fcs/lib/pages/barcode_screen_page.dart

import 'package:barcode_scan/barcode_scan.dart';
import 'package:barcode_scan/model/scan_result.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:provider/provider.dart';
import 'package:fcs/model/product_model.dart';
import 'package:fcs/theme/theme.dart';
import 'package:fcs/vo/buyer.dart';
import 'package:fcs/vo/product.dart';
import 'package:fcs/widget/progress.dart';

class BarcodeScreenPage extends StatefulWidget {
  final BuyerProduct buyerProduct;
  const BarcodeScreenPage({Key key, this.buyerProduct}) : super(key: key);
  @override
  _BarcodeScreenPageState createState() => _BarcodeScreenPageState();
}

class _BarcodeScreenPageState extends State<BarcodeScreenPage> {
  final _formKey = GlobalKey<FormState>();
  bool _isLoading = false;
  ScanResult scanResult;

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

  Widget showProducts(BuildContext context, ProductModel productModel) {
    return Row(
      mainAxisSize: MainAxisSize.max,
      children: <Widget>[
        Icon(
          FontAwesomeIcons.tag,
          color: primaryColor,
          size: 20,
        ),
        SizedBox(
          width: 20,
        ),
        new Flexible(
          child: Container(
            width: 170.0,
            child: DropdownButton<String>(
              // value: currentProductID,
              isExpanded: true,
              hint: Text(
                'Select Product',
                style: labelStyle,
              ),
              onChanged: changedProduct,
              items: productModel.products
                  .map<DropdownMenuItem<String>>((Product product) {
                return new DropdownMenuItem<String>(
                  value: product.id,
                  child: new Text(product.name, style: textStyle),
                );
              }).toList(),
            ),
          ),
        ),
      ],
    );
  }

  void changedProduct(selected) {
    setState(() {
      // currentProductID = selected;
    });
  }

  @override
  Widget build(BuildContext context) {
    return LocalProgress(
      inAsyncCall: _isLoading,
      child: Scaffold(
          appBar: AppBar(
            backgroundColor: primaryColor,
            title: Text("Bar Code Scranner"),
          ),
          body: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
              RaisedButton(
                child: Icon(Icons.scanner),
                onPressed: () async {
                  await scan();
                },
              )
            ],
          )),
    );
  }

  Future scan() async {
    var result = await BarcodeScanner.scan();
    print("ScanResult => $result");
    setState(() => scanResult = result);
  }

  // _save() {
  //   if (currentProductID == null) return;
  //   this.buyerProduct.productID = currentProductID;
  //   var productName =
  //       Provider.of<ProductModel>(context).getProductName(currentProductID);
  //   this.buyerProduct.productName = productName;
  //   this.buyerProduct.storageCapacityQty = int.parse(_storage.text);
  //   this.buyerProduct.dailySaleQty = int.parse(_sales.text);
  //   Navigator.pop<BuyerProduct>(context, this.buyerProduct);
  // }
}