How to dynamically handle child aspect ratio in gridview builder flutter - flutter

Question

I have a Gridview builder to list items in flutter web. Render flex issue is happening when minimizing screen size. I gave aspect ratio based on screen size. But it is not working as expected. I used layout builder to get screen width.I gave static width but I think its not a good practice.
How to change the aspect ratio dynamically?
class CateGorySellectView extends StatefulWidget {
const CateGorySellectView({Key? key}) : super(key: key);
#override
State<CateGorySellectView> createState() => _CateGorySellectViewState();
}
class _CateGorySellectViewState extends State<CateGorySellectView> {
#override
Widget build(BuildContext conText) {
return Scaffold(
body: Center(
child: Row(
children: [
Expanded(
flex: 3,
child: Container(
child: Padding(
padding: const EdgeInsets.only(left: 80.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: const EdgeInsets.only(right: 300.0),
child: LayoutBuilder(builder: (context, constraints) {
var parentWidth = constraints.maxWidth;
return GridView.builder(
itemCount: areaOfintrest.length,
shrinkWrap: true,
gridDelegate:
SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: parentWidth < 600 ? 3 : 5,
childAspectRatio: parentWidth < 350
? 300 / 250
: parentWidth < 700
? 200 / 150
: parentWidth < 800
? 200 / 170
: 180 / 87,
crossAxisSpacing: 7),
itemBuilder: (_, index) {
return MouseRegion(
cursor: SystemMouseCursors.click,
child: Obx(() {
return Padding(
padding: const EdgeInsets.only(
right: 0, top: 8),
child: Container(
decoration: BoxDecoration(
border: Border.all(
color: AppColors.primaryColor)),
child: Stack(
children: [
Center(
child: Column(
mainAxisAlignment:
MainAxisAlignment.center,
children: [
Padding(
padding:
const EdgeInsets.only(
top: 4.0),
child: AutoSizeText(
areaOfintrest[index]
.toJson()[
'tag_display_name'],
textAlign: TextAlign.center,
),
)
],
)),
],
),
),
);
}),
);
});
}),
)
],
),
),
)),
],
)),
);
}
}