Korchkidu Korchkidu - 10 months ago 100
C++ Question

Q_INVOKABLE method returning custom C++ type

I have a C++ method made Q_INVOKABLE. I can call this method from QML and it works when it returns basic types (like QString). But I can't with a custom type. How should I do this? Should I return a QVariant instead? Ideally, I would like to return a pointer to my custom type if possible.

I do:

qmlRegisterType<MyType>("Mine", 1, 0, "MyType");
qmlEngine->rootContext()->setContextProperty("testObj", new MyType());

I can use testObj global object or create MyType QML component. But I cannot use it in some javascript code as a return type from a Q_INVOKABLE C++ method.


Yes, QVariant is the way to go for your custom class in that construction. Make sure you register your class.

That being said, you may wish to consider using Q_PROPERTY instead, for your custom type and then you can access that even without a function call. If you need custom parameters to the method and you cannot rearrange the code, this is obviously not an option.