annotatedurl.cpp Example File

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 #include "annotatedurl.h"

 #include <QtNfc/qnearfieldmanager.h>
 #include <QtNfc/qnearfieldtarget.h>
 #include <QtNfc/qndefmessage.h>
 #include <QtNfc/qndefrecord.h>
 #include <QtNfc/qndefnfctextrecord.h>
 #include <QtNfc/qndefnfcurirecord.h>

 #include <QtWidgets/QGridLayout>
 #include <QtWidgets/QLabel>
 #include <QtGui/QMouseEvent>
 #include <QtGui/QDesktopServices>
 #include <QtCore/QDebug>
 #include <QtCore/QLocale>
 #include <QtCore/QUrl>

 AnnotatedUrl::AnnotatedUrl(QObject *parent)
 :   QObject(parent)
 {
     manager = new QNearFieldManager(this);
     if (!manager->isAvailable()) {
         qWarning() << "NFC not available";
         return;
     }

     QNdefFilter filter;
     filter.setOrderMatch(false);
     filter.appendRecord<QNdefNfcTextRecord>(1, UINT_MAX);
     filter.appendRecord<QNdefNfcUriRecord>();
     // type parameter cannot specify substring so filter for "image/" below
     filter.appendRecord(QNdefRecord::Mime, QByteArray(), 0, 1);

     int result = manager->registerNdefMessageHandler(filter, this,
                                        SLOT(handleMessage(QNdefMessage,QNearFieldTarget*)));

     if (result < 0)
         qWarning() << "Platform does not support NDEF message handler registration";

     manager->startTargetDetection();
     connect(manager, &QNearFieldManager::targetDetected,
             this, &AnnotatedUrl::targetDetected);
     connect(manager, &QNearFieldManager::targetLost,
             this, &AnnotatedUrl::targetLost);
 }

 AnnotatedUrl::~AnnotatedUrl()
 {

 }

 void AnnotatedUrl::targetDetected(QNearFieldTarget *target)
 {
     if (!target)
         return;

     connect(target, &QNearFieldTarget::ndefMessageRead,
             this, &AnnotatedUrl::handlePolledNdefMessage);
     target->readNdefMessages();
 }

 void AnnotatedUrl::targetLost(QNearFieldTarget *target)
 {
     if (target)
         target->deleteLater();
 }

 void AnnotatedUrl::handlePolledNdefMessage(QNdefMessage message)
 {
     QNearFieldTarget *target = qobject_cast<QNearFieldTarget *>(sender());
     handleMessage(message, target);
 }

 void AnnotatedUrl::handleMessage(const QNdefMessage &message, QNearFieldTarget *target)
 {
     Q_UNUSED(target);

     enum {
         MatchedNone,
         MatchedFirst,
         MatchedEnglish,
         MatchedLanguage,
         MatchedLanguageAndCountry
     } bestMatch = MatchedNone;

     QLocale defaultLocale;

     QString title;
     QUrl url;
     QPixmap pixmap;

     for (const QNdefRecord &record : message) {
         if (record.isRecordType<QNdefNfcTextRecord>()) {
             QNdefNfcTextRecord textRecord(record);

             title = textRecord.text();
             QLocale locale(textRecord.locale());
             // already found best match
             if (bestMatch == MatchedLanguageAndCountry) {
                 // do nothing
             } else if (bestMatch <= MatchedLanguage && locale == defaultLocale) {
                 bestMatch = MatchedLanguageAndCountry;
             } else if (bestMatch <= MatchedEnglish &&
                        locale.language() == defaultLocale.language()) {
                 bestMatch = MatchedLanguage;
             } else if (bestMatch <= MatchedFirst && locale.language() == QLocale::English) {
                 bestMatch = MatchedEnglish;
             } else if (bestMatch == MatchedNone) {
                 bestMatch = MatchedFirst;
             }
         } else if (record.isRecordType<QNdefNfcUriRecord>()) {
             QNdefNfcUriRecord uriRecord(record);

             url = uriRecord.uri();
         } else if (record.typeNameFormat() == QNdefRecord::Mime &&
                    record.type().startsWith("image/")) {
             pixmap = QPixmap::fromImage(QImage::fromData(record.payload()));
         }
     }

     emit annotatedUrl(url, title, pixmap);
 }