enableSmartRendering and use 3-state checkboxes

I looked the dhtmlx API when set tree.enableSmartRendering(true),
This result Smart Rendering is a very good case and the speed is very fast ,This is what I want and demand the most
but API Explained that should be taken into account is that this mode is incompatible with Distributed Parsing and Three-state checkboxes.

The problem: (Premise is to use tree.enableSmartRendering(true); tree.enableCheckBoxes(true);tree.enableThreeStateCheckboxes(true):wink:

  1. I am using the free version with GPL license terms and conditions
  2. Why not support the Three-state checkboxes , this reason ???
    3.Show only the parent node, child node does not show why???
    4.the Professional Edition will have this problem?

Who can give me some advice
Thanks

The answer has been given here:

viewtopic.php?f=3&t=13069&p=37936#p37936