#include <ctype.h>
#include <curses.h>
#include <cstring>
#include <stdlib.h>
#include <stdio.h>
int Key;

//c++ CursesExample.cpp -lcurses -ocurses
//OR
//c++ CursesExample.cpp -lncurses -ocurses
//./curses

WINDOW *create_newwin(int height, int width, int posy, int posx);
void destroy_window(WINDOW *local_win);
void print_middle(WINDOW *win, char *string);


int main() {

 int Kp = 0; //P
 int Ti = 0; //I
 int Td = 0; //D
 int posx, posy;
 int height, width;
 WINDOW *menu_window;
 char str[10];

 initscr();
 noecho();
 //raw();
 //keypad(stscr, TRUE);
 curs_set(0);
 timeout(0);

 height = 10;
 width = 40;
 posx = (COLS - width)/2;
 posy = (LINES - height)/2;


 mvprintw( 9,10, "Select one of the following");
 mvprintw(10,10, "--------------------------------------------");
 mvprintw(11,10, "1. P to change Kp");
 mvprintw(12,10, "2. I to change Ti");
 mvprintw(13,10, "3. D to change Td");
 mvprintw(14,10, "4. N to change derivative filter");
 mvprintw(15,10, "5. S to change setpoint signal s(t)");
 mvprintw(16,10, "---------------------------------------------");

 mvprintw(18,10, "6. Q to Quit program");

 while((Key = toupper(getch()))!= 'Q') {
  switch(Key) {
    case 'p' : case 'P' :
      menu_window = create_newwin(height, width, posy, posx);
      //*string = ;
      print_middle(menu_window, "Enter value of Kp");
      timeout(5000);
      getstr(str);
      Kp = atoi(str);
      print_middle(menu_window, "                  ");
      //print_middle(menu_window, "Kp set to: %d", Kp);
      timeout(0);
      destroy_window(menu_window);
      refresh();
      //wrefresh(stdscr);
      break;
    default :
      timeout(0);
  }
 }
  curs_set(1);
  endwin();
  return 0;
}

WINDOW *create_newwin(int height, int width, int posy, int posx) {
  WINDOW *local_win;
  local_win = newwin(height, width, posy, posx);
  box(local_win, 0, 0);
  wrefresh(local_win);
  return local_win;
}
void destroy_window(WINDOW *local_win) {
  wborder(local_win, '|', '|', '-','-','+','+','+','+');
  wrefresh(local_win);
  delwin(local_win);
}
void print_middle(WINDOW *win, char *string) {
 int length, x, y;
 int width, height;


 getmaxyx(win, height, width);

 length = strlen(string);
 x = (int)(width - length) /2.0;
 y = height/2;

 mvwprintw(win, y, x, "%s", string);
 wrefresh(win);
}