Restore old feel & look with supprt Material 3

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

@@ -1,5 +1,8 @@
 import 'package:flutter/material.dart';
 
+import '../../../../extensions.dart';
+import '../../../../flutter_quill.dart';
+
 class QuillToolbarIconButton extends StatelessWidget {
   const QuillToolbarIconButton({
     required this.onPressed,
@@ -11,6 +14,8 @@ class QuillToolbarIconButton extends StatelessWidget {
     super.key,
     this.iconFilledStyle,
     this.iconStyle,
+    this.size = 40,
+    this.iconTheme,
   });
 
   final VoidCallback? onPressed;
@@ -20,27 +25,56 @@ class QuillToolbarIconButton extends StatelessWidget {
   final String? tooltip;
   final EdgeInsets? padding;
   final bool isFilled;
-
   final ButtonStyle? iconStyle;
   final ButtonStyle? iconFilledStyle;
+  final QuillIconTheme? iconTheme;
+
+  /// Container size.
+  final double size;
+
   @override
   Widget build(BuildContext context) {
-    if (isFilled) {
-      return IconButton.filled(
-        padding: padding,
-        onPressed: onPressed,
-        icon: icon,
-        style: iconStyle,
+    final theme = Theme.of(context);
+    Widget child;
+    if (theme.useMaterial3) {
+      child = isFilled
+          ? IconButton.filled(
+              padding: padding,
+              icon: icon,
+              style: iconFilledStyle,
+              onPressed: _onPressed,
+            )
+          : IconButton(
+              padding: padding,
+              icon: icon,
+              style: iconStyle,
+              onPressed: _onPressed,
+            );
+    } else {
+      child = UtilityWidgets.maybeTooltip(
+        message: tooltip,
+        child: RawMaterialButton(
+          visualDensity: VisualDensity.compact,
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(iconTheme?.borderRadius ?? 2),
+          ),
+          fillColor: iconFilledStyle?.backgroundColor?.resolve({}),
+          elevation: 0,
+          hoverElevation: 0,
+          highlightElevation: 0,
+          onPressed: _onPressed,
+          child: icon,
+        ),
       );
     }
-    return IconButton(
-      padding: padding,
-      onPressed: () {
-        onPressed?.call();
-        afterPressed?.call();
-      },
-      icon: icon,
-      style: iconFilledStyle,
+    return ConstrainedBox(
+      constraints: BoxConstraints.tightFor(width: size, height: size),
+      child: child,
     );
   }
+
+  void _onPressed() {
+    onPressed?.call();
+    afterPressed?.call();
+  }
 }