The QDBusVariant class enables the programmer to identify the variant type provided by the D-Bus typesystem. 更多...
The QDBusVariant class enables the programmer to identify the variant type provided by the D-Bus typesystem.
A D-Bus function that takes an integer, a D-Bus variant and a string as parameters can be called with the following argument list (见 QDBusMessage.setArguments ()):
QList<QVariant> arguments;
arguments << QVariant(42) << QVariant.fromValue(QDBusVariant(43)) << QVariant("hello");
myDBusMessage.setArguments(arguments);
When a D-Bus function returns a D-Bus variant, it can be retrieved as follows:
// call a D-Bus function that returns a D-Bus variant
QVariant v = callMyDBusFunction();
// retrieve the D-Bus variant
QDBusVariant dbusVariant = qvariant_cast<QDBusVariant>(v);
// retrieve the actual value stored in the D-Bus variant
QVariant result = dbusVariant.variant();
QVariant within a QDBusVariant is required to distinguish between a normal D-Bus value and a value within a D-Bus variant.
构造新的 D-Bus 变体。
构造新的 D-Bus 变体从给定 Qt variant .
另请参阅 setVariant ().
Assigns the value of the given Qt variant to this D-Bus variant.
另请参阅 variant ().
将此 D-Bus 变体返回作为 QVariant 对象。
另请参阅 setVariant ().