text_form_field set default initialValues, unable to get default value when click a button, returning null value.

[vijaymsc]

main.dart

import 'dart:convert';
import 'package:json_dynamic_widget/json_dynamic_widget.dart';
import 'package:http/http.dart' as http;

void main() {
  launcher();
}

void launcher() {

  WidgetsFlutterBinding.ensureInitialized();

  final registry = JsonWidgetRegistry.instance;

  Map<String, JsonWidgetFunction> registryFunc = {

    "validateForm": ({args, required registry}) => () async {
          final BuildContext context = registry.getValue(args![0]);
          bool valid = Form.of(context).validate();
          if (valid) {
            var userName = registry.getValue('user_email');
            var userPassword = registry.getValue('user_password');
          bool status = await validateUserData(userName, userPassword);
          if(status)
            {
              registry.setValue('user_email', '');
              registry.setValue('user_password', '');
            }
            showSnackBar(context,status?"Login Success": "Login Failed");

          }
        }

  };
  registry.registerFunctions(registryFunc);

  runApp(const MaterialApp(
    debugShowCheckedModeBanner: false,
    home: AuthLogin(),
  ));
}

class AuthLogin extends StatelessWidget {
  const AuthLogin({super.key});

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<String>(
        future: getJsonWidget(),
        builder: (context, snapShot) {
          if (snapShot.connectionState == ConnectionState.done) {
            final registry = JsonWidgetRegistry.instance.copyWith();
            final widget = JsonWidgetData.fromDynamic(
              json.decode(snapShot.data!),
              registry: registry,
            );
            return widget.build(context: context);
          }
          return const Center(child: CircularProgressIndicator());
        });
  }

  Future<String> getJsonWidget() async {
    String jsonData =
        await rootBundle.loadString('assets/example/user_auth.json');
    return jsonData;
  }
}
Future<bool> validateUserData(
    String userEmail, String password) async {
  var map = {"email": userEmail, "password": password};
  print(map);
  var result =
      await http.post(Uri.parse('https://reqres.in/api/login'), body: map);
  print('${result.statusCode}');
  if (result.statusCode == 200 || result.statusCode == 201) {

    return true;
  }
  return false;
}

showSnackBar(BuildContext context,String content){
  ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(content)));
}

user_auth.json

{
  "type": "scaffold",
  "args": {
    "backgroundColor": "#C0C0C0",
    "appBar": {
      "type": "app_bar",
      "args": {
        "backgroundColor": "#C0C0C0",
        "title": {
          "type": "text",
          "args": {
            "text": "User Login"
          }
        }
      }
    },
    "body": {
      "type": "padding",
      "args": {
        "padding": 25,
        "child": {
          "type": "center",
          "args": {
            "child": {
              "type": "column",
              "args": {
                "mainAxisAlignment": "center",
                "children": [
                  {
                    "type": "text",
                    "args": {
                      "text": "Welcome",
                      "style": {
                        "fontSize": 30,
                        "fontWeight": "bold"
                      }
                    }
                  },
                  {
                    "type": "sized_box",
                    "args": {
                      "height": 20.0
                    }
                  },
                  {
                    "type": "form",
                    "args": {
                      "child": {
                        "type": "column",
                        "args": {
                          "children": [
                            {
                              "type": "text_form_field",
                              "id": "user_email",
                              "args": {
                               "autovalidateMode": "onUserInteraction",
                                "initialValue": "eve.holt@reqres.in",
                                "decoration": {
                                  "hintText": "Enter User Email....",
                                  "labelText": "User Email",
                                  "border": {
                                    "type": "outline",
                                    "borderRadius": 15.0
                                  }
                                },
                                "validators": [
                                  {
                                    "type": "required"
                                  },
                                  {
                                    "type": "email"
                                  }
                                ]
                              }
                            },
                            {
                              "type": "sized_box",
                              "args": {
                                "height": 30.0
                              }
                            },
                            {
                              "type": "text_form_field",
                              "id": "user_password",
                              "args": {
                                "obscureText": true,
                                "initialValue": "cityslicka",
                                "decoration": {
                                  "hintText": "Enter User password....",
                                  "labelText": "User Password",
                                  "border": {
                                    "type": "outline",
                                    "borderRadius": 15.0
                                  }
                                },
                                "validators": [
                                  {
                                    "type": "required"
                                  }
                                ]
                              }
                            },
                            {
                              "type": "sized_box",
                              "args": {
                                "height": 30.0
                              }
                            },
                            {
                              "type": "elevated_button",
                              "id": "submit_button",
                              "listen": ["user_email","user_password"],
                              "args": {
                                "onPressed": "${validateForm('form_context','https://reqres.in/api/login',{'email':'user_email','password':'user_password'})}",
                                "style": {
                                  "backgroundColor": "#0000FF"
                                },
                                "child": {
                                  "type": "save_context",
                                  "args": {
                                    "key": "form_context",
                                    "child": {
                                      "type": "text",
                                      "args": {
                                        "text": "Login",
                                        "style": {
                                          "fontSize": 25,
                                          "color": "#FFFFFF",
                                          "fontWeight": "bold"
                                        }
                                      }
                                    }
                                  }
                                }
                              }
                            }
                          ]
                        }
                      }
                    }
                  }
                ]
              }
            }
          }
        }
      }
    }
  }
}

[vijaymsc]

Output

{email: null, password: null}