mousePan method doesn't work.

[yokotomomo]

I want to scroll horizontally with the mouse.
BLEHidAdafruit
In the above example, the methoderr_t mousePan(int8_t pan);does not work.
Is there any solution?

Below is my Sketch.

//ISP1807_MB_4x3_BLE.ino
#include <bluefruit.h>
BLEDis bledis;
BLEHidAdafruit blehid;
// 左側スイッチのピン接続番号
#define SWITCH_UP  9
#define SWITCH_DOWN  7
#define SWITCH_LEFT  5
#define SWITCH_RIGHT  8
#define SWITCH_PUSH  6
// スイッチの状態
#define OFF 1
#define ON  0

uint8_t Ub = OFF;
uint8_t Lb = OFF;
uint8_t Db = OFF;
uint8_t Rb = OFF;
uint8_t Pb = OFF;

static const uint8_t LED_D10 = 10;  // 外付けLED
#define MOVE_STEP    10

void led_notify(uint16_t handle, uint8_t _led_state) {
  digitalWrite(LED_D10, (_led_state & KEYBOARD_LED_CAPSLOCK) != KEYBOARD_LED_CAPSLOCK);
}
void start_advertising() {
  // Advertising packet
  Bluefruit.Advertising.addFlags(BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE);
  Bluefruit.Advertising.addTxPower();
  Bluefruit.Advertising.addAppearance(BLE_APPEARANCE_HID_KEYBOARD);
  
  Bluefruit.Advertising.addService(blehid);
  Bluefruit.Advertising.addName();
  Bluefruit.Advertising.restartOnDisconnect(true);
  Bluefruit.Advertising.setInterval(32, 244);    // in unit of 0.625 ms
  Bluefruit.Advertising.setFastTimeout(30);      // number of seconds in fast mode
  Bluefruit.Advertising.start(0);  
                // 0 = Don't stop advertising after n seconds
}
 
void setup() {
  pinMode(SWITCH_UP, INPUT_PULLUP);
  pinMode(SWITCH_LEFT, INPUT_PULLUP);
  pinMode(SWITCH_DOWN, INPUT_PULLUP);
  pinMode(SWITCH_RIGHT, INPUT_PULLUP);
  pinMode(SWITCH_PUSH, INPUT_PULLUP);
 
  pinMode(LED_D10, OUTPUT);
  digitalWrite(LED_D10, HIGH);
  Bluefruit.begin();
  Bluefruit.Periph.setConnInterval(9, 16);
  Bluefruit.setTxPower(4);    // Check bluefruit.h for supported values
  Bluefruit.setName("ISP1807_MB_4x3_BLE");
  // Configure and Start Device Information Service.
  bledis.setManufacturer("unknown");
  bledis.setModel("ISP1807_MB_4x3_BLE");
  bledis.begin();
  blehid.begin();
  blehid.setKeyboardLedCallback(led_notify);
  start_advertising();
}
 
void loop() {

  uint8_t Ua;
  uint8_t La;
  uint8_t Da;
  uint8_t Ra;
  uint8_t Pa;
  // 左スイッチ状態を読み取る
  Ua = digitalRead(SWITCH_UP);
  La = digitalRead(SWITCH_LEFT);
  Da = digitalRead(SWITCH_DOWN);
  Ra = digitalRead(SWITCH_RIGHT);
  Pa = digitalRead(SWITCH_PUSH);

  // スイッチ状態が、前回OFF、今回ONの時、スイッチが押されたと判断する
  if( Ub == OFF && Ua == ON || Ub == ON && Ua == OFF){
    Serial.println("UP");
    blehid.mouseScroll(5);
  }
  if( Db == OFF && Da == ON || Db == ON && Da == OFF){
    Serial.println("Down");
    blehid.mouseScroll(-5);
  }
  if( Lb == OFF && La == ON || Lb == ON && La == OFF){
    Serial.println("Left");
    blehid.mousePan(10);
  }
    if( Rb == OFF && Ra == ON || Rb == ON && Ra == OFF){
    Serial.println("Right");
    blehid.mousePan(-10);
  }
    if( Pb == OFF && Pa == ON){
    Serial.println("Push");
  }

  Ub = Ua;
  Lb = La;
  Db = Da;
  Rb = Ra;
  Pb = Pa;
}