package Bio::Graphics::Glyph::weighted_arrow;
use strict;
use base qw(Bio::Graphics::Glyph::generic);
use Math::Trig;
sub default_weight_size
{
return 8;
}
sub default_length
{
return 20;
}
sub default_left_alignment
{
return 1;
}
sub draw_component {
my $self = shift;
my $gd = shift;
my ($x1,$y1,$x2,$y2) = $self->calculate_boundaries(@_);
my $fg = $self->fgcolor;
my $bg = $self->bgcolor;
my $weight_size = defined $self->option('weight_size') ? $self->option('weight_size') : $self->default_weight_size();
my $length = defined $self->option('length') ? $self->option('length') : $self->default_length();
my $left_alignment = defined $self->option('left_alignment') ? $self->option('left_alignment') : $self->default_left_alignment();
my ($w_x1, $l_x1);
if ($left_alignment == 1)
{
$w_x1 = $x1+1;
$l_x1 = $x1;
}
else
{
$w_x1 = $x2-1-$weight_size;
$l_x1 = $x2;
}
my $poly_pkg = $self->polygon_package;
my $polygon = $poly_pkg->new();
$polygon->addPt($w_x1,$y2);
$polygon->addPt($w_x1,$y2-$weight_size);
$polygon->addPt($w_x1+$weight_size,$y2-$weight_size);
$polygon->addPt($w_x1+$weight_size,$y2);
$gd->filledPolygon($polygon,$bg);
my $angle = deg2rad(30);
my $dx = 6;
my $dy = 4;
my $midX = $x2-$dx;
my $midY = $y1+$dy;
$gd->line($l_x1, $y2, $l_x1, $y1+$dy, $fg);
return unless $left_alignment == 1;
return if ($x2-$x1 <= $weight_size);
$x2 = $x1+$weight_size+1+$length;
$gd->line($l_x1, $midY, $x2, $midY, $fg);
$gd->line($x2, $midY, $x2-$dx, $y1, $fg);
$gd->line($x2, $midY, $x2-$dx, $y1+2*$dy, $fg);
}
1;
__END__
=head1 NAME
Bio::Graphics::Glyph::weighted_arrow - The "weighted arrow" glyph
=head1 SYNOPSIS
See L<Bio::Graphics::Panel> and L<Bio::Graphics::Glyph>.
=head1 DESCRIPTION
This glyph draws an arrow which has is "weighted" by a square
on the left side of the glyph or a "weight" and a vertical line, but
no arrow on its right side. The arrow/line is drawn with the foreground
color, the square - with the background color.
The first mode is the default. To get the second mode, specify
the "left_alignment 0" option.
=head2 OPTIONS
In addition to the common options, the following glyph-specific
options are recognized:
Option Description Default
------ ----------- -------
-weight_size
Size of the square 8
-length Length of the arrow 20
-left_alignment
Whether the glyph is drawn 1
on the left or on the right
side of the available space.
-height Standard option, but 10
important here
=head1 BUGS
Please report them.
=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
Vsevolod (Simon) Ilyushchenko E<lt>simonf@cshl.eduE<gt>.
Copyright (c) 2004 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