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#############################################################################
# (c) by Tels 2004 - 2005. An empty filler cell. Part of Graph::Easy.
#
#############################################################################
package Graph::Easy::Node::Cell;
use Graph::Easy::Node;
use strict;
use warnings;
use vars qw(@ISA $VERSION);
@ISA = qw/Graph::Easy::Node/;
$VERSION = '0.76';
#############################################################################
sub _init
{
# generic init, override in subclasses
my ($self,$args) = @_;
$self->{class} = '';
$self->{name} = '';
$self->{'x'} = 0;
$self->{'y'} = 0;
# default: belongs to no node
$self->{node} = undef;
foreach my $k (sort keys %$args)
{
if ($k !~ /^(node|graph|x|y)\z/)
{
require Carp;
Carp::confess ("Invalid argument '$k' passed to Graph::Easy::Node::Cell->new()");
}
$self->{$k} = $args->{$k};
}
$self;
}
sub _correct_size
{
my $self = shift;
$self->{w} = 0;
$self->{h} = 0;
$self;
}
sub node
{
# return the node this cell belongs to
my $self = shift;
$self->{node};
}
sub as_ascii
{
'';
}
sub as_html
{
'';
}
sub group
{
my $self = shift;
$self->{node}->group();
}
1;
__END__
=head1 NAME
Graph::Easy::Node::Cell - An empty filler cell
=head1 SYNOPSIS
use Graph::Easy;
use Graph::Easy::Edge;
my $graph = Graph::Easy->new();
my $node = $graph->add_node('A');
my $path = Graph::Easy::Node::Cell->new(
graph => $graph, node => $node,
);
...
print $graph->as_ascii();
=head1 DESCRIPTION
A C<Graph::Easy::Node::Cell> is used to reserve a cell in the grid for nodes
that occupy more than one cell.
You should not need to use this class directly.
=head1 METHODS
=head2 error()
$last_error = $cell->error();
$cvt->error($error); # set new messages
$cvt->error(''); # clear error
Returns the last error message, or '' for no error.
=head2 node()
my $node = $cell->node();
Returns the node this filler cell belongs to.
=head1 SEE ALSO
L<Graph::Easy>.
=head1 AUTHOR
Copyright (C) 2004 - 2005 by Tels L<http://bloodgate.com>.
See the LICENSE file for more details.
=cut