Проблема с Ext.direct + Ext.tree

paramsAsHash: Boolean
Only used when using directFn. Send parameters as a collection of named arguments (defaults to false). Providing a paramOrder nullifies this configuration.

requestData : function(node, callback, scope){
    if(this.fireEvent("beforeload", this, node, callback) !== false){
        if(this.directFn){
            var args = this.getParams(node);
            args.push(this.processDirectResponse.createDelegate(this, [{callback: callback, node: node, scope: scope}], true));
            this.directFn.apply(window, args);
        }
…
}

…

getParams: function(node){
    var bp = Ext.apply({}, this.baseParams),
    np = this.nodeParameter,
    po = this.paramOrder;

    np && (bp[ np ] = node.id);

    if(this.directFn){
        var buf = [node.id];
        …
        if(this.paramsAsHash){
            buf = [bp];
        }
        return buf;
…
}

To pass extra parameters, an event handler may be attached to the «beforeload» event, and the parameters specified in the TreeLoader's baseParams property.