Trying to add a delete button in a listViewBuilder - flutter

Question

I am trying to add a delete button in a ListViewBuilder and I have gotten the Delete function to work but I can not seem to get the listViewBuilder to refresh to show the user the new list without going to another screen.
ListViewBuilder Widget:
class LayoutBuilderWidgetDoorsOptions extends StatelessWidget {
LayoutBuilderWidgetDoorsOptions({Key? key}) : super(key: key);
String? dropdownValueObjects;
String? dropdownValueDoorWidth;
String? dropdownValueDoorPanelType;
String? dropdownValueOpLcWidth;
String? dropdownValueOpLcPanelType;
String? dropdownValueWalls;
bool deleted = false;
#override
Widget build(BuildContext context) {
return Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Container(
margin: const EdgeInsets.all(20),
width: 150,
child: DropdownButton(
value: dropdownValueObjects,
icon: const Icon(Icons.arrow_downward),
elevation: 16,
onChanged: (String? value) {
if (value == 'Sliding Door') {
if (SelectedUpperPanelHt == 'None') {
Fluttertoast.showToast(
msg:
'ERROR: Sliding Door can not have top removed. Please remove Sliding Doors or change Upper Height',
webPosition: "center",
webBgColor:
"linear-gradient(to right, #dc1c13, #B90E0A)",
timeInSecForIosWeb: 5,
toastLength: Toast.LENGTH_LONG);
throw new FormatException();
}
}
dropdownValueObjects = value!;
(context as Element).markNeedsBuild();
},
items: Options.map<DropdownMenuItem<String>>((String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value),
);
}).toList(),
),
),
if (dropdownValueObjects == 'Swing Door' ||
dropdownValueObjects == 'Sliding Door' ||
dropdownValueObjects == null)
Container(
margin: const EdgeInsets.all(20),
width: 150,
child: DropdownButton(
value: dropdownValueDoorPanelType,
icon: const Icon(Icons.arrow_downward),
elevation: 16,
onChanged: (String? value) {
if (value != 'Select A Value') {
dropdownValueDoorPanelType = value!;
(context as Element).markNeedsBuild();
} else {
Fluttertoast.showToast(
msg: 'Select A Value is not a valid choice',
webPosition: "center",
webBgColor:
"linear-gradient(to right, #dc1c13, #B90E0A)",
timeInSecForIosWeb: 5,
toastLength: Toast.LENGTH_LONG);
throw new FormatException();
}
},
items: PanelTypeOptions.map<DropdownMenuItem<String>>(
(String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value),
);
}).toList(),
),
),
if (dropdownValueObjects == 'Swing Door' ||
dropdownValueObjects == 'Sliding Door' ||
dropdownValueObjects == null)
Container(
margin: const EdgeInsets.all(20),
width: 150,
child: DropdownButton(
value: dropdownValueDoorWidth,
icon: const Icon(Icons.arrow_downward),
elevation: 16,
onChanged: (String? value) {
dropdownValueDoorWidth = value!;
(context as Element).markNeedsBuild();
},
items: DoorWidthOptions.map<DropdownMenuItem<String>>(
(String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value),
);
}).toList(),
),
),
if (dropdownValueObjects == 'Opening' ||
dropdownValueObjects == 'Light Curtain')
Container(
margin: const EdgeInsets.all(20),
width: 150,
child: DropdownButton(
value: dropdownValueOpLcPanelType,
icon: const Icon(Icons.arrow_downward),
elevation: 16,
onChanged: (String? value) {
if (value != 'Select A Value') {
dropdownValueOpLcPanelType = value!;
(context as Element).markNeedsBuild();
} else {
Fluttertoast.showToast(
msg: 'Select A Value is not a valid choice',
webPosition: "center",
webBgColor:
"linear-gradient(to right, #dc1c13, #B90E0A)",
timeInSecForIosWeb: 5,
toastLength: Toast.LENGTH_LONG);
throw new FormatException();
}
},
items:
NAOption.map<DropdownMenuItem<String>>((String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value),
);
}).toList(),
),
),
if (dropdownValueObjects == 'Opening' ||
dropdownValueObjects == 'Light Curtain')
Container(
margin: const EdgeInsets.all(20),
width: 150,
child: DropdownButton(
value: dropdownValueOpLcWidth,
icon: const Icon(Icons.arrow_downward),
elevation: 16,
onChanged: (String? value) {
dropdownValueOpLcWidth = value!;
(context as Element).markNeedsBuild();
},
items: PanelWidthOptions.map<DropdownMenuItem<String>>(
(String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value),
);
}).toList(),
),
),
Container(
margin: const EdgeInsets.all(20),
width: 150,
child: DropdownButton(
value: dropdownValueWalls,
icon: const Icon(Icons.arrow_downward),
elevation: 16,
onChanged: (String? value) {
dropdownValueWalls = value!;
(context as Element).markNeedsBuild();
},
items:
ActualWalls.map<DropdownMenuItem<String>>((String value) {
return DropdownMenuItem<String>(
value: value,
child: Text(value),
);
}).toList(),
),
),
FloatingActionButton.extended(
onPressed: () {
deleted = true;
for (var i = 0; i < listDynamicDoorsOptions.length; i++) {
if (listDynamicDoorsOptions[i].deleted == true) {
listDynamicDoorsOptions.removeAt(i);
(context as Element).markNeedsBuild();
}
}
},
label: Text('Delete', style: TextStyle(color: Colors.white)))
],
),
],
),
);
}
}
I have used the Function: (context as Element).markNeedsBuild(); to reload the dropdownButtons but this does not need to work in this cause because now the context is deleted. Obviously SetState((){}); will not work since this has to be a Stateless Widget. Any help would be greatly appreciated!