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< p > < a href = "#page_The-Leader-Key-A-New-Kind-of-Modifier" > The Leader Key: A New Kind of Modifier< / a > < / p >
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< h1 id = "page_The-Leader-Key-A-New-Kind-of-Modifier" > The Leader Key: A New Kind of Modifier< / h1 >
< p > If you've ever used Vim, you know what a Leader key is. If not, you're about to discover a wonderful concept. :) Instead of hitting Alt+Shift+W for example (holding down three keys at the same time), what if you could hit a < em > sequence< / em > of keys instead? So you'd hit our special modifier (the Leader key), followed by W and then C (just a rapid succession of keys), and something would happen.< / p >
< p > That's what < code > KC_LEAD< / code > does. Here's an example:< / p >
< ol >
< li > Pick a key on your keyboard you want to use as the Leader key. Assign it the keycode < code > KC_LEAD< / code > . This key would be dedicated just for this -- it's a single action key, can't be used for anything else.< / li >
< li > Include the line < code > #define LEADER_TIMEOUT 300< / code > somewhere in your keymap.c file, probably near the top. The 300 there is 300ms -- that's how long you have for the sequence of keys following the leader. You can tweak this value for comfort, of course.< / li >
< li > Within your < code > matrix_scan_user< / code > function, do something like this:< / li >
< / ol >
< pre > < code > LEADER_EXTERNS();
void matrix_scan_user(void) {
LEADER_DICTIONARY() {
leading = false;
leader_end();
SEQ_ONE_KEY(KC_F) {
register_code(KC_S);
unregister_code(KC_S);
}
SEQ_TWO_KEYS(KC_A, KC_S) {
register_code(KC_H);
unregister_code(KC_H);
}
SEQ_THREE_KEYS(KC_A, KC_S, KC_D) {
register_code(KC_LGUI);
register_code(KC_S);
unregister_code(KC_S);
unregister_code(KC_LGUI);
}
}
}
< / code > < / pre >
< p > As you can see, you have three function. you can use - < code > SEQ_ONE_KEY< / code > for single-key sequences (Leader followed by just one key), and < code > SEQ_TWO_KEYS< / code > and < code > SEQ_THREE_KEYS< / code > for longer sequences. Each of these accepts one or more keycodes as arguments. This is an important point: You can use keycodes from < strong > any layer on your keyboard< / strong > . That layer would need to be active for the leader macro to fire, obviously.< / p >
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