shift-shell/look-and-feel/contents/lockscreen/LockKey.qml

import QtQuick 2.0
import org.kde.plasma.core 2.0 as PlasmaCore

PlasmaCore.SvgItem {
    id: square
    property int value: 0
    anchors.top: parent.top
    width: parent.width/4
    height: parent.height

    svg: symbolsSvg
}