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//proc/self/root/usr/share/doc/perl-SVG-2.33/examples/attributeManip.pl

#!/usr/bin/perl -w
#
# Attribute manipulations
#
use strict;
use SVG;
# create an SVG object
#(c) 2003 Ronan Oger

my $svg= SVG->new(width=>200,height=>200);

$svg->title()->cdata('I am a title');

# use explicit element constructor to generate a group element

my $y=$svg->group(
    id    => 'group_y',
    style => { stroke=>'red', fill=>'green' }
);

$y->circle(cx=>100, cy=>100, r=>50, id=>'circle_in_group_y_1');
# add a circle to the group
$y->circle(cx=>100, cy=>100, r=>50, id=>'circle_in_group_y_2');
$y->comment('This is a comment');
$y->circle(cx=>100, cy=>100, r=>50, id=>'circle_in_group_y_3');
# now render the SVG object, implicitly use svg namespace
print "\nfirst drawing\n";
print $svg->xmlify;
print "\n\nSet stroke to red on circle_in_group_y_1\n";
my $node = $y->getElementByID('circle_in_group_y_1');
$node->setAttribute('stroke','red');
print $svg->xmlify;
print "\n\nSet stroke to green and undef the cx on circle_in_group_y_1\n";
$node->setAttributes({'stroke'=>'green',cx=>undef});
print $svg->xmlify;