Method open

app/src/IO/Drivers/HID.cpp:160–201

* @brief Opens the selected HID device and starts the read thread. */

 * @brief Opens the selected HID device and starts the read thread.
 */
bool IO::Drivers::HID::open(const QIODevice::OpenMode mode)
{
  (void)mode;

  if (!configurationOk())
    return false;

  const QString path = m_devicePaths.at(m_deviceIndex);

  m_handle = hid_open_path(path.toUtf8().constData());
  if (!m_handle) {
    const wchar_t* err = hid_error(nullptr);
    const QString detail =
      (err && err[0] != L'\0') ? QString::fromWCharArray(err) : tr("Unknown error");
    QString info = detail;
#ifdef Q_OS_LINUX
    info += tr("\n\nCheck that your user is in the 'plugdev' group "
               "or that a udev rule grants access to this device.");
#endif
    Misc::Utilities::showMessageBox(
      tr("Failed to open \"%1\"").arg(m_deviceLabels.value(m_deviceIndex)),
      info,
      QMessageBox::Warning);
    return false;
  }

  hid_set_nonblocking(m_handle, 0);

  const uint16_t up = m_deviceUsagePages.value(m_deviceIndex, 0);
  const uint16_t u  = m_deviceUsages.value(m_deviceIndex, 0);
  m_usagePage       = up
                      ? QStringLiteral("0x") + QString::number(up, 16).rightJustified(4, QLatin1Char('0'))
                      : QString();
  m_usage = u ? QStringLiteral("0x") + QString::number(u, 16).rightJustified(4, QLatin1Char('0'))
              : QString();
  Q_EMIT deviceInfoChanged();

  m_running = true;
  m_readThread.start();

  return true;
}

//--------------------------------------------------------------------------------------------------
// Property accessors