Activate a different Layer when both function keys are depressed

Programming
8

This is the issue: ShiftToLayer is a markup only useful in the keymap. It translates to a keycode, and that’s about it. The above code is essentially this:

void stl_DoubleFunk(uint8_t combo_index) { 
  (Key){.flags = SYNTHETIC | SWITCH_TO_KEYMAP,
        .keyCode = DOUBLE_FUNK + LAYER_SWITCH_OFFSET};
}

…and this isn’t exactly useful in this context. You’ll need to use the Layer.on()/Layer.off() functions directly:

void stl_DoubleFunk(uint8_t combo_index) {
  if (Layer.isOn(DOUBLE_FUNK)) {
    Layer.off(DOUBLE_FUNK);
  } else {
    Layer.on(DOUBLE_FUNK);
  }
}

Mind you, you can only toggle layers with MagicCombo, you can’t do momentary layers as with ShiftToLayer, due to technical reasons. If that’s what you want, we’ll have to find another solution :confused: