box-o-sand/curses-practice/menus/menu_userptr.c

#include <curses.h>
#include <menu.h>

#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
#define CTRLD     4

char *choices[] = {
                        "Choice 1",
                        "Choice 2",
                        "Choice 3",
                        "Choice 4",
            "Choice 5",
            "Choice 6",
            "Choice 7",
                        "Exit",
                  };
void func(char *name);

int main()
{    ITEM **my_items;
    int c;
    MENU *my_menu;
        int n_choices, i;
    ITEM *cur_item;

    /* Initialize curses */
    initscr();
    start_color();
        cbreak();
        noecho();
    keypad(stdscr, TRUE);
    init_pair(1, COLOR_RED, COLOR_BLACK);
    init_pair(2, COLOR_GREEN, COLOR_BLACK);
    init_pair(3, COLOR_MAGENTA, COLOR_BLACK);

    /* Initialize items */
        n_choices = ARRAY_SIZE(choices);
        my_items = (ITEM **)calloc(n_choices + 1, sizeof(ITEM *));
        for(i = 0; i < n_choices; ++i)
    {       my_items[i] = new_item(choices[i], choices[i]);
        /* Set the user pointer */
        set_item_userptr(my_items[i], func);
    }
    my_items[n_choices] = (ITEM *)NULL;

    /* Create menu */
    my_menu = new_menu((ITEM **)my_items);

    /* Post the menu */
    mvprintw(LINES - 3, 0, "Press <ENTER> to see the option selected");
    mvprintw(LINES - 2, 0, "Up and Down arrow keys to naviage (F1 to Exit)");
    post_menu(my_menu);
    refresh();

    while((c = getch()) != KEY_F(1))
    {       switch(c)
            {    case KEY_DOWN:
                menu_driver(my_menu, REQ_DOWN_ITEM);
                break;
            case KEY_UP:
                menu_driver(my_menu, REQ_UP_ITEM);
                break;
            case 10: /* Enter */
            {    ITEM *cur;
                void (*p)(char *);

                cur = current_item(my_menu);
                p = item_userptr(cur);
                p((char *)item_name(cur));
                pos_menu_cursor(my_menu);
                break;
            }
            break;
        }
    }
    unpost_menu(my_menu);
    for(i = 0; i < n_choices; ++i)
        free_item(my_items[i]);
    free_menu(my_menu);
    endwin();
}

void func(char *name)
{    move(20, 0);
    clrtoeol();
    mvprintw(20, 0, "Item selected is : %s", name);
}