ncurses
=======

	% sudo apt-get install libncurses5-dev ncurses-examples ncurses-doc

http://tldp.org/HOWTO/NCURSES-Programming-HOWTO/

```
#include <ncurses.h>

int main()
{
    initscr();                 /* Initialize term in curses mode & create 'stdscr'. */
    cbreak();                  /* Turn off line buffering. See below. */
    keypad(stdscr, TRUE);      /* Read arrow keys, etc. See below. */
    noecho();                  /* Don't echo() while we getch. See below. */
    printw("Hello World !!!"); /* Print to stdscr. */
    refresh();                 /* Copy from stdscr to the real screen */
    getch();                   /* Wait for user input. */
    endwin();                  /* End curses mode. */

    return 0;
}
```

Turn off the normal buffering of terminal input that happens before the user hits ENTER with either `raw` or `cbreak`.
`raw` lets us handle interrupts like Ctrl-Z and Ctrl-C, while `cbreak` passes them through to act as they normally do.

Turn off the normal echoing of typed characters to the terminal with `noecho`.

`keypad` reads arrow keys and function keys like F1, etc.

## Windows ##

`initscr` creates the default window 'stdscr', but we can create additional windows. When manipulating windows besides stdscr, use different function, typically ones that end in 'w'.

```
printw("Hi There !!!");
refresh();

wprintw(win, "Hi There !!!");
wrefresh(win);

printw(string);  /* Print on stdscr at present cursor position */
mvprintw(y, x, string); /* Move to (y, x) then print string */
wprintw(win, string); /* Print on window win at present cursor position */
mvwprintw(win, y, x, string); /* Move and print to (y, x) relative to window */
```