Map MouseArea x, y to global

[Bob64]

I am obviously missing something basic here, but I am struggling to map mouse.x, mouse.y in a MouseArea to the global (main window) coordinates.

import QtQuick 2.9
import QtQuick.Window 2.2

Window {
    visible: true
    width: 640; height: 480
    Rectangle {
        width: 250; height: 30
        anchors.centerIn: parent
        border.color: "black"
        MouseArea {
            anchors.fill: parent
            acceptedButtons: Qt.LeftButton
            onClicked: {
                console.log("mouse x, y = ", mouse.x, mouse.y);
                var globXY = mapToGlobal(mouse.x, mouse.y);
                console.log("mouse -> global x, y = ", globXY.x, globXY.y);
            }
        }
    }
}

Output:

qml: mouse x, y =  95 11
qml: mouse -> global x, y =  930 516

What am I missing?

[Bob64]

@Bob64 D'oh! The clue was in my question. I was assuming global meant relative to main window - it means relative to screen. The solution is to offset by the main window x, y coordinates.