NCurses function key modifiers Alt and Ctrl in a Windows console

[oldfaber]

Hi,

I use ncurses and pdcurses (pdcurses 3.9 self compiled with TDM mingw64 10.3.0) 
for my development
environment under Windows 10, mainly for a modified version of my console 
favorite text editors
(nano, fte) and other TUI programs.

I found that the ncurses mingw-w64 version 6.5 (and older versions) of the 
library and DLL,
downloaded from
https://invisible-island.net/datafiles/release/mingw64.zip
does not report the Ctrl and Alt modifier for the F1-F12 keys.

Ctrl and Alt modifiers with PDcurses and ncurses under native linux are ok,
but are not reported on a Windows console.
The small example below compiled and run with mingw64 gcc in a up to date 
Windows 10 console,
with TERM not set, does not report the modifiers.

Best regards
Fabio


------------
// test key codes

#include <stdio.h>
#include <string.h>
#include <ncurses.h>

static void print_help(WINDOW *menu_win)
{
        static const char helptext[] = "Press a key. Press F10 to exit";

        box(menu_win, 0, 0);
        mvwprintw(menu_win, 1, 1, "%s", helptext);
        wrefresh(menu_win);
}

int main()
{
        WINDOW *menu_win;
        int byebye = 0;
        int c;

        initscr();
        start_color();
        clear();
        noecho();
        cbreak();

        init_pair(8, COLOR_RED, COLOR_BLACK);
        menu_win = newwin(3, 40, 1, 1);
        keypad(menu_win, TRUE);
        print_help(menu_win);
        while (1) {
                const char *kname;
                int fk;
                const char *mod;

                c = wgetch(menu_win);
                switch (c) {
                case KEY_F(10):
                        byebye = 1;
                        break;
                default:
                        kname = keyname(c);
                        // fk in 0..11
                        if (c >= KEY_F(1) && c <= KEY_F(12)) {
                                fk = (c - KEY_F(1));
                                mod = "none  ";
                        } else if (c >= KEY_F(13) && c <= KEY_F(24)) {
                                fk = (c - KEY_F(1)) - 12;
                                mod = "shift ";
                        } else if (c >= KEY_F(25) && c <= KEY_F(36)) {
                                fk = (c - KEY_F(1)) - 24;
                                mod = "ctrl  ";
                        } else if (c >= KEY_F(37) && c <= KEY_F(48)) {
                                fk = (c - KEY_F(1)) - 36;
                                mod = "sh+ct ";
                        } else if (c >= KEY_F(49) && c <= KEY_F(60)) {
                                fk = (c - KEY_F(1)) - 48;
                                mod = "alt   ";

                        } else {
                                fk = -1;
                                mod = "       ";
                        }
                        mvprintw(8, 0, "Character pressed is = %3d (%#x) (%#o) %-8s", c, 
c, c, kname ? kname : "---      ");
                        if (fk >= 0)
                                mvprintw(9, 0, "Function key F%d mod=%s", fk + 
1, mod);
                        refresh();
                        break;
                }
                print_help(menu_win);
                if (byebye == 1)
                        break;
        }
        endwin();
        return 0;
}