What is Application.getApplication() here? The JavaFX Application class does not have a setOpenFileHandler method. Is that a Mac-specific API?
It's too bad that 8u40 won't have this. Being able to easily open double clicked files is pretty basic. Perhaps post 8u40 the JFX team could go through Scene Builder and identify everywhere it relies on internal APIs or custom magic and suck it into the core API, as then you'd have confidence that an app of real complexity can be done entirely with documented stuff.
