change property of delegate by function

[kelly]

Hi I wan to change property of delegate in setWidth().
How to access width of gridViewWidth?

function setWidth () {

}

GridView {
    y : 160
    width: 1300
    height : 500
    clip: true
    snapMode: ListView.SnapToItem
    focus: true
    interactive: true

    model : test

    cellWidth: 692; cellHeight: 295

    ListModel {
        id : test
    }

    delegate:
        Item {
            id: gridViewWidth
            width : 650
            height : 250
            
            Text {
                x : 20
                width : 500
                height: 71
                color: "black"
                font.pixelSize: 32
                verticalAlignment: Text.AlignVCenter
                horizontalAlignment: Text.AlignHCenter
                text : "test2"
                elide: Text.ElideRight
                }
             }
}    

Thanks in advance for your answer.