package Pod::Perldoc::ToTk;
use strict;
use warnings;

use vars qw($VERSION);
$VERSION = '3.19';

use parent qw(Pod::Perldoc::BaseTo);

sub is_pageable { 1 }
sub write_with_binmode { 0 }
sub output_extension { 'txt' } # doesn't matter
sub if_zero_length { } # because it will be 0-length!
sub new { return bless {}, ref($_[0]) || $_[0] }

# TODO: document these and their meanings...
sub tree { shift->_perldoc_elem('tree' , @_) }
sub tk_opt { shift->_perldoc_elem('tk_opt' , @_) }
sub forky { shift->_perldoc_elem('forky' , @_) }

use Pod::Perldoc ();
use File::Spec::Functions qw(catfile);

BEGIN{ # Tk is not core, but this is
eval { require Tk } ||
__PACKAGE__->die( <<"HERE" );
You must have the Tk module to use Pod::Perldoc::ToTk.
If you have it installed, ensure it's in your Perl library
path.
HERE

__PACKAGE__->die(
__PACKAGE__,
" doesn't work nice with Tk.pm version $Tk::VERSION"
) if $Tk::VERSION eq '800.003';
}


BEGIN { eval { require Tk::FcyEntry; }; };
BEGIN{ # Tk::Pod is not core, but this is
eval { require Tk::Pod } ||
__PACKAGE__->die( <<"HERE" );
You must have the Tk::Pod module to use Pod::Perldoc::ToTk.
If you have it installed, ensure it's in your Perl library
path.
HERE
}

# The following was adapted from "tkpod" in the Tk-Pod dist.

sub parse_from_file {

my($self, $Input_File) = @_;
if($self->{'forky'}) {
return if fork; # i.e., parent process returns
}

$Input_File =~ s{\\}{/}g
if $self->is_mswin32 or $self->is_dos
# and maybe OS/2
;

my($tk_opt, $tree);
$tree = $self->{'tree' };
$tk_opt = $self->{'tk_opt'};

#require Tk::ErrorDialog;

# Add 'Tk' subdirectories to search path so, e.g.,
# 'Scrolled' will find doc in 'Tk/Scrolled'

if( $tk_opt ) {
push @INC, grep -d $_, map catfile($_,'Tk'), @INC;
}

my $mw = MainWindow->new();
#eval 'use blib "/home/e/eserte/src/perl/Tk-App";require Tk::App::Debug';
$mw->withdraw;

# CDE use Font Settings if available
my $ufont = $mw->optionGet('userFont','UserFont'); # fixed width
my $sfont = $mw->optionGet('systemFont','SystemFont'); # proportional
if (defined($ufont) and defined($sfont)) {
foreach ($ufont, $sfont) { s/:$//; };
$mw->optionAdd('*Font', $sfont);
$mw->optionAdd('*Entry.Font', $ufont);
$mw->optionAdd('*Text.Font', $ufont);
}

$mw->optionAdd('*Menu.tearOff', $Tk::platform ne 'MSWin32' ? 1 : 0);

$mw->Pod(
'-file' => $Input_File,
(($Tk::Pod::VERSION >= 4) ? ('-tree' => $tree) : ())
)->focusNext;

# xxx dirty but it works. A simple $mw->destroy if $mw->children
# does not work because Tk::ErrorDialogs could be created.
# (they are withdrawn after Ok instead of destory'ed I guess)

if ($mw->children) {
$mw->repeat(1000, sub {
# ErrorDialog is withdrawn not deleted :-(
foreach ($mw->children) {
return if "$_" =~ /^Tk::Pod/ # ->isa('Tk::Pod')
}
$mw->destroy;
});
} else {
$mw->destroy;
}
#$mw->WidgetDump;
MainLoop();

exit if $self->{'forky'}; # we were the child! so exit now!
return;
}

1;
__END__


=head1 NAME

Pod::Perldoc::ToTk - let Perldoc use Tk::Pod to render Pod

=head1 SYNOPSIS

perldoc -o tk Some::Modulename &

=head1 DESCRIPTION

This is a "plug-in" class that allows Perldoc to use
Tk::Pod as a formatter class.

You have to have installed Tk::Pod first, or this class won't load.

=head1 SEE ALSO

L<Tk::Pod>, L<Pod::Perldoc>

=head1 AUTHOR

Current maintainer: Mark Allen C<< <[email protected]> >>

Past contributions from:
brian d foy C<< <[email protected]> >>
Adriano R. Ferreira C<< <[email protected]> >>;
Sean M. Burke C<< <[email protected]> >>;
significant portions copied from
F<tkpod> in the Tk::Pod dist, by Nick Ing-Simmons, Slaven Rezic, et al.

=cut