Warning: ImageMenuItem is deprecated since 3.10.
A GtkImageMenuItem is a menu item which has an icon next to the text label.
This is functionally equivalent to:
GtkWidget *box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
GtkWidget *icon = gtk_image_new_from_icon_name ("folder-music-symbolic", GTK_ICON_SIZE_MENU);
GtkWidget *label = gtk_label_new ("Music");
GtkWidget *menu_item = gtk_menu_item_new ();
gtk_container_add (GTK_CONTAINER (box), icon);
gtk_container_add (GTK_CONTAINER (box), label);
gtk_container_add (GTK_CONTAINER (menu_item), box);
gtk_widget_show_all (menu_item);
Note that the user may disable display of menu icons using the gtk_menu_images setting, so make sure to still fill in the text label. If you want to ensure that your menu items show an icon you are strongly encouraged to use a MenuItem with a Image instead.
ImageMenuItem has been deprecated since GTK+ 3.10. If you want to display an icon in a menu item, you should use MenuItem and pack a Box with a Image and a Label instead. You should also consider using Builder and the XML Menu description for creating menus, by following the [GMenu guide][https://developer.gnome.org/GMenu/]. You should consider using icons in menu items only sparingly, and for "objects" (or "nouns") elements only, like bookmarks, files, and links; "actions" (or "verbs") should not have icons.
Furthermore, if you would like to display keyboard accelerator, you must pack the accel label into the box using pack_end and align the label, otherwise the accelerator will not display correctly. The following code snippet adds a keyboard accelerator to the menu item, with a key binding of Ctrl+M:
GtkWidget *box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
GtkWidget *icon = gtk_image_new_from_icon_name ("folder-music-symbolic", GTK_ICON_SIZE_MENU);
GtkWidget *label = gtk_accel_label_new ("Music");
GtkWidget *menu_item = gtk_menu_item_new ();
GtkAccelGroup *accel_group = gtk_accel_group_new ();
gtk_container_add (GTK_CONTAINER (box), icon);
gtk_label_set_use_underline (GTK_LABEL (label), TRUE);
gtk_label_set_xalign (GTK_LABEL (label), 0.0);
gtk_widget_add_accelerator (menu_item, "activate", accel_group,
GDK_KEY_m, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
gtk_accel_label_set_accel_widget (GTK_ACCEL_LABEL (label), menu_item);
gtk_box_pack_end (GTK_BOX (box), label, TRUE, TRUE, 0);
gtk_container_add (GTK_CONTAINER (menu_item), box);
gtk_widget_show_all (menu_item);