Usecase: what if somebody wants to map Numpad direction keys to joystick directions and left ctrl to joystick fire button?
p.s. I don't understand a purpose of (currently available) mapping of ZXSpectrum-compatible keys to joystick which is then (anyway) mapped to keys of emulated Speccy. Doesn't it break emulation of Speccy's keyboard?
I guess that means using the numpad as a joystick would work well. I didn't realise I was asking for a new feature - I was just wandering if there was a way of doing this.
I mean Your question is exactly about this (not yet implemented) feature.
(Excuse me my bad English)
I thought the feature was there
but I hadn't found it.