Calendar Context menu for event not for cell

Currently in Timesheets project of yours I see that context menu items are only customized per cell not per click target.

If I right click on free space in cell I get context menu items for events in it if there’s at least one event.
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However if action intended for event is applied to cell error occurs
Applied delete to blank space in cell:
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Can it be done so that:
I rightClick event and get ONLY items for it in contextMenu
I rightClick free space and I only get “add” in contextMenu
?
So can context menu be customized on basis of click target not of cell ?
Unfortunately documentation seems to say NO
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But maybe there’s some way? (To invent custom calendar from sources of Vaadin Calendar? Even your Cuba team hasn’t done that, has it? ( Or something simpler)

Maybe it’s achievable using some ContextMenu add-on created by Peter Lehto
https://www.oreilly.com/library/view/vaadin-7-cookbook/9781849518802/ch05s08.html
What about it’s support in Cuba? Maybe it’s what I need
Vaadin-context-menu - #6 от пользователя gorelov - CUBA.Platform I’ll look at it

Isn’t it impossible to overcome this? I’ll be looking into it in-deep soon