1 #include QMK_KEYBOARD_H
3 #define _BASE 0 // Base layer
4 #define _SYSTEM 1 // System actions
5 #define _VOLUME 2 // Volume actions
7 #define SUPER_ALT_F4_TIMER 300 // Timeout on the super alt-f4 key
10 The idea of this is pretty simple: base layer has four action, two of which (the outermost)
11 are regular keystrokes on tap, and a momentary layer switch on hold, sending you to layers 1 and 2.
13 The other bit of customization here is the 'Super Alt F4' which does Alt-F4, and then Enter if tapped
14 again SUPER_ALT_F4_TIMER miliseconds after. This lets you Alt-F4 applications, and finally quickly
15 double-tap it to Alt-F4+Enter to shut down the PC.
18 bool is_alt_f4_active = false;
19 uint16_t alt_f4_timer = 0;
21 enum custom_keycodes { // Make sure have the awesome keycode ready
22 SUPER_ALT_F4 = SAFE_RANGE,
25 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
28 [_BASE] = LAYOUT_all(LT(_SYSTEM, KC_F5), C(G(KC_LEFT)), C(G(KC_RIGHT)), LT(_VOLUME, KC_F7)),
31 [_SYSTEM] = LAYOUT_all(_______, SUPER_ALT_F4, G(KC_D), G(KC_L)),
34 [_VOLUME] = LAYOUT_all(KC_MEDIA_NEXT_TRACK, KC_AUDIO_VOL_DOWN, KC_AUDIO_VOL_UP, _______),
38 bool process_record_user(uint16_t keycode, keyrecord_t *record) {
39 switch (keycode) { // This will do most of the grunt work with the keycodes.
41 if (record->event.pressed) {
42 if (!is_alt_f4_active) {
43 is_alt_f4_active = true;
44 tap_code_16(LALT(KC_F4); // Alt-F4
46 tap_code(KC_ENTER); // Tap enter
49 unregister_code(KC_TAB);
51 alt_f4_timer = timer_read();
57 void matrix_scan_user(void) {
58 if (is_alt_f4_active && timer_elapsed(alt_f4_timer) > SUPER_ALT_F4_TIMER) {
59 is_alt_f4_active = false;