qmk_firmware/keyboards/keebio/bdn9/keymaps/mousepad/keymap.c

/* Copyright 2019 Danny Nguyen <danny@keeb.io>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include QMK_KEYBOARD_H


bool is_alt_tab_active = false;    // ADD this near the begining of keymap.c
uint16_t alt_tab_timer = 0;        // we will be using them soon.

enum custom_keycodes {             // Make sure have the awesome keycode ready
  ALT_TAB = SAFE_RANGE,
};


const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
    [0] = LAYOUT(
        KC_MS_BTN1, KC_MS_BTN2, KC_MS_BTN3, 
        KC_WH_U, ALT_TAB, KC_WH_L, 
        KC_WH_D, TT(1), KC_WH_R 
    ),
    [1] = LAYOUT(
        RESET,   KC_ACL0, KC_ACL1, 
        KC_VOLU, KC_ACL2, KC_BRIU, 
        KC_VOLD, TO(1),  KC_BRID 
    ),
};

void encoder_update_user(uint8_t index, bool clockwise) {
    if (index == 0) {
        if (clockwise) {
            tap_code(KC_MS_LEFT);
        } else {
            tap_code(KC_MS_RIGHT);
        }
    }
    else if (index == 1) {
        if (clockwise) {
            tap_code(KC_MS_U);
        } else {
            tap_code(KC_MS_D);
        }
    }
}
bool process_record_user(uint16_t keycode, keyrecord_t *record) {
  switch (keycode) {               // This will do most of the grunt work with the keycodes.
    case ALT_TAB:
      if (record->event.pressed) {
        if (!is_alt_tab_active) {
          is_alt_tab_active = true;
          register_code(KC_LALT);
        }
        alt_tab_timer = timer_read();
        register_code(KC_TAB);
      } else {
        unregister_code(KC_TAB);
      }
      break;
  }
  return true;
}

void matrix_scan_user(void) {     // The very important timer.
  if (is_alt_tab_active) {
    if (timer_elapsed(alt_tab_timer) > 1000) {
      unregister_code(KC_LALT);
      is_alt_tab_active = false;
    }
  }
}