package Tree::Visualize::ASCII::Layouts::Binary::TopDown;
use strict;
use warnings;
our $VERSION = '0.01';
use base qw(Tree::Visualize::ASCII::Layouts::Binary);
use Tree::Visualize::Exceptions;
use Tree::Visualize::Connector::Factory;
sub drawConnections {
my ($self, $current, $left, $right) = @_;
# prepare the connections
my ($left_connection, $right_connection) = (undef, undef);
my $conn_factory = Tree::Visualize::Connector::Factory->new();
# get the left connection if we need it
$left_connection = $conn_factory->get(
output => 'ASCII',
layout => 'TopDown',
connector_type => 'LeftRightConnector'
)->drawLeftConnector($current, $left)
if defined $left;
# get the right connection if we need it
$right_connection = $conn_factory->get(
output => 'ASCII',
layout => 'TopDown',
connector_type => 'LeftRightConnector'
)->drawRightConnector($current, $right)
if defined $right;
# return our connections
return ($left_connection, $right_connection);
}
sub assembleDrawing {
my ($self, $current, $children, $connections) = @_;
# get the children ...
my ($left, $right) = @{$children};
# if we have no left of no right, then just return
# otherwise we need to process them ...
unless (!$left && !$right) {
# stash the width of the current for later
my $orig_current_width = $current->width();
# get the connections ...
my ($left_connection, $right_connection) = @{$connections};
# paste the connections
$current->pasteLeft($left_connection) if defined $left_connection;
$current->pasteRight($right_connection) if defined $right_connection;
my $bottom = "";
if ($left) {
$left->padRight(" " x $orig_current_width);
if ($right) {
$bottom = $left->pasteRight($right);
}
else {
$bottom = $left;
}
}
elsif ($right) {
$bottom = $right->padLeft(" " x $orig_current_width);
}
# however, if we have them, then add them to the output
$current = $current->pasteBottom($bottom);
}
# # just debugging
# if (DEBUG) {
# debug->log("=" x 80);
# debug->log(join "\n" => map { "[$_]" } $current->getLinesAsArray());
# debug->log("=" x 80);
# }
return $current;
}
1;
__END__
=head1 NAME
Tree::Visualize::ASCII::Layouts::Binary::TopDown - A TopDown Tree::Binary and Tree::Binary::Search layout
=head1 SYNOPSIS
use Tree::Visualize::ASCII::Layouts::Binary::TopDown;
=head1 DESCRIPTION
=head1 METHODS
=over 4
=item B<assembleDrawing>
=item B<drawConnections>
=back
=head1 BUGS
None that I am aware of. Of course, if you find a bug, let me know, and I will be sure to fix it.
=head1 CODE COVERAGE
See the B<CODE COVERAGE> section in L<Tree::Visualize> for more inforamtion.
=head1 SEE ALSO
=head1 AUTHOR
stevan little, E<lt>stevan@iinteractive.comE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2004 by Infinity Interactive, Inc.
L<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut