Flutter DataTable remove extra padding

Question

I want to display some data in a DataTable, i have 9 columns, all of them are number except the first one.

The problem i'm having is, i only see the first 5 columns, not because data are too long, but because there are a lot of space between every column.

Is there a way to make the DataColumn wrap the data with a padding i choose? This is my code:

Scaffold(
  appBar: AppBar(
    title: Text('DataTable Sample'),
  ),
  body: Container(
    child: DataTable(columns: <DataColumn>[
          DataColumn(
            label: Text('Name'),
          ),
          DataColumn(
            label: Text('A'),
          ),
          DataColumn(
            label: Text('B'),
          ),
          DataColumn(
            label: Text('C'),
          ),
          DataColumn(
            label: Text('D'),
          ),
          DataColumn(
            label: Text('E'),
          ),
          DataColumn(
            label: Text('F'),
          ),
          DataColumn(
            label: Text('G'),
          ),
          DataColumn(
            label: Text('H'),
          ),
        ], rows: <DataRow>[
          DataRow(cells: [
            DataCell(Text('1 Boston')),
            DataCell(Text('3')),
            DataCell(Text('3')),
            DataCell(Text('7')),
            DataCell(Text('1')),
            DataCell(Text('30')),
            DataCell(Text('8')),
            DataCell(Text('+2')),
            DataCell(Text('-22')),
          ]),
          DataRow(cells: [
            DataCell(Text('2 London')),
            DataCell(Text('3')),
            DataCell(Text('4')),
            DataCell(Text('12')),
            DataCell(Text('44')),
            DataCell(Text('7')),
            DataCell(Text('44')),
            DataCell(Text('-98')),
            DataCell(Text('0')),
          ]),
          DataRow(cells: [
            DataCell(Text('3 Rome')),
            DataCell(Text('10')),
            DataCell(Text('50')),
            DataCell(Text('90')),
            DataCell(Text('4')),
            DataCell(Text('7')),
            DataCell(Text('33')),
            DataCell(Text('+5')),
            DataCell(Text('-61')),
          ]),
        ]
        )
  ),
);

nilsmagnus · Accepted Answer · 2022-11-21 20:13:29Z

20

Try setting horizontalMargin to 0 as this value defaults to 24.0:

...
DataTable(
   horizontalMargin: 0,
   columnSpacing: 10,
   columns: [
...

Ref.Datatable horizontalMargin official documentation

edited Nov 21, 2022 at 20:13

nilsmagnus

2,34224 silver badges35 bronze badges

answered Mar 16, 2021 at 9:30

Denis Esin

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Comments

Leonardo Rignanese · Accepted Answer · 2021-09-27 12:36:26Z

you can use SingleChildScrollView and FittedBox as its child.

Scaffold(
  appBar: AppBar(
    title: Text('DataTable Sample'),
  ),
  body: SingleChildScrollView(
    scrollDirection: Axis.vertical,
    child: FittedBox(
      child: DataTable(
        columns: <DataColumn>[
          DataColumn(
            label: Text('Name'),
          ),
          DataColumn(
            label: Text('A'),
          ),
          DataColumn(
            label: Text('B'),
          ),
          DataColumn(
            label: Text('C'),
          ),
          DataColumn(
            label: Text('D'),
          ),
          DataColumn(
            label: Text('E'),
          ),
          DataColumn(
            label: Text('F'),
          ),
          DataColumn(
            label: Text('G'),
          ),
          DataColumn(
            label: Text('H'),
          ),
        ],
        rows: <DataRow>[
          DataRow(cells: [
            DataCell(Text('1 Boston')),
            DataCell(Text('3')),
            DataCell(Text('3')),
            DataCell(Text('7')),
            DataCell(Text('1')),
            DataCell(Text('30')),
            DataCell(Text('8')),
            DataCell(Text('+2')),
            DataCell(Text('-22')),
          ]),
          DataRow(cells: [
            DataCell(Text('2 London')),
            DataCell(Text('3')),
            DataCell(Text('4')),
            DataCell(Text('12')),
            DataCell(Text('44')),
            DataCell(Text('7')),
            DataCell(Text('44')),
            DataCell(Text('-98')),
            DataCell(Text('0')),
          ]),
          DataRow(cells: [
            DataCell(Text('3 Rome')),
            DataCell(Text('10')),
            DataCell(Text('50')),
            DataCell(Text('90')),
            DataCell(Text('4')),
            DataCell(Text('7')),
            DataCell(Text('33')),
            DataCell(Text('+5')),
            DataCell(Text('-61')),
          ]),
        ],
      ),
    ),
  ),
);

FittedBox does nothing in this case as its purpose is to fit in the limiting area of the parent, while the parent is infinitely growing.

TheMri · Accepted Answer · 2019-06-27 08:11:57Z

12

Yes. Lately flutter team merged an update to this Widget. It is now only in the "master" channel (You are probably on "stable"), to switch run flutter channel master and then flutter upgrade in the terminal. After doing so you can control the space between each column by setting the columnSpacing parameter of DataTable. For further information check out this closed issue

answered Jun 27, 2019 at 8:11

TheMri

1,3171 gold badge8 silver badges12 bronze badges

1 Comment

jaredbaszler Over a year ago

I thought this wasn't working at first as I was developing on Flutter For Web and if there is more space to use, it will spread your columns out appropriately.

Amal Jogy · Accepted Answer · 2020-11-18 13:30:57Z

3

Try passing columnSpacing parameter inside your 'DataTable()' function, it seems to accept it, The default value is 56, reducing it will cramp the columns and increasing it will spread data out

answered Nov 18, 2020 at 13:30

Amal Jogy

371 silver badge4 bronze badges

1 Comment

ConnieMnemonic May 30 at 11:28

Legendary answer, thank you. We really wanted to avoid horizontal scrolling and this saved my bacon.

Yash · Accepted Answer · 2019-03-21 06:18:16Z

You can use Table instead of DataTable. For further reference - video.

This is how you can use it:

Scaffold(
    appBar: AppBar(title: Text('DataTable Sample')),
    body: Container(
      child: Table(
        columnWidths: {0:FractionColumnWidth(.2)},
        children: [
        TableRow(
          children: [
            Text("Name",),
            Text("A",textAlign: TextAlign.center,),
            Text("B",textAlign: TextAlign.center,),
            Text("A",textAlign: TextAlign.center,),
            Text("B",textAlign: TextAlign.center,),
            Text("A",textAlign: TextAlign.center,),
            Text("B",textAlign: TextAlign.center,),
            Text("A",textAlign: TextAlign.center,),
            Text("B",textAlign: TextAlign.center,),
          ]
         ),
         TableRow(
          children: [
            Text("1 Boston",),
            Text('3',textAlign: TextAlign.center,),
            Text('3',textAlign: TextAlign.center,),
            Text('7',textAlign: TextAlign.center,),
            Text('1',textAlign: TextAlign.center,),
            Text('30',textAlign: TextAlign.center,),
            Text('8',textAlign: TextAlign.center,),
            Text('+2',textAlign: TextAlign.center,),
            Text('-22',textAlign: TextAlign.center,),
          ]
         ),
         TableRow(
          children: [
            Text('2 London',),
            Text('3',textAlign: TextAlign.center,),
            Text('4',textAlign: TextAlign.center,),
            Text('12',textAlign: TextAlign.center,),
            Text('44',textAlign: TextAlign.center,),
            Text('7',textAlign: TextAlign.center,),
            Text('44',textAlign: TextAlign.center,),
            Text('-98',textAlign: TextAlign.center,),
            Text('0',textAlign: TextAlign.center,),
          ]
         ),
        TableRow(
          children: [
              Text('3 Rome'),
              Text('10',textAlign: TextAlign.center,),
              Text('50',textAlign: TextAlign.center,),
              Text('90',textAlign: TextAlign.center,),
              Text('4',textAlign: TextAlign.center,),
              Text('7',textAlign: TextAlign.center,),
              Text('33',textAlign: TextAlign.center,),
              Text('+5',textAlign: TextAlign.center,),
              Text('-61',textAlign: TextAlign.center,),
          ]
         ),
        ]
      ),
    )
  ),

I got the same thing, i can't see the whole table, and i want to use DataTable because of some functionalities like Sorting data.

bunny · Accepted Answer · 2019-04-09 08:49:16Z

Currently, even I am stuck with the same issue, but I have found an alternative to this problem where you can see all your 9 columns. Have a look if it can help you.

use SingleChildScrollView to scroll the Datatable horizontally

Scaffold(
appBar: AppBar(title: Text('DataTable Sample')),
body: data()
)

create a function outside "Widget build(BuildContext context) {}" as given below

SingleChildScrollView data() { 
return SingleChildScrollView(
  scrollDirection: Axis.horizontal,
  child: Container(
child: DataTable(columns: <DataColumn>[
      DataColumn(
        label: Text('Name'),
      ),
      DataColumn(
        label: Text('A'),
      ),
      DataColumn(
        label: Text('B'),
      ),
      DataColumn(
        label: Text('C'),
      ),
      DataColumn(
        label: Text('D'),
      ),
      DataColumn(
        label: Text('E'),
      ),
      DataColumn(
        label: Text('F'),
      ),
      DataColumn(
        label: Text('G'),
      ),
      DataColumn(
        label: Text('H'),
      ),
    ], rows: <DataRow>[
      DataRow(cells: [
        DataCell(Text('1 Boston')),
        DataCell(Text('3')),
        DataCell(Text('3')),
        DataCell(Text('7')),
        DataCell(Text('1')),
        DataCell(Text('30')),
        DataCell(Text('8')),
        DataCell(Text('+2')),
        DataCell(Text('-22')),
      ]),
      DataRow(cells: [
        DataCell(Text('2 London')),
        DataCell(Text('3')),
        DataCell(Text('4')),
        DataCell(Text('12')),
        DataCell(Text('44')),
        DataCell(Text('7')),
        DataCell(Text('44')),
        DataCell(Text('-98')),
        DataCell(Text('0')),
      ]),
      DataRow(cells: [
        DataCell(Text('3 Rome')),
        DataCell(Text('10')),
        DataCell(Text('50')),
        DataCell(Text('90')),
        DataCell(Text('4')),
        DataCell(Text('7')),
        DataCell(Text('33')),
        DataCell(Text('+5')),
        DataCell(Text('-61')),
      ]),
    ]
    )
  ),
  }

Let me know if it solves your problem

Berhe Gebre · Accepted Answer · 2020-10-22 12:13:03Z

0

To remove the space between every column, you can change the value of columnSpacing which is 56 by default.

answered Oct 22, 2020 at 12:13

Berhe Gebre

191 bronze badge

1 Comment

Lulupointu Over a year ago

Please provide a code snippet showcasing how to do this.

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