when select a Flex tree item or moving on it , there is
always a color bar which cross the whold width of the tree item. I
want to customize tree item that only text area backgroud is
changed when selected or move on it, not the whold item backgroud.
That is an interesting problem you have there. I tried a few
things and couldn't get it to work. I think what you might end up
having to do is create a new class that derives from TreeItemRender
and add methods that draw your own graphics for the tree item.
There is a great example with code that you can download