Flutter DataTable select Row - flutter

Question

I have a problem with DataTable in flutter. I want to change the state of the row, when the user click on one of them, but I found just how to do this "manually" with selected: true, inside DataRow.
How can I let the user select just a single row, and deselect the rest, by changing the state?
content: Column(
children: <Widget>[
DataTable(
columns: [
DataColumn(label: Text('Language')),
DataColumn(label: Text('Translation')),
],
rows: [
DataRow(selected: true, cells: [
DataCell(
Text(
"RO",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
),
onTap: () {
setState(() {
color = Colors.lightBlueAccent;
});
},
),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'paine'),
),
),
]),
DataRow(cells: [
DataCell(
Text(
"EN",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
), onTap: () {
print('EN is clicked');
}),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'bread'),
),
),
]),
DataRow(cells: [
DataCell(
Text(
"FR",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
), onTap: () {
print('FR is clicked');
}),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'pain'),
),
),
]),
],
),
],
),

Answer 1

You can copy past run full code below
You can use condition in selected like this 0 == selectedIndex where 0 is DataRow index
and change selectedIndex in onSelectChanged
code snippet
int selectedIndex = -1;
...
rows: [
DataRow(
selected: 0 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 0;
});
},
...
DataRow(
selected: 1 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 1;
});
},
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> {
Color color;
int selectedIndex = -1;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
children: <Widget>[
DataTable(
onSelectAll: (val) {
setState(() {
selectedIndex = -1;
});
},
columns: [
DataColumn(label: Text('Language')),
DataColumn(label: Text('Translation')),
],
rows: [
DataRow(
selected: 0 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 0;
});
},
cells: [
DataCell(
Text(
"RO",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
),
onTap: () {
setState(() {
color = Colors.lightBlueAccent;
});
},
),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'paine'),
),
),
]),
DataRow(
selected: 1 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 1;
});
},
cells: [
DataCell(
Text(
"EN",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
), onTap: () {
print('EN is clicked');
}),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'bread'),
),
),
]),
DataRow(
selected: 2 == selectedIndex,
onSelectChanged: (val) {
setState(() {
selectedIndex = 2;
});
},
cells: [
DataCell(
Text(
"FR",
textAlign: TextAlign.left,
style: TextStyle(fontWeight: FontWeight.bold),
), onTap: () {
print('FR is clicked');
}),
DataCell(
TextField(
decoration: InputDecoration(
border: InputBorder.none, hintText: 'pain'),
),
),
]),
],
),
],
),
),
);
}
}

Answer 2

When I needed to call something when I pressed on the DataRow I did the following:
DataRow(
onSelectChanged(_) {
// do something here
}
cells: [],
),
Maybe this will help?
EDIT: this is a simple example of how to select/deselect rows
import 'package:flutter/material.dart';
class Stack1 extends StatefulWidget {
#override
_Stack1State createState() => _Stack1State();
}
class _Stack1State extends State<Stack1> {
bool row1Selected = false;
bool row2Selected = false;
#override
Widget build(BuildContext context) {
return Scaffold(
body: DataTable(
columns: [
DataColumn(
label: Text('My Data'),
),
],
rows: [
DataRow(
selected: row1Selected,
onSelectChanged: (value) {
setState(() {
row1Selected = value;
});
},
cells: [
DataCell(
Text('Data 1'),
),
],
),
DataRow(
selected: row2Selected,
onSelectChanged: (value) {
setState(() {
row2Selected = value;
});
},
cells: [
DataCell(
Text('Data 2'),
),
],
),
],
),
);
}
}

Answer 3

DataTable(
dataTextStyle: TextStyle(
fontSize: 12,
),
headingTextStyle: TextStyle(fontSize: 12),
dataRowHeight: 100,
decoration: BoxDecoration(
color: Constants.backgroundColor,
borderRadius: BorderRadius.circular(20),
// border: Border.all(color: Colors.black),
boxShadow: [
BoxShadow(
color: Colors.grey,
spreadRadius: 2,
blurRadius: 2,
offset: Offset(1, 1),
),
],
),
dividerThickness: 2,
showCheckboxColumn: false,
onSelectAll: (value) {},
columns: [
DataColumn(
label: Text(
'Unit No.',
style: TextStyle(
fontWeight: FontWeight.bold, color: Constants.appColor2),
)),
DataColumn(
label: Text(
'Unit Type',
style: TextStyle(
fontWeight: FontWeight.bold, color: Constants.appColor2),
)),
DataColumn(
label: Text(
'Description',
style: TextStyle(
fontWeight: FontWeight.bold, color: Constants.appColor2),
)),
],
rows: List.generate(
data.length,
(index) => DataRow(
selected: selectedUnit == index,
onSelectChanged: (value) {
print(value);
setState(() {
selectedUnit = index;
unitNumber = data[index].unitId;
});
PersistentNavBarNavigator.pushNewScreen(context,
screen: ShowProductDetails(
unitId: data[index].unitId,
));
},
cells: [
DataCell(Text(
data[index].unitId,
style: TextStyle(
color: Constants.matGold,
),
)),
DataCell(Text(
data[index].unitType,
style: TextStyle(
color: Constants.peach,
),
)),
DataCell(Text(
data[index].decription,
style: TextStyle(
color: Constants.appColor,
),
)),
]),
),
),