#include <windows.h>
#include <stdio.h>
#include <stddef.h>
#include <conio.h>


// ФУНКЦИИ МЕНЮ
void ViewMenu ();
void Move ();
void ViewSubMenu ();
void SubMenu_off ();
void BackLight (int x, int y);
void BackLight_off ();

HANDLE hOut;
COORD coord = {0,0};
CONSOLE_CURSOR_INFO ConCurInf;

int hor_flag=0;
int ver_flag=0;
char* menu[4][5] = {
                      {" List               ",
                       "  View              ",
                       "  Clear             ",
                       NULL
                      },

                      {" Student            ",
                       "  Add               ",
                       "  Delete            ",
                       "  Edit              ",
                       NULL
                      },

                      {" Sort by            ",
                       "  Date              ",
                       "  Name              ",
                       NULL
                      },

                      {" Exit               ",
                       NULL
                      },
                    };


main ()
{
  hOut = GetStdHandle(STD_OUTPUT_HANDLE);
  ConCurInf.dwSize = 10;
  ConCurInf.bVisible = FALSE;
  SetConsoleCursorInfo(hOut,&ConCurInf);
  ViewMenu();
  getch();
}
// MENU*************************************************************************
//******************************************************************************
//******************************************************************************

void ViewMenu ()
{
  int i=0;
  coord.X=0;
  coord.Y=0;
  SetConsoleCursorPosition(hOut,coord);
  SetConsoleTextAttribute (hOut,0x70);
  while (i<4)
  {
    printf("%s",menu[i++][0]);
  }
  Move();
}

void Move ()
{
  char key=0;

  coord.X = 60;coord.Y=0;
  SetConsoleCursorPosition (hOut,coord);

   while (key != 13)
   {
      BackLight (coord.X, coord.Y);
      ViewSubMenu ();
      key = getch();
      switch (key)
      {
       case 0x4d: if (coord.X==60) break;
                  coord.X += 20;
                  coord.Y =0;
                  SetConsoleCursorPosition (hOut, coord); break;
       case 0x4b: if (coord.X==0) break;
                  coord.X -= 20;
                  coord.Y =0;
                  SetConsoleCursorPosition (hOut, coord); break;
       case 0x48: if (coord.Y==0) break;
                  coord.Y --;
                  SetConsoleCursorPosition (hOut, coord); break;
       case 0x50: if (coord.X == 0)
                  if (coord.Y == 2) break;
                  if (coord.X == 20)
                  if (coord.Y == 3) break;
                  if (coord.X == 40)
                  if (coord.Y == 2) break;
                  if (coord.X == 60)
                  if (coord.Y == 0) break;
                  coord.Y ++;
                  SetConsoleCursorPosition (hOut, coord); break;
      }
   }
}

void ViewSubMenu ()
{

  if (coord.Y == 0)
  {
    int tmp = coord.X;
    int i=1;
    SubMenu_off ();
    SetConsoleTextAttribute (hOut, 0x70);
    coord.X = tmp;
    SetConsoleCursorPosition (hOut, coord);
    while (menu[coord.X/20][i])
    {
      coord.Y++;
      SetConsoleCursorPosition (hOut, coord);
      printf("%s",menu[coord.X/20][i++]);
    }
    coord.X =  tmp;
    coord.Y = 0;
    SetConsoleCursorPosition (hOut, coord);
    hor_flag = coord.X;
  }
}

void SubMenu_off ()
{
  int i=1;
  coord.X = hor_flag;
  SetConsoleCursorPosition (hOut, coord);
  SetConsoleTextAttribute (hOut, 0x00);
  while (menu[hor_flag/20][i])
    {
      coord.Y++;
      SetConsoleCursorPosition (hOut, coord);
      printf("%s",menu[hor_flag/20][i++]);
    }
  coord.X = hor_flag;
  coord.Y = 0;
  SetConsoleCursorPosition (hOut, coord);
}


void BackLight (int x, int y)
{
  BackLight_off();
  int tmp=coord.X;
  SetConsoleTextAttribute (hOut, 0x31);
  printf("%s",menu[x/20][y]);
  coord.X =tmp;
  SetConsoleCursorPosition (hOut, coord);
  ver_flag = y;
}

void BackLight_off ()
{
  int tmpx = coord.X;
  int tmp = coord.Y;
  SetConsoleTextAttribute (hOut, 0x70);
  coord.X = hor_flag;
  coord.Y = ver_flag;
  SetConsoleCursorPosition (hOut, coord);
  printf("%s",menu[coord.X/20][coord.Y]);
  coord.X = tmpx; coord.Y = tmp;
  SetConsoleCursorPosition (hOut, coord);
}