How to listen for whether the option key is pressed in the right-click menu？

[Real (RealType)]

New API: Draw in Font View Glyph Cells

Font View not updating is a known limitation of the API currently. I would want to fix that and also offer an API to allow plug-ins to manually refresh the Font View cells when desired. If you have any specific needs in mind, let me know and I’ll see how to best incorporate it.

I want to update Font View cells manually,Is there an interface?