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Update to tap dance docs (#2895)

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* Added more comments
    * Documentation for 'quad function' tap dance now suggests to use the
      user's directory, and explains how to do so.
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Daniel Gordon 2018-05-04 12:39:57 -05:00 committed by Drashna Jaelre
parent 1806509ad5
commit e6be4484e9
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122
docs/feature_tap_dance.md
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@ -179,41 +179,123 @@ Below is a specific example:
* Double Tap = Send `Escape`
* Double Tap and Hold = Send `Alt`
The following example can be easily expanded to more than 4 quite easily:
## Setup
You will need a few things that can be used for 'Quad Function Tap-Dance'. The suggested setup is to create a user directory for yourself. This directory will contain rules.mk `<your_name>.c` and `<your_name>.h`. This directory should be called `<your_name>`, and located in the top level `users` directory. There should already be a few examples to look at there.
### In `/qmk_firmware/users/<your_name>/rules.mk`
Put the following:
```c
//**************** Definitions needed for quad function to work *********************//
//Enums used to clearly convey the state of the tap dance
TAP_DANCE_ENABLE = yes
SRC += your_name.c
```
Pretty simple. It is a nice way to keep some rules common on all your keymaps.
### In `/qmk_firmware/users/<your_name>/<you_name>.h`
You will need a few things in this file:
```c
#ifndef YOUR_NAME
#define YOUR_NAME
#include "quantum.h"
#include "process_keycode/process_tap_dance.h"
typedef struct {
bool is_press_action;
int state;
} xtap;
enum {
SINGLE_TAP = 1,
SINGLE_HOLD = 2,
DOUBLE_TAP = 3,
DOUBLE_HOLD = 4,
DOUBLE_SINGLE_TAP = 5 //send SINGLE_TAP twice - NOT DOUBLE_TAP
// Add more enums here if you want for triple, quadruple, etc.
DOUBLE_SINGLE_TAP = 5, //send two single taps
TRIPLE_TAP = 6,
TRIPLE_HOLD = 7
};
typedef struct {
bool is_press_action;
int state;
} tap;
//Tap dance enums
enum {
CTL_X = 0,
SOME_OTHER_DANCE
}
int cur_dance (qk_tap_dance_state_t *state);
//for the x tap dance. Put it here so it can be used in any keymap
void x_finished (qk_tap_dance_state_t *state, void *user_data);
void x_reset (qk_tap_dance_state_t *state, void *user_data);
```
### In `/qmk_firmware/users/<your_name>/<your_name>.c`
And then in your user's `.c` file you implement the functions above:
```c
#include "gordon.h"
#include "quantum.h"
#include "action.h"
#include "process_keycode/process_tap_dance.h"
/* Return an integer that corresponds to what kind of tap dance should be executed.
*
* How to figure out tap dance state: interrupted and pressed.
*
* Interrupted: If the state of a dance dance is "interrupted", that means that another key has been hit
* under the tapping term. This is typically indicitive that you are trying to "tap" the key.
*
* Pressed: Whether or not the key is still being pressed. If this value is true, that means the tapping term
* has ended, but the key is still being pressed down. This generally means the key is being "held".
*
* One thing that is currenlty not possible with qmk software in regards to tap dance is to mimic the "permissive hold"
* feature. In general, advanced tap dances do not work well if they are used with commonly typed letters.
* For example "A". Tap dances are best used on non-letter keys that are not hit while typing letters.
*
* Good places to put an advanced tap dance:
* z,q,x,j,k,v,b, any function key, home/end, comma, semi-colon
*
* Criteria for "good placement" of a tap dance key:
* Not a key that is hit frequently in a sentence
* Not a key that is used frequently to double tap, for example 'tab' is often double tapped in a terminal, or
* in a web form. So 'tab' would be a poor choice for a tap dance.
* Letters used in common words as a double. For example 'p' in 'pepper'. If a tap dance function existed on the
* letter 'p', the word 'pepper' would be quite frustating to type.
*
* For the third point, there does exist the 'DOUBLE_SINGLE_TAP', however this is not fully tested
*
*/
int cur_dance (qk_tap_dance_state_t *state) {
if (state->count == 1) {
//If count = 1, and it has been interrupted - it doesn't matter if it is pressed or not: Send SINGLE_TAP
if (state->interrupted || state->pressed==0) return SINGLE_TAP;
if (state->interrupted || !state->pressed) return SINGLE_TAP;
//key has not been interrupted, but they key is still held. Means you want to send a 'HOLD'.
else return SINGLE_HOLD;
}
//If count = 2, and it has been interrupted - assume that user is trying to type the letter associated
//with single tap. In example below, that means to send `xx` instead of `Escape`.
else if (state->count == 2) {
/*
* DOUBLE_SINGLE_TAP is to distinguish between typing "pepper", and actually wanting a double tap
* action when hitting 'pp'. Suggested use case for this return value is when you want to send two
* keystrokes of the key, and not the 'double tap' action/macro.
*/
if (state->interrupted) return DOUBLE_SINGLE_TAP;
else if (state->pressed) return DOUBLE_HOLD;
else return DOUBLE_TAP;
}
else return 6; //magic number. At some point this method will expand to work for more presses
//Assumes no one is trying to type the same letter three times (at least not quickly).
//If your tap dance key is 'KC_W', and you want to type "www." quickly - then you will need to add
//an exception here to return a 'TRIPLE_SINGLE_TAP', and define that enum just like 'DOUBLE_SINGLE_TAP'
if (state->count == 3) {
if (state->interrupted || !state->pressed) return TRIPLE_TAP;
else return TRIPLE_HOLD;
}
else return 8; //magic number. At some point this method will expand to work for more presses
}
//**************** Definitions needed for quad function to work *********************//
//instanalize an instance of 'tap' for the 'x' tap dance.
static tap xtap_state = {
@ -245,6 +327,10 @@ void x_reset (qk_tap_dance_state_t *state, void *user_data) {
}
xtap_state.state = 0;
}
qk_tap_dance_action_t tap_dance_actions[] = {
[X_CTL] = ACTION_TAP_DANCE_FN_ADVANCED(NULL,x_finished, x_reset)
};
```
And then simply add this to your list of tap dance functions:
`[X_TAP_DANCE] = ACTION_TAP_DANCE_FN_ADVANCED(NULL, x_finished, x_reset)`
And then simply use TD(X_CTL) anywhere in your keymap.