/*
 *  Radio
 *  -----
 *  This program demonstates the use of radio buttons.
 *
 *  Radio buttons are similar to checkboxes, except that they are
 *  used to signify mutually exclusive options.
 *
 *  The radio button call-back function is called whenever a change
 *  occurs.
 */

#include <graphapp.h>

radiobutton tomato, barbeque;

void place_order(button b)
{
    printf("Sauce:\n");
    if (ischecked(tomato))     printf("  Tomato\n");
    if (ischecked(barbeque))   printf("  Barbeque\n");
    exitapp();
}

void choose(radiobutton sauce)
{
    if (sauce == tomato)         printf("Love tomato sauce!\n");
    else if (sauce == barbeque)  printf("Hmm, hmm, BBQ sauce.\n");
}

void main(void)
{
    window w;
    rect r;

    w = newwindow("Pizza", rect(0,0,200,180), StandardWindow);
    r = rect(10,10,100,30);

    tomato   = newradiobutton("Tomato", r, choose); r.y += 35;
    barbeque = newradiobutton("BBQ", r, choose);    r.y += 35;

    check(tomato);
    newbutton("Order Pizza", r, place_order);

    show(w);
    mainloop();
}