monotux.tech

QMK: shift + backspace = delete

• QMK, keyboards

This is a neat trick I’ve incorporated into all my QMK based keyboards – pressing shift and backspace makes backspace act like the delete key. It’s probably not the most exciting trick out there – but it’s just so practical!

It’s also stolen from an excellent guide on QMK, so credit where credit is due – thank you Pascal!

The snippet below enables the feature:

bool process_record_user(uint16_t keycode, keyrecord_t* record) {
  switch (keycode) {
    case KC_BSPC: {
      static uint16_t registered_key = KC_NO;
      if (record->event.pressed) {  // On key press.
        const uint8_t mods = get_mods();
#ifndef NO_ACTION_ONESHOT
        uint8_t shift_mods = (mods | get_oneshot_mods()) & MOD_MASK_SHIFT;
#else
        uint8_t shift_mods = mods & MOD_MASK_SHIFT;
#endif  // NO_ACTION_ONESHOT
        if (shift_mods) {  // At least one shift key is held.
          registered_key = KC_DEL;
          // If one shift is held, clear it from the mods. But if both
          // shifts are held, leave as is to send Shift + Del.
          if (shift_mods != MOD_MASK_SHIFT) {
#ifndef NO_ACTION_ONESHOT
            del_oneshot_mods(MOD_MASK_SHIFT);
#endif  // NO_ACTION_ONESHOT
            unregister_mods(MOD_MASK_SHIFT);
          }
        } else {
          registered_key = KC_BSPC;
        }

        register_code(registered_key);
        set_mods(mods);
      } else {  // On key release.
        unregister_code(registered_key);
      }
    } return false;

    // Other macros...
  }

  return true;
}

You can read more about this trick in the guide.