C++ QDBusInterface::property方法代码示例

	void DBusConnector::requeryDevice (const QString& id)
	{
		QDBusInterface face ("org.freedesktop.UPower",
				id,
				"org.freedesktop.UPower.Device",
				SB_);
		if (face.property ("Type").toInt () != 2)
			return;

		BatteryInfo info;
		info.ID_ = id;
		info.Percentage_ = face.property ("Percentage").toInt ();
		info.TimeToFull_ = face.property ("TimeToFull").toLongLong ();
		info.TimeToEmpty_ = face.property ("TimeToEmpty").toLongLong ();
		info.Voltage_ = face.property ("Voltage").toDouble ();
		info.Energy_ = face.property ("Energy").toDouble ();
		info.EnergyFull_ = face.property ("EnergyFull").toDouble ();
		info.DesignEnergyFull_ = face.property ("EnergyFullDesign").toDouble ();
		info.EnergyRate_ = face.property ("EnergyRate").toDouble ();
		info.Technology_ = TechIdToString (face.property ("Technology").toInt ());
		info.Temperature_ = 0;

		emit batteryInfoUpdated (info);
	}

int main(int argc, char *argv[])
{
    // TODO: Clean this up, update API, etc.
    if (argc < 5 || argc > 6)
    {
        qWarning() << "Error detected! Insufficient number of arguments.";
        qWarning() << "";
        qWarning() << "Usage: ambdbusaccess <R/W> <Object> <Property> <Zone> [Value]";
        qWarning() << "- <R/W>";
        qWarning() << "  Used for specifying [R]ead or [W]rite.";
        qWarning() << "- <Object>";
        qWarning() << "  The AMB object to access.";
        qWarning() << "- <Property>";
        qWarning() << "  The property within the object to access.";
        qWarning() << "- <Zone>";
        qWarning() << "  The AMB zone to access.";
        qWarning() << "- [Value]";
        qWarning() << "  The value to write, if writing.";
        qWarning() << "Example: ambdbusaccess Write ClimateControl FanSpeedLevel 0 7";
        qWarning() << "";
        qWarning() << "This program returns an int under the following conditions:";
        qWarning() << "Successful Read: <Value Read>";
        qWarning() << "Unsuccessful Read: -1";
        qWarning() << "Successful Write: <Value Written>";
        qWarning() << "Unsuccessful Write: -1";

        return -1;
    }

    // TODO: Error check input.
    bool read = !strncmp(argv[1], "R", 1);
    QString object = argv[2];
    QString property = argv[3];
    qint32 zone = atoi(argv[4]);
    qint32 value = 0;

    if (argc == 6)
    {
        value = atoi(argv[5]);
    }

    // Necessary to suppress Qt messages about touching the D-Bus before the application was created.
    QCoreApplication a(argc, argv);

    // Sanity check that the system bus is actually present.
    if (!QDBusConnection::systemBus().isConnected())
    {
        qCritical() << "Could not access system D-Bus!";
        return -1;
    }

    // Get ahold of the manager object.
    QDBusInterface *manager = new QDBusInterface("org.automotive.message.broker", "/", "org.automotive.Manager",
                                                 QDBusConnection::systemBus());

    // Go fetch the path for the AMB object we are concerned with.
    qDebug().nospace() << "Looking for property " << property.toStdString().c_str() << " of object " <<
                          object.toStdString().c_str() << " in zone " << zone << ".";
    QDBusReply<QDBusObjectPath> propertyPath = manager->call("FindObjectForZone", object.toStdString().c_str(), zone);
    if (!propertyPath.isValid())
    {
        qDebug() << "Invalid reply!" << propertyPath.error() << "Got the path:" << propertyPath.value().path();
    }

    // Now that we have the path, open an interface to the object.
    QDBusInterface *propertyInterface = new QDBusInterface("org.automotive.message.broker", propertyPath.value().path(),
                                                           "org.automotive.ClimateControl", QDBusConnection::systemBus());

    // Perform our read or write operation.
    if (read)
    {
        QVariant reply = propertyInterface->property(property.toStdString().c_str());
        if (!reply.isValid())
        {
            qDebug() << "Invalid reply when reading the property!" << propertyInterface->lastError() << "Property:" <<
                        reply.toString();
            value = -1;
        }
        else
        {
            qDebug().nospace() << "Got a valid reply for the property of " << reply.toString().toStdString().c_str() << ".";
            value = reply.toInt();
        }
    }
    else
    {
        QVariant reply = propertyInterface->setProperty(property.toStdString().c_str(), value);
        if (reply.toBool())
        {
            qDebug() << "Successfully wrote the property.";
        }
        else
        {
            qDebug() << "Failed to write the property.";
            value = -1;
        }
    }

    // Clean up.
    delete propertyInterface;
//.........这里部分代码省略.........

QVariant UnitModel::data(const QModelIndex & index, int role) const
{

  if (!index.isValid())
    return QVariant();

  if (role == Qt::DisplayRole)
  {
    if (index.column() == 0)
      return unitList->at(index.row()).load_state;
    else if (index.column() == 1)
      return unitList->at(index.row()).active_state;
    else if (index.column() == 2)
      return unitList->at(index.row()).sub_state;
    else if (index.column() == 3)
      return unitList->at(index.row()).id;
  }

  else if (role == Qt::ForegroundRole)
  {
    const KColorScheme scheme(QPalette::Normal);
    if (unitList->at(index.row()).active_state == "active")
      return scheme.foreground(KColorScheme::PositiveText);
    else if (unitList->at(index.row()).active_state == "failed")
      return scheme.foreground(KColorScheme::NegativeText);
    else if (unitList->at(index.row()).active_state == "-")
      return scheme.foreground(KColorScheme::InactiveText);
    else
      return QVariant();
  }

  else if (role == Qt::ToolTipRole)
  {
    QString selUnit = unitList->at(index.row()).id;
    QString selUnitPath = unitList->at(index.row()).unit_path.path();
    QString selUnitFile = unitList->at(index.row()).unit_file;

    QString toolTipText;
    toolTipText.append("<FONT COLOR=white>");
    toolTipText.append("<b>" + selUnit + "</b><hr>");

    // Create a DBus interface
    QDBusConnection bus("");
    if (!userBus.isEmpty())
      bus = QDBusConnection::connectToBus(userBus, "org.freedesktop.systemd1");
    else
      bus = QDBusConnection::systemBus();
    QDBusInterface *iface;

    // Use the DBus interface to get unit properties
    if (!selUnitPath.isEmpty())
    {
      // Unit has a valid path

      iface = new QDBusInterface ("org.freedesktop.systemd1",
                                  selUnitPath,
                                  "org.freedesktop.systemd1.Unit",
                                  bus);
      if (iface->isValid())
      {
        // Unit has a valid unit DBus object
        toolTipText.append(i18n("<b>Description: </b>"));
        toolTipText.append(iface->property("Description").toString());
        toolTipText.append(i18n("<br><b>Unit file: </b>"));
        toolTipText.append(iface->property("FragmentPath").toString());
        toolTipText.append(i18n("<br><b>Unit file state: </b>"));
        toolTipText.append(iface->property("UnitFileState").toString());

        qulonglong ActiveEnterTimestamp = iface->property("ActiveEnterTimestamp").toULongLong();
        toolTipText.append(i18n("<br><b>Activated: </b>"));
        if (ActiveEnterTimestamp == 0)
          toolTipText.append("n/a");
        else
        {
          QDateTime timeActivated;
          timeActivated.setMSecsSinceEpoch(ActiveEnterTimestamp/1000);
          toolTipText.append(timeActivated.toString());
        }

        qulonglong InactiveEnterTimestamp = iface->property("InactiveEnterTimestamp").toULongLong();
        toolTipText.append(i18n("<br><b>Deactivated: </b>"));
        if (InactiveEnterTimestamp == 0)
          toolTipText.append("n/a");
        else
        {
          QDateTime timeDeactivated;
          timeDeactivated.setMSecsSinceEpoch(InactiveEnterTimestamp/1000);
          toolTipText.append(timeDeactivated.toString());
        }
      }
      delete iface;

    }
    else
    {
      // Unit does not have a valid unit DBus object
      // Retrieve UnitFileState from Manager object

      iface = new QDBusInterface ("org.freedesktop.systemd1",
                                  "/org/freedesktop/systemd1",
//.........这里部分代码省略.........