#include <U8g2lib.h>
#include <Wire.h>
#include "Button.h"
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE);

Button Button_1(13);
Button Button_2(12);
Button Button_3(11);

String cuan[3];

void setup() {

  cuan[0] = "123";
  cuan[1] = "456";
  cuan[2] = "789";

  Button_1.begin();
  Button_1.set_repeat(500, 200);
  Button_2.begin();
  Button_2.set_repeat(500, 200);
  Button_3.begin();
  Button_3.set_repeat(500, 200);
  u8g2.setI2CAddress(0x3C * 2);
  u8g2.begin();
  u8g2.enableUTF8Print();

}
int page_num = 0;
void loop() {
  if (Button_1.pressed()) {
    if(page_num>=3) page_num= 0;
    page_num++;
    
  }
  if (Button_2.pressed()) {
    page_num = 2;
  }
  if (Button_3.pressed()) {
   page_num = 3;
  }
  u8g2.firstPage();
  do
  {
    page1(page_num);
  } while (u8g2.nextPage());

}

void page1(int num) {
  u8g2.setFont(u8g2_font_timR12_tf);
  u8g2.setFontPosTop();
  u8g2.setCursor(0, 00);
  u8g2.print(cuan[0]);
  u8g2.setCursor(0, 20);
  u8g2.print(cuan[1]);
  u8g2.setCursor(0, 40);
  u8g2.print(cuan[2]);
  if (num == 1) {
    u8g2.setFont(u8g2_font_timB14_tf);
    u8g2.setFontPosTop();
    u8g2.setCursor(0, 00);
    u8g2.print(cuan[num-1]);
  } else if (num == 2) {
    u8g2.setFont(u8g2_font_timB14_tf);
    u8g2.setFontPosTop();
    u8g2.setCursor(0, 20);
    u8g2.print(cuan[num-1]);
  } else if (num == 3) {
    u8g2.setFont(u8g2_font_timB14_tf);
    u8g2.setFontPosTop();
    u8g2.setCursor(0, 40);
    u8g2.print(cuan[num-1]);
  }

  

}