Flutter DataTable - Tap on row

Question

I am using Flutter DataTables to display list of items in cart. Now I want to edit the quantity of any selected row. Is there a way to get the information of the row user has tapped?

Following is complete code of my DataTable:

class _DataTableSampleState extends State<DataTableSample> {

  void _getSelectedRowInfo() {
    print('Selected Item Row Name Here...')
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('DataTable Sample'),
      ),
      body: Container(
        child: DataTable(
          onSelectAll: (b) {},
          sortAscending: true,
          columns: <DataColumn>[
            DataColumn(
              label: Text('Item'),
            ),
            DataColumn(
              label: Text('Price'),
            ),
          ],
          rows: items
              .map(
                (itemRow) => DataRow(
                      cells: [
                        DataCell(
                          Text(itemRow.itemName),
                          showEditIcon: false,
                          placeholder: false,
                        ),
                        DataCell(
                          Text(itemRow.itemPrice),
                          showEditIcon: true,
                          placeholder: false,
                          onTap: _getSelectedRowInfo,
                        ),
                      ],
                    ),
              )
              .toList(),
        ),
      ),
    );
  }
}

class ItemInfo {
  String itemName;
  String itemPrice;

  ItemInfo({
    this.itemName,
    this.itemPrice,
  });
}

var items = <ItemInfo>[
  ItemInfo(
    itemName: 'Item A',
    itemPrice: '250',
  ),
  ItemInfo(
    itemName: 'Item B',
    itemPrice: '100',
  ),
  ItemInfo(
    itemName: 'Item C',
    itemPrice: '150',
  ),
];

When edit icon is clicked "_getSelectedRowInfo" method is called. I want to get complete detail of selected/tapped row in this function.

Answer 1

you can use onSelectChanged property from DataRow.

rows: items
    .map(
        (itemRow) => DataRow(
            onSelectChanged: (bool selected) {
                if (selected) {
                    log.add('row-selected: ${itemRow.index}');
                }
            },
            cells: [
                // ..
            ],
        ),

Answer 2

Each DataCell has an onTap callback. You could use this without the unhideable checkbox appearing on your table rows. For example

DataCell(Text(itemrow.itemname),
      onTap: () {
// Your code here
})

This works for me. If you want the onTap to work for the entire DataRow instead of only a DataCell, you could just add the logic to the onTap of each DataCell and get the desired result.