gtk/examples/menu/itemfactory.c

/* example-start menu itemfactory.c */

#include <gtk/gtk.h>
#include <strings.h>

/* Obligatory basic callback */
static void print_hello(GtkWidget *w, gpointer data) {
  g_message("Hello, World!\n");
}

/* This is the GtkItemFactoryEntry structure used to generate new menus.
   Item 1: The menu path. The letter after the underscore indicates an
           accelerator key once the menu is open.
   Item 2: The accelerator key for the entry
   Item 3: The callback function.
   Item 4: The callback action.  This changes the parameters with
           which the function is called.  The default is 0.
   Item 5: The item type, used to define what kind of an item it is.
           Here are the possible values:

           NULL               -> "<Item>"
           ""                 -> "<Item>"
           "<Title>"          -> create a title item
           "<Item>"           -> create a simple item
           "<CheckItem>"      -> create a check item
           "<ToggleItem>"     -> create a toggle item
           "<RadioItem>"      -> create a radio item
           <path>             -> path of a radio item to link against
           "<Separator>"      -> create a separator
           "<Branch>"         -> create an item to hold sub items
           "<LastBranch>"     -> create a right justified branch 
*/

static GtkItemFactoryEntry menu_items[] = {
  {"/_File",         NULL,         NULL, 0, "<Branch>"},
  {"/File/_New",     "<control>N", print_hello, 0, NULL},
  {"/File/_Open",    "<control>O", print_hello, 0, NULL},
  {"/File/_Save",    "<control>S", print_hello, 0, NULL},
  {"/File/Save _As", NULL,         NULL, 0, NULL},
  {"/File/sep1",     NULL,         NULL, 0, "<Separator>"},
  {"/File/Quit",     "<control>Q", gtk_main_quit, 0, NULL},
  {"/_Options",      NULL,         NULL, 0, "<Branch>"},
  {"/Options/Test",  NULL,         NULL, 0, NULL},
  {"/_Help",         NULL,         NULL, 0, "<LastBranch>"},
  {"/_Help/About",   NULL,         NULL, 0, NULL},
};


void get_main_menu(GtkWidget *window, GtkWidget ** menubar) {
  int nmenu_items = sizeof(menu_items) / sizeof(menu_items[0]);
  GtkItemFactory *item_factory;
  GtkAccelGroup *accel_group;

  accel_group = gtk_accel_group_new();

  /* This function initializes the item factory.
     Param 1: The type of menu - can be GTK_TYPE_MENU_BAR, GTK_TYPE_MENU,
              or GTK_TYPE_OPTION_MENU.
     Param 2: The path of the menu.
     Param 3: A pointer to a gtk_accel_group.  The item factory sets up
              the accelerator table while generating menus.
  */

  item_factory = gtk_item_factory_new(GTK_TYPE_MENU_BAR, "<main>", 
				       accel_group);

  /* This function generates the menu items. Pass the item factory,
     the number of items in the array, the array itself, and any
     callback data for the the menu items. */
  gtk_item_factory_create_items(item_factory, nmenu_items, menu_items, NULL);

  /* Attach the new accelerator group to the window. */
  gtk_accel_group_attach (accel_group, GTK_OBJECT (window));

  if (menubar)
    /* Finally, return the actual menu bar created by the item factory. */ 
    *menubar = gtk_item_factory_get_widget(item_factory, "<main>");
}

int main(int argc, char *argv[]) {
  GtkWidget *window;
  GtkWidget *main_vbox;
  GtkWidget *menubar;
  
  gtk_init(&argc, &argv);
  
  window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_signal_connect(GTK_OBJECT(window), "destroy", 
		     GTK_SIGNAL_FUNC(gtk_main_quit), 
		     "WM destroy");
  gtk_window_set_title(GTK_WINDOW(window), "Item Factory");
  gtk_widget_set_usize(GTK_WIDGET(window), 300, 200);
  
  main_vbox = gtk_vbox_new(FALSE, 1);
  gtk_container_border_width(GTK_CONTAINER(main_vbox), 1);
  gtk_container_add(GTK_CONTAINER(window), main_vbox);
  gtk_widget_show(main_vbox);
  
  get_main_menu(window, &menubar);
  gtk_box_pack_start(GTK_BOX(main_vbox), menubar, FALSE, TRUE, 0);
  gtk_widget_show(menubar);
  
  gtk_widget_show(window);
  gtk_main();
  
  return(0);
}
/* example-end */