cssd/lib/pages/TestPages/test_add_screen.dart

import 'package:barcode_scan2/barcode_scan2.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:provider/provider.dart';

import '../../config/routes.dart';
import '../../providers/connectivity.dart';
import '../../providers/test_results.dart';
import '../../widgets/Global/internet_error.dart';
import '../../widgets/TestResultScreens/Add/selector_box.dart';

class TestResultAddScreen extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _TestResultAddScreenState();
  }
}

class _TestResultAddScreenState extends State<TestResultAddScreen> {
  TextEditingController testTypeCTRL = new TextEditingController();
  final List<String> testTypeVals = [];

  TextEditingController testCodeCTRL = new TextEditingController();
  bool isInit = true;

  @override
  void didChangeDependencies() {
    if (isInit) {
      var testResultProviderObject =
          Provider.of<TestResultsProvider>(context, listen: false);
      testResultProviderObject.resetTests();
      testResultProviderObject.getFilterItems().then((result) {
        for (var testType in result[1].keys) {
          testTypeVals.add(testType);
        }
        testTypeCTRL.text = testTypeVals[0];
        setState(() {
          isInit = false;
        });
      });
    }
    super.didChangeDependencies();
  }

  @override
  Widget build(BuildContext context) {
    final _media = MediaQuery.of(context);
    // final double _pixelRatio = (_media.size.height / _media.size.width * 7 / 5);
    final double _devicewidth = _media.size.width;
    final double _deviceBlockSize = _devicewidth / 100;
    return SafeArea(
      child: Scaffold(
        appBar: AppBar(
          titleSpacing: -10,
          title: Text(
            'Test Results',
            style: TextStyle(
              color: Colors.white,
            ),
          ),
          backgroundColor: Colors.black,
          leading: IconButton(
            icon: Icon(
              Icons.keyboard_arrow_left,
              color: Colors.white,
              size: 35,
            ),
            // padding: EdgeInsets.all(0),
            onPressed: () =>
                Navigator.of(context).popAndPushNamed(Routes.testResultScreen),
          ),
        ),
        body: Consumer<ConnectivityProvider>(
          builder: (ct, connection, _) {
            return connection.conStatus != 'offline'
                ? isInit
                    ? Center(
                        child: CircularProgressIndicator(
                          color: Colors.black,
                        ),
                      )
                    : ListView(
                        padding:
                            EdgeInsets.symmetric(horizontal: 20, vertical: 20),
                        children: <Widget>[
                          Container(
                            padding: EdgeInsets.only(
                              top: 10,
                            ),
                            child: Text(
                              'Add a Test Result',
                              style: TextStyle(
                                color: Colors.black,
                                fontSize: 5 * _deviceBlockSize,
                                letterSpacing: 3,
                                fontWeight: FontWeight.w700,
                              ),
                            ),
                          ),
                          GestureDetector(
                            child: Container(
                              margin: EdgeInsets.only(top: 5, bottom: 30),
                              padding: EdgeInsets.all(10),
                              height: 200,
                              decoration: BoxDecoration(border: Border.all()),
                              child: Center(
                                child: Text(
                                  'PLease Scan The Test Barcode',
                                  textAlign: TextAlign.center,
                                  style: TextStyle(
                                    color: Colors.grey,
                                    fontSize: 5 * _deviceBlockSize,
                                    fontWeight: FontWeight.w100,
                                    letterSpacing: 3,
                                  ),
                                ),
                              ),
                            ),
                            onTap: () {
                              scan().then(
                                (String result) {
                                  if (result == 'cancel') {
                                    print('cancel');
                                  } else if (result == 'error') {
                                    print('error');
                                  } else if (result == 'access') {
                                    print('access');
                                  } else {
                                    Provider.of<TestResultsProvider>(
                                      context,
                                      listen: false,
                                    ).testCode = result;
                                    Navigator.pushNamed(
                                      context,
                                      Routes.formTestResultScreen,
                                      arguments: result,
                                    );
                                  }
                                },
                              );
                            },
                          ),
                          Row(
                            mainAxisAlignment: MainAxisAlignment.center,
                            crossAxisAlignment: CrossAxisAlignment.center,
                            mainAxisSize: MainAxisSize.max,
                            children: <Widget>[
                              Column(
                                crossAxisAlignment: CrossAxisAlignment.center,
                                children: <Widget>[
                                  Container(
                                    width: 70 * _deviceBlockSize,
                                    child: TestResultAddSelectorBox(
                                      deviceBlockSize: _deviceBlockSize,
                                      dataCTRL: testTypeCTRL,
                                      dataVals: testTypeVals,
                                      label: 'Choose a Test Type',
                                    ),
                                  ),
                                  Row(
                                    crossAxisAlignment: CrossAxisAlignment.end,
                                    children: <Widget>[
                                      Text(
                                        'OR',
                                        style: TextStyle(
                                          fontWeight: FontWeight.w700,
                                          fontSize: 7 * _deviceBlockSize,
                                        ),
                                      ),
                                      SizedBox(
                                        width: 8 * _deviceBlockSize,
                                      ),
                                      Container(
                                        width: 50 * _deviceBlockSize,
                                        child: TextFormField(
                                          onChanged: (val) {
                                            if (val != '') {
                                              setState(
                                                () {
                                                  testTypeCTRL.text = '';
                                                },
                                              );
                                            } else {
                                              setState(
                                                () {
                                                  testTypeCTRL.text =
                                                      testTypeVals[0];
                                                },
                                              );
                                            }
                                          },
                                          controller: testCodeCTRL,
                                          decoration: InputDecoration(
                                            isDense: true,
                                            icon: Icon(
                                              FontAwesomeIcons.sortNumericDown,
                                            ),
                                            labelText: 'Enter a Test Code',
                                            labelStyle: TextStyle(
                                              fontSize: 3 * _deviceBlockSize,
                                            ),
                                            contentPadding: EdgeInsets.only(
                                              bottom: 5,
                                              top: 5,
                                            ),
                                          ),
                                          keyboardType:
                                              TextInputType.visiblePassword,
                                        ),
                                      ),
                                    ],
                                  ),
                                  SizedBox(
                                    height: 40.0,
                                  ),
                                  Container(
                                    padding: EdgeInsets.symmetric(
                                      horizontal: 5 * _deviceBlockSize,
                                      vertical: 10,
                                    ),
                                    width: 50 * _deviceBlockSize,
                                    decoration: BoxDecoration(
                                      color: Colors.black,
                                      borderRadius: BorderRadius.circular(7),
                                    ),
                                    child: Align(
                                      alignment: Alignment.center,
                                      child: TextButton(
                                        child: Text(
                                          'Select',
                                          style: TextStyle(
                                            color: Colors.white,
                                            fontSize: 5 * _deviceBlockSize,
                                          ),
                                        ),
                                        onPressed: () {
                                          if (testCodeCTRL.text != '') {
                                            Provider.of<TestResultsProvider>(
                                              context,
                                              listen: false,
                                            ).testCode = testCodeCTRL.text;
                                            Navigator.pushNamed(
                                              context,
                                              Routes.formTestResultScreen,
                                              arguments: testCodeCTRL.text,
                                            );
                                          } else if (testTypeCTRL.text != '') {
                                            Provider.of<TestResultsProvider>(
                                              context,
                                              listen: false,
                                            ).testType = testTypeCTRL.text;
                                            Navigator.pushReplacementNamed(
                                              context,
                                              Routes.formTestResultScreen,
                                              arguments: testTypeCTRL.text,
                                            );
                                          }
                                          // print(testCode);
                                        },
                                      ),
                                    ),
                                  ),
                                ],
                              ),
                              SizedBox(
                                width: 5 * _deviceBlockSize,
                              ),
                            ],
                          ),
                        ],
                      )
                : ConnectionErrorBox();
          },
        ),
      ),
    );
  }

  Future<String> scan() async {
    try {
      var barcode = await BarcodeScanner.scan();
      if (barcode.type.name == 'Cancelled') {
        return 'cancel';
      } else if (barcode.type.name == 'Failed') {
        return 'error';
      }
      return barcode.rawContent;
    } on PlatformException catch (_) {
      return 'access';
    } catch (_) {
      return 'error';
    }
  }
}