/usr/share/perl5/HTML/Widget/Element/RadioGroup.pm is in libhtml-widget-perl 1.11-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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use warnings;
use strict;
use base 'HTML::Widget::Element';
*value = \&checked;
__PACKAGE__->mk_accessors(
qw/
comment label values labels comments checked _current_subelement
constrain_values legend retain_default/
);
=head1 NAME
HTML::Widget::Element::RadioGroup - Radio Element grouping
=head1 SYNOPSIS
my $e = $widget->element( 'RadioGroup', 'foo' );
$e->comment('(Required)');
$e->label('Foo'); # label for the whole thing
$e->values([qw/foo bar gorch/]);
$e->labels([qw/Fu Bur Garch/]); # defaults to ucfirst of values
$e->comments([qw/funky/]); # defaults to empty
$e->value("foo"); # the currently selected value
$e->constrain_values(1);
=head1 DESCRIPTION
RadioGroup Element.
As of version 1.09, an L<In constraint|HTML::Widget::Constraint::In> is no
longer automatically added to RadioGroup elements. Use L</constrain_values>
to provide this functionality.
=head1 METHODS
=head2 comment
Add a comment to this Element.
=head2 label
This label will be placed next to your Element.
=head2 legend
Because the RadioGroup is placed in a C<fieldset> tag, you can also set a
</legend> value. Note, however, that if you want the RadioGroup to be styled
the same as other elements, the L</label> setting is recommended.
=head2 values
List of form values for radio checks.
Will also be used as labels if not otherwise specified via L<labels>.
=head2 checked
=head2 value
Set which radio element will be pre-set to "checked".
L</value> is provided as an alias for L</checked>.
=head2 labels
The labels for corresponding L</values>.
=head2 constrain_values
If true, an L<In constraint|HTML::Widget::Constraint::In> will
automatically be added to the widget, using the values from L</values>.
=head2 retain_default
If true, overrides the default behaviour, so that after a field is missing
from the form submission, the xml output will contain the default value,
rather than be empty.
=head2 new
=cut
sub new {
my ( $class, $opts ) = @_;
my $self = $class->NEXT::new($opts);
my $values = $opts->{values};
$self->values($values);
$self;
}
=head2 prepare
=cut
sub prepare {
my ( $self, $w, $value ) = @_;
if ( $self->constrain_values ) {
my $name = $self->name;
my %seen;
my @uniq = grep { !$seen{$_}++ } @{ $self->values };
$w->constraint( 'In', $name )->in(@uniq)
if @uniq;
}
return;
}
=head2 containerize
=cut
sub containerize {
my ( $self, $w, $value, $errors, $args ) = @_;
$value = $self->value
if ( not defined $value )
and $self->retain_default || not $args->{submitted};
$value = '' if not defined $value;
my $name = $self->name;
my @values = @{ $self->values || [] };
my @labels = @{ $self->labels || [] };
@labels = map {ucfirst} @values unless @labels;
my @comments = @{ $self->comments || [] };
my $i;
my @radios = map {
$self->_current_subelement( ++$i ); # yucky hack
my $radio = $self->mk_input(
$w,
{ type => 'radio',
( $_ eq $value ? ( checked => "checked" ) : () ),
value => $_,
} );
$radio->attr( class => "radio" );
my $label = $self->mk_label( $w, shift @labels, shift @comments );
$label->unshift_content($radio);
$label;
} @values;
$self->_current_subelement(undef);
my $fieldset = HTML::Element->new('fieldset');
$fieldset->attr( class => 'radiogroup_fieldset' );
my $outer_id = $self->attributes->{id} || $self->id($w);
if ( defined $self->legend ) {
my $legend = HTML::Element->new('legend');
$legend->attr( class => 'radiogroup_legend' );
$legend->push_content( $self->legend );
$fieldset->push_content($legend);
}
# don't pass commment to mk_label, we'll handle it ourselves
my $l = $self->mk_label( $w, $self->label, undef, $errors );
if ($l) {
$l->tag('span');
$l->attr( for => undef );
$l->attr( class => 'radiogroup_label' );
}
if ( defined $self->comment ) {
my $c = HTML::Element->new(
'span',
id => "$outer_id\_comment",
class => 'label_comments'
);
$c->push_content( $self->comment );
$fieldset->push_content($c);
}
my $element = HTML::Element->new('span');
$element->attr( class => 'radiogroup' );
$element->push_content(@radios);
$fieldset->push_content($element);
if ($errors) {
my $save = $fieldset;
$fieldset = HTML::Element->new('span');
$fieldset->attr( class => 'labels_with_errors' );
$fieldset->attr( id => $outer_id );
$fieldset->push_content($save);
}
else {
$fieldset->attr( id => $outer_id );
}
return $self->container( {
element => $fieldset,
error => scalar $self->mk_error( $w, $errors ),
label => $l,
} );
}
=head2 id
=cut
sub id {
my ( $self, $w ) = @_;
my $id = $self->SUPER::id($w);
my $subelem = $self->_current_subelement;
return $subelem
? "${id}_$subelem"
: $id;
}
=head1 CSS
=head2 Horizontal Alignment
To horizontally align the radio buttons with the label, use the following
CSS.
.radiogroup > label {
display: inline;
}
=head2 Changes in version 1.10
A RadioGroup is now rendered using a C<fieldset> tag, instead of a C<label>
tag. This is because the individual radio buttons also use labels, and the
W3C xhtml specification forbids nested C<label> tags.
To ensure RadioGroup elements are styled similar to other elements, you must
change any CSS C<label> definitions to also target the RadioGroup's class.
This means changing any C<label { ... }> definition to
C<label, .radiogroup_fieldset { ... }>. If you're using the C<simple.css>
example file, testing with firefox shows you'll also need to add
C<margin: 0em;> to that definition to get the label to line up with other
elements.
If you find the RadioGroup C<fieldset> picking up styles intended only for
other fieldsets, you can either override those styles with your
C<label, .radiogroup_fieldset { ... }> definition, or you can change your
C<fieldset { ... }> definition to C<.widget_fieldset{ ... }> to specifically
target any Fieldset elements other than the RadioGroup's.
Previously, if there were any errors, the L<label> tag was given the
classname C<labels_with_errors>. Now, if there's errors, the RadioGroup
C<fieldset> tag is wrapped in a C<span> tag which is given the classname
C<labels_with_errors>. To ensure that any C<labels_with_errors> styles are
properly displayed around RadioGroups, you must add C<display: block;> to
your C<.labels_with_errros{ ... }> definition.
=head1 SEE ALSO
L<HTML::Widget::Element>
=head1 AUTHOR
Jess Robinson
Yuval Kogman
=head1 LICENSE
This library is free software, you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
1;
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