Qt 5.11 | Qt NFC | NDEF Editor Example | mimeimagerecordeditor.cpp Example File

Qt 5.11.3 Reference Documentation

# mimeimagerecordeditor.cpp Example File

ndefeditor/mimeimagerecordeditor.cpp

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      #include "mimeimagerecordeditor.h"
      #include "ui_mimeimagerecordeditor.h"

      #include <QtGui/QImageReader>
      #include <QtWidgets/QFileDialog>
      #include <QtCore/QBuffer>

      static QString imageFormatToMimeType(const QByteArray &format)
      {
          if (format == "bmp")
              return QStringLiteral("image/bmp");
          else if (format == "gif")
              return QStringLiteral("image/gif");
          else if (format == "jpg" || format == "jpeg")
              return QStringLiteral("image/jpeg");
          else if (format == "mng")
              return QStringLiteral("video/x-mng");
          else if (format == "png")
              return QStringLiteral("image/png");
          else if (format == "pbm")
              return QStringLiteral("image/x-portable-bitmap");
          else if (format == "pgm")
              return QStringLiteral("image/x-portable-graymap");
          else if (format == "ppm")
              return QStringLiteral("image/x-portable-pixmap");
          else if (format == "tiff")
              return QStringLiteral("image/tiff");
          else if (format == "xbm")
              return QStringLiteral("image/x-xbitmap");
          else if (format == "xpm")
              return QStringLiteral("image/x-xpixmap");
          else if (format == "svg")
              return QStringLiteral("image/svg+xml");
          else
              return QString();
      }

      MimeImageRecordEditor::MimeImageRecordEditor(QWidget *parent) :
          QWidget(parent),
          ui(new Ui::MimeImageRecordEditor)
      {
          ui->setupUi(this);
      }

      MimeImageRecordEditor::~MimeImageRecordEditor()
      {
          delete ui;
      }

      void MimeImageRecordEditor::setRecord(const QNdefRecord &record)
      {
          m_record = record;

          QByteArray data = record.payload();
          QBuffer buffer(&data);
          buffer.open(QIODevice::ReadOnly);

          QImageReader reader(&buffer);

          ui->mimeImageType->setText(imageFormatToMimeType(reader.format()));

          ui->mimeImageImage->setPixmap(QPixmap::fromImage(reader.read()));
          ui->mimeImageFile->clear();
      }

      QNdefRecord MimeImageRecordEditor::record() const
      {
          return m_record;
      }

      void MimeImageRecordEditor::on_mimeImageOpen_clicked()
      {
          QString mimeDataFile = QFileDialog::getOpenFileName(this, tr("Select Image File"));
          if (mimeDataFile.isEmpty())
              return;

          QFile imageFile(mimeDataFile);
          if (!imageFile.open(QIODevice::ReadOnly)) {
              ui->mimeImageFile->clear();
              ui->mimeImageImage->clear();
          }

          QByteArray imageData = imageFile.readAll();

          QBuffer buffer(&imageData);
          buffer.open(QIODevice::ReadOnly);

          QImageReader reader(&buffer);
          QString mimeType = imageFormatToMimeType(reader.format());
          ui->mimeImageType->setText(mimeType);

          QImage image = reader.read();

          ui->mimeImageFile->setText(mimeDataFile);
          ui->mimeImageImage->setPixmap(QPixmap::fromImage(image));

          m_record.setTypeNameFormat(QNdefRecord::Mime);
          m_record.setType(mimeType.toLatin1());
          m_record.setPayload(imageData);
      }