Missing type "QScreen" is referenced in qmltypes

        Signal {
            name: "screenChanged"
            Parameter { type: "QScreen"; isPointer: true }
        }
        Property {
            name: "screen"
            type: "QScreen"
            isPointer: true
            read: "screen"
            write: "setScreen"
            notify: "screenChanged"
            index: 1
        }