Usings enums as the return type of a function, does not work in qml

Creaperdown

Hey, I am trying to return an enum from my C++ code, my enum is defined in a namespace, and looks like this:

// book_operation_status.hpp 

namespace application
{ 
Q_NAMESPACE

enum class BookOperationStatus
{
    Success,
    ...
};

Q_ENUM_NS(BookOperationStatus)

} // namespace application

I am trying to export it to qml, using (in main.cpp)

qmlRegisterUncreatableMetaObject(application::staticMetaObject,                                     
"Librum.enums", 1, 0, "BookOperationStatus",                                      
"This enum is uncreatable")

When trying to import and use it in qml, it works just fine, I can console.log() any enum value.
But when trying to return it from a c++ function, called from QML, I get the error:

qml:134: Error: Unknown method return type: application::BookOperationStatus

Does anyone have an idea why this happens?
Thanks in advance.

Also: my QML code, my enum and the c++ function which returns the enum, are all in different binaries (shared libraries). Maybe this is important here.

sierdzio

You probably need to also register "application::BookOperationStatus" as meta object.

Also, remember that QML does not quite understand enums, if you want to store it in QML you need to use int.

Creaperdown

@sierdzio How exactly would I register the enum as a meta object?

sierdzio

I meant Q_DECLARE_METATYPE(application::BookOperationStatus) but it probably does not apply in this case.