fcs/lib/pages/invoice/invoice_editor.dart

import 'package:fcs/domain/entities/box.dart';
import 'package:fcs/domain/entities/cargo_type.dart';
import 'package:fcs/domain/entities/custom_duty.dart';
import 'package:fcs/domain/entities/discount.dart';
import 'package:fcs/domain/entities/invoice.dart';
import 'package:fcs/domain/entities/payment_method.dart';
import 'package:fcs/domain/entities/user.dart';
import 'package:fcs/helpers/theme.dart';
import 'package:fcs/localization/app_translations.dart';
import 'package:fcs/pages/discount/discount_list.dart';
import 'package:fcs/pages/discount/model/discount_model.dart';
import 'package:fcs/pages/main/model/language_model.dart';
import 'package:fcs/pages/main/model/main_model.dart';
import 'package:fcs/pages/main/util.dart';
import 'package:fcs/pages/payment_methods/model/payment_method_model.dart';
import 'package:fcs/pages/rates/custom_list.dart';
import 'package:fcs/pages/rates/model/shipment_rate_model.dart';
import 'package:fcs/pages/user_search/user_serach.dart';
import 'package:fcs/pages/widgets/bottom_up_page_route.dart';
import 'package:fcs/pages/widgets/discount_dropdown.dart';
import 'package:fcs/pages/widgets/display_text.dart';
import 'package:fcs/pages/widgets/fcs_id_icon.dart';
import 'package:fcs/pages/widgets/input_text.dart';
import 'package:fcs/pages/widgets/local_dropdown.dart';
import 'package:fcs/pages/widgets/local_text.dart';
import 'package:fcs/pages/widgets/local_title.dart';
import 'package:fcs/pages/widgets/multi_img_controller.dart';
import 'package:fcs/pages/widgets/multi_img_file.dart';
import 'package:fcs/pages/widgets/my_data_table.dart';
import 'package:fcs/pages/widgets/progress.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_icons/flutter_icons.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:intl/intl.dart';
import 'package:provider/provider.dart';

import 'box_addition.dart';

class InvoiceEditor extends StatefulWidget {
  final Invoice invoice;
  final User customer;
  InvoiceEditor({this.invoice, this.customer});

  @override
  _InvoiceEditorState createState() => _InvoiceEditorState();
}

class _InvoiceEditorState extends State<InvoiceEditor> {
  User user;

  var dateFormatter = new DateFormat('dd MMM yyyy');
  TextEditingController _invoiceNumberController = new TextEditingController();
  TextEditingController _dateController = new TextEditingController();
  TextEditingController _nameController = new TextEditingController();
  TextEditingController _phoneController = new TextEditingController();
  TextEditingController _discountController = new TextEditingController();
  TextEditingController _amountController = new TextEditingController();
  TextEditingController _statusController = new TextEditingController();
  TextEditingController _handlingFeeController = new TextEditingController();
  TextEditingController _customFeeController = new TextEditingController();
  MultiImgController multiImgController = MultiImgController();
  TextEditingController _descriptionController = new TextEditingController();
  TextEditingController _balanceController = new TextEditingController();

  Invoice _invoice;
  bool _isLoading = false;
  List<Box> _boxes = [];
  bool isSwitched = false;
  int deliveryfee = 0;
  double customFee = 10;
  int handlingFee = 0;
  double total = 0;
  Discount _discount;
  bool isNew = false;
  Discount selectedDiscount;
  int selectedDiscountAmt;
  PaymentMethod paymentMethod;
  double volumetricRatio = 0;

  List<Box> selectedBoxes = [];
  List<CustomDuty> customs = [];

  List<CargoType> _cargoTypes = [
    CargoType(name: 'General Cargo', weight: 33, rate: 6),
    CargoType(name: 'Medicine', weight: 33, rate: 7),
    CargoType(name: 'Dangerous Cargo', weight: 33, rate: 8)
  ];

  List<String> _receipts = [
    "assets/buying_online_with_first_last_name.png",
  ];

  @override
  void initState() {
    super.initState();

    volumetricRatio = Provider.of<ShipmentRateModel>(context, listen: false)
        .rate
        .volumetricRatio;

    if (widget.invoice != null) {
      _invoice = widget.invoice;
      _invoiceNumberController.text = _invoice.invoiceNumber;
      _dateController.text = dateFormatter.format(_invoice.invoiceDate);
      _nameController.text = _invoice.customerName;
      _phoneController.text = _invoice.customerPhoneNumber;
      // _amountController.text = _invoice.getAmount.toString();
      _amountController.text = _invoice.amount.toString();
      _statusController.text = _invoice.status.toString();
      _handlingFeeController.text = '0';
      _customFeeController.text = '0';
      // multiImgController.setImageUrls = _receipts;
      _descriptionController.text = 'For Electronics goods';
      _balanceController.text =
          (_invoice.amount - _invoice.receipts[0].amount).toString();
      // _boxes = _invoice.packages;
    } else {
      _dateController.text = dateFormatter.format(DateTime.now());
      _amountController.text = '0';
      _handlingFeeController.text = '0';
      _customFeeController.text = '0';
      _descriptionController.text = '';
      _balanceController.text = '0';
    }

    if (widget.customer != null) {
      user = widget.customer;
      setState(() {
        isNew = true;
      });
    }

    _boxes = [
      Box(
          shipmentNumber: "A202",
          receiverNumber: "3",
          receiverName: "Ko Myo Min",
          boxNumber: "1",
          rate: 7,
          packageType: "General",
          weight: 75,
          status: "Packed",
          receiverAddress: '1 Bo Yar Nyunt St.\nDagon Tsp, Yangon',
          cargoDesc: "Clothes",
          arrivedDate: DateTime(2020, 6, 1),
          width: 10,
          height: 10,
          length: 10,
          // packages: packages,
          // statusHistory: statusHistory,
          cargoTypes: [
            CargoType(name: 'General Cargo', weight: 25),
            CargoType(name: 'Medicine', weight: 20),
            CargoType(name: 'Dangerous Cargo', weight: 30)
          ]),
      Box(
          shipmentNumber: "A202",
          receiverNumber: "3",
          receiverName: "Ko Myo Min",
          boxNumber: "2",
          rate: 7,
          packageType: "General",
          weight: 75,
          status: "Packed",
          cargoDesc: "Clothes",
          arrivedDate: DateTime(2020, 6, 1),
          width: 10,
          height: 10,
          length: 10,
          // statusHistory: statusHistory,
          // packages: packages,
          receiverAddress: '1 Bo Yar Nyunt St.\nDagon Tsp, Yangon',
          cargoTypes: [
            CargoType(name: 'General Cargo', weight: 25),
            CargoType(name: 'Medicine', weight: 20),
            CargoType(name: 'Dangerous Cargo', weight: 30)
          ])
    ];
  }

  @override
  void dispose() {
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    var mainModel = Provider.of<MainModel>(context);
    var discountModel = Provider.of<DiscountModel>(context);
    var paymentMethodModel = Provider.of<PaymentMethodModel>(context);

    final nameBox = DisplayText(
        iconData: Feather.user,
        labelTextKey: 'invoice.customer_name',
        text: user != null ? user.name : '');

    final statusBox = DisplayText(
        text: _statusController.text,
        iconData: Icons.av_timer,
        labelTextKey: 'invoice.status');

    final fcsIDBox = Row(
      children: <Widget>[
        Expanded(
            child: DisplayText(
          text: user != null ? user.fcsID : "",
          labelTextKey: "box.fcs.id",
          icon: FcsIDIcon(),
        )),
        IconButton(
            icon: Icon(Icons.search, color: primaryColor),
            onPressed: () => searchUser(context, callbackUserSelect: (u) {
                  setState(() {
                    this.user = u;
                  });
                })),
      ],
    );

    return LocalProgress(
      inAsyncCall: _isLoading,
      child: Scaffold(
        appBar: AppBar(
          centerTitle: true,
          leading: new IconButton(
            icon: new Icon(CupertinoIcons.back, color: primaryColor),
            onPressed: () => Navigator.of(context).pop(),
          ),
          backgroundColor: Colors.white,
          shadowColor: Colors.transparent,
          title: LocalText(context, 'invoice.form.title',
              color: primaryColor, fontSize: 20),
        ),
        body: Padding(
          padding: const EdgeInsets.all(8.0),
          child: ListView(
            children: <Widget>[
              LocalTitle(textKey: "invoice.customer_info"),
              DisplayText(
                  labelTextKey: 'invoice.date',
                  iconData: Icons.date_range,
                  text: _dateController.text),
              widget.invoice == null
                  ? Container()
                  : DisplayText(
                      labelTextKey: 'invoice.number',
                      iconData: FontAwesomeIcons.fileInvoice,
                      text: _invoiceNumberController.text),
              fcsIDBox,
              nameBox,
              isNew ? statusBox : Container(),
              SizedBox(height: 20),
              LocalTitle(textKey: "invoice.box_info"),
              Center(child: Column(children: getCartonRows(context))),
              SizedBox(height: 20),
              LocalTitle(
                  textKey: "invoice.custom_fee",
                  trailing: IconButton(
                      icon: Icon(Icons.add_circle, color: primaryColor),
                      onPressed: () async {
                        CustomDuty custom = await Navigator.of(context).push(
                            CupertinoPageRoute(
                                builder: (context) => CustomList()));
                        setState(() {
                          if (custom != null) customs.add(custom);
                        });
                      })),
              Column(children: getCustomFeeRows(context)),
              SizedBox(height: 20),
              LocalTitle(textKey: "invoice.cargo_type"),
              Column(children: getCargoTableByBox(context)),
              SizedBox(height: 20),
              Container(
                padding: EdgeInsets.only(top: 5, left: 18),
                child: Row(
                  children: <Widget>[
                    Expanded(
                      child: LocalText(context, 'invoice.payment_method',
                          fontSize: 16,
                          color: Colors.grey,
                          fontWeight: FontWeight.bold),
                    ),
                    Container(
                      width: 150.0,
                      child: DropdownButtonFormField(
                        icon: Icon(
                          Icons.edit,
                          color: primaryColor,
                        ),
                        value: paymentMethod,
                        items: paymentMethodModel.paymentMethods
                            .map((e) => DropdownMenuItem(
                                child: Text(e.name), value: e.name))
                            .toList(),
                        onChanged: (selected) => {},
                      ),
                    ),
                  ],
                ),
              ),
              SizedBox(height: 20),
              LocalTitle(
                  textKey: "invoice.payment_attachment",
                  trailing: IconButton(
                      icon: Icon(Icons.add_circle, color: primaryColor),
                      onPressed: () async {})),
              widget.invoice == null
                  ? fcsButton(
                      context, getLocalString(context, 'invoice.btn_create'))
                  : mainModel.isCustomer()
                      ? Container()
                      : Container(
                          child: Column(
                          children: <Widget>[
                            fcsButton(context,
                                getLocalString(context, 'invoice.btn_save'))
                          ],
                        )),
              isNew
                  ? Container()
                  : fcsButton(context,
                      getLocalString(context, 'invoice.btn_payment_receipt'))
            ],
          ),
        ),
      ),
    );
  }

  getCartonRows(BuildContext context) {
    List<Widget> dataRow = [];

    dataRow = _boxes.map((box) {
      return Container(
        height: 50,
        decoration: BoxDecoration(
            border: Border(bottom: BorderSide(color: Colors.grey))),
        padding:
            const EdgeInsets.only(left: 5.0, right: 5.0, top: 5.0, bottom: 5.0),
        child: Row(
          children: [
            Container(
              width: 33,
              child: Checkbox(
                  value: true, onChanged: (v) {}, activeColor: primaryColor),
            ),
            Expanded(flex: 1, child: Text(box.packageNumber)),
            Expanded(
                flex: 1,
                child: Text(
                    box.length == null
                        ? ""
                        : box.length.toString() +
                            ' x ' +
                            box.length.toString() +
                            ' x ' +
                            box.height.toString(),
                    textAlign: TextAlign.center)),
            Expanded(
                flex: 2,
                child: Center(
                    child: Text(
                        box.getShipmentWeight(volumetricRatio).toString()))),
          ],
        ),
      );
    }).toList();

    dataRow.insert(
        0,
        Container(
          decoration: BoxDecoration(
              border: Border(bottom: BorderSide(color: Colors.grey))),
          padding: const EdgeInsets.only(
              left: 5.0, right: 5.0, top: 5.0, bottom: 15.0),
          child: Row(
            children: [
              Container(width: 33),
              Expanded(
                  flex: 1,
                  child: Center(
                    child: LocalText(
                      context,
                      "invoice.box.number",
                      color: Colors.grey,
                    ),
                  )),
              Expanded(
                  flex: 1,
                  child: Center(
                      child: Text('L x W x H',
                          style: TextStyle(color: Colors.grey)))),
              Expanded(
                  flex: 2,
                  child: Center(
                    child: LocalText(
                      context,
                      "invoice.shipment_weight",
                      color: Colors.grey,
                    ),
                  )),
            ],
          ),
        ));

    return dataRow;
  }

  getCustomFeeRows(BuildContext context) {
    customFee = 0;
    List<Widget> dataRow = [];

    dataRow = customs.map((custom) {
      customFee += custom.fee;
      return Container(
        decoration: BoxDecoration(
            border: Border(bottom: BorderSide(color: Colors.grey))),
        padding:
            const EdgeInsets.only(left: 5.0, right: 5.0, top: 5.0, bottom: 5.0),
        child: Row(
          children: [
            Expanded(flex: 2, child: Text('${custom.productType}')),
            Expanded(
                flex: 1,
                child: Text('\$ ${custom.fee}', textAlign: TextAlign.center)),
            Expanded(
                child: IconButton(
                    icon: Icon(Icons.remove_circle, color: primaryColor),
                    onPressed: () {
                      customs.remove(custom);
                    }))
          ],
        ),
      );
    }).toList();

    dataRow.insert(
        0,
        Container(
          decoration: BoxDecoration(
              border: Border(bottom: BorderSide(color: Colors.grey))),
          padding: const EdgeInsets.only(
              left: 5.0, right: 5.0, top: 15.0, bottom: 15.0),
          child: Row(
            children: [
              Expanded(
                  flex: 2,
                  child: Text('Product', style: TextStyle(color: Colors.grey))),
              Expanded(
                  flex: 1,
                  child: Text('Fee',
                      textAlign: TextAlign.center,
                      style: TextStyle(color: Colors.grey))),
              Expanded(flex: 1, child: Container())
            ],
          ),
        ));

    dataRow.insert(
        dataRow.length,
        Container(
          padding: const EdgeInsets.only(
              left: 5.0, right: 5.0, top: 15.0, bottom: 15.0),
          child: Row(
            children: [
              Expanded(
                flex: 2,
                child: Center(
                  child: LocalText(
                    context,
                    'invoice.total_custom_fee',
                    color: Colors.black,
                    fontWeight: FontWeight.bold,
                  ),
                ),
              ),
              Expanded(
                  flex: 1,
                  child: Center(
                      child: Text('\$ $customFee',
                          textAlign: TextAlign.center,
                          style: TextStyle(fontWeight: FontWeight.bold)))),
              Expanded(
                child: Container(),
              )
            ],
          ),
        ));
    return dataRow;
  }

  getCargoTableByBox(BuildContext context) {
    var discountModel = Provider.of<DiscountModel>(context);
    total = 0;
    List<Widget> dataRow = _cargoTypes.map((cargo) {
      var amount = cargo.weight * cargo.rate;
      total += amount;
      return Container(
        decoration: BoxDecoration(
            border: Border(bottom: BorderSide(color: Colors.grey))),
        padding: const EdgeInsets.only(
            left: 5.0, right: 5.0, top: 15.0, bottom: 15.0),
        child: Row(
          children: [
            Expanded(flex: 2, child: Text('${cargo.name}')),
            Expanded(
                flex: 2,
                child: Text('${cargo.weight} x ${cargo.rate}',
                    textAlign: TextAlign.center)),
            Expanded(
                child: Text('\$ $amount',
                    textAlign: TextAlign.end,
                    style: TextStyle(
                      fontSize: 15,
                      fontWeight: FontWeight.bold,
                    )))
          ],
        ),
      );
    }).toList();
    dataRow.insert(
        0,
        Container(
          padding: const EdgeInsets.only(
              left: 5.0, right: 5.0, top: 15.0, bottom: 15.0),
          decoration: BoxDecoration(
              border: Border(bottom: BorderSide(color: Colors.grey))),
          child: Row(
            children: [
              Expanded(
                  flex: 2,
                  child: Text(getLocalString(context, 'invoice.box.cargo_type'),
                      style: TextStyle(
                          fontSize: 12,
                          fontWeight: FontWeight.bold,
                          color: Colors.grey))),
              Expanded(
                  flex: 2,
                  child: Text(
                      getLocalString(context, 'cargo.weight') +
                          ' x ' +
                          getLocalString(context, 'cargo.rate'),
                      textAlign: TextAlign.center,
                      style: TextStyle(
                          fontSize: 12,
                          fontWeight: FontWeight.bold,
                          color: Colors.grey))),
              Expanded(
                  child: Text(getLocalString(context, 'invoice.amount'),
                      textAlign: TextAlign.end,
                      style: TextStyle(
                          fontSize: 12,
                          fontWeight: FontWeight.bold,
                          color: Colors.grey)))
            ],
          ),
        ));

    dataRow.insert(
        dataRow.length,
        Container(
          padding: const EdgeInsets.only(
              left: 5.0, right: 5.0, top: 10.0, bottom: 10.0),
          child: Row(
            children: [
              Expanded(
                flex: 1,
                child: Container(
                  alignment: Alignment.centerRight,
                  child: LocalText(
                    context,
                    'invoice.total',
                    color: Colors.black,
                  ),
                ),
              ),
              SizedBox(width: 40),
              Expanded(
                  child: Text(
                '\$ $total',
                style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
                textAlign: TextAlign.end,
              ))
            ],
          ),
        ));

    dataRow.insert(
        dataRow.length,
        Container(
          padding: const EdgeInsets.only(left: 5.0, right: 5.0, top: 0),
          child: Row(
            children: [
              Expanded(
                flex: 1,
                child: Container(
                  alignment: Alignment.centerRight,
                  child: LocalText(
                    context,
                    'invoice.discount_value',
                    color: Colors.black,
                  ),
                ),
              ),
              new IconButton(
                  icon: Icon(Icons.search, color: primaryColor),
                  onPressed: () async {
                    Discount discount = await Navigator.of(context).push(
                        CupertinoPageRoute(
                            builder: (context) =>
                                DiscountList(selected: true)));
                    setState(() {
                      if (discount != null) _discount = discount;
                    });
                  }),
              Expanded(
                  child: Text(
                      '\$ ( ${_discount != null ? _discount.amount.toInt() : 0} )',
                      textAlign: TextAlign.end,
                      style: TextStyle(
                        fontSize: 15,
                        fontWeight: FontWeight.bold,
                      )))
            ],
          ),
        ));

    dataRow.insert(
        dataRow.length,
        Container(
          padding: const EdgeInsets.only(
              left: 5.0, right: 5.0, top: 10.0, bottom: 0.0),
          child: Row(
            children: [
              Expanded(
                flex: 1,
                child: Container(
                  alignment: Alignment.centerRight,
                  child: LocalText(
                    context,
                    'invoice.custom_fee',
                    color: Colors.black,
                  ),
                ),
              ),
              SizedBox(width: 40),
              Expanded(
                child: Text('\$ ${customFee}',
                    textAlign: TextAlign.end,
                    style: TextStyle(
                      fontSize: 15,
                      fontWeight: FontWeight.bold,
                    )),
              ),
            ],
          ),
        ));

    dataRow.insert(
        dataRow.length,
        Container(
          padding: const EdgeInsets.only(left: 5.0, right: 5.0, top: 20.0),
          child: Row(
            children: [
              Expanded(
                flex: 1,
                child: Container(
                  alignment: Alignment.centerRight,
                  child: LocalText(
                    context,
                    'invoice.handling_fee',
                    color: Colors.black,
                  ),
                ),
              ),
              new IconButton(
                  icon: Icon(Icons.edit, color: primaryColor),
                  onPressed: () async {}),
              Expanded(
                  child: Text('\$ $handlingFee',
                      textAlign: TextAlign.end,
                      style: TextStyle(
                        fontSize: 15,
                        fontWeight: FontWeight.bold,
                      )))
            ],
          ),
        ));

    dataRow.insert(
        dataRow.length,
        Container(
          padding: const EdgeInsets.only(
              left: 5.0, right: 5.0, top: 10.0, bottom: 10.0),
          child: Row(
            children: [
              Expanded(
                  flex: 1,
                  child: Container(
                    alignment: Alignment.centerRight,
                    child: LocalText(
                      context,
                      'invoice.delivery_fee',
                      color: Colors.black,
                    ),
                  )),
              Switch(
                value: isSwitched,
                onChanged: (value) {
                  setState(() {
                    isSwitched = value;
                    if (value) {
                      deliveryfee = 5;
                    } else {
                      deliveryfee = 0;
                    }
                    print(isSwitched);
                  });
                },
                activeTrackColor: primaryColor.withOpacity(0.8),
                activeColor: primaryColor,
              ),
              Expanded(
                  child: Text('\$ $deliveryfee',
                      textAlign: TextAlign.end,
                      style: TextStyle(
                        fontSize: 15,
                        fontWeight: FontWeight.bold,
                      )))
            ],
          ),
        ));

    dataRow.insert(
        dataRow.length,
        Container(
            child: Row(
          children: [
            Expanded(child: Text('')),
            Expanded(
                flex: 2,
                child: Divider(
                  thickness: 3,
                )),
          ],
        )));

    dataRow.insert(
        dataRow.length,
        Container(
          padding: const EdgeInsets.only(
              left: 5.0, right: 5.0, top: 10.0, bottom: 10.0),
          child: Row(
            children: [
              Expanded(
                flex: 2,
                child: Center(
                  child: LocalText(
                    context,
                    'invoice.net_amount',
                    color: Colors.black,
                    fontSize: 15,
                    fontWeight: FontWeight.bold,
                  ),
                ),
              ),
              Expanded(
                  child: Text('\$ ${getTotalBalance(total)}',
                      textAlign: TextAlign.end,
                      style: TextStyle(
                          fontSize: 18,
                          fontWeight: FontWeight.bold,
                          color: primaryColor)))
            ],
          ),
        ));

    dataRow.insert(
        dataRow.length,
        Container(
          padding: const EdgeInsets.only(
              left: 5.0, right: 5.0, top: 10.0, bottom: 10.0),
          child: Row(
            children: [
              Expanded(
                flex: 2,
                child: Center(
                  child: LocalText(
                    context,
                    'invoice.balance',
                    color: Colors.black,
                    fontSize: 15,
                    fontWeight: FontWeight.bold,
                  ),
                ),
              ),
              Expanded(
                  child: Text('\$ ${getTotalBalance(total)}',
                      textAlign: TextAlign.end,
                      style: TextStyle(
                          fontSize: 18,
                          fontWeight: FontWeight.bold,
                          color: primaryColor)))
            ],
          ),
        ));

    return dataRow;
  }

  getTotalBalance(total) {
    double balance = 0;
    double custom = customFee != 0 ? customFee.toDouble() : 0;
    double discount = _discount != null ? _discount.amount.toDouble() : 0;
    double deliveryFee = deliveryfee != 0 ? deliveryfee.toDouble() : 0;
    balance = (total + custom + deliveryFee) - discount;
    return balance;
  }

  List<MyDataRow> getBoxRow(BuildContext context) {
    return _boxes.map((p) {
      p.cargoTypes.map((cargo) {
        _cargoTypes.asMap().map((index, _cargo) {
          if (_cargo.id == cargo.id) {
            setState(() {
              _cargoTypes[index].weight += cargo.weight;
            });
          }
        });
      });
      return MyDataRow(
        onSelectChanged: (bool selected) {},
        cells: [
          MyDataCell(Checkbox(
            value: true,
            onChanged: (value) {
              selectedBoxes.add(p);
            },
          )),
          MyDataCell(new Text(
            p.boxNumber == null
                ? ""
                : '${p.shipmentNumber}-${p.receiverNumber} #${p.boxNumber}',
            style: textStyle,
          )),
          MyDataCell(new Text(
            p.length == null
                ? ""
                : p.length.toString() +
                    ' x ' +
                    p.length.toString() +
                    ' x ' +
                    p.height.toString(),
            style: textStyle,
          )),
        ],
      );
    }).toList();
  }

  List<MyDataRow> getCargoDataRow(BuildContext context) {
    return _cargoTypes.asMap().entries.map((c) {
      var cargo = c.value;
      var amt = cargo.weight * cargo.rate;
      return MyDataRow(
        onSelectChanged: (bool selected) {},
        cells: [
          MyDataCell(new Text(
            cargo.name,
            style: textStyle,
          )),
          MyDataCell(new Text(
            cargo.weight.toString() + ' x ' + cargo.rate.toString(),
            style: textStyle,
          )),
          MyDataCell(new Text(
            "\$$amt",
            style: textStyle,
          )),
        ],
      );
    }).toList()
        // .insert(_cargoTypes.length,MyDataRow(cells: [
        //   MyDataCell(new Text('')),
        //   MyDataCell(new Text('Total')),
        //   MyDataCell(new Text(
        //     "\$5000",
        //     style: textStyle,
        //   )),
        // ])
        // )
        ;
  }
}