Method openFile

app/src/IO/FileTransmission.cpp:262–301

* @brief Opens a file selection dialog. */

 * @brief Opens a file selection dialog.
 */
void IO::FileTransmission::openFile()
{
  auto* dialog =
    new QFileDialog(qApp->activeWindow(), tr("Select file to transmit"), QDir::homePath());
  dialog->setFileMode(QFileDialog::ExistingFile);
  dialog->setAttribute(Qt::WA_DeleteOnClose);

  connect(dialog, &QFileDialog::fileSelected, this, [this](const QString& path) {
    if (path.isEmpty())
      return;

    QMetaObject::invokeMethod(
      this,
      [this, path]() {
        if (fileOpen())
          closeFile();

        m_filePath = path;
        m_file.setFileName(path);
        if (m_file.open(QFile::ReadOnly)) {
          m_bytesTotal = m_file.size();
          m_bytesSent  = 0;

          if (m_transferMode == PlainText)
            m_stream = new QTextStream(&m_file);

          Q_EMIT fileChanged();
          Q_EMIT progressChanged();
          appendLog(
            tr("File selected: %1 (%2 bytes)").arg(QFileInfo(path).fileName()).arg(m_bytesTotal));
        } else {
          qWarning() << "File open error:" << m_file.errorString();
          appendLog(tr("Error opening file: %1").arg(m_file.errorString()));
        }
      },
      Qt::QueuedConnection);
  });

  dialog->open();
}

/**
 * @brief Closes the currently selected file and resets state.