High light do not upate?

[Abel]

Hi All,
I whan to high light the current item of listview. But the highlight bar do not update when I click , it always say at top of list.
It seems that current item never updated when mouse clicked! If I update currentItemIndex manually, the hightlight bar can move. What's wrong with it?

Rectangle {
        width: 180; height: 200
        ListModel {
            id: contactModel
            ListElement {
                name: "Bill Smith"
                number: "555 3264"
            }
            ListElement {
                name: "John Brown"
                number: "555 8426"
            }
            ListElement {
                name: "Sam Wise"
                number: "555 0473"
            }
        }
        Component {
            id: contactDelegate
            Item {
                width: 180; height: 40
                Column {
                    Text { text: '<b>Name:</b> ' + name }
                    Text { text: '<b>Number:</b> ' + number }
                }
            }
        }
 
        ListView {
            anchors.fill: parent
            model: contactModel
            delegate: contactDelegate
            highlight: Rectangle { color: "lightsteelblue"; radius: 5 }
            focus: true
        }
    }

Rectangle {
        width: 180; height: 200
        ListModel {
            id: contactModel
            ListElement {
                name: "Bill Smith"
                number: "555 3264"
            }
            ListElement {
                name: "John Brown"
                number: "555 8426"
            }
            ListElement {
                name: "Sam Wise"
                number: "555 0473"
            }
        }
        Component {
            id: contactDelegate
            Item {
                width: 180; height: 40
                Column {
                    Text { text: '<b>Name:</b> ' + name }
                    Text { text: '<b>Number:</b> ' + number }
                }
            }
        }

        ListView {
            anchors.fill: parent
            model: contactModel
            delegate: contactDelegate
            highlight: Rectangle { color: "lightsteelblue"; radius: 5 }
            focus: true
        }
    }

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