annotatedurl.cpp Example File

annotatedurl/annotatedurl.cpp
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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); }