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Add documentation for Combo feature

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Drashna Jaelre 2018-10-10 12:38:10 -07:00 committed by Jack Humbert
parent 43757cd985
commit a7d05820a6
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* [Backlight](feature_backlight.md)
* [Bluetooth](feature_bluetooth.md)
* [Bootmagic](feature_bootmagic.md)
* [Combos](feature_combo)
* [Command](feature_command.md)
* [Dynamic Macros](feature_dynamic_macros.md)
* [Grave Escape](feature_grave_esc.md)

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* [Backlight](feature_backlight.md)
* [Bluetooth](feature_bluetooth.md)
* [Bootmagic](feature_bootmagic.md)
* [Combos](feature_combo)
* [Command](feature_command.md)
* [Dynamic Macros](feature_dynamic_macros.md)
* [Grave Escape](feature_grave_esc.md)

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@ -155,6 +155,10 @@ If you define these options you will enable the associated feature, which may in
going to produce the 500 keystrokes a second needed to actually get more than a
few ms of delay from this. But if you're doing chording on something with 3-4ms
scan times? You probably want this.
* `#define COMBO_COUNT 2`
* Set this to the number of combos that you're using in the [Combo](feature_combo.md) feature.
* `#define COMBO_TERM 200`
* how long for the Combo keys to be detected. Defaults to `TAPPING_TERM` if not defined.
## RGB Light Configuration
@ -234,6 +238,8 @@ Use these to enable or disable building certain features. The more you have enab
* Console for debug(+400)
* `COMMAND_ENABLE`
* Commands for debug and configuration
* `COMBO_ENABLE`
* Key combo feature
* `NKRO_ENABLE`
* USB N-Key Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
* `AUDIO_ENABLE`

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docs/feature_combo.md Normal file
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# Combos
The Combo feature is a chording type solution for adding custom actions. It lets you hit multiple keys at once and produce a different effect. For instance, hitting `A` and `S` within the tapping term would hit `ESC` instead, or have it perform even more complex tasks.
To enable this feature, yu need to add `COMBO_ENABLE = yes` to your `rules.mk`.
Additionally, in your `config.h`, you'll need to specify the number of combos that you'll be using, by adding `#define COMBO_COUNT 1` (replacing 1 with the number that you're using).
<!-- At this time, this is necessary -->
Also, by default, the tapping term for the Combos is set to the same value as `TAPPING_TERM` (200 by default on most boards). But you can specify a different value by defining it in your `config.h`. For instance: `#define COMBO_TERM 300` would set the time out period for combos to 300ms.
Then, your `keymap.c` file, you'll need to define a sequence of keys, terminated with `COMBO_END`, and a structure to list the combination of keys, and it's resulting action.
```c
const uint16_t PROGMEM test_combo[] = {KC_A, KC_B, COMBO_END};
combo_t key_combos[COMBO_COUNT] = {COMBO(test_combo, KC_ESC)};
```
This will send "Escape" if you hit the A and B keys.
!> This method only supports [basic keycodes](keycodes_basic.md). See the examples for more control.
## Examples
If you want to add a list, then you'd use something like this:
```c
enum combos {
AB_ESC,
JK_TAB
}
const uint16_t PROGMEM ab_combo[] = {KC_A, KC_B, COMBO_END};
const uint16_t PROGMEM jk_combo[] = {KC_J, KC_K, COMBO_END};
combo_t key_combos[COMBO_COUNT] = {
[AB_ESC] = COMBO(ab_combo, KC_ESC),
[JK_TAB] = COMBO(jk_combo, KC_TAB)
};
```
For a more complicated implementation, you can use the `process_combo_event` function to add custom handling.
```c
enum combo_events {
ZC_COPY,
ZV_PASTE
};
const uint16_t PROGMEM copy_combo[] = {KC_Z, KC_C, COMBO_END};
const uint16_t PROGMEM paste_combo[] = {KC_Z, KC_V, COMBO_END};
combo_t key_combos[COMBO_COUNT] = {
[ZC_COPY] = COMBO_ACTION(copy_combo),
[ZV_PASTE] = COMBO_ACTION(paste_combo),
};
void process_combo_event(uint8_t combo_index, bool pressed) {
switch(combo_index) {
case ZC_COPY:
if (pressed) {
register_code(KC_LCTL);
register_code(KC_C);
unregister_code(KC_C);
unregister_code(KC_LCTL);
}
break;
case ZV_PASTE:
if (pressed) {
register_code(KC_LCTL);
register_code(KC_V);
unregister_code(KC_V);
unregister_code(KC_LCTL);
}
break;
}
}
```
This will send Ctrl+C if you hit Z and C, and Ctrl+V if you hit Z and V. But you could change this to do stuff like change layers, play sounds, or change settings.
## Additional Configuration
If you're using long combos, or even longer combos, you may run into issues with this, as the structure may not be large enough to accommodate what you're doing.
In this case, you can add either `#define EXTRA_LONG_COMBOS` or `#define EXTRA_EXTRA_LONG_COMBOS` in your `config.h` file.
You may also be able to enable action keys by defining `COMBO_ALLOW_ACTION_KEYS`.