Tk::Menu::Item man page on Kali

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Menu::Item(3pm)	      User Contributed Perl Documentation      Menu::Item(3pm)

NAME
       Tk::Menu::Item - Base class for Menu items

SYNOPSIS
	  require Tk::Menu::Item;

	  my $but = $menu->Button(...);
	  $but->configure(...);
	  my $what = $but->cget();

	  package Whatever;
	  require Tk::Menu::Item;
	  @ISA = qw(Tk::Menu::Item);

	  sub PreInit
	  {
	   my ($class,$menu,$info) = @_;
	   $info->{'-xxxxx'} = ...
	   my $y = delete $info->{'-yyyy'};
	  }

DESCRIPTION
       Tk::Menu::Item is the base class from which Tk::Menu::Button,
       Tk::Menu::Cascade, Tk::Menu::Radiobutton and Tk::Menu::Checkbutton are
       derived.	 There is also a Tk::Menu::Separator.

       Constructors are declared so that $menu->Button(...) etc. do what you
       would expect.

       The "-label" option is pre-processed allowing ~ to be prefixed to the
       character to derive a "-underline" value. Thus

	   $menu->Button(-label => 'Goto ~Home',...)

	   is equivalent to

	   $menu->Button(-label => 'Goto Home', -underline => 6, ...)

       The "Cascade" menu item creates a sub-menu and accepts these options:

       -menuitems
	   A list of items for the sub-menu.  Within this list (which is also
	   accepted by Menu and Menubutton) the first two elements of each
	   item should be the "constructor" name and the label:

	       -menuitems => [
			      [Button	   => '~Quit', -command => [destroy => $mw]],
			      [Checkbutton => '~Oil',  -variable => \$oil],
			     ]

       -postcommand
	   A callback to be invoked before posting the menu.

       -tearoff
	   Specifies whether sub-menu can be torn-off or not.

       -menuvar
	   Scalar reference that will be set to the newly-created sub-menu.

       The returned object is currently a blessed reference to an array of two
       items: the containing Menu and the 'label'.  Methods "configure" and
       "cget" are mapped onto underlying "entryconfigure" and "entrycget".

       The main purpose of the OO interface is to allow derived item classes
       to be defined which pre-set the options used to create a more basic
       item.

BUGS
       This OO interface is very new. Using the label as the "key" is a
       problem for separaror items which don't have one. The alternative would
       be to use an index into the menu but that is a problem if items are
       deleted (or inserted other than at the end).

       There should probably be a PostInit entry point too, or a more widget
       like defered 'configure'.

perl v5.26.0			  2017-07-22		       Menu::Item(3pm)
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