Flutter Border/BorderSide hides content - flutter-layout

Question

This is working box with rounded corner on the bottom left corner:
Container(
decoration: BoxDecoration(
// border: Border(
// right: BorderSide(
// color: Colors.red,
// width: 2,
// ),
// ),
borderRadius: BorderRadius.only(
bottomLeft: Radius.circular(10.0)),
color: Colors.grey,
),
child: new Column(
children: <Widget>[
new Padding(
padding: EdgeInsets.only(top: 5, bottom: 5),
child: new Text("......"))
],
))
If I uncomment the above 6 lines, the content disappears, but no top border appears.
What am I doing wrong?

Answer 1

You can copy paste run full code below
This violate rule in framework's box_border.dart
assert(borderRadius == null, 'A borderRadius can only be given for uniform borders.');
You can use ClipRRect's borderRadius
code snippet
ClipRRect(
borderRadius: BorderRadius.only(bottomLeft: Radius.circular(10.0)),
child: Container(
decoration: BoxDecoration(
border: Border(
right: BorderSide(
color: Colors.red,
width: 2,
),
),
color: Colors.grey,
),
working demo
full code
import 'package:flutter/material.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState 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: ClipRRect(
borderRadius: BorderRadius.only(bottomLeft: Radius.circular(10.0)),
child: Container(
decoration: BoxDecoration(
border: Border(
right: BorderSide(
color: Colors.red,
width: 2,
),
),
//borderRadius: BorderRadius.only(bottomLeft: Radius.circular(10.0)),
color: Colors.grey,
),
child: Column(
children: <Widget>[
Padding(
padding: EdgeInsets.only(top: 5, bottom: 5),
child: Text("......"))
],
)),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}