Raw content of Bio::Graphics::Glyph::diamond
<![CDATA[package Bio::Graphics::Glyph::diamond;
# DAS-compatible package to use for drawing a colored diamond
use strict;
use vars '@ISA';
use Bio::Graphics::Glyph::generic;
@ISA = 'Bio::Graphics::Glyph::generic';
sub draw_component {
my $self = shift;
my $gd = shift;
my $fg = $self->fgcolor;
# find the center and vertices
my ($x1,$y1,$x2,$y2) = $self->calculate_boundaries(@_);
my $xmid = ($x1+$x2)/2;
my $ymid = ($y1+$y2)/2;
my $h = $self->option('height')/2;
$y1 = $ymid - $h;
$y2 = $ymid + $h;
# if it's a point-like feature, then draw symmetrically
# around the midpoing
if ($self->option('point') || $x2 - $x1 < $h*2) {
$x1 = $xmid - $h;
$x2 = $xmid + $h;
}
elsif ($self->option('fallback_to_rectangle')) {
return $self->SUPER::draw_component($gd,@_);
}
$gd->line($x1,$ymid,$xmid,$y1,$fg);
$gd->line($xmid,$y1,$x2,$ymid,$fg);
$gd->line($x2,$ymid,$xmid,$y2,$fg);
$gd->line($xmid,$y2,$x1,$ymid,$fg);
if (my $c = $self->bgcolor) {
$gd->fillToBorder($xmid,$ymid,$fg,$c);
}
}
1;
__END__
=head1 NAME
Bio::Graphics::Glyph::diamond - The "diamond" glyph
=head1 SYNOPSIS
See L<Bio::Graphics::Panel> and L<Bio::Graphics::Glyph>.
=head1 DESCRIPTION
This glyph draws a diamond of fixed size, positioned in the center of
the feature. The height and width of the diamond are set by the
"height" option.
=head2 OPTIONS
The following options are standard among all Glyphs. See
L<Bio::Graphics::Glyph> for a full explanation.
Option Description Default
------ ----------- -------
-fgcolor Foreground color black
-outlinecolor Synonym for -fgcolor
-bgcolor Background color turquoise
-fillcolor Synonym for -bgcolor
-linewidth Line width 1
-height Height of glyph 10
-font Glyph font gdSmallFont
-connector Connector type 0 (false)
-connector_color
Connector color black
-label Whether to draw a label 0 (false)
-description Whether to draw a description 0 (false)
=head1 BUGS
If the feature is wider than a point, then the label and description
are placed where the feature's boundary is, and not where the diamond
is drawn.
=head1 SEE ALSO
L<Bio::Graphics::Panel>,
L<Bio::Graphics::Glyph>,
L<Bio::Graphics::Glyph::arrow>,
L<Bio::Graphics::Glyph::cds>,
L<Bio::Graphics::Glyph::crossbox>,
L<Bio::Graphics::Glyph::diamond>,
L<Bio::Graphics::Glyph::dna>,
L<Bio::Graphics::Glyph::dot>,
L<Bio::Graphics::Glyph::ellipse>,
L<Bio::Graphics::Glyph::extending_arrow>,
L<Bio::Graphics::Glyph::generic>,
L<Bio::Graphics::Glyph::graded_segments>,
L<Bio::Graphics::Glyph::heterogeneous_segments>,
L<Bio::Graphics::Glyph::line>,
L<Bio::Graphics::Glyph::pinsertion>,
L<Bio::Graphics::Glyph::primers>,
L<Bio::Graphics::Glyph::rndrect>,
L<Bio::Graphics::Glyph::segments>,
L<Bio::Graphics::Glyph::ruler_arrow>,
L<Bio::Graphics::Glyph::toomany>,
L<Bio::Graphics::Glyph::transcript>,
L<Bio::Graphics::Glyph::transcript2>,
L<Bio::Graphics::Glyph::translation>,
L<Bio::Graphics::Glyph::triangle>,
L<Bio::DB::GFF>,
L<Bio::SeqI>,
L<Bio::SeqFeatureI>,
L<Bio::Das>,
L<GD>
=head1 AUTHOR
Lincoln Stein E<lt>lstein@cshl.orgE<gt>
Copyright (c) 2001 Cold Spring Harbor Laboratory
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself. See DISCLAIMER.txt for
disclaimers of warranty.
=cut
]]>