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# Copyright (c) 1997-2024
# Ewgenij Gawrilow, Michael Joswig, and the polymake team
# Technische Universität Berlin, Germany
# https://polymake.org
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any
# later version: http://www.gnu.org/licenses/gpl.txt.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#-------------------------------------------------------------------------------
require Polymake::Background;
package Polymake::Background::Viewer;
use Polymake::Struct (
[ '$graphics' => 'undef' ],
[ '$tempfile' => 'new Tempfile' ],
);
sub run {
my ($self, $synchronous)=@_;
my $outfile=$self->tempfile . $self->file_suffix;
open my $out, ">", $outfile or die "can't create the temporary file $outfile: $!\n";
print $out $self->graphics->toString or die "can't write to the temporary file $outfile: $!\n";
close $out;
my $command=$self->command($outfile);
$synchronous
? system($command)
: new Process({ CLEANUP => $self->tempfile }, $command);
undef $self->tempfile;
}
###########################################################################################
#
# Viewer not capable to show multiple pages in one process
package Polymake::SimpleViewer;
use Polymake::Struct [ '@ISA' => 'Background::Viewer' ];
sub new_drawing {
my ($self, $title)=@_;
if ($self == $self->graphics) {
# it's a File::Writer
$self->title=$title;
} else {
if ($self->graphics) {
run($self);
$self->tempfile=new Tempfile;
}
(my $pkg=ref($self)) =~ s/^(\w+)::.*/$1\::File/;
$self->graphics=$pkg->new($title);
}
$self
}
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