Flutter : Let big image overflow inside stack - flutter

Question

I'm trying to let my users increase the size of an image inside a fixed size Stack.
The chosen size can be way above the Stack's size.
This is the result I get for now, even though the image :
Here is the relevant code :
Expanded(
child: AspectRatio(
aspectRatio: myCustomScreen.width / myCustomScreen.height,
child: ClipRRect(
borderRadius: BorderRadius.circular(14),
child: LayoutBuilder(
builder: (context, boxConstraint) {
return Stack(
alignment: Alignment.center,
fit: StackFit.passthrough,
children: [
Container(
color: Colors.blue,
),
//This object doesn't overflow when its width is above the
UnconstrainedBox(
child: Image(
width: (object.width.toDouble() * boxConstraint.biggest.width) / myCustomScreen.width,
image: NetworkImage("www.images.com/image.png", scale: 1)),
),
],
);
},
),
),
),
),
How can I let my users view the real size of the image inside this view without being constrained by the stack ?
Thank you !

Answer 1

Stack has a property called clipBehavior you can use it like this to enable overflow:
Stack(
clipBehavior: Clip.none,
// Your code continues here
Edit: Testing your code I made ti work on dart pad. The steps were, remove the UnconstrainedBox and used the image scale to resize it alongside with the fit property defined as none:
here's the code that I used on darted: https://dartpad.dartlang.org/
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
final String title;
const MyHomePage({
Key? key,
required this.title,
}) : super(key: key);
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
Expanded(
child: AspectRatio(
aspectRatio: 200 / 400,
child: ClipRRect(
borderRadius: BorderRadius.circular(14),
child: LayoutBuilder(
builder: (context, boxConstraint) {
return Stack(
clipBehavior: Clip.none,
alignment: Alignment.center,
fit: StackFit.passthrough,
children: [
Container(
color: Colors.blue,
),
Image(
fit: BoxFit.none,
image: NetworkImage(
"https://images.pexels.com/photos/13406218/pexels-photo-13406218.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=2",
scale: 1 / (_counter + 1),
),
),
],
);
},
),
),
),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.add),
),
);
}
}