Set ListElement role from c++

[zedroid]

Hello!
Is it possible to set in the ListElement role from the c++ context property?
In the way like below I have TypeError:
qml part:

ListModel {
        id: pictureModel
        ListElement {
              title: "name"
              src: "someqml.qml"
              something: devicemodel.value
        }

main.cpp

DeviceData devicemodel;
engine.rootContext()->setContextProperty(QStringLiteral("devicemodel"), &devicemodel);

c++ Val class:

class Val: public QObject{
    Q_OBJECT
    Q_PROPERTY(unsigned int curValue READ curValue WRITE writeCurValue  NOTIFY curValueChanged)
    Q_PROPERTY(unsigned int maxValue READ maxValue)
    Q_PROPERTY(unsigned int minValue READ minValue)
}

Devicedata class

class DeviceData : public QObject {
    Q_OBJECT
    Q_PROPERTY(Val* value READ value NOTIFY valueChanged)
}

[IntruderExcluder]

Values for roles at ListElement must be a simple constants: strings, numbers and boolean values. In your example value property is pointer.