passing data immediately without using setstate - flutter

Question

Is there a way to pass data when from alert dialogue box to the same screen immediately without using setstate?
Widget setupShadeColorContainer(
List<ShadeColorDatabase> allShadeData, BuildContext context) {
return SizedBox(
height: 300.0, // Change as per your requirement
width: 300.0, // Change as per your requirement
child: GridView.builder(
shrinkWrap: true,
itemCount: allShadeData.length,
gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: 4, crossAxisSpacing: 10, mainAxisSpacing: 10),
itemBuilder: (ctx, i) {
return GestureDetector(
onTap: () {
rPassedChooseColor = allShadeData[i].rValue;
gPassedChooseColor = allShadeData[i].gValue;
bPassedChooseColor = allShadeData[i].bValue;
setState(() {
Navigator.pop(context, [
rPassedChooseColor,
gPassedChooseColor,
bPassedChooseColor
]);
});
},
child: Container(
child: Stack(
children: [
Container(
color: Color.fromRGBO(
allShadeData[i].rValue!.toInt(),
allShadeData[i].gValue!.toInt(),
allShadeData[i].bValue!.toInt(),
1),
),
Padding(
padding: const EdgeInsets.only(top: 45, left: 5),
child: Text("${allShadeData[i].colorCode}"),
)
],
),
),
);
}),
);
}
showAllColors(
List<ShadeColorDatabase> shadeData, BuildContext context) async {
final size = MediaQuery.of(context).size;
final GlobalKey<FormState> _form = GlobalKey<FormState>();
TextEditingController searchController = TextEditingController();
showDialog(
barrierDismissible: true,
context: context,
builder: (ctx) {
return WillPopScope(
onWillPop: () async => false,
child: AlertDialog(
title: Center(
child: Column(
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
"Fashion's Color",
style: TextStyle(
color: ChooseColor(0).appBarColor1, fontSize: 14),
),
IconButton(
onPressed: () {
Navigator.pop(context);
},
icon: const Icon(Icons.clear))
],
),
Form(
key: _form,
child: Column(
children: [
TextFormField(
decoration: InputDecoration(
border: const OutlineInputBorder(
borderSide: BorderSide.none,
),
contentPadding: EdgeInsets.symmetric(
vertical: size.height * 0.001,
horizontal: size.width * 0.030),
errorBorder: OutlineInputBorder(
borderSide: const BorderSide(
color: Colors.red, width: 1),
borderRadius: BorderRadius.circular(5)),
// labelText: 'Phone Number',
fillColor: const Color(0xffF6F9FA),
filled: true,
hintText: 'Search Color',
prefixIcon: const Icon(Icons.search),
hintStyle: TextStyle(
fontSize: size.height * 0.012 +
size.width * 0.012,
color: Colors.black26),
),
controller: searchController,
),
SizedBox(height: size.height * 0.035),
],
)),
],
),
),
content: setupShadeColorContainer(shadeData, context),
),
);
});
This is my dialogue box this dilogue box open over a screen and i want to pass data from this dilogue box to the same page immediately without using setstate is there any way i can achieve that?. Thanks

Answer 1

showDialog() can return future, and you can return data(myData) on closing dialog using
Navigator.of(context).pop(myData);
showAllColors() async {
final data = await showDialog(context: context, builder: (c){
// on closing dialog
Navigator.of(context).pop(passData);
return data;
}
When you use showAllColors try putting await on async method and also make sure to handle null data.