toolbar add multi-line display #229

Add a parameter to Toolbar, it supports multi-line display

lib/widgets/toolbar.dart

@@ -909,9 +909,12 @@ class _ClearFormatButtonState extends State<ClearFormatButton> {
 }
 
 class QuillToolbar extends StatefulWidget implements PreferredSizeWidget {
-  const QuillToolbar(
+  const QuillToolbar({
-      {required this.children, this.toolBarHeight = 36, Key? key})
+    required this.children,
-      : super(key: key);
+    this.toolBarHeight = 36,
+    Key? key,
+    this.multiRowsDisplay = false,
+  }) : super(key: key);
 
   factory QuillToolbar.basic({
     required QuillController controller,
@@ -935,12 +938,14 @@ class QuillToolbar extends StatefulWidget implements PreferredSizeWidget {
     bool showHorizontalRule = false,
     OnImagePickCallback? onImagePickCallback,
     Key? key,
+    bool multiRowsDisplay = false,
   }) {
     controller.iconSize = toolbarIconSize;
 
     return QuillToolbar(
         key: key,
         toolBarHeight: toolbarIconSize * controller.toolbarHeightFactor,
+        multiRowsDisplay: multiRowsDisplay,
         children: [
           Visibility(
             visible: showHistory,
@@ -1131,6 +1136,7 @@ class QuillToolbar extends StatefulWidget implements PreferredSizeWidget {
 
   final List<Widget> children;
   final double toolBarHeight;
+  final bool multiRowsDisplay;
 
   @override
   _QuillToolbarState createState() => _QuillToolbarState();
@@ -1142,9 +1148,18 @@ class QuillToolbar extends StatefulWidget implements PreferredSizeWidget {
 class _QuillToolbarState extends State<QuillToolbar> {
   @override
   Widget build(BuildContext context) {
-    return Container(
+    return widget.multiRowsDisplay
+        ? Container(
+            color: Theme.of(context).canvasColor,
+            child: Wrap(
+              alignment: WrapAlignment.center,
+              children: widget.children,
+            ),
+          )
+        : Container(
             padding: const EdgeInsets.symmetric(horizontal: 8),
-      constraints: BoxConstraints.tightFor(height: widget.preferredSize.height),
+            constraints:
+                BoxConstraints.tightFor(height: widget.preferredSize.height),
             color: Theme.of(context).canvasColor,
             child: CustomScrollView(
               scrollDirection: Axis.horizontal,