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package Chart::Clicker::Data::Range;
$Chart::Clicker::Data::Range::VERSION = '2.90';
use Moose;
use Moose::Util::TypeConstraints;
use constant EPSILON => 0.0001;
# ABSTRACT: A range of Data
subtype 'Lower'
=> as 'Num|Undef'
=> where { defined($_) };
coerce 'Lower'
=> from 'Undef'
=> via { - EPSILON };
has 'lower' => ( is => 'rw', isa => 'Lower', coerce => 1);
has 'max' => ( is => 'rw', isa => 'Num' );
has 'min' => ( is => 'rw', isa => 'Num' );
subtype 'Upper'
=> as 'Num|Undef'
=> where { defined($_) };
coerce 'Upper'
=> from 'Num|Undef'
=> via { EPSILON };
has 'upper' => ( is => 'rw', isa => 'Upper', coerce => 1);
has 'ticks' => ( is => 'rw', isa => 'Int', default => 5 );
after 'lower' => sub {
my $self = shift;
if(defined($self->{'min'})) {
$self->{'lower'} = $self->{'min'};
}
$self->{'lower'} = $self->{'min'} unless (defined($self->{'lower'}));
$self->{'upper'} = $self->{'max'} unless (defined($self->{'upper'}));
if(defined($self->{'lower'}) && defined($self->{'upper'}) && $self->{'lower'} == $self->{'upper'}) {
$self->{'lower'} = $self->{'lower'} - EPSILON;
$self->{'lower'} = $self->{'lower'} + EPSILON;
}
};
after 'upper' => sub {
my $self = shift;
if(defined($self->{'max'})) {
$self->{'upper'} = $self->{'max'};
}
$self->{'lower'} = $self->{'min'} unless (defined($self->{'lower'}));
$self->{'upper'} = $self->{'max'} unless (defined($self->{'upper'}));
if(defined($self->{'lower'}) && defined($self->{'upper'}) && $self->{'lower'} == $self->{'upper'}) {
$self->{'upper'} = $self->{'upper'} - EPSILON;
$self->{'upper'} = $self->{'upper'} + EPSILON;
}
};
after 'min' => sub {
my $self = shift;
if(defined($self->{'min'})) {
$self->{'lower'} = $self->{'min'};
}
};
after 'max' => sub {
my $self = shift;
if(defined($self->{'max'})) {
$self->{'upper'} = $self->{'max'};
}
};
sub add {
my ($self, $range) = @_;
if(defined($self->upper)) {
$self->upper($self->upper + $range->upper);
} else {
$self->upper($range->upper);
}
if(!defined($self->lower) || ($range->lower < $self->lower)) {
$self->lower($range->lower);
}
}
sub combine {
my ($self, $range) = @_;
unless(defined($self->min)) {
if(!defined($self->lower) || ($range->lower < $self->lower)) {
$self->lower($range->lower);
}
}
unless(defined($self->max)) {
if(!defined($self->upper) || ($range->upper > $self->upper)) {
$self->upper($range->upper);
}
}
return 1;
}
sub contains {
my ($self, $value) = @_;
return 1 if $value >= $self->lower && $value <= $self->upper;
return 0;
}
sub span {
my ($self) = @_;
my $span = $self->upper - $self->lower;
#we still want to be able to see flat lines!
if ($span <= EPSILON) {
$self->upper($self->upper() + EPSILON);
$self->lower($self->lower() - EPSILON);
$span = $self->upper - $self->lower;
}
return $span;
}
__PACKAGE__->meta->make_immutable;
no Moose;
1;
__END__
=pod
=head1 NAME
Chart::Clicker::Data::Range - A range of Data
=head1 VERSION
version 2.90
=head1 SYNOPSIS
use Chart::Clicker::Data::Range;
my $range = Chart::Clicker::Data::Range->new({
lower => 1,
upper => 10
});
=head1 DESCRIPTION
Chart::Clicker::Data::Range implements a range of values.
=head1 ATTRIBUTES
=head2 lower
Set/Get the lower bound for this Range
=head2 max
Set/Get the maximum value allowed for this Range. This value should only be
set if you want to EXPLICITLY set the upper value.
=head2 min
Set/Get the minimum value allowed for this Range. This value should only be
set if you want to EXPLICITLY set the lower value.
=head2 upper
Set/Get the upper bound for this Range
=head2 ticks
The number of ticks to be displayed for this range.
=head1 METHODS
=head2 add
Adds the specified range to this one. The lower is reduced to that of the
provided one if it is lower, and the upper is ADDED to this range's upper.
=head2 combine
Combine this range with the specified so that this range encompasses the
values specified. For example, adding a range with an upper-lower of 1-10
with one of 5-20 will result in a combined range of 1-20.
=head2 contains ($value)
Returns true if supplied value falls within this range (inclusive). Otherwise
returns false.
=head2 span
Returns the span of this range, or UPPER - LOWER.
=head1 AUTHOR
Cory G Watson <gphat@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2016 by Cory G Watson.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
