Fix bug with font size button

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 All notable changes to this project will be documented in this file.
 
+## 9.2.1
+* Fix [bug](https://github.com/singerdmx/flutter-quill/issues/1119#issuecomment-1872605246) with font size button
+
 ## 9.2.0
 * Require minimum version `6.0.0` of `flutter_keyboard_visibility` to fix some build issues with Android Gradle Plugin 8.2.0
 * Add on image clicked in `flutter_quill_extensions` callback

example/lib/screens/quill/my_quill_toolbar.dart

@@ -209,6 +209,19 @@ class MyQuillToolbar extends StatelessWidget {
               'Formal': GoogleFonts.petitFormalScript().fontFamily!,
               'Roboto': GoogleFonts.roboto().fontFamily!
             },
+            fontSizesValues: const {
+              '14': '14.0',
+              '16': '16.0',
+              '18': '18.0',
+              '20': '20.0',
+              '22': '22.0',
+              '24': '24.0',
+              '26': '26.0',
+              '28': '28.0',
+              '30': '30.0',
+              '35': '35.0',
+              '40': '40.0'
+            },
             buttonOptions: QuillSimpleToolbarButtonOptions(
               base: QuillToolbarBaseButtonOptions(
                 afterButtonPressed: focusNode.requestFocus,

lib/src/widgets/quill/quill_controller.dart

@@ -81,12 +81,12 @@ class QuillController extends ChangeNotifier {
   }
 
   /// The current font size, null to use the default one
-  String? _selectedFontSize;
+  MapEntry<String, String>? _selectedFontSize;
 
   /// The current font size, null to use the default one
-  String? get selectedFontSize => _selectedFontSize;
+  MapEntry<String, String>? get selectedFontSize => _selectedFontSize;
 
-  void selectFontSize(String? newFontSize) {
+  void selectFontSize(MapEntry<String, String>? newFontSize) {
     _selectedFontSize = newFontSize;
   }
 

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

@@ -181,7 +181,7 @@ class QuillToolbarFontSizeButtonState
               controller.selectFontSize(null);
               return;
             }
-            controller.selectFontSize(fontSize.value);
+            controller.selectFontSize(fontSize);
           },
           child: Text(
             fontSize.key.toString(),
@@ -231,7 +231,7 @@ class QuillToolbarFontSizeButtonState
             enabled: hasFinalWidth,
             wrapper: (child) => Expanded(child: child),
             child: Text(
-              getLabel(widget.controller.selectedFontSize) ??
+              getLabel(widget.controller.selectedFontSize?.key) ??
                   getLabel(_currentValue) ??
                   '',
               overflow: options.labelOverflow,