How to access a table for changes

Question

I'm iterating through the Pgf objects in a flow, and for each one I look for table anchors. I find the table anchor, then what do I do to access its Tbl object and do things with it? I'm just trying to find out if there are any changebars in the table. I don't think using Doc.FirstTblInDoc will help me because I'm starting with a TblAnchor text item.
I run this code on a doc that has only one paragraph with a table anchor in it:
function test() {
    doc = app.ActiveDoc;
    var pgf = doc.MainFlowInDoc.FirstTextFrameInFlow.FirstPgf;
    while ( pgf.ObjectValid() ) {
    var textitems = pgf.GetText(Constants.FTI_TblAnchor);
    var aa = textitems[0];
    Console('what is this: '+aa);
    pgf = pgf.NextPgfInFlow;
This prints "what is this: [object TextItem]".
Seems like I should be able to do something like this to get the Tbl object:
myTable = textitems[0].idata;
Am I warm? Once I get the Tbl object, I'm hoping it's a simple matter of using GetText to get changes, then finding a changebar.
Thanks,
Mark

Answer 1

Here's the working code I ended up using to search through a table and find out if it had any changebars.
Mark
// Find a changebar in tables. The context is iterating through the Pgfs in a doc.
function findChangebarInTable(pgf) {
    var tableitems = pgf.GetText(Constants.FTI_TblAnchor);
    // If no table anchors, return now.
    if (tableitems.length == 0) { return; }
    for (var i = 0; i < tableitems.length ; i += 1) {
        // get table using table anchor.
        var table = tableitems[i].obj;
        cellChangebar = searchCells(table);
        // If there's a changebar in any table, return.
        if (cellChangebar) {
            return true;
// Search the cells of the table for a changebar.
function searchCells(table) {
    var tcell = table.FirstRowInTbl.FirstCellInRow;
    while (tcell.ObjectValid()) {
        // Get changed items in this cell.
        var cellitems = tcell.GetText(Constants.FTI_CharPropsChange);
        for (var i=0; i < cellitems.len ; i +=1) {
            // Find out if the Cell has a changebar.
            // The result of the bitwise AND (&) must be greater than 0 or no changebar.
            var c = cellitems[i].idata & Constants.FTF_CHANGEBAR;
            if (c > 0) {
                return true;
        tcell = tcell.NextCellInTbl;