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package Chart::Clicker::Renderer::Point;
$Chart::Clicker::Renderer::Point::VERSION = '2.90';
use Moose;
# ABSTRACT: Point renderer
extends 'Chart::Clicker::Renderer';
use Geometry::Primitive::Circle;
use Geometry::Primitive::Point;
use Graphics::Primitive::Operation::Fill;
use Graphics::Primitive::Paint::Solid;
has 'shape' => (
is => 'rw',
does => 'Geometry::Primitive::Shape',
default => sub {
Geometry::Primitive::Circle->new({
radius => 3,
});
}
);
has 'shape_brush' => (
is => 'rw',
isa => 'Graphics::Primitive::Brush',
);
override('finalize', sub {
my ($self) = @_;
my $clicker = $self->clicker;
my $width = $self->width;
my $height = $self->height;
my $dses = $clicker->get_datasets_for_context($self->context);
foreach my $ds (@{ $dses }) {
foreach my $series (@{ $ds->series }) {
# TODO if undef...
my $ctx = $clicker->get_context($ds->context);
my $domain = $ctx->domain_axis;
my $range = $ctx->range_axis;
my $min = $range->range->lower;
my @vals = @{ $series->values };
my @keys = @{ $series->keys };
for(0..($series->key_count - 1)) {
my $x = $domain->mark($width, $keys[$_]);
next unless defined($x);
my $ymark = $range->mark($height, $vals[$_]);
next unless defined($ymark);
my $y = $height - $ymark;
$self->move_to($x, $y);
$self->draw_point($x, $y, $series, $_);
}
my $op = Graphics::Primitive::Operation::Fill->new(
paint => Graphics::Primitive::Paint::Solid->new(
color => $clicker->color_allocator->next
)
);
if(defined($self->shape_brush)) {
$op->preserve(1);
}
$self->do($op);
if(defined($self->shape_brush)) {
my $op3 = Graphics::Primitive::Operation::Stroke->new;
$op3->brush($self->shape_brush->clone);
$self->do($op3);
}
}
}
return 1;
});
sub draw_point {
my ($self, $x, $y, $series, $count) = @_;
my $shape = $self->shape->clone;
$shape->origin(Geometry::Primitive::Point->new(x => $x, y => $y));
$self->path->add_primitive($shape);
}
__PACKAGE__->meta->make_immutable;
no Moose;
1;
__END__
=pod
=head1 NAME
Chart::Clicker::Renderer::Point - Point renderer
=head1 VERSION
version 2.90
=head1 SYNOPSIS
my $pr = Chart::Clicker::Renderer::Point->new({
shape => Geometry::Primitive::Arc->new({
angle1 => 0,
angle2 => 180,
radius => 5
})
});
=head1 DESCRIPTION
Chart::Clicker::Renderer::Point renders a dataset as points.
=for HTML <p><img src="http://gphat.github.com/chart-clicker/static/images/examples/point.png" width="500" height="250" alt="Point Chart" /></p>
=head1 ATTRIBUTES
=head2 shape
Specify the L<shape|Geometry::Primitive::Shape> to be used at each point. Defaults to 360 degree arc with
a radius of 3.
=head2 shape_brush
Optionally provide a L<brush|Graphics::Primitive::Brush> with with to stroke each point.
=head1 METHODS
=head2 draw_point
Called for each point. Implemented as a separate method so that subclasses
such as Bubble may override the drawing.
=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
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