Gtk2::SimpleMenu - A simple interface to Gtk2's ItemFactory for creating application menus

  use Gtk2 '-init';
  use Gtk2::SimpleMenu;

  my $menu_tree = [
        _File => {
                item_type => '<Branch>',
                children => [
                        _New => {
                                callback => \&new_cb,
                                callback_action => 0,
                                accelerator => '<ctrl>N',
                        },
                        _Save => {
                                callback_action => 1,
                                callback_data => 'per entry cbdata',
                                accelerator => '<ctrl>S',
                        },
                        _Exec => {
                                item_type => '<StockItem>',
                                callback_action => 2,
                                extra_data => 'gtk-execute',
                        },
                        _Quit => {
                                callback => sub { Gtk2->main_quit; },
                                callback_action => 3,
                                accelerator => '<ctrl>Q',
                        },
                ],
        },
        _Mode => {
                _First => {
                        item_type => '<RadioItem>',
                        callback => \&mode_callback,
                        callback_action => 4,
                        groupid => 1,
                }
                _Second => {
                        item_type => '<RadioItem>',
                        callback => \&mode_callback,
                        callback_action => 5,
                        groupid => 1,
                }
                _Third => {
                        item_type => '<RadioItem>',
                        callback => \&mode_callback,
                        callback_action => 6,
                        groupid => 1,
                }
        }
        _Help => {
                children => [
                        _Tearoff => {
                                item_type => '<Tearoff>',
                        },
                        _CheckItem => {
                                item_type => '<CheckItem>',
                                callback_action => 7,
                        },
                        Separator => {
                                item_type => '<Separator>',
                        },
                        _Contents => {
                                callback_action => 8, 
                        },
                        _About => {
                                callback_action => 9, 
                        },
                ]
        }
  ];

  my $menu = Gtk2::SimpleMenu->new (
                menu_tree => $menu_tree,
                default_callback => \&default_callback,
                user_data => 'user_data',
        );

  # an example of how to get to the menuitems.
  $menu->get_widget('/File/Save')->activate;

  $container->add ($menu->{widget});

SimpleMenu is an interface for creating application menubars in as simple a manner as possible. Its main benifit is that the menu is specified as a tree, which is the natural representation of such a menu.

SimpleMenu aims to simplify the design and management of a complex application menu bar by allowing the structure to be specified as a multi-rooted tree. Much the same functionality is provided by Gtk2::ItemFactory, but the data provided as input is a 1-D array and the hierarchy of the menu is controled entierly by the path componenets. This is not ideal when languages such as perl provide for simple nested data structures.

Another advantage of the SimpleMenu widget is that it simplifies the creation and use of accelerators.

SimpleMenu is a child of Gtk2::ItemFactory, so that it may be treated as such. Any method that can be called on a ItemFactory can be called on a SimpleMenu.

 Glib::Object
 +--- Gtk2::Object
      +--- Gtk2::ItemFactory
           +--- Gtk2::SimpleMenu

Creates a new Gtk2::SimpleMenu object with the specified tree. Optionally key value paris providing a default_callback and user_data can be provided as well. After creating the menu object all of the subsequent widgets will have been created and are ready for use.

$menu->{widget}

The Gtk2::MenuBar root of the SimpleMenu. This is what should be added to the widget which will contain the SimpleMenu.

  $container->add ($menu->{widget});

$menu->{accel_group}

The Gtk2::AccellGroup created by the menu tree. Normally accell_group would be added to the main window of an application, but this is only necessary if accelerators are being used in the menu tree's items.

  $win->add_accel_group ($menu->{accel_group});

Perl(1), Glib(3pm), Gtk2(3pm), examples/simple_menu.pl.

 Ross McFarland <rwmcfa1 at neces dot com>

Copyright 2003 by the Gtk2-Perl team.

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details.

You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 USA.