Source Code File 09-11_quadborders

09-11_quadborders.c

#include <ncurses.h>
   
int main()
{
    WINDOW *a,*b,*c,*d;
    int maxx,maxy,halfx,halfy;
    
    /* initialize stuff */
    initscr();
    refresh();
    start_color();
    init_pair(1,COLOR_BLACK,COLOR_BLUE);
    init_pair(2,COLOR_BLACK,COLOR_RED);
    init_pair(3,COLOR_BLACK,COLOR_GREEN);
    init_pair(4,COLOR_BLACK,COLOR_CYAN);

    /* calculate window sizes and locations */
    getmaxyx(stdscr,maxy,maxx);
    halfx = maxx >> 1;
    halfy = maxy >> 1;

    /* create four quarter windows */
    a = newwin(halfy,halfx,0,0);
    b = newwin(halfy,halfx,0,halfx);
    c = newwin(halfy,halfx,halfy,0);
    d = newwin(halfy,halfx,halfy,halfx);
    if( a==NULL || b==NULL || c==NULL || d==NULL)
    {
        endwin();
        puts("Some kind of error creating the windows");
        return 1;
    }

    /* Write to each window */
    /* Don't forget to remove the newlines!
        and offset the text */
    wbkgd(a,COLOR_PAIR(1));
    box(a,0,0);
    mvwaddstr(a,1,1,"This is window A");
    wbkgd(b,COLOR_PAIR(2));
    box(b,0,0);
    mvwaddstr(b,1,1,"This is window B");
    wbkgd(c,COLOR_PAIR(3));
    box(c,0,0);
    mvwaddstr(c,1,1,"This is window C");
    wbkgd(d,COLOR_PAIR(4));
    box(d,0,0);
    mvwaddstr(d,1,1,"This is window D");
    /* update the windows */
    wrefresh(a);
    wrefresh(b);
    wrefresh(c);
    wrefresh(d);
    /* pause */
    getch();

    endwin();
    return 0;
}

Output Screenshot

Notes

* This code is based on the original four-window program, 09-06_quad.c.

* Pay heed to the comment at Lines 35 and 36. It describes the key difference between this code and the earlier four-window program.

* I used the box() function due to its simplicity over border().

* Especially with a presentation this complex, I would create subwindows to plot the text withing the four windows. That way, the border remains intact. I didn't do so here because the code is long enough already.

← 09-10_box.c —10-01_sub1.c→