Any 3state Check Tree Ctrl for wxPython available?

[Petr Prikryl]

Hi,

I am experimenting with wxPython on Windows box. 
What I need to implement is a check tree control
with 3 states for each checkbox: unchecked, checked,
gray checked. The status of the checkbox should reflect
the status of the children. When ALL children are checked,
then the status should be checked. When NO children
are checked, the status should be unchecked. When 
SOME children are selected, the status should be
checked with gray background.

I have found something else that could be valuable
after I start understand that:

http://mitglied.lycos.de/drpython/CheckTreeCtrl.tar 

Anyway, is there something similar with 3 states
available around?

Thanks for your time and experience,

pepr

-- 
Petr Prikryl (prikrylp at skil dot cz)