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@@ -328,6 +328,51 @@ If you, for example, use multiple base layers for different key layouts, one for
With `#define COMBO_ONLY_FROM_LAYER 0` in config.h, the combos' keys are always checked from layer `0`, even if other layers are active.
+### Combo reference layers by layer.
+
+If not using `COMBO_ONLY_FROM_LAYER` it is possible to specify a
+combo reference layer for any layer using the `combo_ref_from_layer` hook.
+The combo macros automatically create this function from the `COMBO_REF_LAYER()`
+entries given.
+
+This function returns the assigned reference layer for the current layer.
+if there is no match, it returns the default reference layer if set,
+or the current layer otherwise. A default layer can be set with
+`DEFAULT_REF_LAYER(_MY_COMBO_REF_LAYER)`
+
+If not set, the default reference layer selection from the automatically generated
+`combo-ref-from-layer()` will be the current layer.
+
+The following `combo_ref_from_layer` function
+will give a reference layer of _QWERTY for the _DVORAK layer and
+will give the _NAV layer as a reference to it's self. All other layers
+will have the default for their combo reference layer. If the default
+is not set, all other layers will reference themselves.
+
+ ```c
+ #define COMBO_REF_DEFAULT _MY_COMBO_LAYER
+ ...
+
+ uint8_t combo_ref_from_layer(uint8_t layer){
+ switch (get_highest_layer(layer_state)){
+ case _DVORAK: return _QWERTY;
+ case _NAV: return _NAV;
+ default: return _MY_COMBO_LAYER;
+ }
+ return layer; // important if default is not in case.
+ }
+
+ ```
+
+ The equivalent definition using the combo macros is this:
+
+ ```c
+ COMBO_REF_LAYER(_DVORAK, _QWERTY)
+ COMBO_REF_LAYER(_NAV, _NAV)
+ DEFAULT_REF_LAYER(_MY_COMBO_LAYER).
+ ```
+
+
## User callbacks
In addition to the keycodes, there are a few functions that you can use to set the status, or check it:
@@ -350,6 +395,11 @@ First, you need to add `VPATH += keyboards/gboards` to your `rules.mk`. Next, in
Then, write your combos in `combos.def` file in the following manner:
```c
+// Alternate reference layers by layer
+// Layer Reference layer
+COMBO_REF_LAYER(_DVORAK, _QWERTY) // reference the qwerty layer for dvorak.
+COMBO_REF_LAYER(_NAV, _NAV) // explicit reference to self instead of the default.
+
// name result chord keys
COMB(AB_ESC, KC_ESC, KC_A, KC_B)
COMB(JK_TAB, KC_TAB, KC_J, KC_K)