static void stereoswap_cb(Fl_Widget *w, void *v) {
  Fl_Menu_ *m = (Fl_Menu_ *)w;
  VMDApp *app = (VMDApp *)v;
  if (!strcmp("On", m->text())) {
    app->display_set_stereo_swap(1);
  } else {
    app->display_set_stereo_swap(0);
  }
}
static void backgroundmode_cb(Fl_Widget *w, void *v) {
  Fl_Menu_ *m = (Fl_Menu_ *)w;
  VMDApp *app = (VMDApp *)(w->user_data());
  if (!strcmp("Gradient", m->text())) {
    app->display_set_background_mode(1);
  } else {
    app->display_set_background_mode(0);
  }
}
static void proj_cb(Fl_Widget *w, void *) {
  Fl_Menu_ *m = (Fl_Menu_ *)w;
  VMDApp *app = (VMDApp *)(w->user_data());
  app->display_set_projection(m->text());
}
static void rendermode_cb(Fl_Widget *w, void *v) {
  Fl_Menu_ *m = (Fl_Menu_ *)w;
  VMDApp *app = (VMDApp *)v;
  app->display_set_rendermode(m->text());
}
static void stereo_cb(Fl_Widget *w, void *v) {
  Fl_Menu_ *m = (Fl_Menu_ *)w;
  VMDApp *app = (VMDApp *)v;
  app->display_set_stereo(m->text());
}
static void axes_cb(Fl_Widget *w, void *v) {
  Fl_Menu_ *m = (Fl_Menu_ *)w;
  VMDApp *app = (VMDApp *)v;
  app->axes_set_location(m->text());
}