flutter setState Delay in bottomSheet - flutter

Question

i made a code which opens bottomSheet. Inside the bottomSheet there are inputs that can be added and subtracted by pressing a button.
but the changes that occur are not in accordance with what I expected. changes are delayed not directly.
Widget buildBottomSheet(BuildContext context) => makeDismissible(
child: DraggableScrollableSheet(
initialChildSize: 0.6,
minChildSize: 0.5,
maxChildSize: 0.6,
builder: (_, controller) => Container(
decoration: const BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
),
padding: const EdgeInsets.only(top: 10),
child: Column(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Center(child: Icon(Icons.horizontal_rule)),
ListTile(
title: Container(
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.start,
children: [
Row(
children: [
ClipRRect(
borderRadius:
const BorderRadius.all(Radius.circular(20)),
child: Image.network(
widget.productList.image,
width: 125,
height: 125,
fit: BoxFit.cover,
),
),
SizedBox(
height: 125,
child: Padding(
padding:
const EdgeInsets.symmetric(horizontal: 15),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
if (widget.productList.discount == 0)
Text(
CurrencyFormat.convertToIdr(
widget.productList.price, 0),
style: const TextStyle(
fontWeight: FontWeight.w600,
fontSize: 18),
),
if (widget.productList.discount >= 1)
Text(
CurrencyFormat.convertToIdr(
widget.productList.price -
(widget.productList.discount /
100) *
widget.productList.price,
0),
style: const TextStyle(
fontWeight: FontWeight.w600,
fontSize: 18),
),
if (widget.productList.discount >= 1)
Row(
children: [
Text(
"${widget.productList.discount}% ",
style: const TextStyle(
color: Colors.red,
fontWeight: FontWeight.w600),
),
Text(
CurrencyFormat.convertToIdr(
widget.productList.price, 0),
style: const TextStyle(
color: Colors.black38,
fontWeight: FontWeight.w600,
decoration:
TextDecoration.lineThrough),
)
],
),
Text("Stock : ${widget.productList.stock}")
],
),
),
),
],
),
],
),
),
// minLeadingWidth: 125,
trailing: SizedBox(
child: IconButton(
onPressed: () => Navigator.pop(context),
icon: const Icon(Icons.close)),
),
),
const SizedBox(
height: 10,
),
const Divider(
indent: 15,
endIndent: 15,
color: Colors.black,
),
const SizedBox(
height: 10,
),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: Column(
children: const [
Text(
"Pilihan Varian :",
style: TextStyle(fontWeight: FontWeight.w800),
),
],
),
),
const Spacer(),
SizedBox(
child: Padding(
padding: const EdgeInsets.symmetric(
vertical: 15, horizontal: 10),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
ElevatedButton(
onPressed: _minCounter,
clipBehavior: Clip.antiAlias,
style: ElevatedButton.styleFrom(
shadowColor: Colors.white,
primary: Colors.black,
padding: const EdgeInsets.symmetric(
horizontal: 0, vertical: 0),
),
child: const Icon(Icons.remove),
),
Text('${widget.productList.minbuy + counter} '),
// const SizedBox(
// width: 50,
// height: 35,
// child: TextField(
// textAlign: TextAlign.center,
// decoration: InputDecoration(
// border: OutlineInputBorder(
// borderSide:
// BorderSide(color: Colors.black)),
// ),
// ),
// ),
ElevatedButton(
onPressed: _incrementCounter,
clipBehavior: Clip.antiAlias,
style: ElevatedButton.styleFrom(
shadowColor: Colors.white,
primary: Colors.black,
padding: const EdgeInsets.symmetric(
horizontal: 0, vertical: 0),
),
child: const Icon(Icons.add),
),
],
),
ElevatedButton.icon(
icon: const Icon(
Icons.add,
color: Colors.amber,
size: 14,
),
label: const Text(
"Keranjang",
style: TextStyle(color: Colors.amber),
),
clipBehavior: Clip.antiAlias,
onPressed: () {},
style: ElevatedButton.styleFrom(
side: const BorderSide(color: Colors.amber),
shadowColor: Colors.white,
primary: Colors.white,
padding: const EdgeInsets.symmetric(
horizontal: 15, vertical: 10),
),
),
],
),
),
),
],
),
),
),
);
for full code : https://github.com/nazhoir/travel-app/blob/main/lib/views/shop/product_detail.dart