I am trying and make a Listeview work, which is nested inside of column that is nested inside of a container in flutter. The container is supposed to be a dialog. I think the problem is that the container has no defined hight (it is supposed to adapt to the screen size). With the current code I get a bottom overflow. Maybe because of the padding of the container? I tried differen variants with expanded, flexible and singlechildscrollview but I can't make it work. The standard tip, wrap the ListView with Expanded seems not to work. Thanks for your help!
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Dialog',
debugShowCheckedModeBanner: false,
home: Scaffold(
appBar: AppBar(
title: const Text('Welcome to Flutter'),
),
body: Center(
child: Column(
children: [
MaCard(mitarbeiterName: "Name"),
CustomDialogBoxRow(
title: "Sturmtruppler",
descriptions: "wird noch weichen",
text: "text")
],
),
),
),
);
}
}
class Constants {
Constants._();
static const double padding = 20;
static const double avatarRadius = 100;
static const double buttonHight = 100;
}
class CustomDialogBoxRow extends StatefulWidget {
final String title, descriptions, text;
const CustomDialogBoxRow({
Key? key,
required this.title,
required this.descriptions,
required this.text,
}) : super(key: key);
@override
_CustomDialogBoxRowState createState() => _CustomDialogBoxRowState();
}
class _CustomDialogBoxRowState extends State<CustomDialogBoxRow> {
@override
Widget build(BuildContext context) {
return Dialog(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(Constants.padding),
),
elevation: 0,
backgroundColor: Colors.transparent,
child: contentBox(context),
);
}
contentBox(context) {
return Stack(
children: <Widget>[
Container(
constraints: const BoxConstraints(minWidth: 400, maxWidth: 800),
padding: const EdgeInsets.only(
left: Constants.padding,
right: Constants.padding,
bottom: Constants.padding),
margin: const EdgeInsets.only(top: Constants.avatarRadius),
decoration: BoxDecoration(
shape: BoxShape.rectangle,
color: Colors.white,
borderRadius: BorderRadius.circular(Constants.padding),
boxShadow: [
const BoxShadow(
color: const Color.fromARGB(255, 79, 73, 73),
offset: const Offset(0, 5),
blurRadius: 5),
]),
child: Column(
children: [
SizedBox(
height: Constants.avatarRadius,
child: Row(
children: [
const SizedBox(
child: const Placeholder(),
),
const Expanded(
child: Placeholder(),
),
],
),
),
SingleChildScrollView(
child: Column(
children: [
SizedBox(
height: 50,
child: Text("bla"),
),
SizedBox(
height: 50,
child: Text("bla"),
),
SizedBox(
height: 50,
child: Text("bla"),
),
SizedBox(
height: 50,
child: Text("bla"),
)
],
),
)
],
),
),
Positioned(
left: Constants.padding,
right: Constants.padding,
child: Stack(
children: [
Container(
child: Align(
alignment: Alignment.topLeft,
child: Container(
width: Constants.avatarRadius * 2,
height: Constants.avatarRadius * 2,
child: const CircleAvatar(
radius: Constants.avatarRadius * 2,
backgroundImage: AssetImage('assets/images/SBE.jpg'),
),
),
),
),
],
),
),
],
);
}
}
class MaCard extends StatefulWidget {
MaCard({
Key? key,
required this.mitarbeiterName,
}) : super(key: key);
final String mitarbeiterName;
@override
State<MaCard> createState() => _MaCardState();
}
class _MaCardState extends State<MaCard> {
@override
Widget build(BuildContext context) {
return Card(
child: InkWell(
onTap: () {
print("card taped");
/*showDialog(context: context, builder: (BuildContext context) {
return
})*/
showDialog(
context: context,
builder: (BuildContext context) {
return CustomDialogBoxRow(
title: "Stormtrouper",
descriptions: "Jojo, this is card",
text: "Roger Roger",
);
});
},
child: SizedBox(
height: Constants.buttonHight,
width: 300,
child: Center(child: Text(widget.mitarbeiterName)),
),
));
}
}
Here is picture of what it should look like. My wonderful handdrawing is supposed to be the scrollable content. Goal
CodePudding user response：
It would be better using LayoutBuilder to get parent constraints and size the inner elements. Also You need to wrap with Expaned to get available spaces for infinite size widget.
I will highly recommend to check this video from Flutter.
Changes are made
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Dialog',
debugShowCheckedModeBanner: false,
home: Scaffold(
appBar: AppBar(
title: const Text('Welcome to Flutter'),
),
body: Center(
child: Column(
children: [
MaCard(mitarbeiterName: "Name"),
Expanded( //here
child: CustomDialogBoxRow(
title: "Sturmtruppler",
descriptions: "wird noch weichen",
text: "text"),
)
],
),
),
),
);
}
}
And on contentBox
contentBox(context) {
return LayoutBuilder(builder: (context, constraints) {
print(constraints);
return SizedBox(
width: constraints.maxWidth,
height: constraints.maxHeight,
child: Stack(
children: <Widget>[
Container(
constraints: const BoxConstraints(minWidth: 400, maxWidth: 800),
padding: const EdgeInsets.only(
left: Constants.padding,
right: Constants.padding,
bottom: Constants.padding),
margin: const EdgeInsets.only(top: Constants.avatarRadius),
decoration: BoxDecoration(
shape: BoxShape.rectangle,
color: Colors.white,
borderRadius: BorderRadius.circular(Constants.padding),
boxShadow: const [
BoxShadow(
color: Color.fromARGB(255, 79, 73, 73),
offset: Offset(0, 5),
blurRadius: 5),
]),
child: Column(
children: [
SizedBox(
height: Constants.avatarRadius,
child: Row(
children: [
const Expanded(
child: const Placeholder(),
),
const Expanded(
child: Placeholder(),
),
],
),
),
Expanded(
// or sizedBOx ( constraints.maxHeight- Constants.avatarRadius,)
child: SingleChildScrollView(
child: Column(
children: [
SizedBox(
height: 450,
child: Text("bla"),
),
SizedBox(
height: 50,
child: Text("bla"),
),
SizedBox(
height: 50,
child: Text("bla"),
),
SizedBox(
height: 50,
child: Text("bla"),
)
],
),
),
)
],
),
),
// Positioned(
// left: Constants.padding,
// right: Constants.padding,
// child: Stack(
// children: [
// Container(
// child: Align(
// alignment: Alignment.topLeft,
// child: Container(
// width: Constants.avatarRadius * 2,
// height: Constants.avatarRadius * 2,
// child: const CircleAvatar(
// radius: Constants.avatarRadius * 2,
// backgroundImage: AssetImage('assets/images/SBE.jpg'),
// ),
// ),
// ),
// ),
// ],
// ),
// ),
//
],
),
);
});
}