Pushing(sending) a single variable to new Class with multiple arguments - flutter

Question

I'm trying to push kombiController.text value to a new class, but after trying all sorts of things, I just don't know what else to do. I'm getting an error "8 positional arguments expected, but found 0, which I'm guessing is due to my FeedbackForm class requiring 8, but I don't find solution to how to fix it or set up some default paramaters.
Note: The other variable message-ekipaController is getting sent normally and I had no troubles implementing it.
I've been trying to fix and find a solution to this "little" problem for 2 days now and no matter from which angle I try to resolve this issue, I just get new problems somewhere else.
mainscreen.dart
import 'package:flutter/material.dart';
import 'secondscreen.dart';
import 'models/feedback_form.dart';
import 'package:flutter/widgets.dart';
class MainScreen extends StatefulWidget {
MainScreen({Key key}) : super(key: key);
#override
_MainScreenState createState() => _MainScreenState();
}
class _MainScreenState extends State<MainScreen> {
String kombi;
String valuePolja;
TextEditingController ekipaController = new TextEditingController();
TextEditingController kombiController = new TextEditingController();
// Default Drop Down Item.
String dropdownValue = 'Tom Cruise';
// To show Selected Item in Text.
String holder = '' ;
List listItem = [
"1", "2", "3", "4", "5"
];
void getDropDownItem(){
setState(() {
holder = dropdownValue ;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("DHL"),
),
body: Center(
child: Column(
children: <Widget> [
TextFormField(
controller: ekipaController,
onChanged: (text) {
valuePolja = text;
},
validator: (value){
if(value.isEmpty){
return "Enter Valid Name";
}else{
return null;
}
},
decoration: InputDecoration(
hintText: "Ime Ekipe",
),
),
DropdownButton(
hint: Text("Izberi Kombi: "),
dropdownColor: Colors.white,
icon: Icon(Icons.arrow_drop_down),
value: kombi,
onChanged: (newValue) {
setState(() {
kombi = newValue;
});
kombiController.text = newValue;
},
items: listItem.map((valueItem) {
return DropdownMenuItem(
value: valueItem,
child: Text(valueItem),
);
}).toList(),
),
Padding(
padding: EdgeInsets.only(top: 30, bottom: 30),
child :
//Printing Item on Text Widget
Text('Selected Item = ' + kombiController.text,
style: TextStyle (fontSize: 22, color: Colors.black))),
ElevatedButton(
child: Text('Next Screen',
style: TextStyle(
color: Colors.white,
),
),
onPressed: () {
Navigator.push(context,
MaterialPageRoute(builder: (context) => SecondScreen(message: ekipaController.text)));
Navigator.push(context,
MaterialPageRoute(builder: (context) => FeedbackForm(kombiController: kombiController.text)));
}
),
],
),
)
);
}
}
feedback_form.dart
import 'package:dhl_app/mainscreen.dart';
import 'package:flutter/widgets.dart';
class FeedbackForm extends StatefulWidget {
const FeedbackForm(this.ime_ekipe, this.ime_stranke, this.postna_stevilka, this.teza, this.type, this.datum, this.dostavljeno, this.kombiController);
final String kombiController;
final String ime_ekipe;
final String ime_stranke;
final String postna_stevilka;
final String teza;
final String type;
final String datum;
final String dostavljeno;
//FeedbackForm(this._ime_ekipe, this._ime_stranke, this._postna_stevilka, this._teza, this._type, this._datum, this._dostavljeno, this.kombiController);
String toParams() => "?ime_ekipe=$ime_ekipe&ime_stranke=$ime_stranke&postna_stevilka=$postna_stevilka&teza=$teza&type=$type&datum=$datum&dostavljeno=$dostavljeno&kombi=$kombiController";
#override
State<StatefulWidget> createState() {
// TODO: implement createState
throw UnimplementedError();
}
}
secondscreen.dart (where the other variable works)
import 'package:flutter/material.dart';
import 'models/controller.dart';
import 'models/feedback_form.dart';
import 'mainscreen.dart';
class SecondScreen extends StatefulWidget {
final String message;
const SecondScreen({Key key, this.message}) : super(key: key);
#override
_SecondScreen createState() => _SecondScreen();
}
class _SecondScreen extends State<SecondScreen> {
var _controller = TextEditingController();
final _formKey = GlobalKey<FormState>();
final _scaffoldKey = GlobalKey<ScaffoldState>();
//TextField Controllers
TextEditingController nameController = TextEditingController();
TextEditingController emailController = TextEditingController();
TextEditingController phoneNumberController = TextEditingController();
TextEditingController feedbackController = TextEditingController();
TextEditingController typeController = TextEditingController();
TextEditingController dateController = TextEditingController();
TextEditingController dostavljenoController = TextEditingController();
TextEditingController kombiController = TextEditingController();
void _submitForm(){
if(_formKey.currentState.validate()) {
FeedbackForm feedbackForm = FeedbackForm(
nameController.text,
emailController.text,
phoneNumberController.text,
feedbackController.text,
typeController.text,
dateController.text,
dostavljenoController.text,
kombiController.text,
);
FormController formController = FormController(
(String response) {
print(response);
if(response == FormController.STATUS_SUCCESS){
_showSnackBar("Feedback Submitted!");
}else {
_showSnackBar("Error Occured!");
}
});
_showSnackBar("Submitting Feedback");
formController.submitForm(feedbackForm);
}
}
_showSnackBar(String message) {
final snackBar = SnackBar(content: Text(message),);
_scaffoldKey.currentState.showSnackBar(snackBar);
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Vnesi Podatke"),
),
key: _scaffoldKey,
body: Form(
key: _formKey,
child: Container(
padding: EdgeInsets.symmetric(vertical: 50, horizontal: 24),
child: Column(
children: <Widget> [
TextFormField(
controller: nameController,
validator: (value){
if(value.isEmpty){
return "Enter Valid Name";
}else{
return null;
}
},
decoration: InputDecoration(
hintText: "${widget.message}",
suffixIcon: IconButton(
onPressed: () => nameController.clear(),
icon: Icon(Icons.clear),
),
),
),
TextFormField(
controller: emailController,
validator: (value){
if(value.isEmpty){
return "Enter Valid Email";
}else{
return null;
}
},
decoration: InputDecoration(
hintText: "Ime Stranke",
suffixIcon: IconButton(
onPressed: () => emailController.clear(),
icon: Icon(Icons.clear),
),
),
),
TextFormField(
controller: phoneNumberController,
validator: (value){
if(value.isEmpty){
return "Enter Valid Mobile Number";
}else{
return null;
}
},
decoration: InputDecoration(
hintText: "Poštna Številka",
suffixIcon: IconButton(
onPressed: () => phoneNumberController.clear(),
icon: Icon(Icons.clear),
),
),
),
TextFormField(
controller: feedbackController,
validator: (value){
if(value.isEmpty){
return "Enter Valid Feedback";
}else{
return null;
}
},
decoration: InputDecoration(
hintText: "Kilogramov",
suffixIcon: IconButton(
onPressed: () => feedbackController.clear(),
icon: Icon(Icons.clear),
),
),
),
TextFormField(
controller: typeController,
validator: (value){
if(value.isEmpty){
return "Enter Valid Feedback";
}else{
return null;
}
},
decoration: InputDecoration(
hintText: "Tip",
suffixIcon: IconButton(
onPressed: () => typeController.clear(),
icon: Icon(Icons.clear),
),
),
),
TextFormField(
controller: dateController,
validator: (value){
if(value.isEmpty){
return "Enter Valid Feedback";
}else{
return null;
}
},
decoration: InputDecoration(
hintText: "Datum",
suffixIcon: IconButton(
onPressed: () => dateController.clear(),
icon: Icon(Icons.clear),
),
),
),
TextFormField(
controller: dostavljenoController,
validator: (value){
if(value.isEmpty){
return "Enter Valid Feedback";
}else{
return null;
}
},
decoration: InputDecoration(
hintText: "Dostavljeno",
suffixIcon: IconButton(
onPressed: () => dostavljenoController.clear(),
icon: Icon(Icons.clear),
),
),
),
RaisedButton(
color: Colors.blue,
textColor: Colors.white,
onPressed: _submitForm,
child: Text('Submit Feedback'),
)
],
)
),
)
);
}
}