AcePerl
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Ace/Graphics/Panel.pm view on Meta::CPAN
if ($direction >= 0) {
push @{$self->{tracks}},$track;
} else {
unshift @{$self->{tracks}},$track;
}
return $track;
}
sub height {
my $self = shift;
my $spacing = $self->spacing;
my $key_height = $self->format_key;
my $height = 0;
$height += $_->height + $spacing foreach @{$self->{tracks}};
$height + $key_height + $self->pad_top + $self->pad_bottom;
}
sub gd {
my $self = shift;
return $self->{gd} if $self->{gd};
my $width = $self->width;
my $height = $self->height;
my $gd = GD::Image->new($width,$height);
my %translation_table;
for my $name ('white','black',keys %COLORS) {
my $idx = $gd->colorAllocate(@{$COLORS{$name}});
$translation_table{$name} = $idx;
}
$self->{translations} = \%translation_table;
$self->{gd} = $gd;
my $offset = 0;
my $pl = $self->pad_left;
my $pt = $self->pad_top;
for my $track (@{$self->{tracks}}) {
$track->draw($gd,$pl,$offset+$pt);
$offset += $track->height + $self->spacing;
}
$self->draw_key($gd,$pl,$offset);
return $self->{gd} = $gd;
}
sub draw_key {
my $self = shift;
my ($gd,$left,$top) = @_;
my $key_glyphs = $self->{key_glyphs} or return;
my $color = $self->translate($self->{keycolor});
$gd->filledRectangle($left,$top,$self->width,$self->height,$color);
$gd->string(KEYLABELFONT,$left,KEYPADTOP+$top,"KEY:",1);
$top += KEYLABELFONT->height + KEYPADTOP;
$_->draw($gd,$left,$top) foreach @$key_glyphs;
}
# Format the key section, and return its height
sub format_key {
my $self = shift;
return $self->{key_height} if defined $self->{key_height};
my ($height,$width) = (0,0);
my %tracks;
my @glyphs;
# determine how many glyphs become part of the key
# and their max size
for my $track (@{$self->{tracks}}) {
next unless $track->option('key');
my $glyph = $track->keyglyph;
$tracks{$track} = $glyph;
my ($h,$w) = ($glyph->height,
$glyph->right-$glyph->left);
$height = $h if $h > $height;
$width = $w if $w > $width;
push @glyphs,$glyph;
}
$width += $self->{keyspacing};
# no key glyphs, no key
return $self->{key_height} = 0 unless @glyphs;
# now height and width hold the largest glyph, and $glyph_count
# contains the number of glyphs. We will format them into a
# box that is roughly 3 height/4 width (golden mean)
my $rows = 0;
my $cols = 0;
while (++$rows) {
$cols = @glyphs / $rows;
$cols = int ($cols+1) if $cols =~ /\./; # round upward for fractions
my $total_width = $cols * $width;
my $total_height = $rows * $width;
last if $total_width <= $self->width;
}
# move glyphs into row-major format
my $spacing = $self->spacing;
my $i = 0;
for (my $c = 0; $c < $cols; $c++) {
for (my $r = 0; $r < $rows; $r++) {
my $x = $c * ($width + $spacing);
my $y = $r * ($height + $spacing);
next unless defined $glyphs[$i];
$glyphs[$i]->move($x,$y);
$i++;
}
}
$self->{key_glyphs} = \@glyphs; # remember our key glyphs
# remember our key height
return $self->{key_height} = ($height+$spacing) * $rows + KEYLABELFONT->height +KEYPADTOP;
}
# reverse of translate(); given index, return rgb triplet
sub rgb {
Ace/Graphics/Panel.pm view on Meta::CPAN
yellow FF FF 00
yellowgreen 9A CD 32
__END__
=head1 NAME
Ace::Graphics::Panel - PNG graphics of Ace::Sequence::Feature objects
=head1 SYNOPSIS
use Ace::Sequence;
use Ace::Graphics::Panel;
my $db = Ace->connect(-host=>'brie2.cshl.org',-port=>2005) or die;
my $cosmid = Ace::Sequence->new(-seq=>'Y16B4A',
-db=>$db,-start=>-15000,-end=>15000) or die;
my @transcripts = $cosmid->transcripts;
my $panel = Ace::Graphics::Panel->new(
-segment => $cosmid,
-width => 800
);
$panel->add_track(arrow => $cosmid,
-bump => 0,
-tick=>2);
$panel->add_track(transcript => \@transcripts,
-fillcolor => 'wheat',
-fgcolor => 'black',
-key => 'Curated Genes',
-bump => +1,
-height => 10,
-label => 1);
my $boxes = $panel->boxes;
print $panel->png;
=head1 DESCRIPTION
The Ace::Graphics::Panel class provides drawing and formatting
services for Ace::Sequence::Feature objects or Das::Segment::Feature
objects.
Typically you will begin by creating a new Ace::Graphics::Panel
object, passing it the width of the visual display and the length of
the segment.
You will then call add_track() one or more times to add sets of
related features to the picture. When you have added all the features
you desire, you may call png() to convert the image into a PNG-format
image, or boxes() to return coordinate information that can be used to
create an imagemap.
Note that this modules depends on GD.
=head1 METHODS
This section describes the class and object methods for
Ace::Graphics::Panel.
=head2 CONSTRUCTORS
There is only one constructor, the new() method.
=over 4
=item $panel = Ace::Graphics::Panel->new(@options)
The new() method creates a new panel object. The options are
a set of tag/value pairs as follows:
Option Value Default
------ ----- -------
-length Length of sequence segment, in bp 0
-segment An Ace::Sequence or Das::Segment none
object, used to derive length if
not provided
-offset Base pair to place at extreme left $segment->start
of image.
-width Desired width of image, in pixels 600
-spacing Spacing between tracks, in pixels 5
-pad_top Additional whitespace between top 0
of image and contents, in pixels
-pad_bottom Additional whitespace between top 0
of image and bottom, in pixels
-pad_left Additional whitespace between left 0
of image and contents, in pixels
-pad_right Additional whitespace between right 0
of image and bottom, in pixels
-keycolor Background color for the key printed 'cornsilk'
at bottom of panel (if any)
-keyspacing Spacing between key glyphs in the 10
key printed at bottom of panel
(if any)
Typically you will pass new() an object that implements the
Bio::RangeI interface, providing a length() method, from which the
panel will derive its scale.
$panel = Ace::Graphics::Panel->new(-segment => $sequence,
-width => 800);
new() will return undef in case of an error. If the specified glyph
name is not a valid one, new() will throw an exception.
=back
Ace/Graphics/Panel.pm view on Meta::CPAN
Option Description Default
------ ----------- -------
-glyph Glyph to use none
-fgcolor Foreground color black
-outlinecolor black
Synonym for -fgcolor
-bgcolor Background color white
-fillcolor Interior color of filled turquoise
images
-linewidth Width of lines drawn by 1
glyph
-height Height of glyph 10
-font Glyph font gdSmallFont
-label Whether to draw a label false
-bump Bump direction 0
-connect_groups false
Connect groups by a
dashed line (see below)
-key Show this track in the undef
key
Colors can be expressed in either of two ways: as symbolic names such
as "cyan" and as HTML-style #RRGGBB triples. The symbolic names are
the 140 colors defined in the Netscape/Internet Explorer color cube,
and can be retrieved using the Ace::Graphics::Panel->color_names()
method.
The background color is used for the background color of the track
itself. The foreground color controls the color of lines and strings.
The interior color is used for filled objects such as boxes.
The -label argument controls whether or not the ID of the feature
should be printed next to the feature. It is accepted by most, but
not all of the glyphs.
The -bump argument controls what happens when glyphs collide. By
default, they will simply overlap (value 0). A -bump value of +1 will
cause overlapping glyphs to bump downwards until there is room for
them. A -bump value of -1 will cause overlapping glyphs to bump
upwards.
The -key argument declares that the track is to be shown in a key
appended to the bottom of the image. The key contains a picture of a
glyph and a label describing what the glyph means. The label is
specified in the argument to -key.
If present, the -glyph argument overrides the glyph given in the first
or second argument.
add_track() returns an Ace::Graphics::Track object. You can use this
object to add additional features or to control the appearance of the
track with greater detail, or just ignore it. Tracks are added in
order from the top of the image to the bottom. To add tracks to the
top of the image, use unshift_track().
Typical usage is:
$panel->add_track( thistle => \@genes,
-fillcolor => 'green',
-fgcolor => 'black',
-bump => +1,
-height => 10,
-label => 1);
=item $track = unshift_track($glyph,$features,@options)
unshift_track() works like add_track(), except that the new track is
added to the top of the image rather than the bottom.
B<Adding groups of features:> It is not uncommon to add a group of
features which are logically connected, such as the 5' and 3' ends of
EST reads. To group features into sets that remain on the same
horizontal position and bump together, pass the sets as an anonymous
array. To connect the groups by a dashed line, pass the
-connect_groups argument with a true value. For example:
$panel->add_track(segments => [[$abc_5,$abc_3],
[$xxx_5,$xxx_3],
[$yyy_5,$yyy_3]],
-connect_groups => 1);
=item $gd = $panel->gd
The gd() method lays out the image and returns a GD::Image object
containing it. You may then call the GD::Image object's png() or
jpeg() methods to get the image data.
=item $png = $panel->png
The png() method returns the image as a PNG-format drawing, without
the intermediate step of returning a GD::Image object.
=item $boxes = $panel->boxes
=item @boxes = $panel->boxes
The boxes() method returns the coordinates of each glyph, useful for
constructing an image map. In a scalar context, boxes() returns an
array ref. In an list context, the method returns the array directly.
Each member of the list is an anonymous array of the following format:
[ $feature, $x1, $y1, $x2, $y2 ]
The first element is the feature object; either an
Ace::Sequence::Feature, a Das::Segment::Feature, or another Bioperl
Bio::SeqFeatureI object. The coordinates are the topleft and
bottomright corners of the glyph, including any space allocated for
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