setState the showDialog() from outside flutter - flutter

Question

I need to setState the showDialog() from the outside. The showDialog() shows how many images are uploaded to Firestore. But setState is not working because it doesn't change the state of showDialog(). Is there any way to change the state of showDialog() from outside??
Here is my code.
Future<void> _upload() async {
Reference storageReference;
showDialog(
context: context,
builder: (context) {
return AlertDialog(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(10)),
side: BorderSide(width: 1, color: Colors.white),
),
contentPadding: EdgeInsets.all(20),
content: SizedBox(
height: 150,
width: 180,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
SpinKitRing(
color: Color(0xff43b0e2),
lineWidth: 10,
size: 100,
),
// here is the part I want to setState
Text("$value/${widget.imagelist.length + 1}",
style: TextStyle(
color: Color(0xff43b0e2),
fontWeight: FontWeight.w800,
fontFamily: "Montserrat",
fontStyle: FontStyle.normal,
fontSize: 18.0),
textAlign: TextAlign.center),
],
),
),
backgroundColor: Colors.grey.withOpacity(0.9),
);
},
);
for (File image in widget.imagelist) {
storageReference = FirebaseStorage.instance.ref().child('project/' +
FirebaseAuth.instance.currentUser.uid +
"/" +
widget.title +
"/" +
image.path.toString().split("/").last);
await storageReference.putFile(image);
String downloadURL = await storageReference.getDownloadURL();
setState(() {
imglist.add(downloadURL);
value += 1;
});
}
storageReference = FirebaseStorage.instance.ref().child('project/' +
FirebaseAuth.instance.currentUser.uid +
"/" +
widget.title +
"/thumbnail");
await storageReference.putFile(widget.thumbnail);
String thumbnailURL = await storageReference.getDownloadURL();
setState(() {
value += 1;
});
await FirebaseFirestore.instance.collection('Gallery').add({
"author": FirebaseAuth.instance.currentUser.uid,
"bookmark": <String>[],
"description": widget.description,
"image": imglist,
"liked": <String>[],
"time": Timestamp.fromDate(DateTime.now()),
"title": widget.title,
"visited": 0,
"is18": widget.is18,
"object": widget.objlist,
"tool": widget.toollist,
"thumbnail": thumbnailURL,
"tag": widget.taglist,
"platform": widget.platform,
});
Navigator.of(context).pop();
}

Answer 1

use valueNotifier
when image uploaded make notifier.value++;
and in showDialog add widget :
ValueListenableBuilder<int>(
valueListenable:notifier,
builder:(ctx,value,child){
return Text("$value/${widget.imagelist.length + 1}",
style: TextStyle(
color: Color(0xff43b0e2),
fontWeight: FontWeight.w800,
fontFamily: "Montserrat",
fontStyle: FontStyle.normal,
fontSize: 18.0),
textAlign: TextAlign.center);
}
);