Qml Interface Property

[duncanc4]

There seems to be a current limitation of not being able to define an interface property in Qml, like you can in C++. Is this a bug, or by design?

With the below Qml code, you will get an error of "MyInterface is not a type" when trying to declare a property that is an interface.

In C++
@
class MyInterface
{
// Class definition
}

class MyObject: public QObject
{
Q_OBJECT
Q_PROPERTY( MyInterface* interface READ getInstance() WRITE setInterface() )
}

// In main, register interface
qmlRegisterInterface<MyInterface>( "MyInterface" );
@

In Qml

@
// This is valid
MyObject {
interface: SomeInterfaceInstance {}
}

// This isn't valid
Item {
property MyInterface: SomeInterfaceInstance {}
}
@

[v.v.gl]

2024year... problem is still the same

[GrecKo]

You have to use the Q_DECLARE_INTERFACE and Q_INTERFACES macros