Source Code File 11-03_overlay

11-03_overlay.c

#include <ncurses.h>
       
int main()
{   
    WINDOW *red,*blue;
    int x;
    
    initscr();
    refresh();
        
    /* colors */
    start_color();
    init_pair(1,COLOR_WHITE,COLOR_RED);
    init_pair(2,COLOR_WHITE,COLOR_BLUE);

    /* create windows */
    red = newwin(10,24,2,22);
    blue = newwin(10,24,5,32);
    if( red==NULL || blue==NULL)
    {
        endwin();
        puts("Unable to create windows");
        return(1);
    }

    /* color and fill windows */
    wbkgd(red,COLOR_PAIR(1));
    wbkgd(blue,COLOR_PAIR(2));
    for(x=0;x<30;x++)
    {
        waddstr(red,"o e l y ");
        waddstr(blue," r a   v");
    }
    wrefresh(red);
    wrefresh(blue);
    getch();

    /* overlay windows */
    overlay(red,blue);
    wrefresh(blue);
    getch();

    endwin();
    return(0);
}

Output Screenshot

(Click to see result.)

Notes

* The location where the windows overlap is overlayed with the contents of window red appearing in the spaces from window blue. (Click the screenshot above to see the effect.)

← 11-02_overwrite2.c — 11-04_copywin.c →