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51 lines
3.0 KiB
Markdown
51 lines
3.0 KiB
Markdown
# Tri Layers {#tri-layers}
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This enables support for the OLKB style "Tri Layer" keycodes. These function similar to the `MO` (momentary) function key, but if both the "Lower" and "Upper" keys are pressed, it activates a third "Adjust" layer. To enable this functionality, add this line to your `rules.mk`:
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```make
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TRI_LAYER_ENABLE = yes
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```
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Note that the "upper", "lower" and "adjust" names don't have a particular significance, they are just used to identify and clarify the behavior. Layers are processed from highest numeric value to lowest, however the values are not required to be consecutive.
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For a detailed explanation of how the layer stack works, check out [Keymap Overview](../keymap#keymap-and-layers).
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## Keycodes {#keycodes}
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| Keycode | Alias | Description |
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|----------------------|-----------|---------------------------------------------------------------------------------------------------------|
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| `QK_TRI_LAYER_LOWER` | `TL_LOWR` | Momentarily enables the "lower" layer. Enables the "adjust" layer if the "upper" layer is also enabled. |
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| `QK_TRI_LAYER_UPPER` | `TL_UPPR` | Momentarily enables the "upper" layer. Enables the "adjust" layer if the "lower" layer is also enabled. |
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## Configuration
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To change the default values for the layers, you can change these defines, in your `config.h`
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| Config name | Default | Description |
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|--------------------------|---------|------------------------------------------|
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| `TRI_LAYER_LOWER_LAYER` | `1` | Sets the default for the "lower" layer. |
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| `TRI_LAYER_UPPER_LAYER` | `2` | Sets the default for the "upper" layer. |
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| `TRI_LAYER_ADJUST_LAYER` | `3` | Sets the default for the "adjust" layer. |
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Eg, if you wanted to set the "Adjust" layer to be layer 5, you'd add this to your `config.h`:
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```c
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#define TRI_LAYER_ADJUST_LAYER 5
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```
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## Functions
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| Function name | Description |
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|----------------------------------------------|-------------------------------------------------|
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| `set_tri_layer_lower_layer(layer)` | Changes the "lower" layer*. |
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| `set_tri_layer_upper_layer(layer)` | Changes the "upper" layer*. |
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| `set_tri_layer_adjust_layer(layer)` | Changes the "adjust" layer*. |
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| `set_tri_layer_layers(lower, upper, adjust)` | Sets the "lower", "upper" and "adjust" layers*. |
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| `get_tri_layer_lower_layer()` | Gets the current "lower" layer. |
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| `get_tri_layer_upper_layer()` | Gets the current "upper" layer. |
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| `get_tri_layer_adjust_layer()` | Gets the current "adjust" layer. |
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::: warning
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Note: these settings are not persistent, and will be reset to the default on power loss or power cycling of the controller.
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:::
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