart';
+import 'package:wyatt_ui_layout/src/presentation/layouts/structural_layouts/structural_layout.dart';
 
 /// {@template bottom_navigation_bar_layout}
 /// A concrete implementation of the [Layout] abstract class for a layout which
@@ -29,6 +30,7 @@ class BottomNavigationBarLayout extends StructuralLayout {
   const BottomNavigationBarLayout({
     required this.body,
     this.custom,
+    this.barId,
     this.scaffoldFieldsWrapper,
     super.key,
   });
@@ -41,15 +43,23 @@ class BottomNavigationBarLayout extends StructuralLayout {
   final BottomNavigationBarComponent? Function(BottomNavigationBarComponent?)?
       custom;
 
+  /// The parameter [barId] enables to specify the particular
+  /// bottom bar to utilize.
+  final String? barId;
+
+  /// The [scaffoldFieldsWrapper] is a final variable that serves as a wrapper
+  /// for customizing the scaffold.
+  /// It allows for tailored modifications and enhancements to the standard
+  /// scaffold functionality.
   final ScaffoldFieldsWrapper? scaffoldFieldsWrapper;
 
   @override
   Widget build(BuildContext context) => Scaffold(
         body: body,
         bottomNavigationBar: custom?.call(
-              context.components.bottomNavigationBar,
+              context.components.bottomNavigationBarComponent(barId).call(),
             ) ??
-            context.components.bottomNavigationBar,
+            context.components.bottomNavigationBarComponent(barId).call(),
         floatingActionButtonLocation:
             scaffoldFieldsWrapper?.floatingActionButtonLocation,
         floatingActionButtonAnimator:

packages/wyatt_ui_layout/lib/src/presentation/layouts/structural_layouts/frame_layout.dart

@@ -18,7 +18,7 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:wyatt_ui_components/wyatt_ui_components.dart';
 import 'package:wyatt_ui_layout/src/core/scaffold_fields_wrapper.dart';
-import 'package:wyatt_ui_layout/src/presentation/layouts/layout.dart';
+import 'package:wyatt_ui_layout/src/presentation/layouts/structural_layouts/structural_layout.dart';
 
 /// {@template frame_layout}
 /// A layout that contains a top app bar, a body and a bottom navigation bar.
@@ -36,6 +36,9 @@ class FrameLayout extends StructuralLayout {
     this.customAppBar,
     this.customBottomNavBar,
     this.customFloatingActionButton,
+    this.appBarId,
+    this.bottomNavBarId,
+    this.floatingActionButtonId,
     this.height = 60,
     this.scaffoldFieldsWrapper,
     super.key,
@@ -53,6 +56,18 @@ class FrameLayout extends StructuralLayout {
   final FloatingActionButtonComponent? Function(FloatingActionButtonComponent?)?
       customFloatingActionButton;
 
+  /// The parameter [appBarId] enables to specify the particular
+  /// app bar to utilize.
+  final String? appBarId;
+
+  /// The parameter [bottomNavBarId] enables to specify the particular
+  /// bottom bar to utilize.
+  final String? bottomNavBarId;
+
+  /// The parameter [floatingActionButtonId] enables to specify
+  /// the particular floating action button to utilize.
+  final String? floatingActionButtonId;
+
   /// The main content of the layout.
   final Widget body;
 
@@ -63,20 +78,27 @@ class FrameLayout extends StructuralLayout {
 
   @override
   Widget build(BuildContext context) => Scaffold(
-        appBar: (customAppBar?.call(context.components.topAppBar) != null ||
+        appBar: (customAppBar
-                context.components.topAppBar != null)
+                    ?.call(context.components.topAppBarComponent(appBarId)()) !=
+                null)
             ? PreferredSize(
                 preferredSize: Size.fromHeight(height),
-                child: customAppBar?.call(context.components.topAppBar) ??
+                child: customAppBar?.call(
-                    context.components.topAppBar!,
+                      context.components.topAppBarComponent(appBarId)(),
+                    ) ??
+                    context.components.topAppBarComponent(appBarId)(),
               )
             : null,
-        floatingActionButton: customFloatingActionButton
+        floatingActionButton: customFloatingActionButton?.call(
-                ?.call(context.components.floatingActionButton) ??
+              context.components
-            context.components.floatingActionButton,
+                  .floatingActionButtonComponent(floatingActionButtonId)(),
-        bottomNavigationBar:
+            ) ??
-            customBottomNavBar?.call(context.components.bottomNavigationBar) ??
+            context.components
-                context.components.bottomNavigationBar,
+                .floatingActionButtonComponent(floatingActionButtonId)(),
+        bottomNavigationBar: customBottomNavBar?.call(
+              context.components.bottomNavigationBarComponent(bottomNavBarId)(),
+            ) ??
+            context.components.bottomNavigationBarComponent(bottomNavBarId)(),
         body: body,
         floatingActionButtonLocation:
             scaffoldFieldsWrapper?.floatingActionButtonLocation,

packages/wyatt_ui_layout/lib/src/presentation/layouts/structural_layouts/structural_layout.dart

@@ -0,0 +1,99 @@
+// Copyright (C) 2022 WYATT GROUP
+// Please see the AUTHORS file for details.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+import 'package:flutter/widgets.dart';
+import 'package:wyatt_ui_components/wyatt_ui_components.dart';
+import 'package:wyatt_ui_layout/src/presentation/layouts/layout.dart';
+import 'package:wyatt_ui_layout/wyatt_ui_layout.dart';
+
+typedef ComponentCallBack<T extends Component> = T? Function(T? component);
+
+/// {@template structural_layout}
+/// An abstract class that provides a base for creating custom structural layout
+/// widgets.
+/// {@endtemplate}
+abstract class StructuralLayout extends Layout {
+  /// {@macro structural_layout}
+  const StructuralLayout({super.key});
+
+  factory StructuralLayout.withTopAppBar({
+    required Widget body,
+    ComponentCallBack<TopAppBarComponent>? custom,
+    String? barId,
+    double height = 60,
+    ScaffoldFieldsWrapper? scaffoldFieldsWrapper,
+  }) =>
+      TopAppBarLayout(
+        body: body,
+        barId: barId,
+        custom: custom,
+        height: height,
+        scaffoldFieldsWrapper: scaffoldFieldsWrapper,
+      );
+
+  factory StructuralLayout.withTopNavigationBar({
+    required Widget body,
+    ComponentCallBack<TopNavigationBarComponent>? custom,
+    String? barId,
+    double height = 60,
+    ScaffoldFieldsWrapper? scaffoldFieldsWrapper,
+  }) =>
+      TopNavigationBarLayout(
+        body: body,
+        barId: barId,
+        custom: custom,
+        height: height,
+        scaffoldFieldsWrapper: scaffoldFieldsWrapper,
+      );
+
+  factory StructuralLayout.withFrame({
+    required Widget body,
+    ComponentCallBack<TopAppBarComponent>? customAppBar,
+    ComponentCallBack<BottomNavigationBarComponent>? customBottomNavBar,
+    ComponentCallBack<FloatingActionButtonComponent>?
+        customFloatingActionButton,
+    String? appBarId,
+    String? bottomNavBarId,
+    String? floatingActionButtonId,
+    double height = 60,
+    ScaffoldFieldsWrapper? scaffoldFieldsWrapper,
+  }) =>
+      FrameLayout(
+        body: body,
+        customAppBar: customAppBar,
+        customBottomNavBar: customBottomNavBar,
+        customFloatingActionButton: customFloatingActionButton,
+        appBarId: appBarId,
+        bottomNavBarId: bottomNavBarId,
+        floatingActionButtonId: floatingActionButtonId,
+        height: height,
+        scaffoldFieldsWrapper: scaffoldFieldsWrapper,
+      );
+
+  factory StructuralLayout.withBottomNavBar({
+    required Widget? body,
+    BottomNavigationBarComponent? Function(BottomNavigationBarComponent?)?
+        custom,
+    String? barId,
+    ScaffoldFieldsWrapper? scaffoldFieldsWrapper,
+  }) =>
+      BottomNavigationBarLayout(
+        body: body,
+        custom: custom,
+        barId: barId,
+        scaffoldFieldsWrapper: scaffoldFieldsWrapper,
+      );
+}

packages/wyatt_ui_layout/lib/src/presentation/layouts/structural_layouts/structural_layouts.dart

@@ -16,4 +16,5 @@
 
 export './bottom_navigation_bar_layout.dart';
 export './frame_layout.dart';
+export './structural_layout.dart';
 export './top_app_bar_layout.dart';

packages/wyatt_ui_layout/lib/src/presentation/layouts/structural_layouts/top_app_bar_layout.dart

@@ -18,7 +18,7 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:wyatt_ui_components/wyatt_ui_components.dart';
 import 'package:wyatt_ui_layout/src/core/scaffold_fields_wrapper.dart';
-import 'package:wyatt_ui_layout/src/presentation/layouts/layout.dart';
+import 'package:wyatt_ui_layout/src/presentation/layouts/structural_layouts/structural_layout.dart';
 
 /// {@template top_bar_layout}
 /// An abstract class for creating layouts with a top bar component.
@@ -27,7 +27,7 @@ import 'package:wyatt_ui_layout/src/presentation/layouts/layout.dart';
 /// component, such as an app bar or navigation bar.
 ///
 /// Implementations of this class must provide a concrete implementation of
-/// the [child] method, which returns the specific top bar component for the
+/// the [appBar] method, which returns the specific top bar component for the
 /// given [BuildContext].
 ///
 /// [T] represents the type of the top bar component.
@@ -38,6 +38,7 @@ abstract class TopBarLayout<T extends TopBarComponent>
   const TopBarLayout({
     required this.body,
     this.custom,
+    this.barId,
     this.height = 60,
     this.scaffoldFieldsWrapper,
     super.key,
@@ -51,20 +52,31 @@ abstract class TopBarLayout<T extends TopBarComponent>
   /// a customized top bar component.
   final T? Function(T?)? custom;
 
+  /// The parameter [barId] enables to specify the particular app bar to use.
+  final String? barId;
+
   /// The height of the top bar.
   final double height;
 
   /// Returns the top bar component for the given [BuildContext].
-  T? child(BuildContext context);
+  T appBar(BuildContext context, String? barId);
 
+  /// The [scaffoldFieldsWrapper] is a final variable that serves as a wrapper
+  /// for customizing the scaffold.
+  /// It allows for tailored modifications and enhancements to the standard
+  /// scaffold functionality.
   final ScaffoldFieldsWrapper? scaffoldFieldsWrapper;
 
   @override
   Widget build(BuildContext context) => Scaffold(
-        appBar: (custom?.call(child(context)) != null || child(context) != null)
+        appBar: (custom?.call(
+                  appBar(context, barId),
+                ) !=
+                null)
             ? PreferredSize(
                 preferredSize: Size.fromHeight(height),
-                child: custom?.call(child(context)) ?? child(context)!,
+                child: custom?.call(appBar(context, barId)) ??
+                    appBar(context, barId),
               )
             : null,
         body: body,
@@ -111,14 +123,16 @@ class TopAppBarLayout extends TopBarLayout<TopAppBarComponent> {
   /// [height] represents the height of the top bar.
   const TopAppBarLayout({
     required super.body,
+    super.barId,
     super.custom,
     super.height,
+    super.scaffoldFieldsWrapper,
     super.key,
   });
 
   @override
-  TopAppBarComponent? child(BuildContext context) =>
+  TopAppBarComponent appBar(BuildContext context, String? barId) =>
-      context.components.topAppBar;
+      context.components.topAppBarComponent(barId).call();
 }
 
 /// A concrete implementation of [TopBarLayout] for a navigation bar.
@@ -131,12 +145,14 @@ class TopNavigationBarLayout extends TopBarLayout<TopNavigationBarComponent> {
   /// [height] represents the height of the top bar.
   const TopNavigationBarLayout({
     required super.body,
+    super.barId,
     super.custom,
     super.height,
+    super.scaffoldFieldsWrapper,
     super.key,
   });
 
   @override
-  TopNavigationBarComponent? child(BuildContext context) =>
+  TopNavigationBarComponent appBar(BuildContext context, String? barId) =>
-      context.components.topNavigationBar;
+      context.components.topNavigationBarComponent(barId).call();
 }

packages/wyatt_ui_layout/pubspec.yaml

@@ -6,7 +6,7 @@ version: 0.1.1
 publish_to: https://git.wyatt-studio.fr/api/packages/Wyatt-FOSS/pub
 
 environment:
-  sdk: ">=2.17.0 <3.0.0"
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
   flutter: { sdk: flutter }