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Summary

Bio::Graphics::Glyph::Factory - Factory for Bio::Graphics::Glyph objects

Package variables

Included modules

Synopsis

See Bio::Graphics::Panel.

Description

This class is used internally by Bio::Graphics to generate new Glyph
objects by combining a list of features with the user's desired
configuration. It is intended to be used internally by Bio::Graphics.

Methods

Methods description

  Title    : clone
  Usage    : $f2 = $f->clone
  Function : Deep copy of a factory object
  Returns  : a deep copy of the factory object
  Args     : None
  Status   : Internal to Bio::Graphics

  Title    : feature_to_glyph
  Usage    : $glyph_name = $f->feature_to_glyph($feature)
  Function : choose the glyph name given a feature
  Returns  : a glyph name
  Args     : a Bio::Seq::FeatureI object
  Status   : Internal to Bio::Graphics

  Title    : font
  Usage    : $font = $f->font
  Function : accessor for the font
  Returns  : a font name
  Args     : None
  Status   : Internal to Bio::Graphics

  Title    : global_opts
  Usage    : $map = $f->global_opts
  Function : accessor for global options
  Returns  : a hash mapping option names to values
  Args     : None
  Status   : Internal to Bio::Graphics

  Title    : glyph_map
  Usage    : $map = $f->glyph_map
  Function : accessor for the glyph map
  Returns  : a hash mapping primary tags to glyphs
  Args     : None
  Status   : Internal to Bio::Graphics

  Title    : map_no_trunc
  Usage    : @pixel_positions = $f->map_no_trunc(@bp_positions)
  Function : map bp positions to pixel positions
  Returns  : a list of pixel positions
  Args     : a list of bp positions
  Status   : Internal to Bio::Graphics

  Title    : map_pt
  Usage    : @pixel_positions = $f->map_pt(@bp_positions)
  Function : map bp positions to pixel positions
  Returns  : a list of pixel positions
  Args     : a list of bp positions
  Status   : Internal to Bio::Graphics

  Title   : new
  Usage   : $f = Bio::Graphics::Glyph::Factory->new(
                     -stylesheet => $stylesheet,
		     -glyph_map  => $glyph_map,
		     -options    => $options);
  Function : create a new Bio::Graphics::Glyph::Factory object
  Returns  : the new object
  Args     : $stylesheet is a Bio::Das::Stylesheet object that can
                 convert Bio::Das feature objects into glyph names and
                 associated options.
             $glyph_map is a hash that maps primary tags to glyph names.
             $options is a hash that maps option names to their values.
  Status   : Internal to Bio::Graphics

  Title    : option_map
  Usage    : $map = $f->option_map
  Function : accessor for the option map
  Returns  : a hash mapping option names to values
  Args     : None
  Status   : Internal to Bio::Graphics

  Title    : options
  Usage    : @option_names = $f->options
  Function : return all configured option names
  Returns  : a list of option names
  Args     : none
  Status   : Internal to Bio::Graphics

  Title    : panel
  Usage    : $panel = $f->panel
  Function : accessor for Bio::Graphics::Panel
  Returns  : a Bio::Graphics::Panel
  Args     : None
  Status   : Internal to Bio::Graphics

  Title    : scale
  Usage    : $scale = $f->scale
  Function : accessor for the scale
  Returns  : a floating point number
  Args     : None
  Status   : Internal to Bio::Graphics

  Title    : set_option
  Usage    : $f->set_option($option_name=>$option_value)
  Function : set or change an option
  Returns  : nothing
  Args     : a name/value pair
  Status   : Internal to Bio::Graphics

  Title    : stylesheet
  Usage    : $stylesheet = $f->stylesheet
  Function : accessor for stylesheet
  Returns  : a Bio::Das::Stylesheet object
  Args     : None
  Status   : Internal to Bio::Graphics

  Title    : translate_color
  Usage    : $index = $f->translate_color($color_name)
  Function : translate symbolic color names into GD indexes
  Returns  : an integer
  Args     : a color name in format "green" or "#00FF00"
  Status   : Internal to Bio::Graphics

Methods code

sub clone {

  my $self = shift;
  my %new = %$self;
  my $new = bless\% new,ref($self);
  $new;

}

sub feature_to_glyph {

  my $self    = shift;
  my $feature = shift;

  return scalar $self->{stylesheet}->glyph($feature) if $self->{stylesheet};
  my $map = $self->glyph_map    or return 'generic';
  if (ref($map) eq 'CODE') {
    my $val = eval {$map->($feature)};
    warn $@ if $@;
    return $val || 'generic';
  }
  return $map->{$feature->primary_tag} || 'generic';

}

sub font {

  my $self = shift;
  my $glyph = shift;
  $self->option($glyph,'font') || $self->{font};

}

sub global_opts {

shift->{global_opts}

}

sub glyph_map {

 shift->{glyph_map}

}

sub make_glyph {

  my $self  = shift;
  my $level = shift;
  my @result;
  my $panel = $self->panel;
  my ($leftmost,$rightmost) = ($panel->left,$panel->right);
  my $flip   = $panel->flip;

  for my $f (@_) {

    my $type = $self->feature_to_glyph($f);
    my $glyphclass = 'Bio::Graphics::Glyph';
    $type ||= 'generic';
    $glyphclass .= "\:\:\L$type";

    unless ($LOADED_GLYPHS{$glyphclass}++) {
      carp("the requested glyph class, ``$type'' is not available: $@")
	unless (eval "require $glyphclass");
    }
    my $glyph = $glyphclass->new(-feature  => $f,
				 -factory  => $self,
				 -flip     => $flip,
				 -level    => $level);

    # this is removing glyphs that are not onscreen at all.
    # But never remove tracks!
    push @result,$glyph if $type eq 'track'
	|| ($glyph->{left} + $glyph->{width} > $leftmost && $glyph->{left} < $rightmost);

  }
  return wantarray ? @result : $result[0];

}

sub map_no_trunc {

  my $self = shift;
  my @result = $self->panel->map_no_trunc(@_);
  return wantarray ? @result : $result[0];

}

sub map_pt {

  my $self = shift;
  my @result = $self->panel->map_pt(@_);
  return wantarray ? @result : $result[0];

}

sub new {

  my $class = shift;
  my $panel = shift;
  my %args = @_;
  my $stylesheet = $args{-stylesheet};   # optional, for Bio::Das compatibility
  my $map        = $args{-map};          # map type name to glyph name
  my $options    = $args{-options};      # map type name to glyph options
  return bless {
		stylesheet => $stylesheet,
		glyph_map  => $map,
		options    => $options,
		panel      => $panel,
		},$class;

}

sub option {

  my $self = shift;
  my ($glyph,$option_name,$partno,$total_parts) = @_;
  return unless defined $option_name;
  $option_name = lc $option_name;   # canonicalize

  return $self->{overriding_options}{$option_name} 
    if exists $self->{overriding_options} && exists $self->{overriding_options}{$option_name};

  if (my $map    = $self->option_map) {
    if (defined(my $value  = $map->{$option_name})) {
      my $feature = $glyph->feature;
      return $value unless ref $value eq 'CODE';
      return unless $feature->isa('Bio::SeqFeatureI');
      my $val = eval { $value->($feature,$option_name,$partno,$total_parts,$glyph)};
      warn $@ if $@;
      return defined $val && $val eq '*default*' ? $GENERIC_OPTIONS{$option_name} : $val;
    }
  }

  if (my $ss = $self->stylesheet) {
    my($glyph,%options) = $ss->glyph($glyph->feature);
    my $value = $options{$option_name};
    return $value if defined $value;
  }

  return $GENERIC_OPTIONS{$option_name};

}

sub option_map {

 shift->{options}

}

sub options {

  my $self = shift;
  my %options;
  if (my $map    = $self->option_map) {
    $options{lc($_)}++ foreach keys %$map;
  }
  $options{lc($_)}++ foreach keys %GENERIC_OPTIONS;
  return keys %options;
}

1;

}

sub panel {

 shift->{panel}

}

sub scale {

 shift->{panel}->scale

}

sub set_option {

  my $self = shift;
  my ($option_name,$option_value) = @_;
  $self->{overriding_options}{lc $option_name} = $option_value;
}

# options:
#    the overriding_options hash has precedence
#    ...followed by the option_map
#    ...followed by the stylesheet
#    ...followed by generic options

}

sub stylesheet {

 shift->{stylesheet}

}

sub translate_color {

  my $self = shift;
  my $color_name = shift;
  $self->panel->translate_color($color_name);

}

General documentation

User feedback is an integral part of the evolution of this and other
Bioperl modules. Send your comments and suggestions preferably to one
of the Bioperl mailing lists. Your participation is much appreciated.

  bioperl-l@bioperl.org             - General discussion
  http://bioperl.org/MailList.shtml - About the mailing lists

Report bugs to the Bioperl bug tracking system to help us keep track
the bugs and their resolution. Bug reports can be submitted via
email or the web:

  bioperl-bugs@bio.perl.org
  http://bugzilla.bioperl.org/

Email - lstein@cshl.org

The rest of the documentation details each of the object
methods. Internal methods are usually preceded with an "_"
(underscore).

  Title    : glyph
  Usage    : @glyphs = $f->glyph($level,$feature1,$feature2...)
  Function : transform features into glyphs.
  Returns  : a list of Bio::Graphics::Glyph objects
  Args     : a feature "level", followed by a list of FeatureI objects.
  Status   : Internal to Bio::Graphics

The level is used to track the level of nesting of features that have
subfeatures.