[Feature request] An option to send specified key when button is pressed with a modifier

[rdtq]

Description of problem:

I have a setup that turns HJKL into navigation arrows while holding f:

nav_f  (tap-hold 500 f (layer-toggle navigation))

Navigation works beautifully. However, what I noticed is that when I type capital F, 90% of times it comes out as lowercase f. Looking at kmonad debug output I noticed it's because of a particular way I type when I'm typing fast:

(press Shift, press letter, release Shift, release letter)

That's a tough habit to get rid of.

Possible solution:

Have an option to tap-hold to send specified key when button is pressed with a modifier:

nav_f  (tap-hold 500 f (layer-toggle navigation) :modifier-shift: f)

[ramonwenger]

I just wanted to open this exact same issue (having configured the same navigation layer myself).

Maybe the solution could also be for kmonad to detect if a modifier was pressed on the keydown event, as opposed to the keyup event, as it currently seems to be implemented. (This is just a guess on my part, maybe kmonad does this completely differently)

[meain]

Here is a related issue: #50

This is the only thing that is kinda annoying thing for me at the moment.

[jchtt]

#256 is another related issue (duplicate?).

One way to address this is pull request #524 which I would love to get feedback on. If you're willing to compile your own version from this branch, you could give it a spin and tell me if that fixes it for you.