How to get Absolute Coordinates of a Field.

Question

I know that the properties "x" and "y" of any field of PDF Form will give me the coordinates relative to the parent object.
How to get the absolute coordinates of any object (or any field) on a PDF Form?
My objective is to make a Subform Visible or Hidden and reposition it close to any other field in order to display some extra text to show more info about the required field.
How I can do that?
Tarek.

Answer 1

Hi,
I wrote a recursive function that will go up in the forms hierarchy and summarizes the x and y coordinates of the parent objects.
var vX = 0
var vY = 0;
function findCoordinates(vNode) {
    if (vNode !== null) {
        if (vNode.className === "field" || vNode.className === "subform") {
            console.println(vNode.name + " > " + vNode.x);
            var xUnit = vNode.x.match(/(mm|cm|pt|in)/g);
            var xValue = parseFloat(vNode.x.replace(xUnit, ""));
            if (xUnit === "mm") {
                vX += xValue / parseFloat("25.4");
            } else if (xUnit === "cm") {
                vX += xValue / parseFloat("2.54");
            } else if (xUnit === "pt") {
                vX += xValue / 72;
            } else {
                vX += xValue;
            var yUnit = vNode.y.match(/(mm|cm|pt|in)/g);
            var yValue = parseFloat(vNode.y.replace(yUnit, ""));
            if (yUnit === "mm") {
                vY += yValue / parseFloat("25.4");
            } else if (yUnit === "cm") {
                vY += yValue / parseFloat("2.54");
            } else if (yUnit === "pt") {
                vY += yValue / 72;
            } else {
                vY += yValue;
        findCoordinates(vNode.parent);
    var vCoordinates = (Math.round(vX * 2) / 2) + "mm " + (Math.round(vY * 2) / 2) + "mm";
    return vCoordinates;
Textfeld2.rawValue = findCoordinates(xfa.resolveNode("Teilformular1.Teilformular2.Textfeld1"));