[flexcoders] how to associate editable propperty of tree node on double clikck not click

[qau_yasir]

Hello All!
  I have a tree aTree, I have set its property aTree.editable = true;
  When I click (select)any node, node behavious as editable, I need to 
set this property on double click not on just click.
Any body know how to do this? please help.

 thanks and Regards
 YM