aye treeform thankyou for your clarification.
let me explain that I’m almost a pythoner and not very much skilled so I’d made it from that point of view, knowing not much what there is under the hood of p3d engine. Said this my needs were to manage something closer to what did chombee with his ZUI interface where he got a complex object composed by a model, a bunch of directgui objects like directframes, buttons etc… that have to be zoomed with a click of the mouse. Instances of this object have to be collected under and managed by a container as child nodes. This is why I did this.