I have not got any progress particularly "Graph" tab, but I made some sample vizualization project https://github.com/lapanoid/GephiVisApp
- it is based on https://gephi.org/toolkit/
and Preview component.
Now I'm stuck in attempts making this app interactive, I wrote about it here http://forum.gephi.org/viewtopic.php?f= ... t=10#p9336
About "graph" tab.. I have not found any opportunity to use it throw gephi-toolkit, I guess it is not possible for now.
Downloading gephi source code, rewrite for these needs seems like the only option, but it's too hard to do on my own.
Who knows maybe right now gephi guy's are moving in the same direction:)