I have created custom TreeItemRenderer in which i am trying
to draw colored Hbox bar at each node except root. Intially when i
click on root node it opens first child node with bar but when i
open leaf node it does not showing bar and removing existing bard
from other few child nodes. Its calling itemrenderer on mouseonver
eventhough i have disabled. I am attaching code would please help
me to resolve this issue.