C++11 strongly typed enums in the signal/slot/ metaobject system?
Is there any documentation on using the new c++11 strongly typed enums (enum class ) as types in the Qt metaojbect system?
It is pretty clear how enums work in normal c++, with the Q_ENUMS and all that, but now that enums are levelled up, what happens? I want to declare an enum like:
enum class SystemState : quint8
NULL_STATE = 0,
INITIALIZE_STATE = 1,
OP_IDLE_STATE = 2,
// .... etc
And then use it in a class' signal:
void stateChanged(SystemState newState);
Is there some documentation I missed in my googling?
Bump - anyone?
Hi, Any type that may be used in the signal/slot mechanism should fit in a QVariant sized variable. To use other argument types the user should use the Q_DECLARE_METATYPE(type) to do so. I don't believe that the C++11 changes anything to that. So below the definition of your class add the
and you should be able to use the class in signal/slot use.