Add auto layout

Author: Masadow

lib/src/form_builder_field.dart

@@ -2,7 +2,7 @@ import 'package:flutter/widgets.dart';
 import 'package:flutter_form_builder/flutter_form_builder.dart';
 import 'package:flutter_form_builder/src/extensions/autovalidatemode_extension.dart';
 
-enum OptionsOrientation { horizontal, vertical, wrap }
+enum OptionsOrientation { horizontal, vertical, wrap, auto }
 
 enum ControlAffinity { leading, trailing }
 

lib/src/widgets/grouped_checkbox.dart

@@ -224,7 +224,12 @@ class GroupedCheckbox<T> extends StatelessWidget {
       widgetList.add(buildItem(i));
     }
     Widget finalWidget;
-    if (orientation == OptionsOrientation.vertical) {
+    if (orientation == OptionsOrientation.auto) {
+      finalWidget = OverflowBar(
+        alignment: MainAxisAlignment.spaceEvenly,
+        children: widgetList,
+      );
+    } else if (orientation == OptionsOrientation.vertical) {
       finalWidget = SingleChildScrollView(
         scrollDirection: Axis.vertical,
         child: Column(

lib/src/widgets/grouped_radio.dart

@@ -218,6 +218,11 @@ class _GroupedRadioState<T> extends State<GroupedRadio<T?>> {
     }
 
     switch (widget.orientation) {
+      case OptionsOrientation.auto:
+        return OverflowBar(
+          alignment: MainAxisAlignment.spaceEvenly,
+          children: widgetList,
+        );
       case OptionsOrientation.vertical:
         return SingleChildScrollView(
           scrollDirection: Axis.vertical,