/usr/share/algotutor/Vertex.pm is in algotutor 0.8.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# For more info, including license, please see doc/index.html
package Vertex;
# Vertex of a Graph
use strict;
use Carp;
use vars qw(@ISA);
@ISA = qw(Configurable);
use Configurable;
use Vector2;
use overload
'""' => 'stringify',
'fallback' => 1
# 'eq' => '()',
# 'fallback' => undef
;
sub new {
my ($class, $host, $pos, %opts) = @_;
$class = ref($class) if ref($class);
my ($self) = $class->SUPER::new(%opts);
$self->{"#host"} = $host;
my ($cv) = $self->host()->cget(-canvas);
my ($sh) = $self->cget(-shape);
if ("\L$sh" eq "oval") {
$self->{shape_id} = $cv->createOval(0,0,2,2);
} else {
$self->{shape_id} = $cv->createRectangle(0,0,2,2);
}
$self->{text_id} = $cv->createText(0, 0, -justify=>"center");
$self->set_pos($pos);
$self->set_size($self->cget(-size));
$self->configure($self->get_all_opts());
# the following is needed for easier binding statements
# $self->{-host}{-canvas}->addtag($self->{-name}, "withtag", $self->{shape_id});
# $self->{-host}{-canvas}->addtag($self->{-name}, "withtag", $self->{text_id});
return $self;
}
sub destroy {
my ($self) = @_;
$self->host()->cget(-canvas)->delete(@{$self}{"shape_id","text_id"});
}
sub host {
return $_[0]->{"#host"};
}
sub _get_cv_geom_ {
my ($self) = @_;
my (@t) = $self->host()->cget(-canvas)->coords($self->{shape_id});
return (
Vector2->new(($t[0] + $t[2]) / 2, ($t[1] + $t[3]) / 2),
Vector2->new(abs($t[0] - $t[2]), abs($t[1] - $t[3])),
);
}
sub pos {
my ($self) = @_;
croak "you probably wanted to call set_pos()?" if $#_>0;
my ($lt) = $self->host()->cget(-linear_transform);
my ($pos, undef) = $self->_get_cv_geom_();
return ($pos - $lt->{-offset})->pw_div($lt->{-scale});
}
sub size {
my ($self) = @_;
croak "you probably wanted to call set_size()?" if $#_>0;
my ($lt) = $self->host()->cget(-linear_transform);
my (undef, $size) = $self->_get_cv_geom_();
return $size->pw_div($lt->{-scale});
}
sub set_pos {
my ($self, $pos) = @_;
my ($lt) = $self->host()->cget(-linear_transform);
my (undef, $size) = $self->_get_cv_geom_();
$size = $size->pw_div(2);
$pos = $pos->pw_mul($lt->{-scale}) + $lt->{-offset};
my ($cv) = $self->host()->cget(-canvas);
$cv->coords($self->{text_id}, @$pos);
$cv->coords($self->{shape_id},
@{ $pos-$size }, @{ $pos+$size }
);
}
sub set_size {
my ($self, $size) = @_;
my ($lt) = $self->host()->cget(-linear_transform);
my ($pos, undef) = $self->_get_cv_geom_();
$size = $lt->{-scale}->pw_mul($size)->pw_div(2);
$self->host()->cget(-canvas)->coords($self->{shape_id},
@{ $pos-$size }, @{ $pos+$size }
);
}
sub configure {
my ($self, %opts) = @_;
my ($k, %shape_opts, %text_opts);
my ($opt_map) = {
-text => [undef, "-text"],
-fill => ["-fill", undef],
-outline => ["-outline", "-fill"],
-thick => ["-width", undef],
-arrow => ["-arrow", undef],
-stipple => ["-stipple", undef],
-outlinestipple => [undef, undef],
-state => ["-state", "-state"],
};
if (exists $opts{-name}) {
$self->{-name} = delete $opts{-name};
$opts{-text} = $self->cget(-display)->($self)
if ref $self->cget(-display) eq "CODE";
}
if (exists $opts{-content}) {
$self->{-content} = delete $opts{-content};
$opts{-text} = $self->cget(-display)->($self)
if ref $self->cget(-display) eq "CODE";
}
if (exists $opts{-status}) {
$self->{-status} = delete $opts{-status};
my ($ha) = $self->host()->cget(-appearance);
carp "unknown status $self->{-status} ignored"
unless exists $ha->{$self->{-status}};
%opts = (%{ $ha->{$self->{-status}} }, %opts);
}
foreach $k (keys %opts) {
carp "unknown option $k ignored" unless exists($opt_map->{$k});
$shape_opts{ $opt_map->{$k}[0] } = $opts{$k}
if defined $opt_map->{$k}[0];
$text_opts{ $opt_map->{$k}[1] } = $opts{$k}
if defined $opt_map->{$k}[1];
}
my ($cv) = $self->host()->cget(-canvas);
$cv->itemconfigure($self->{shape_id}, %shape_opts);
$cv->itemconfigure($self->{text_id}, %text_opts);
}
sub display {
# serves to print or display a vertex
my ($self) = @_;
my ($s) = $self->cget(-display)->($self);
$s =~ s/\n/ /g;
return "V[$s]";
}
sub stringify {
# serves to identify a vertex, such as key for hash
my ($self) = @_;
return $self->cget(-name);
}
sub get_all_opts {
my ($self) = @_;
my (%opts) = $self->SUPER::get_all_opts();
delete @opts{qw(-display -shape -size)};
return %opts;
}
$::Config->{Vertex} = {
-shape => "oval",
-size => Vector2->new(50, 30),
-status => "init",
-display => sub { return $_[0]->cget(-name); }
};
1;
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