import QtQuick 2
import QtQuick.Window 2

Window {
    width: 640
    height: 480
    visible: true

    MouseArea {
        anchors.fill: parent
        hoverEnabled: true

        Rectangle {
            anchors.fill: parent
            color: parent.containsMouse ? 'grey' : 'white'

            MouseArea {
                anchors.fill: parent
                anchors.margins: parent.width / 6

                hoverEnabled: true

                Rectangle {
                    anchors.fill: parent
                    color: parent.containsMouse ? 'grey' : 'white'
                    border.width: 1
                    border.color: 'black'
                }
            }
        }
    }
}