Simulate a held-down key

[musjj]

KEY_XXX:
  held: [KEY_YYY]
  alone: [KEY_ZZZ]

Currently it's not possible to hold down KEY_ZZZ using KEY_XXX.

In dual-function-keys, there's an option that makes this possible. So when you double-tap KEY_XXX and hold it, it will act as if KEY_ZZZ is being held-down.

Here's an explanation snipped from the readme:

Tap then press again with DOUBLE_TAP_MILLIS (default 150ms) to hold DE.

                             <-------150ms------->
                <---------200ms--------->
keyboard:       LS↓         LS↑             LS↓               LS↑
computer sees:  LS↓         LS↑ DE↓ DE↑     DE↓ ..(repeats).. DE↑

You can continue double tapping so long as it is within the DOUBLE_TAP_MILLIS window.

[k0kubun]

when you double-tap KEY_XXX and hold it, it will act as if KEY_ZZZ is being held-down.

Interesting. I would accept a pull request to add such a feature.

Out of curiosity, what do you use the feature for? It's not about keys X, Y, and Z, right?

[musjj]

I was using it for my Enter mapping:

modmap:
  - remap:
      Enter:
        alone:
          - Enter
        held:
          - Alt_L

Currently, it's not possible to hold down Enter this way. It's not a super big deal, but I'll consider making a PR.