Any tutorial for this?

Hello guys, how do I make a custom top bar for a desktop application? JavaFX

Here is a screenshot of what I am talking: http://imgur.com/a/hKzo6

I can remove this one using Stage.iniStyle(StageStyle.UNDECORATED);
but then I can't move the window anymore.

I want to make a image in photoshop to be used as a top bar, how do I allow the window to be moved when you drag it from that said image?