mainwindow.cpp Example File

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#include "mainwindow.h" #include "ui_mainwindow.h" #include "textrecordeditor.h" #include "urirecordeditor.h" #include "mimeimagerecordeditor.h" #include <QtNfc/qndefnfcurirecord.h> #include <QtNfc/qndefnfctextrecord.h> #include <QtNfc/qndefrecord.h> #include <QtNfc/qndefmessage.h> #include <QtNfc/qnearfieldmanager.h> #include <QtNfc/qnearfieldtarget.h> #include <QtWidgets/QMenu> #include <QtWidgets/QVBoxLayout> #include <QtWidgets/QFrame> #include <QtWidgets/QLabel> #include <QtWidgets/QFileDialog> class EmptyRecordLabel : public QLabel { Q_OBJECT public: EmptyRecordLabel() : QLabel(tr("Empty Record")) { } ~EmptyRecordLabel() { } void setRecord(const QNdefRecord &record) { Q_UNUSED(record); } QNdefRecord record() const { return QNdefRecord(); } }; class UnknownRecordLabel : public QLabel { Q_OBJECT public: UnknownRecordLabel() : QLabel(tr("Unknown Record Type")) { } ~UnknownRecordLabel() { } void setRecord(const QNdefRecord &record) { m_record = record; } QNdefRecord record() const { return m_record; } private: QNdefRecord m_record; }; template <typename T> void addRecord(Ui::MainWindow *ui, const QNdefRecord &record = QNdefRecord()) { QVBoxLayout *vbox = qobject_cast<QVBoxLayout *>(ui->scrollAreaWidgetContents->layout()); if (!vbox) return; if (!vbox->isEmpty()) { QFrame *hline = new QFrame; hline->setFrameShape(QFrame::HLine); hline->setObjectName(QStringLiteral("line-spacer")); vbox->addWidget(hline); } T *recordEditor = new T; recordEditor->setObjectName(QStringLiteral("record-editor")); if (!record.isEmpty()) recordEditor->setRecord(record); vbox->addWidget(recordEditor); } MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow), m_touchAction(NoAction) { ui->setupUi(this); QMenu *addRecordMenu = new QMenu(this); addRecordMenu->addAction(tr("NFC Text Record"), this, SLOT(addNfcTextRecord())); addRecordMenu->addAction(tr("NFC URI Record"), this, SLOT(addNfcUriRecord())); addRecordMenu->addAction(tr("MIME Image Record"), this, SLOT(addMimeImageRecord())); addRecordMenu->addAction(tr("Empty Record"), this, SLOT(addEmptyRecord())); ui->addRecord->setMenu(addRecordMenu); QVBoxLayout *vbox = new QVBoxLayout; ui->scrollAreaWidgetContents->setLayout(vbox); m_manager = new QNearFieldManager(this); connect(m_manager, SIGNAL(targetDetected(QNearFieldTarget*)), this, SLOT(targetDetected(QNearFieldTarget*))); connect(m_manager, SIGNAL(targetLost(QNearFieldTarget*)), this, SLOT(targetLost(QNearFieldTarget*))); } MainWindow::~MainWindow() { delete ui; } void MainWindow::addNfcTextRecord() { addRecord<TextRecordEditor>(ui); } void MainWindow::addNfcUriRecord() { addRecord<UriRecordEditor>(ui); } void MainWindow::addMimeImageRecord() { addRecord<MimeImageRecordEditor>(ui); } void MainWindow::addEmptyRecord() { addRecord<EmptyRecordLabel>(ui); } void MainWindow::loadMessage() { QString filename = QFileDialog::getOpenFileName(this, tr("Select NDEF Message")); if (filename.isEmpty()) return; QFile file(filename); if (! return; QByteArray ndef = file.readAll(); ndefMessageRead(QNdefMessage::fromByteArray(ndef)); file.close(); } void MainWindow::saveMessage() { QString filename = QFileDialog::getSaveFileName(this, tr("Select NDEF Message")); if (filename.isEmpty()) return; QFile file(filename); if (! return; file.write(ndefMessage().toByteArray()); file.close(); } void MainWindow::touchReceive() { ui->status->setStyleSheet(QStringLiteral("background: blue")); m_touchAction = ReadNdef; m_manager->setTargetAccessModes(QNearFieldManager::NdefReadTargetAccess); m_manager->startTargetDetection(); } void MainWindow::touchStore() { ui->status->setStyleSheet(QStringLiteral("background: yellow")); m_touchAction = WriteNdef; m_manager->setTargetAccessModes(QNearFieldManager::NdefWriteTargetAccess); m_manager->startTargetDetection(); } void MainWindow::targetDetected(QNearFieldTarget *target) { switch (m_touchAction) { case NoAction: break; case ReadNdef: connect(target, &QNearFieldTarget::ndefMessageRead, this, &MainWindow::ndefMessageRead); connect(target, &QNearFieldTarget::error, this, &MainWindow::targetError); m_request = target->readNdefMessages(); if (!m_request.isValid()) // cannot read messages targetError(QNearFieldTarget::NdefReadError, m_request); break; case WriteNdef: connect(target, &QNearFieldTarget::ndefMessagesWritten, this, &MainWindow::ndefMessageWritten); connect(target, &QNearFieldTarget::error, this, &MainWindow::targetError); m_request = target->writeNdefMessages(QList<QNdefMessage>() << ndefMessage()); if (!m_request.isValid()) // cannot write messages targetError(QNearFieldTarget::NdefWriteError, m_request); break; } } void MainWindow::targetLost(QNearFieldTarget *target) { target->deleteLater(); } void MainWindow::ndefMessageRead(const QNdefMessage &message) { clearMessage(); foreach (const QNdefRecord &record, message) { if (record.isRecordType<QNdefNfcTextRecord>()) { addRecord<TextRecordEditor>(ui, record); } else if (record.isRecordType<QNdefNfcUriRecord>()) { addRecord<UriRecordEditor>(ui, record); } else if (record.typeNameFormat() == QNdefRecord::Mime && record.type().startsWith("image/")) { addRecord<MimeImageRecordEditor>(ui, record); } else if (record.isEmpty()) { addRecord<EmptyRecordLabel>(ui); } else { addRecord<UnknownRecordLabel>(ui, record); } } ui->status->setStyleSheet(QString()); m_manager->setTargetAccessModes(QNearFieldManager::NoTargetAccess); m_manager->stopTargetDetection(); m_request = QNearFieldTarget::RequestId(); ui->statusBar->clearMessage(); } void MainWindow::ndefMessageWritten() { ui->status->setStyleSheet(QString()); m_manager->setTargetAccessModes(QNearFieldManager::NoTargetAccess); m_manager->stopTargetDetection(); m_request = QNearFieldTarget::RequestId(); ui->statusBar->clearMessage(); } void MainWindow::targetError(QNearFieldTarget::Error error, const QNearFieldTarget::RequestId &id) { Q_UNUSED(error); Q_UNUSED(id); if (m_request == id) { switch (error) { case QNearFieldTarget::NoError: ui->statusBar->clearMessage(); break; case QNearFieldTarget::UnsupportedError: ui->statusBar->showMessage(tr("Unsupported tag")); break; case QNearFieldTarget::TargetOutOfRangeError: ui->statusBar->showMessage(tr("Tag removed from field")); break; case QNearFieldTarget::NoResponseError: ui->statusBar->showMessage(tr("No response from tag")); break; case QNearFieldTarget::ChecksumMismatchError: ui->statusBar->showMessage(tr("Checksum mismatch")); break; case QNearFieldTarget::InvalidParametersError: ui->statusBar->showMessage(tr("Invalid parameters")); break; case QNearFieldTarget::NdefReadError: ui->statusBar->showMessage(tr("NDEF read error")); break; case QNearFieldTarget::NdefWriteError: ui->statusBar->showMessage(tr("NDEF write error")); break; default: ui->statusBar->showMessage(tr("Unknown error")); } ui->status->setStyleSheet(QString()); m_manager->setTargetAccessModes(QNearFieldManager::NoTargetAccess); m_manager->stopTargetDetection(); m_request = QNearFieldTarget::RequestId(); } } void MainWindow::clearMessage() { QWidget *scrollArea = ui->scrollAreaWidgetContents; qDeleteAll(scrollArea->findChildren<QWidget *>(QStringLiteral("line-spacer"))); qDeleteAll(scrollArea->findChildren<QWidget *>(QStringLiteral("record-editor"))); } QNdefMessage MainWindow::ndefMessage() const { QVBoxLayout *vbox = qobject_cast<QVBoxLayout *>(ui->scrollAreaWidgetContents->layout()); if (!vbox) return QNdefMessage(); QNdefMessage message; for (int i = 0; i < vbox->count(); ++i) { QWidget *widget = vbox->itemAt(i)->widget(); if (TextRecordEditor *editor = qobject_cast<TextRecordEditor *>(widget)) { message.append(editor->record()); } else if (UriRecordEditor *editor = qobject_cast<UriRecordEditor *>(widget)) { message.append(editor->record()); } else if (MimeImageRecordEditor *editor = qobject_cast<MimeImageRecordEditor *>(widget)) { message.append(editor->record()); } else if (qobject_cast<EmptyRecordLabel *>(widget)) { message.append(QNdefRecord()); } else if (UnknownRecordLabel *label = qobject_cast<UnknownRecordLabel *>(widget)) { message.append(label->record()); } } return message; } #include "mainwindow.moc"

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