issue_160776

main.dart

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(context) => MaterialApp(home: DataTableDemo());
}

class DataTableDemo extends StatelessWidget {
  const DataTableDemo({super.key});

  @override
  Widget build(context) => Scaffold(
        body: ListView(
          padding: const EdgeInsets.all(16),
          children: [
            PaginatedDataTable(
              header: Text('Header Text'),
              rowsPerPage: 4,
              columns: [
                DataColumn(label: Text('Header A')),
                DataColumn(label: Text('Header B')),
                DataColumn(label: Text('Header C')),
                DataColumn(label: Text('Header D')),
              ],
              source: DataSource(),
            ),
          ],
        ),
      );
}

class Row {
  Row(this.valueA, this.valueB, this.valueC, this.valueD);

  final String valueA, valueB, valueC;
  final int valueD;

  var selected = false;

  List<DataCell> get cells => [
        DataCell(Text(valueA)),
        DataCell(Text(valueB)),
        DataCell(Text(valueC)),
        DataCell(Text(valueD.toString())),
      ];
}

class DataSource extends DataTableSource {
  DataSource();

  final _rows = [
    Row('Cell A1', 'CellB1', 'CellC1', 1),
    Row('Cell A2', 'CellB2', 'CellC2', 2),
    Row('Cell A3', 'CellB3', 'CellC3', 3),
    Row('Cell A4', 'CellB4', 'CellC4', 4),
  ];

  @override
  DataRow? getRow(int index) {
    if (index >= _rows.length) return null;
    final row = _rows[index];
    return DataRow.byIndex(
      index: index,
      selected: row.selected,
      onSelectChanged: (value) {},
      cells: row.cells,
    );
  }

  @override
  int get rowCount => _rows.length;

  @override
  final isRowCountApproximate = false;

  @override
  int get selectedRowCount => 0;
}