[MOD-2478] iOS: Cancel does not work on ti.barcode when scanning

    var Barcode = require('ti.barcode');
     
    Barcode.allowRotation = true;
    Barcode.displayedMessage = 'Place barcode inside rectangle';
    Barcode.allowMenu = false;
    Barcode.allowInstructions = true;
    Barcode.useLED = true;
     
    var isiOS = Ti.Platform.osname === 'iphone' || Ti.Platform.osname === 'android';
    var isAndroid = Ti.Platform.osname === 'android';
     
    var window = Ti.UI.createWindow({
        backgroundColor: 'white'
    });
     
    var scrollView = Ti.UI.createScrollView({
        contentWidth: 'auto',
        contentHeight: 'auto',
        top: 0,
        showVerticalScrollIndicator: true,
        layout: 'vertical'
    });
     
    /**
     * Create a chrome for the barcode scanner.
     */
    var overlay = Ti.UI.createView({
        backgroundColor: 'transparent',
        top: 0,
        right: 0,
        bottom: 0,
        left: 0
    });
     
    var switchButton = Ti.UI.createButton({
        title: Barcode.useFrontCamera ? 'Back Camera' : 'Front Camera',
        textAlign: 'center',
        color: '#000',
        backgroundColor: '#fff',
        style: 0,
        font: {
            fontWeight: 'bold',
            fontSize: 16
        },
        borderColor: '#000',
        borderRadius: 10,
        borderWidth: 1,
        opacity: 0.5,
        width: 220,
        height: 30,
        bottom: 10
    });
     
    switchButton.addEventListener('click', function() {
        Barcode.useFrontCamera = !Barcode.useFrontCamera;
        switchButton.title = Barcode.useFrontCamera ? 'Back Camera' : 'Front Camera';
    });
     
    overlay.add(switchButton);
     
    var cancelButton = Ti.UI.createButton({
        title: 'Cancel',
        textAlign: 'center',
        color: '#000',
        backgroundColor: '#fff',
        style: 0,
        font: {
            fontWeight: 'bold',
            fontSize: 16
        },
        borderColor: '#000',
        borderRadius: 10,
        borderWidth: 1,
        opacity: 0.5,
        width: 220,
        height: 30,
        top: 20
    });
    cancelButton.addEventListener('click', function() {
        Barcode.cancel();
    });
    overlay.add(cancelButton);
     
    /**
     * Create a button that will trigger the barcode scanner.
     */
    var scanCode = Ti.UI.createButton({
        title: 'Scan the Code',
        width: 150,
        height: 60,
        top: 20
    });
     
    var cameraPermission = function(callback) {
        if (isAndroid) {
            if (Ti.Media.hasCameraPermissions()) {
                if (callback) {
                    callback(true);
                }
            } else {
                Ti.Media.requestCameraPermissions(function(e) {
                    if (e.success) {
                        if (callback) {
                            callback(true);
                        }
                    } else {
                        if (callback) {
                            callback(false);
                        }
                        alert('No camera permission');
                    }
                });
            }
        }
     
        if (isiOS) {
            if (callback) {
                callback(true);
            }
        }
    };
     
    scanCode.addEventListener('click', function() {
        cameraPermission(function(re) {
            reset();
            // Note: while the simulator will NOT show a camera stream in the simulator, you may still call "Barcode.capture"
            // to test your barcode scanning overlay.
            Barcode.capture({
                animate: true,
                overlay: overlay,
                showCancel: false,
                showRectangle: false,
                keepOpen: false
                /*,
                        acceptedFormats: [
                            Barcode.FORMAT_QR_CODE
                        ]*/
            });
        });
    });
    scrollView.add(scanCode);
     
     
    /**
     * Create a button that will show the gallery picker.
     */
    var scanImage = Ti.UI.createButton({
        title: 'Scan Image from Gallery',
        width: 150,
        height: 60,
        top: 20
    });
     
    scanImage.addEventListener('click', function() {
        reset();
        Ti.Media.openPhotoGallery({
            success: function(evt) {
                Barcode.parse({
                    image: evt.media
                    /*,
                                    acceptedFormats: [
                                        Barcode.FORMAT_QR_CODE
                                    ]*/
                });
            }
        });
    });
     
    scrollView.add(scanImage);
     
    /**
     * Now listen for various events from the Barcode module. This is the module's way of communicating with us.
     */
     
    var scannedBarcodes = {},
        scannedBarcodesCount = 0;
     
    function reset() {
        scannedBarcodes = {};
        scannedBarcodesCount = 0;
        cancelButton.title = 'Cancel';
     
        scanResult.text = ' ';
        scanContentType.text = ' ';
        scanFormat.text = ' ';
        scanParsed.text = ' ';
    }
     
    Barcode.addEventListener('error', function(e) {
        scanContentType.text = ' ';
        scanFormat.text = ' ';
        scanParsed.text = ' ';
        scanResult.text = e.message;
        console.log('An Error occured: ' + e);
    });
     
    Barcode.addEventListener('cancel', function(e) {
        Ti.API.info('Cancel received');
    });
     
    var alert = Ti.UI.createAlertDialog();
    
    Barcode.addEventListener('success', function(e) {
        Ti.API.info('Success called with barcode: ' + e.result);
        if (!scannedBarcodes['' + e.result]) {
            scannedBarcodes[e.result] = true;
            scannedBarcodesCount += 1;
            cancelButton.title = 'Finished (' + scannedBarcodesCount + ' Scanned)';
     
            scanResult.text += e.result + ' ';
            scanContentType.text += parseContentType(e.contentType) + ' ';
            scanFormat.text += e.format + ' ';
            scanParsed.text += parseResult(e) + ' ';
        }
        // break it with an alert
        var message = 'Found barcode as ' + e.result;
        setTimeout(function(e){ 
            alert['title'] = message;
            alert.show();
        }, 1000);
    });
     
    /**
     * Finally, we'll add a couple labels to the window. When the user scans a barcode, we'll stick information about it in
     * to these labels.
     */
    scrollView.add(Ti.UI.createLabel({
        text: 'You may need to rotate the device',
        top: 10,
        height: Ti.UI.SIZE || 'auto',
        width: Ti.UI.SIZE || 'auto'
    }));
     
    scrollView.add(Ti.UI.createLabel({
        text: 'Result: ',
        textAlign: 'left',
        top: 10,
        left: 10,
        color: 'black',
        height: Ti.UI.SIZE || 'auto'
    }));
     
    var scanResult = Ti.UI.createLabel({
        text: ' ',
        textAlign: 'left',
        top: 10,
        left: 10,
        color: 'black',
        height: Ti.UI.SIZE || 'auto'
    });
     
    scrollView.add(scanResult);
     
    scrollView.add(Ti.UI.createLabel({
        text: 'Content Type: ',
        top: 10,
        left: 10,
        textAlign: 'left',
        color: 'black',
        height: Ti.UI.SIZE || 'auto'
    }));
     
    var scanContentType = Ti.UI.createLabel({
        text: ' ',
        textAlign: 'left',
        top: 10,
        left: 10,
        color: 'black',
        height: Ti.UI.SIZE || 'auto'
    });
     
    scrollView.add(scanContentType);
     
    scrollView.add(Ti.UI.createLabel({
        text: 'Format: ',
        textAlign: 'left',
        top: 10,
        left: 10,
        color: 'black',
        height: Ti.UI.SIZE || 'auto'
    }));
     
    var scanFormat = Ti.UI.createLabel({
        text: ' ',
        textAlign: 'left',
        top: 10,
        left: 10,
        color: 'black',
        height: Ti.UI.SIZE || 'auto'
    });
     
    scrollView.add(scanFormat);
     
    scrollView.add(Ti.UI.createLabel({
        text: 'Parsed: ',
        textAlign: 'left',
        top: 10,
        left: 10,
        color: 'black',
        height: Ti.UI.SIZE || 'auto'
    }));
     
    var scanParsed = Ti.UI.createLabel({
        text: ' ',
        textAlign: 'left',
        top: 10,
        left: 10,
        color: 'black',
        height: Ti.UI.SIZE || 'auto'
    });
     
    scrollView.add(scanParsed);
     
    function parseContentType(contentType) {
        switch (contentType) {
            case Barcode.URL:
                return 'URL';
            case Barcode.SMS:
                return 'SMS';
            case Barcode.TELEPHONE:
                return 'TELEPHONE';
            case Barcode.TEXT:
                return 'TEXT';
            case Barcode.CALENDAR:
                return 'CALENDAR';
            case Barcode.GEOLOCATION:
                return 'GEOLOCATION';
            case Barcode.EMAIL:
                return 'EMAIL';
            case Barcode.CONTACT:
                return 'CONTACT';
            case Barcode.BOOKMARK:
                return 'BOOKMARK';
            case Barcode.WIFI:
                return 'WIFI';
            default:
                return 'UNKNOWN';
        }
    }
     
    function parseResult(event) {
        var msg = '';
        switch (event.contentType) {
            case Barcode.URL:
                msg = 'URL = ' + event.result;
                break;
            case Barcode.SMS:
                msg = 'SMS = ' + JSON.stringify(event.data);
                break;
            case Barcode.TELEPHONE:
                msg = 'Telephone = ' + event.data.phonenumber;
                break;
            case Barcode.TEXT:
                msg = 'Text = ' + event.result;
                break;
            case Barcode.CALENDAR:
                msg = 'Calendar = ' + JSON.stringify(event.data);
                break;
            case Barcode.GEOLOCATION:
                msg = 'Geo = ' + JSON.stringify(event.data);
                break;
            case Barcode.EMAIL:
                msg = 'Email = ' + event.data.email + '\nSubject = ' + event.data.subject + '\nMessage = ' + event.data.message;
                break;
            case Barcode.CONTACT:
                msg = 'Contact = ' + JSON.stringify(event.data);
                break;
            case Barcode.BOOKMARK:
                msg = 'Bookmark = ' + JSON.stringify(event.data);
                break;
            case Barcode.WIFI:
                return 'WIFI = ' + JSON.stringify(event.data);
            default:
                msg = 'unknown content type';
                break;
        }
        return msg;
    }
    window.add(scrollView);
    window.open();