//#include <Adafruit_SSD1306.h> // v2.5.1
#include <EasyButton.h>  // v.2.0.1
//#include <ArduinoSort.h>
//#include <EEPROM.h>  // v.2.0.0

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define SCREEN_ADDR 0x3C /// <- 0x3C for 128x32 ; 0x3D for 128x64 
//Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT);

//...
#define xyz
//...

// Event Types
#define ET_NONE 0
#define ET_BACK 1
#define ET_SELECT 2
#define ET_LEFT 3
#define ET_RIGHT 4
#define ET_PAGELEFT 5
#define ET_PAGERIGHT 6
byte evtType = ET_NONE;

#define BTN_LEFT_PIN  7
#define BTN_RIGHT_PIN 5
#define BTN_ENTER_PIN 6

char *tags[] = {
  "NONE",  // 0
  "BACK",  // 1
  "SELECT", // 2
  "LEFT", // 3
  "RIGHT", // 4
  "PAGELEFT", // 5
  "PAGERIGHT", // 6
};

#define LONG_TRIGGER 250

// Button Instances
EasyButton btnLeft(BTN_LEFT_PIN); // EasyButton btnLeft(int BTN_LEFT_PIN, uint32 debounce, bool pullup, invert);
EasyButton btnRight(BTN_RIGHT_PIN);
EasyButton btnEnter(BTN_ENTER_PIN);

// Button Callbacks
//
void onBtnLeftPressed() {
  evtType = ET_LEFT;
}

void onBtnRightPressed() {
  evtType = ET_RIGHT;
}

void onBtnLeftLongPressed() {
  evtType = ET_PAGELEFT;
}

void onBtnRightLongPressed() {
  evtType = ET_PAGERIGHT;
}

void onBtnEnterPressed() {
  evtType = ET_SELECT;
}

void onBtnEnterLongPressed() {
  evtType = ET_BACK;
}

void setup(){
  Serial.begin(115200); Serial.println("does not!");

//  display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDR); //0x3C);  // initialize with the I2C addr 0x3D (for the 128x64)

//  display.clearDisplay();
//  display.display();

/*  ...
  display cmds
  ...
*/
  // INIT Buttons !!!
  btnLeft.begin();
  btnRight.begin();
  btnEnter.begin();

  // SETUP
  btnLeft.onPressed(onBtnLeftPressed);
  btnLeft.onPressedFor(LONG_TRIGGER, onBtnLeftLongPressed);
  btnRight.onPressed(onBtnRightPressed);
  btnRight.onPressedFor(LONG_TRIGGER, onBtnRightLongPressed);

  btnEnter.onPressed(onBtnEnterPressed);
  btnEnter.onPressedFor(LONG_TRIGGER, onBtnEnterLongPressed);
}


void loop() {

  btnLeft.read();
  btnRight.read();
  btnEnter.read();

  if (evtType!=ET_NONE) processEvent();

}

void processEvent(){
  // dispatch actions based on EventType
//  ...
  static int coubter;

  Serial.print("event # ");
  Serial.print(coubter); 
  Serial.print(" = "); 
  Serial.println(tags[evtType]);

  coubter++;
   
  // resolve action/event
  evtType = ET_NONE;
}