#include <LiquidCrystal_I2C.h> //ประกาศ Library ของจอ I2C
LiquidCrystal_I2C lcd (0x27, 20, 4);   //จอใหญ่

const byte BUTTON_SET = A0;
const byte BUTTON_UP = A1;
const byte BUTTON_DW = A2;
const byte BUTTON_CANCEL = A3;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  lcd.begin();
  pinMode(BUTTON_SET, INPUT_PULLUP);
  pinMode(BUTTON_UP, INPUT_PULLUP);
  pinMode(BUTTON_DW, INPUT_PULLUP);
  pinMode(BUTTON_CANCEL, INPUT_PULLUP);

}

void loop() {
  // put your main code here, to run repeatedly:
  static boolean Display = true;
  static boolean ButtonSet = false;
  if(Display == true){
    Display = false;
    lcd.setCursor(0,0);
    lcd.print("TAWEECHOK");
    lcd.setCursor(0,1);
    lcd.print("KOARAM");
   }

   if(digitalRead(BUTTON_SET)==0){
     delay(1);
   if(digitalRead(BUTTON_SET)==0){
     if(ButtonSet==false){
       ButtonSet=true;
       SelectMenu();
       Display = true;
     }
   }
   }else{ButtonSet = false;

   }
   

}
void SelectMenu (void)
{
  boolean Display = true;
  boolean Exit = false;
  boolean ButtonSet = false;
  boolean ButtonUp = false;
  boolean ButtonDown = false;
   boolean ButtonCancel = false;
 byte Menu = 0;
   const char MenuText[4] [17] = {" 1: Menu1    ",
                                  " 2: Menu2    ",
                                  " 3: Menu3    ",
                                  " 4: Menu4    " };
   while(Exit==false){
     if(Display == true){
       Display = false;
       lcd.setCursor(0,0);
       lcd.print("Select Menu 1-4");
       lcd.setCursor(0,1);
       lcd.print(MenuText[Menu]);
     }
     ////////////เขียนปุ่มกด (BUTTON_SET ///////////////////
     if(digitalRead(BUTTON_SET)==0){
       delay(1);
       if(digitalRead(BUTTON_SET)==0){
         if(ButtonSet==false){
           ButtonSet=true;
           switch(Menu){
             case 0: Serial.println("You select menu 1"); break;
             case 1: Serial.println("You select menu 2"); break;
             case 2: Serial.println("You select menu 3"); break;
             case 3: Serial.println("You select menu 4"); break;
             ///เวลาจะใช้งานเอาค่าฟังชั่นมาใส่ได้เลย/////////////////
           }
         }
       }
     }else{
       ButtonSet=false;

     }

///////////////////////////////////////////////////////////////////////
     if(digitalRead(BUTTON_UP)==0){
       delay(1);
       if(digitalRead(BUTTON_UP)==0){
         if(ButtonUp==false){
           ButtonUp=true;
           if(Menu<3){
             Menu++;
           }else{   //ถ้าไม่ใช่น้อยกว่า3
             Menu=3;
           }
            Display = true;
         }
       
       }
     }else{
       ButtonUp=false;
    }
////////////////////////////////////////////////////////////////////////////////////////
     if(digitalRead(BUTTON_DW)==0){
       delay(1);
       if(digitalRead(BUTTON_DW)==0){
         if(ButtonDown==false){
           ButtonDown=true;
           if(Menu>0){
             Menu--;
           }else{   //ถ้าไม่ใช่ให้เป็นเมนูที่3
             Menu=3;
           }
            Display = true;
         }
       
       }
     }else{
       ButtonDown=false;

     }
     //////////////////////////////////////////////////
        if(digitalRead(BUTTON_CANCEL)==0){
       delay(1);
       if(digitalRead(BUTTON_CANCEL)==0){
         if(ButtonCancel==false){
           ButtonCancel=true;
           Exit = true; //ถ้าเป็น true จะออกจากเมนูนี้//
         }
       
       }
     }else{
       ButtonCancel=false;

     }
   }                               

}