KonectarApp/lib/contacts_module/ui_screen/trends.dart

import 'package:konectar_events/contacts_module/custom_widget/floating_btn.dart';
import 'package:konectar_events/contacts_module/custom_widget/show_alert.dart';
import 'package:konectar_events/contacts_module/hive_fun.dart';
import 'package:flutter/material.dart';

class Trends extends StatefulWidget {
  const Trends({super.key});

  @override
  State<Trends> createState() => _TrendsState();
}

class _TrendsState extends State<Trends> {
  late _DataSource _dataSource; // Instance variable for _DataSource
  @override
  void initState() {
    super.initState();
    print("hii_initState");
    _dataSource = _DataSource(context);
  }

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Scaffold(
        body: ListView(
          padding: const EdgeInsets.all(3),
          children: [
            PaginatedDataTable(
              header: const Text(
                'HCP RANKING',
                style: TextStyle(
                    fontWeight: FontWeight.bold,
                    fontSize: 18.0,
                    fontStyle: FontStyle.normal),
              ),
              showFirstLastButtons: true,
              showEmptyRows: false,
              showCheckboxColumn: true,
              // actions: const [Text("jii")],
              rowsPerPage: 5,
              columns: const [
                DataColumn(
                    label: Text('Name',
                        style: TextStyle(
                            fontWeight: FontWeight.bold,
                            fontSize: 14.0,
                            fontStyle: FontStyle.normal))),
                DataColumn(
                    label: Text('Last 5 Years',
                        style: TextStyle(
                            fontWeight: FontWeight.bold,
                            fontSize: 14.0,
                            fontStyle: FontStyle.normal))),
                DataColumn(
                    label: Text('Last 3 Years',
                        style: TextStyle(
                            fontWeight: FontWeight.bold,
                            fontSize: 14.0,
                            fontStyle: FontStyle.normal))),
                DataColumn(
                    label: Text('Last 1 Year',
                        style: TextStyle(
                            fontWeight: FontWeight.bold,
                            fontSize: 14.0,
                            fontStyle: FontStyle.normal))),
              ],
              source: _dataSource,
            ),
          ],
        ),
        floatingActionButton: Visibility(
            visible: true,
            child: FloatingBtn(
              icon: Icons.add,
              title: "add",
              onTap: () {
                List<String> selectedRowIds = _dataSource.getSelectedRowIds();
                // Do something with selectedRowIds
                print('Selected Row IDstrndsss: $selectedRowIds');

                for (int i = 0; i < selectedRowIds.length; i++) {
                  print("checking_value_istrends: ${selectedRowIds[i]}");

                  // _contactbox.put(i, selectedRowIds[i]);

                  HiveFunctions.createUser({
                    "name": selectedRowIds[i],
                    "org": "Azienda Ospedaliera di Padova",
                    "adrr": "Via Giustiniani 2, Padova, Veneto 35128, Italy",
                    "phone": "+390498212410X12",
                    "Pphone": "+390498212410X12",
                    "email": "Gerosa,Gino@gmail.com",
                    "affno": "75",
                    "eveno": "8",
                    "pubno": "251",
                    "trailno": "1"
                  });
                }
                showDialog(
                    context: context,
                    builder: (_) {
                      return Alert(
                        data: "User Added Successfully",
                        onPressed: () {
                          Navigator.of(context).pop();
                        },
                      );
                    });
              },
            )),
      ),
    );
  }
}

class _Row {
  _Row(this.identifier, this.valueA, this.valueC, this.valueD, this.valueE);

  final int identifier;
  final String valueA;
  final String valueC;
  final IconData valueD;
  final IconData valueE;

  bool selected = false;
}

class _DataSource extends DataTableSource {
  // _DataSource(this.context) {

  // late BuildContext context;
  // late List<_Row> _rows;
  final BuildContext context;
  late List<_Row> _rows;

  final List<String> _selectedRowIds = [];

  _DataSource(this.context) {
    _rows = <_Row>[
      for (int i = 0; i < 20; i++)
        _Row(
          i,
          'Gerosa, Gino',
          '1',
          Icons.arrow_upward_sharp,
          Icons.arrow_downward_rounded,
        ),
    ];
    //}
  }
  List<String> getSelectedRowIds() {
    return _selectedRowIds; // Return a copy to prevent direct modification
  }

  int _selectedCount = 0;

  @override
  DataRow? getRow(int index) {
    assert(index >= 0);
    if (index >= _rows.length) return null;
    final row = _rows[index];
    return DataRow.byIndex(
      index: index,
      selected: row.selected,

      // onSelectChanged: (value) {
      //   // print("hii");
      //   Navigator.push(
      //       context, MaterialPageRoute(builder: (context) => Profile()));
      // },

      onSelectChanged: (value) {
        if (row.selected != value) {
          // _selectedCount += value! ? 1 : -1;
          // assert(_selectedCount >= 0);
          row.selected = value!;
          if (value) {
            print("Selected");
            _selectedRowIds.add(row.valueA); // Add the row ID to the list
            print("Selected_selectedRowIds :$_selectedRowIds");
          } else {
            _selectedRowIds
                .remove(row.valueA); // Remove the row ID from the list
          }
          notifyListeners();
        }
      },
      cells: [
        DataCell(Text(row.valueA)),
        DataCell(Text(row.valueC)),
        const DataCell(
          Row(
            children: [
              Icon(
                Icons.arrow_drop_up,
                color: Colors.green,
              ),
              SizedBox(width: 8), // Adding some space between icon and text
              Text("1"),
            ],
          ),

          // Text
        ),
        const DataCell(
          Row(
            children: [
              Icon(
                Icons.arrow_drop_down,
                color: Colors.red,
              ),
              SizedBox(width: 8), // Adding some space between icon and text
              Text("1"),
            ],
          ),
        ),
      ],
    );
  }

  @override
  int get rowCount => _rows.length;

  @override
  bool get isRowCountApproximate => false;

  @override
  int get selectedRowCount => _selectedCount;
}