[ExtJS] modx-combo-brower to select folder instead of file ?[SOLVED]

       [...]
       {  
           xtype: 'picman-combo-folders',
            fieldLabel: 'Folder',
            name: 'name',
            hiddenName: 'name',
            anchor: '100%'     
        }     

Picman.combo.Folders = function(config){
    config = config || {};
    Ext.applyIf(config,{
        id: 'picman-combo-folders',   
        url: Picman.config.connectorUrl,
        baseParams: {
            action: 'mgr/images/getListFolder'
        },
        store: new Ext.data.JsonStore({
            autoLoad: true,
            url: Picman.config.connectorUrl,
            baseParams: {
                action: 'mgr/images/getListFolder'
            },
            id:0,  // these lines are my problem what is the 'field' I call regarding my processor ? 
            fields: ['name'],
            displayField: 'name',
            valueField: 'name'
            // 
        })

        
    });
    Picman.combo.Folders.superclass.constructor.call(this, config);
};
Ext.extend(Picman.combo.Folders,MODx.combo.ComboBox);
Ext.reg('picman-combo-folders',Picman.combo.Folders);

class picmanGetListFolderProcessor extends modProcessor {
    public function process() {
        $assetspath = $this->modx->config['assets_path'];
        $dir = $assetspath . 'master/img';
        $stack[] = $dir;
        while ($stack) {
            $thisdir = array_pop($stack);
            if ($dircont = scandir($thisdir)) {
                $i = 0;
                while (isset($dircont[$i])) {
                    if ($dircont[$i] !== '.' && $dircont[$i] !== '..') {
                        $current_file = "{$thisdir}/{$dircont[$i]}";
                        //$this->modx->log(modX::LOG_LEVEL_ERROR, ' - curfile :' . $current_file);
                        if (is_file($current_file)) {
                            $path[] = "";
                        } elseif (is_dir($current_file)) {
                            $path[] = "{$thisdir}/{$dircont[$i]}";
                            $stack[] = $current_file;
                        }
                    }
                    $i++;
                }
            }
        }

        $lp = count($path);
        $this->modx->log(modX::LOG_LEVEL_ERROR, 'lp :' . $lp);
        for ($x = 0; $x < $lp; $x++) {
            $suppr = $assetspath . master/img/';
            $this->modx->log(modX::LOG_LEVEL_ERROR, $x . ' - path :' . $path[$x]);
            $fold = $path[$x];
            $this->modx->log(modX::LOG_LEVEL_ERROR, $x . ' - fold :' . $fold);
            if ($fold != '') {
                $folder = str_replace($suppr, '', $fold);
                $this->modx->log(modX::LOG_LEVEL_ERROR, $x . ' - folder :' . $folder);
                $myArray[] = $folder;
            }
        }

        $this->modx->log(modX::LOG_LEVEL_ERROR, 'path ' . print_r($myArray));
//        Prints :
//        Array
//        (
//            [0] => abc
//            [1] => def
//            [2] => ghij
//            [3] => klm
//            [4] => mnop
//            [5] => mnop/abcd
//            [6] => mnop/efgh
//            [7] => mnop/ijkl
//        )

        return $this->toJSON($myArray);
//        in FF it gives (which is correct I think):
//        ["abc","def","ghij","klm","mnop","mnop\/abcd","mnop\/efgh","mnop\/ijkl"]

    }
}
return 'picmanGetListFolderProcessor';