无法引用listview qml的突出显示id

import QtQuick 2.0
import QtQuick.Controls 2.0

ListView {
    id: listView
    width: 200
    height: 300

    model: ListModel {
        ListElement { name: "Item 1" }
        ListElement { name: "Item 2" }
        ListElement { name: "Item 3" }
    }

    delegate: Item {
        width: listView.width
        height: 40

        Rectangle {
            width: parent.width
            height: parent.height
            color: listView.currentIndex === index ? "lightblue" : "white"
            border.color: "black"
            border.width: 1

            Text {
                anchors.centerIn: parent
                text: model.name
            }
        }

        MouseArea {
            anchors.fill: parent
            onClicked: {
                listView.currentIndex = index
            }
        }
    }
}