QML + QEnums

[bunjee]

Greetings Qt community,

I'm calling this function from QML:
@Q_INVOKABLE OtherClass::Type Class::getType() const;@
In the QML:
@property int type: -1

type = class.getType();@
I get the following message:
@'Cannot assign [undefined] to int'@

The enum is declared with Q_ENUM in the OtherClass. And I declared OtherClass with qmlRegisterType.

Am I missing something ?

Thanks.

[dmcr]

Hello,

I don't think it's possible to do that (your syntax seems ok)
I have tried it a time ago, but i finally cast the value int for using it in QML side.

[SteveKing]

Hi,

I ended up doing the same as dmcr... It seems that Q_ENUMS work correctly in QML for comparisons, assignment and as function arguments but don't work when passed from C++ as either function return values or signal arguments.

[chriadam]

Hi SteveKing,

That sounds like a bug. Can you confirm that it's still the case in QtQuick2? If so, please file a bug report.

Cheers,
Chris.

/edit: I should add - there is some special considerations with enums (and the QMetaObject extension stuff) which I'm not too familiar, so perhaps the fact that the source of the type information is a separate QMetaObject, is the issue in this particular case. I don't know. Either way, it should work - whether or not it's technically feasible to fix is another question...

[SteveKing]

Hi Chris,

I'm not using Qt5 (QtQuick2) yet so I don't know if it's there. I think this might be related to existing bugs: "15983":https://bugreports.qt-project.org/browse/QTBUG-15983 and "27041":https://bugreports.qt-project.org/browse/QTBUG-27041

Regards,
Steve