QML text item does not respect new width set in onLineLaidOut

import QtQuick 2.2
import QtQuick.Window 2.1

Window {
    id: root
    visible: true

    property bool customLayout: false
    onCustomLayoutChanged: console.log("custom layout:", customLayout)
    property int textWidth: 111
    onTextWidthChanged: console.log("text width:", textWidth)

    Text {
        focus: true
        text: "one two three four five"
        width: customLayout ? parent.width : textWidth
        maximumLineCount: 1
        elide: Text.ElideRight
        onLineLaidOut:
            if (customLayout) {
                line.width = textWidth
            }

        Rectangle {
            width: textWidth
            height: parent.height
            z: parent.z - 1
            color: "salmon"
        }

        Component.onCompleted: root.textWidthChanged.connect(doLayout)

        Keys.onReturnPressed: customLayout = !customLayout
        Keys.onRightPressed: ++textWidth
        Keys.onLeftPressed: --textWidth
    }
}