Update the example + Few more changes

example/lib/pages/home_page.dart

@@ -457,9 +457,15 @@ class _HomePageState extends State<HomePage> {
   }
 
   QuillToolbar get quillToolbar {
+    final customButtons = [
+      const QuillToolbarCustomButtonOptions(
+        icon: Icon(Icons.add),
+      ),
+    ];
     if (kIsWeb) {
       return QuillToolbar(
         configurations: QuillToolbarConfigurations(
+          customButtons: customButtons,
           embedButtons: FlutterQuillEmbeds.toolbarButtons(
             imageButtonOptions: QuillToolbarImageButtonOptions(
               imageButtonConfigurations: QuillToolbarImageConfigurations(
@@ -482,6 +488,7 @@ class _HomePageState extends State<HomePage> {
     if (isDesktop()) {
       return QuillToolbar(
         configurations: QuillToolbarConfigurations(
+          customButtons: customButtons,
           embedButtons: FlutterQuillEmbeds.toolbarButtons(
             imageButtonOptions: QuillToolbarImageButtonOptions(
               imageButtonConfigurations: QuillToolbarImageConfigurations(
@@ -502,6 +509,7 @@ class _HomePageState extends State<HomePage> {
     }
     return QuillToolbar(
       configurations: QuillToolbarConfigurations(
+        customButtons: customButtons,
         embedButtons: FlutterQuillEmbeds.toolbarButtons(
           videoButtonOptions: QuillToolbarVideoButtonOptions(
             videoConfigurations: QuillToolbarVideoConfigurations(

lib/src/models/config/toolbar/base_configurations.dart

@@ -40,7 +40,7 @@ class QuillBaseToolbarConfigurations extends Equatable {
   final Color? color;
 
   /// List of custom buttons
-  final List<QuillToolbarCustomButton> customButtons;
+  final List<QuillToolbarCustomButtonOptions> customButtons;
 
   /// The color to use when painting the toolbar section divider.
   ///

lib/src/models/config/toolbar/configurations.dart

@@ -2,9 +2,8 @@ import 'package:equatable/equatable.dart';
 import 'package:flutter/foundation.dart' show immutable;
 import 'package:flutter/widgets.dart'
     show Axis, Color, Decoration, Widget, WrapAlignment, WrapCrossAlignment;
-import '../../../widgets/embeds.dart';
 
-import '../../../widgets/toolbar/buttons/custom_button.dart';
+import '../../../widgets/embeds.dart';
 import '../../structs/link_dialog_action.dart';
 import '../../themes/quill_dialog_theme.dart';
 import '../../themes/quill_icon_theme.dart';
@@ -27,6 +26,7 @@ export './../../../widgets/toolbar/buttons/search/search_dialog.dart';
 export './buttons/base.dart';
 export './buttons/clear_format.dart';
 export './buttons/color.dart';
+export './buttons/custom_button.dart';
 export './buttons/font_family.dart';
 export './buttons/font_size.dart';
 export './buttons/history.dart';
@@ -212,7 +212,7 @@ class QuillToolbarConfigurations extends Equatable {
   final bool showSearchButton;
   final bool showSubscript;
   final bool showSuperscript;
-  final List<QuillToolbarCustomButton> customButtons;
+  final List<QuillToolbarCustomButtonOptions> customButtons;
 
   /// The decoration to use for the toolbar.
   final Decoration? decoration;

lib/src/widgets/toolbar/buttons/custom_button.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 
-import '../../../models/config/toolbar/buttons/custom_button.dart';
 import '../../../models/themes/quill_icon_theme.dart';
 import '../../../utils/extensions/build_context.dart';
 import '../../controller.dart';

lib/src/widgets/toolbar/toolbar.dart

@@ -411,7 +411,10 @@ class QuillToolbar extends StatelessWidget {
                     space: configurations.sectionDividerSpace,
                   ),
                 for (final customButton in configurations.customButtons)
-                  customButton,
+                  QuillToolbarCustomButton(
+                    options: customButton,
+                    controller: customButton.controller ?? globalController,
+                  ),
                 // if (customButton.child != null) ...[
                 //   InkWell(
                 //     onTap: customButton.onTap,

test/bug_fix_test.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_quill/flutter_quill.dart';
-import 'package:flutter_quill/src/models/config/toolbar/buttons/custom_button.dart';
 import 'package:flutter_quill_test/flutter_quill_test.dart';
 import 'package:flutter_test/flutter_test.dart';
 
@@ -21,16 +20,13 @@ void main() {
               configurations: QuillConfigurations(
                 controller: controller,
               ),
-              child: QuillToolbar(
+              child: const QuillToolbar(
                 configurations: QuillToolbarConfigurations(
                   showRedo: false,
                   customButtons: [
-                    QuillToolbarCustomButton(
-                      options: const QuillToolbarCustomButtonOptions(
+                    QuillToolbarCustomButtonOptions(
                       tooltip: tooltip,
-                      ),
-                      controller: controller,
-                    ),
+                    )
                   ],
                 ),
               ),