Use of optionmenu's

["Aslak Johansen"<cornersite crosswinds net>]

Subject: Use of optionmenu's

	Hi ...
I am trying to figure out how to see which option is selected in an gtk_option_menu.
There must be a simple way to do so!
Lets take an example:


"

/* gtk3.c */
#include <gtk/gtk.h>
#include <stdio.h>

GtkWidget *window;
GtkWidget *box;
GtkWidget *quitbutton, *button;
GtkWidget *omenu, *menu;
GtkWidget *radiobox;
GSList *radiogroup = NULL;
GtkWidget *menuitem1, *menuitem2, *menuitem3;

gint destroyapp (GtkWidget *widget, gpointer gdata) {
  g_print ("Quitting ...\n");
  gtk_main_quit ();
  return (FALSE);
}

void checkfunc (GtkWidget *widget, gpointer gdata) {
  /* I know this don't work; What I don't know is how to make it work! */
  /* The idea is to let the program output the state of omenu. */
  if (GTK_TOGGLE_BUTTON (menuitem1)->active) {
    printf ("  menuitem1 is selected!\n\n");
  }
  if (GTK_TOGGLE_BUTTON (menuitem2)->active) {
    printf ("  menuitem2 is selected!\n\n");
  }
  if (GTK_TOGGLE_BUTTON (menuitem3)->active) {
    printf ("  menuitem3 is selected!\n\n");
  }
}


int main (int argc, char *argv[]) {
  gtk_init (&argc, &argv);
  g_print ("Starting gtk3 test app ...\n\n");

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window), "test app3!");
  gtk_signal_connect (GTK_OBJECT (window), "delete_event",
		      GTK_SIGNAL_FUNC (destroyapp), NULL);
  gtk_container_border_width (GTK_CONTAINER (window), 10);

  box = gtk_hbox_new (FALSE, 0);
  gtk_container_add (GTK_CONTAINER (window), box);
  gtk_widget_show (box);

  quitbutton = gtk_button_new_with_label ("Quit");
  gtk_box_pack_start (GTK_BOX (box), quitbutton, FALSE, FALSE, 0);
  gtk_signal_connect (GTK_OBJECT (quitbutton), "clicked",
		      GTK_SIGNAL_FUNC (destroyapp), NULL);
  gtk_widget_show (quitbutton);


  omenu = gtk_option_menu_new ();
  gtk_box_pack_start (GTK_BOX (box), omenu, FALSE, FALSE, 0);
  menu = gtk_menu_new ();

  radiobox = gtk_vbox_new (FALSE, 0);
  gtk_box_pack_start (GTK_BOX (box), radiobox, FALSE, FALSE, 0);
  gtk_widget_show (radiobox);

  menuitem1 = gtk_radio_menu_item_new_with_label (radiogroup, "menuitem1");

  radiogroup = gtk_radio_menu_item_group (GTK_RADIO_MENU_ITEM (menuitem1));

  gtk_menu_append (GTK_MENU (menu), menuitem1);
  gtk_widget_show (menuitem1);

  menuitem2 = gtk_radio_menu_item_new_with_label (radiogroup, "menuitem2");

  radiogroup = gtk_radio_menu_item_group (GTK_RADIO_MENU_ITEM (menuitem2));

  gtk_menu_append (GTK_MENU (menu), menuitem2);
  gtk_widget_show (menuitem2);

  menuitem3 = gtk_radio_menu_item_new_with_label (radiogroup, "menuitem3");

  radiogroup = gtk_radio_menu_item_group (GTK_RADIO_MENU_ITEM (menuitem3));

  gtk_menu_append (GTK_MENU (menu), menuitem3);
  gtk_widget_show (menuitem3);

  gtk_option_menu_set_menu (GTK_OPTION_MENU (omenu), menu);
  gtk_widget_show (omenu);


  button = gtk_button_new_with_label ("Start");
  gtk_box_pack_start (GTK_BOX (box), button, FALSE, FALSE, 0);
  gtk_signal_connect (GTK_OBJECT (button), "clicked",
		      GTK_SIGNAL_FUNC (checkfunc), NULL);
  gtk_widget_show (button);

  gtk_widget_show (window);
  gtk_main ();
  return 0;
}

"


Can anybody help me? I have looked in the GTK tutorial (http://www.gtk.org/tutorial/)
and Eric Harlow's "Developing Linux Applications", so I'm a bit out of resources
for this question!

Many thanks, 
		Aslak

cornersite@crosswinds.net
http://www.crosswinds.net/denmark/~cornersite/