From 1fc8d94def4592aeb52418043f689e044c884e73 Mon Sep 17 00:00:00 2001
From: Goxiaoy <xy1996mail@gmail.com>
Date: Wed, 12 Jul 2023 21:29:27 +0800
Subject: [PATCH] fix  panel_dynamic

---
 lib/ui/elements/panel_dynamic.dart            |  6 +++---
 .../reactive/reactive_nested_group_array.dart | 20 ++++++++++++++++---
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/lib/ui/elements/panel_dynamic.dart b/lib/ui/elements/panel_dynamic.dart
index 6de47c96..164b70d7 100644
--- a/lib/ui/elements/panel_dynamic.dart
+++ b/lib/ui/elements/panel_dynamic.dart
@@ -6,7 +6,6 @@ import 'package:flutter_survey_js/ui/survey_configuration.dart';
 import 'package:flutter_survey_js_model/flutter_survey_js_model.dart' as s;
 import 'package:reactive_forms/reactive_forms.dart';
 
-
 Widget panelDynamicBuilder(BuildContext context, s.Elementbase element,
     {ElementConfiguration? configuration}) {
   return PanelDynamicElement(
@@ -25,12 +24,13 @@ class PanelDynamicElement extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    createNew() {
+    createNew({Object? value}) {
       //create new formGroup
       return elementsToFormGroup(
           context,
           (element.templateElements?.map((p0) => p0.realElement).toList() ?? [])
-              .toList());
+              .toList(),
+          value: value);
     }
 
     return ReactiveNestedGroupArray(
diff --git a/lib/ui/reactive/reactive_nested_group_array.dart b/lib/ui/reactive/reactive_nested_group_array.dart
index 10e7bd87..298617c2 100644
--- a/lib/ui/reactive/reactive_nested_group_array.dart
+++ b/lib/ui/reactive/reactive_nested_group_array.dart
@@ -12,7 +12,7 @@ class ReactiveNestedGroupArray<T> extends StatelessWidget {
   final FormArray<T>? formArray;
   final Widget? child;
   final ReactiveNestedGroupArrayBuilder builder;
-  final AbstractControl<T> Function()? createNew;
+  final FormGroup Function({Object? value}) createNew;
   final int minLength;
   final int? maxLength;
 
@@ -23,7 +23,7 @@ class ReactiveNestedGroupArray<T> extends StatelessWidget {
     this.formArray,
     this.child,
     required this.builder,
-    this.createNew,
+    required this.createNew,
     this.minLength = 0,
     this.maxLength,
   })  : assert(minLength >= 0),
@@ -48,7 +48,21 @@ class ReactiveNestedGroupArray<T> extends StatelessWidget {
       child: child,
       builder: (context, formArray, child) {
         while (formArray.controls.length < minLength) {
-          formArray.add(createNew!());
+          formArray.add(createNew());
+        }
+        final formGroups = <FormGroup>[];
+        bool modified = false;
+        for (final c in formArray.controls) {
+          if (c is FormGroup) {
+            formGroups.add(c);
+          } else {
+            formGroups.add(createNew(value: c.value));
+            modified = true;
+          }
+        }
+        if (modified) {
+          formArray.clear();
+          formArray.addAll(formGroups);
         }
         final controls = formArray.controls.cast<FormGroup>().toList();
         return Column(children: [