Add customizable mouse cursor to DataTable - #123128

import 'package:flutter/material.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(useMaterial3: true),
      home: const DataTableExample(),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    final MaterialStateProperty<MouseCursor?> rowCursor =
        MaterialStateProperty.resolveWith<MouseCursor?>(
      (Set<MaterialState> states) {
        if (states.contains(MaterialState.disabled)) {
          return SystemMouseCursors.forbidden;
        }

        if (states.contains(MaterialState.selected)) {
          return SystemMouseCursors.copy;
        }
        return SystemMouseCursors.grab;
      },
    );

    return Scaffold(
      appBar: AppBar(
        title: const Text('DataTable'),
      ),
      body: DataTable(
        columns: <DataColumn>[
          DataColumn(
            label: const Expanded(
              child: Text(
                'Name',
              ),
            ),
            mouseCursor: MaterialStateProperty.resolveWith(
              (Set<MaterialState> states) {
                if (states.contains(MaterialState.disabled)) {
                  return SystemMouseCursors.forbidden;
                }
                return SystemMouseCursors.grab;
              },
            ),
            onSort: (int columnIndex, bool ascending) {},
          ),
          DataColumn(
            mouseCursor: MaterialStateProperty.resolveWith(
              (Set<MaterialState> states) {
                if (states.contains(MaterialState.disabled)) {
                  return SystemMouseCursors.forbidden;
                }
                return SystemMouseCursors.grab;
              },
            ),
            label: const Expanded(
              child: Text(
                'State',
              ),
            ),
          ),
        ],
        rows: <DataRow>[
          DataRow(
            mouseCursor: rowCursor,
            cells: const <DataCell>[
              DataCell(Text('Row')),
              DataCell(Text('disabled')),
            ],
          ),
          DataRow(
            mouseCursor: rowCursor,
            onSelectChanged: (bool? selected) {},
            cells: const <DataCell>[
              DataCell(Text('Row')),
              DataCell(Text('enabled')),
            ],
          ),
          DataRow(
            mouseCursor: rowCursor,
            selected: true,
            onSelectChanged: (bool? selected) {},
            cells: const <DataCell>[
              DataCell(Text('Row')),
              DataCell(Text('selected')),
            ],
          ),
        ],
      ),
    );
  }
}