So, will it work?

[Gaja Sutra]

>  Our subject is a desktop app that would help writers in writing books
>  - novels mostly.

>  But what we need are just some UI controls - to make main interface,
>  that is all menus, navigation, etc [similar to what Word has]. Is it
>  possible with current OpenJFX release?

I think you need to verify if features supported for multi-styled text 
are sufficient for your needs (currently mostly HTMLEditor on Webkit).

http://docs.oracle.com/javafx/2.0/api/javafx/scene/web/HTMLEditor.html

Daniel.