how to use highlight element

[saiteja yerramilli]

I am making a telephome gui application using qml, I want to know how to use highlight element to highlight the elements of the dynamic list. The new element in the list must get highlighted. below is my source code.
ListView{
id:myview
// model:callmodel
model:callmodel
width: mainrect.width
anchors.bottom: buttonsrow.top
anchors.bottomMargin: 0
anchors.top: currentcalldisplay.bottom
anchors.topMargin: 0
delegate: mydelegate
focus:true
}
delegate:
Component{
id:mydelegate

Rectangle{
    id:delrec
    property string localcallstate:callstate
    property string localcallnumber:callnumber
    width:mainrect.width
    height: mainrect.height/10
    function getcolor(localcallstate)
    {
        if(localcallstate == "Active")
            return "#22d73a"
        else if(localcallstate == "Hold")
            return "#aa7865"
        else if(localcallstate == "Incoming")
            return "#f910da"
    }

    color: getcolor(localcallstate)
    Text {
        id: callstatetexr
        anchors.right:parent.right
        anchors.rightMargin: parent.width/6
        anchors.verticalCenter:delrec.verticalCenter
        text: localcallstate
        font.pointSize: 25
    }
    Text {
        id: callnumbertext
        anchors.left: parent.left
        anchors.leftMargin: parent.width/5
        anchors.topMargin: parent.height/5
        anchors.verticalCenter:delrec.verticalCenter
        text: localcallnumber
        font.pointSize: 25
    }
   focus:true
   MouseArea {
       anchors.fill: parent
       onClicked: myview.currentIndex = index
   }
}

}

i want to know the implementation of the highlight element so that the newly entered element in the list will get highlighted.

[sierdzio]

Please wrap your code in code tags to make it easier to read.