I'll risk to assume that application cannot properly function without window (and at the same time request screen events).
If you add this minimal init steps to your main():
screen_context_t screen_cxt;
screen_create_context(&screen_cxt, 0);
screen_window_t screen_win;
screen_create_window(&screen_win, screen_cxt);
int rect[4] = { 0, 0, 0, 0 };
screen_buffer_t screen_buf;
screen_create_window_buffers(screen_win, 1);
screen_get_window_property_pv(screen_win, SCREEN_PROPERTY_RENDER_BUFFERS, (void **)&screen_buf);
screen_post_window(screen_win, screen_buf, 1, rect, 0);
screen_flush_context(screen_cxt, SCREEN_WAIT_IDLE);
you'll get NAVIGATOR_EXIT (and other navigator events).
By the way this part also does not look nice:
} else if ((domain == navigator_get_domain())
&& (NAVIGATOR_EXIT == bps_event_get_code(event))) {
exit_application = 1;
}
Add break; after exit_application.
And final remark bps_get_event(&event, 0) will eat your CPU, in this particular example it is better to use bps_get_event(&event, -1))
