Script : How to add a progress bar to XMP Writing script ?

Question

Hi !
I have this script that works flawlessly but when i execute it on big video files ( > 1GB) bridge doesn't repaint and it looks like it's stuck. I would like to have a progress bar showing % remaining on the task and the name of the file being treated. Can someone point me into the right direction as my adobe scripting knowledge is not that great.
#target bridge  
if( BridgeTalk.appName == "bridge" ) { 
descToTitle = MenuElement.create("command", "Log Comment to Description", "at the end of Tools");
descToTitle.onSelect = function () {
           if (ExternalObject.AdobeXMPScript == undefined) ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
           var thumb = app.document.selections;
           for(var s in thumb){
                     if(thumb[s].hasMetadata){
                                        var selectedFile = thumb[s].spec;
                                        var myXmpFile = new XMPFile( selectedFile.fsName, XMPConst.UNKNOWN, XMPConst.OPEN_FOR_UPDATE);
                                        var myXmp = myXmpFile.getXMP();
                                        var LogComment = myXmp.getProperty(XMPConst.NS_DM, "logComment");
                                        myXmp.deleteProperty(XMPConst.NS_DC, "description");
                                        myXmp.appendArrayItem(XMPConst.NS_DC, "description", LogComment, 0, XMPConst.ALIAS_TO_ALT_TEXT);
                                        myXmp.setQualifier(XMPConst.NS_DC, "description[1]", "http://www.w3.org/XML/1998/namespace", "lang", "x-default");
                                        if (myXmpFile.canPutXMP(myXmp)) {
                                        myXmpFile.putXMP(myXmp);
                                        myXmpFile.closeFile(XMPConst.CLOSE_UPDATE_SAFELY);
                                         } else {
                      xmpFile.closeFile();
Thx in advance for helping me !

Answer 1

I am using this progress bar on bridge. I don't remember who gave it to me time ago.
Anyway I have adapt it to your script:
#target bridge  
if( BridgeTalk.appName == "bridge" ) { 
descToTitle = MenuElement.create("command", "Log Comment to Description", "at the end of Tools");
descToTitle.onSelect = function () {
    if (ExternalObject.AdobeXMPScript == undefined) ExternalObject.AdobeXMPScript = new ExternalObject("lib:AdobeXMPScript");
    var thumb = app.document.selections;
    var progBar = new createProgressWindow("Work in Progress", "Please wait", false);
    for (var s in thumb) {
        if(thumb[s].hasMetadata) {
            var selectedFile = thumb[s].spec;
            var myXmpFile = new XMPFile( selectedFile.fsName, XMPConst.UNKNOWN, XMPConst.OPEN_FOR_UPDATE);
            var myXmp = myXmpFile.getXMP();
            var LogComment = myXmp.getProperty(XMPConst.NS_DM, "logComment");
            myXmp.deleteProperty(XMPConst.NS_DC, "description");
            myXmp.appendArrayItem(XMPConst.NS_DC, "description", LogComment, 0, XMPConst.ALIAS_TO_ALT_TEXT);
            myXmp.setQualifier(XMPConst.NS_DC, "description[1]", "http://www.w3.org/XML/1998/namespace", "lang", "x-default");
        progBar.updateProgress (Math.floor((Number(s)+1)*(100/thumb.length)), "Waiting, " + Math.floor((Number(s)+1)*(100/thumb.length)) + "% completed.");
        if (myXmpFile.canPutXMP(myXmp)) {
            myXmpFile.putXMP(myXmp);
            myXmpFile.closeFile(XMPConst.CLOSE_UPDATE_SAFELY);
        } else {
            xmpFile.closeFile();
function createProgressWindow(title, message, hasCancelButton) {
    var win;
    if (title == null) title = "Work in progress";
    if (message == null) message = "Please wait...";
    if (hasCancelButton == null) hasCancelButton = false;
    win = new Window("palette", "" + title, undefined);
    win.bar = win.add("progressbar", {x: 20,y: 12,width: 300,height: 20}, 0, 100);
    win.stMessage = win.add("statictext", {x: 10,y: 36,width: 320,height: 20}, "" + message);
    win.stMessage.justify = 'center';
    if (hasCancelButton) {
        win.cancelButton = win.add('button', undefined, 'Cancel');
        win.cancelButton.onClick = function() {
            win.close();
            throw new Error('User canceled the pre-processing!');
    this.reset = function(message) {
        win.bar.value = 0;
        win.stMessage.text = message;
        return win.update();
    this.updateProgress = function(perc, message) {
        if (perc != null) {
            win.bar.value = perc;
        if (message != null) {
            win.stMessage.text = message;
    return win.update();
    this.close = function() {
        return win.close();
    win.center(win.parent);
    return win.show();