Gtk2::Ex::FormFactory::Menu - A Menu in a FormFactory framework

  Gtk2::Ex::FormFactory::Menu->new (
    menu_tree        => Hierarchical definition of the Menu,
    default_callback => Default callback for menu items,
    user_data        => User data for the default callback,
    ...
    Gtk2::Ex::FormFactory::Widget attributes
  );

This class implements a Menu in a Gtk2::Ex::FormFactory framework and pretty much wraps Gtk2::Ex::Simple::Menu. No application object attributes are associated with a Menu as a whole.

But you may associate single Menu entries with an object. This way the correspondent entries will set insensitive automatically if the underlying object is undef and vice versa are activated once the object is defined.

  Gtk2::Ex::FormFactory::Intro

  Gtk2::Ex::FormFactory::Widget
  +--- Gtk2::Ex::FormFactory::Menu

  Gtk2::Ex::FormFactory::Layout
  Gtk2::Ex::FormFactory::Rules
  Gtk2::Ex::FormFactory::Context
  Gtk2::Ex::FormFactory::Proxy

Attributes are handled through the common get_ATTR(), set_ATTR() style accessors, but they are mostly passed once to the object constructor and must not be altered after the associated FormFactory was built.

menu_tree = ARRAYREF [mandatory]

This is a slightly extended menu tree definition in terms of Gtk2::Ex::Simple::Menu. You may optionally associate each entry with an application object by specifying its name with the object key in the item definition hash. This way the item is active only if the correspondent object is defined.

As well you can control widget activity more detailed using the active_cond and active_depends keys as described in the Gtk2::Ex::FormFactory::Widget manpage.

A short example. This is a File menu where the 'Save' and 'Close' entries are sensitive only if a file was opened. We presume that opening a file sets the 'worksheet' object, which is registered with this name to the Context of the associated FormFactory. Additionally the 'Manage rows' entry is active only if more than three rows are selected:

  $menu_tree = [
    _File => {
      item_type => <Branch>',
      children  => [
        _Open  => {
	  callback => \&open_worksheet,
	              # sets the 'worksheet' object
	},
	_Save => {
	  callback => \&save_worksheet,
	  object   => 'worksheet',
	},
	_Close => {
	  callback => \&close_worksheet,
	  object   => 'worksheet',
	},
        "_Manage rows" => {
          callback       => \&manage_rows,
          object         => 'worksheet',
          active_cond    => sub { $worksheet->get_selected_rows_cnt > 3 },
          active_depends => "worksheet.rows",
      ],
    },
  ];

default_callback = CODEREF [optional]

The default callback of this menu. Refer to Gtk2::Ex::Simple::Menu for details.

user_data = SCALAR [optional]

User data of the default callback of this menu. Refer to Gtk2::Ex::Simple::Menu for details.

For more attributes refer to Gtk2::Ex::FormFactory::Widget.

 Jörn Reder <joern at zyn dot de>

Copyright 2004-2006 by Jörn Reder.

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.