InputDeviceManager {
        id: deviceManager
        filter: InputInfo.Mouse | InputInfo.Keyboard
        onReady: {
            console.log("number of devices: " + deviceManager.count)
        }
        onDeviceAdded: {
            // does not seem to work
            if (inputDevice.properties.type & InputInfo.Mouse) {
                console.log("mouse added")
            }
            if (inputDevice.properties.type & InputInfo.Keyboard) {
                console.log("keyboard added")
            }
            console.log(inputDevice.properties.name)
        }
        onDeviceRemoved: {
            console.log("device removed "+deviceId)
        }
    }