# Copyright 2008, 2009, 2010 Kevin Ryde
# This file is part of Chart.
#
# Chart 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 3, or (at your option) any later version.
#
# Chart 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.
#
# You should have received a copy of the GNU General Public License along
# with Chart. If not, see <http://www.gnu.org/licenses/>.
package App::Chart::Series::Derived::Prev;
use 5.008;
use strict;
use warnings;
use Locale::TextDomain ('App-Chart');
use App::Chart::Database;
use App::Chart::TZ;
use base 'App::Chart::Series::Indicator';
sub longname { __('Prev') }
*shortname = \&longname;
use constant
{ manual => undef,
type => 'special', # for programming mainly
priority => -1000,
parameter_info => [ { name => __('Days'),
key => 'prev_days',
type => 'integer',
minimum => 1,
default => 20 } ],
};
sub new {
my ($class, $parent, $N) = @_;
my $p_timebase = $parent->timebase;
my $timebase = bless { %$p_timebase }, ref $p_timebase;
$timebase->{'base'} -= $N;
return $class->SUPER::new
(timebase => $timebase,
N => $N,
parent => $parent,
arrays => $parent->{'arrays'},
array_aliases => $parent->{'array_aliases'});
}
sub fill_part {
my ($self, $lo, $hi) = @_;
my $parent = $self->{'parent'};
$parent->fill ($lo, $hi);
}
1;
__END__
# =head1 NAME
#
# App::Chart::Series::Derived::Prev -- ...
#
# =head1 SYNOPSIS
#
# use App::Chart::Series::Derived::Prev;
# my $series = App::Chart::Series::Derived::Prev->new ($parent, $N);
#
# =head1 DESCRIPTION
#
# ...
#
# =head1 SEE ALSO
#
# L<App::Chart::Series>
#
# =cut