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 PopScope(
      canPop: false,
      onPopInvoked: (didPop) {
        if (didPop) return;
        Navigator.of(context).pushNamed(Routes.homePage);
        // Navigator.pushReplacementNamed(
        //   context,
        //   Routes.testResultScreen,
        // );
        // return true;
      },
      child: 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';
    }
  }
}