NAME

Ace::Graphics::Glyph::arrow - The "arrow" glyph

SYNOPSIS

See L<Ace::Graphics::Panel> and L<Ace::Graphics::Glyph>.

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.

OPTIONS

The following options are standard among all Glyphs. See 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)

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  Force a north or east         true
	      arrowhead(depending 
	      on orientation)

  -east       synonym of above

  -southwest  Force a south or west         true
	      arrowhead(depending 
	      on orientation)

  -west       synonym of above

  -double     force-doubleheaded arrow

  -base       Draw a vertical base at the   false
              non-arrowhead side

  -scale      Reset the labels on the arrow false
              to reflect an externally 
              established scale.

  -arrowstyle "regular" to create a simple arrowhead ->
              "filled" to create a thick filled arrowhead

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:

^              ^
|              |

Scale: Pass in a externally established scale to reset the labels on the arrow. This is particularly useful for manually constructed images where the founding parameters of the panel are not 1-based. For example, a genetic map interval ranging from 0.1 - 0.3 can be constructed by first multiplying every value by 100. Passing

arrow(-scale=>100);

will draw tick marks labelled appropriately to your external scale.

BUGS

Please report them.

SEE ALSO

Bio::Graphics::Panel, Bio::Graphics::Glyph, Bio::Graphics::Glyph::arrow, Bio::Graphics::Glyph::cds, Bio::Graphics::Glyph::crossbox, Bio::Graphics::Glyph::diamond, Bio::Graphics::Glyph::dna, Bio::Graphics::Glyph::dot, Bio::Graphics::Glyph::ellipse, Bio::Graphics::Glyph::extending_arrow, Bio::Graphics::Glyph::generic, Bio::Graphics::Glyph::graded_segments, Bio::Graphics::Glyph::heterogeneous_segments, Bio::Graphics::Glyph::line, Bio::Graphics::Glyph::pinsertion, Bio::Graphics::Glyph::primers, Bio::Graphics::Glyph::rndrect, Bio::Graphics::Glyph::segments, Bio::Graphics::Glyph::ruler_arrow, Bio::Graphics::Glyph::toomany, Bio::Graphics::Glyph::transcript, Bio::Graphics::Glyph::transcript2, Bio::Graphics::Glyph::translation, Bio::Graphics::Glyph::triangle, Bio::DB::GFF, Bio::SeqI, Bio::SeqFeatureI, Bio::Das, GD

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.