/usr/lib/perl5/Ace/Graphics/Glyph/arrow.pm is in libace-perl 1.92-2build3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 | package Ace::Graphics::Glyph::arrow;
# package to use for drawing an arrow
use strict;
use vars '@ISA';
@ISA = 'Ace::Graphics::Glyph';
sub bottom {
my $self = shift;
my $val = $self->SUPER::bottom(@_);
$val += $self->font->height if $self->option('tick');
$val += $self->labelheight if $self->option('label');
$val;
}
# override draw method
sub draw {
my $self = shift;
my $parallel = $self->option('parallel');
$parallel = 1 unless defined $parallel;
$self->draw_parallel(@_) if $parallel;
$self->draw_perpendicular(@_) unless $parallel;
}
sub draw_perpendicular {
my $self = shift;
my $gd = shift;
my ($x1,$y1,$x2,$y2) = $self->calculate_boundaries(@_);
my $ne = $self->option('northeast');
my $sw = $self->option('southwest');
$ne = $sw = 1 unless defined($ne) || defined($sw);
# draw a perpendicular arrow at position indicated by $x1
my $fg = $self->fgcolor;
my $a2 = $self->SUPER::height/4;
my @positions = $x1 == $x2 ? ($x1) : ($x1,$x2);
for my $x (@positions) {
if ($ne) {
$gd->line($x,$y1,$x,$y2,$fg);
$gd->line($x-$a2,$y1+$a2,$x,$y1,$fg);
$gd->line($x+$a2,$y1+$a2,$x,$y1,$fg);
}
if ($sw) {
$gd->line($x,$y1,$x,$y2,$fg);
$gd->line($x-$a2,$y2-$a2,$x,$y2,$fg);
$gd->line($x+$a2,$y2-$a2,$x,$y2,$fg);
}
}
# add a label if requested
if ($self->option('label')) {
$self->draw_label($gd,@_); # this draws the label aligned to the left
}
}
sub draw_parallel {
my $self = shift;
my $gd = shift;
my ($x1,$y1,$x2,$y2) = $self->calculate_boundaries(@_);
my $fg = $self->fgcolor;
my $a2 = $self->SUPER::height/2;
my $center = $y1+$a2;
my $ne = $self->option('northeast');
my $sw = $self->option('southwest');
# turn on both if neither specified
$ne = $sw = 1 unless defined($ne) || defined($sw);
# turn on ticks
if ($self->option('tick')) {
my $left = shift;
my $scale = $self->scale;
# figure out tick mark scale
# we want no more than 1 tick mark every 30 pixels
# and enough room for the labels
my $font = $self->font;
my $width = $font->width;
my $font_color = $self->fontcolor;
my $interval = 1;
my $mindist = 30;
my $widest = 5 + (length($self->end) * $width);
$mindist = $widest if $widest > $mindist;
my ($gcolor,$gtop,$gbottom);
if ($self->option('grid')) {
$gcolor = $self->color('grid');
my $panel_height = $self->factory->panel->height;
$gtop = $self->factory->panel->pad_top;
$gbottom = $panel_height - $self->factory->panel->pad_bottom;
}
while (1) {
my $pixels = $interval * $scale;
last if $pixels >= $mindist;
$interval *= 10;
}
my $first_tick = $interval * int(0.5 + $self->start/$interval);
for (my $i = $first_tick; $i < $self->end; $i += $interval) {
my $tickpos = $left + $self->map_pt($i);
$gd->line($tickpos,$gtop,$tickpos,$gbottom,$gcolor) if defined $gcolor;
$gd->line($tickpos,$center-$a2,$tickpos,$center+$a2,$fg);
}
if ($self->option('tick') >= 2) {
my $a4 = $self->SUPER::height/4;
for (my $i = $first_tick - $interval; $i < $self->end; $i += $interval/10) {
my $tickpos = $left + $self->map_pt($i);
$gd->line($tickpos,$gtop,$tickpos,$gbottom,$gcolor) if defined $gcolor;
$gd->line($tickpos,$center-$a4,$tickpos,$center+$a4,$fg);
}
}
for (my $i = $first_tick; $i < $self->end; $i += $interval) {
my $tickpos = $left + $self->map_pt($i);
my $middle = $tickpos - (length($i) * $width)/2;
$gd->string($font,$middle,$center+$a2-1,$i,$font_color)
if $middle > 0 && $middle < $self->factory->panel->width-($font->width * length $i);
}
}
$gd->line($x1,$center,$x2,$center,$fg);
if ($sw) { # west arrow
$gd->line($x1,$center,$x1+$a2,$center-$a2,$fg);
$gd->line($x1,$center,$x1+$a2,$center+$a2,$fg);
}
if ($ne) { # east arrow
$gd->line($x2,$center,$x2-$a2,$center+$a2,$fg);
$gd->line($x2,$center,$x2-$a2,$center-$a2,$fg);
}
# add a label if requested
$self->draw_label($gd,@_) if $self->option('label');
}
1;
__END__
=head1 NAME
Ace::Graphics::Glyph::arrow - The "arrow" glyph
=head1 SYNOPSIS
See L<Ace::Graphics::Panel> and L<Ace::Graphics::Glyph>.
=head1 DESCRIPTION
This glyph draws arrows. Depending on options, the arrows can be
labeled, be oriented vertically or horizontally, or can contain major
and minor ticks suitable for use as a scale.
=head2 OPTIONS
In addition to the common options, the following glyph-specific
options are recognized:
Option Description Default
------ ----------- -------
-tick Whether to draw major 0
and minor ticks.
0 = no ticks
1 = major ticks
2 = minor ticks
-parallel Whether to draw the arrow true
parallel to the sequence
or perpendicular to it.
-northeast Whether to draw the true
north or east arrowhead
(depending on orientation)
-southwest Whether to draw the true
south or west arrowhead
(depending on orientation)
Set -parallel to false to display a point-like feature such as a
polymorphism, or to indicate an important location. If the feature
start == end, then the glyph will draw a single arrow at the
designated location:
^
|
Otherwise, there will be two arrows at the start and end:
^ ^
| |
=head1 BUGS
Please report them.
=head1 SEE ALSO
L<Ace::Sequence>, L<Ace::Sequence::Feature>, L<Ace::Graphics::Panel>,
L<Ace::Graphics::Track>, L<Ace::Graphics::Glyph::anchored_arrow>,
L<Ace::Graphics::Glyph::arrow>,
L<Ace::Graphics::Glyph::box>,
L<Ace::Graphics::Glyph::primers>,
L<Ace::Graphics::Glyph::segments>,
L<Ace::Graphics::Glyph::toomany>,
L<Ace::Graphics::Glyph::transcript>,
=head1 AUTHOR
Lincoln Stein <lstein@cshl.org>.
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
|