Auto select an item in a child node of a TreeView UI control?

Question

Hi There,
I'm having some issues with a TreeView control in my UI that I cannot seem to resolve, and thought I would ask if anybody here has done this type of thing.  My TreeView is made up of a collection of nodes, each with some child items.  When the window containing the TreeView displays, I populate it with the nodes.  I want to be able to script the selection within the TreeView, but I want the script to select a child items, not just their parent nodes.  Is this possible?  I know it is possible to selecting the parent nodes in a TreeView, but I cannot seem to get the code for selecting, via scripting, a child item of a node in a TreeView.  Any thoughts on how to acheive this?
Thanks for your time and help!
Best,
Arie
Here is some of the code I am using for auto-selecting child items of nodes in the TreeView:
                    //Code to populate the TreeView (picker) goes here
                    //Highlight the last selection
                    for (var i=0; i < picker.items.length; i++)
                        if (picker.items[i].title == SAVED_TITLE){
                            picker.selection = picker.items[i];
                            picker.selection.expanded = true;
                            for (var x=0; x < picker.selection.items.length; x++) {
                                if (picker.selection.items[x].marker == SAVED_MARKER){
                                    picker.selection = picker.selection.items[x];  //turns out the indices are relative to it's parent, not the picker's indices
                                    break;
                            break;

Answer 1

I had some of the above code wrong:
    // function to filter jsx files------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ -----------------------//
    function filterJSXFiles(file)
        return ((file.name.match(/.jsx(bin)?$/) != null) && (file.name != (new File($.fileName)).name));
    // Collect files in folder that holds Burrow AFX scripts---------------------------------------------------------------------------------- -----------------------------------------------------------------------------//
    var brws_ScriptFolder = "Z:\\apps\\after_effects\\AFX_Scripts\\"; 
    //print(brws_ScriptFolder)
    if (brws_ScriptFolder != null)
         var fileList = Folder(brws_ScriptFolder).getFiles(filterJSXFiles);
         //print( fileList)
        function myScript(thisObj){
        function myScript_BuildUI(thisObj){
            var myPanel = (thisObj instanceof Panel) ? thisObj : new Window("palette", "AFX SCripts", undefined, {resizeable:true});           
            res = "group{orientation:'row', alignment:['fill', 'fill'] , alignChildren:['fill', 'fill'], \
                groupOne: Group{orientation:'column', alignment:['fill', 'fill'] , alignChildren:['fill', 'fill'], myMultiTreeView: TreeView{}   }     }     }"; // creating a resource string, controls go here
            myPanel.grp = myPanel.add(res);           
            var brws_ScripIconsDir = "Z:\\apps\\after_effects\\burrowsAFX_Script_Icons\\burrowsIconForAFX\\";   
            var jsxExt = ".jsx";
            //Add Treeview items and icons------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ -----//
            var brws_TopNode = myPanel.grp.groupOne.myMultiTreeView.add("node", "Burrows AFX Scripts");
            brws_TopNode.image = File( brws_ScripIconsDir + "BurrowsIcon20x20.png" ); 
            //brws_TopNode.helpTip = "This is the help. Is it not THE greatest thing you have seen?"
            var brws_AsciiGenerator_1_2 = brws_TopNode.add("item", "AsciiGenerator_1_2");     // CURRENTLY THROWS RESOURCE ERROR
            brws_AsciiGenerator_1_2.image = File( brws_ScripIconsDir + "AsciiGenerator_1_2.png");
            // EVENTS----------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------ ---------------------------------//
            myPanel.grp.groupOne.myMultiTreeView.addEventListener('change', function (event)
                     if (myPanel.grp.groupOne.myMultiTreeView.selection.text ===  'AsciiGenerator_1_2') { fn_AsciiGenerator_1_2(); }
               }, false);// End of Event Listener
            function fn_AsciiGenerator_1_2()
                var asciiGenLoc = (brws_ScriptFolder + "AsciiGenerator_1_2" + jsxExt);
                var scr_asciiGenLoc =  new File(asciiGenLoc);
                if (scr_asciiGenLoc.exists) { scr_asciiGenLoc.open("r"); var scriptContent = scr_asciiGenLoc.read(); scr_asciiGenLoc.close(); eval(scriptContent); }
                myPanel.grp.groupOne.myMultiTreeView.selection = brws_TopNode;
            //Setup panel sizing----------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------ --------------------//
            myPanel.layout.layout(true);
            myPanel.grp.minimumSize = myPanel.grp.size;
            //Make panel resizeable------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------ ------------------//
            myPanel.layout.resize();
            myPanel.onResizing = myPanel.onResize = function(){this.layout.resize()}           
            return myPanel;            
            }// End of myScript_BuildUI------------------------------------------------------------------------- ------------------------------------------------------------------------------------------ -------------------// 
        // Create the UI--------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------ --------------------------//
        var myScriptPal = myScript_BuildUI (thisObj)
        if( (myScriptPal != null) && (myScriptPal instanceof Window) )
            myScriptPal.center();
            myScriptPal.show();
        }// End of if Statement-------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------ ---------------------//
        }// End of myScript function
myScript(this);
}// End of script