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1 package Bio::Graphics::Glyph::diamond;
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2 # DAS-compatible package to use for drawing a colored diamond
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3
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4 use strict;
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5 use vars '@ISA';
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6 use Bio::Graphics::Glyph::generic;
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7 @ISA = 'Bio::Graphics::Glyph::generic';
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8
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9 sub draw_component {
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10 my $self = shift;
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11 my $gd = shift;
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12 my $fg = $self->fgcolor;
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13
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14 # find the center and vertices
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15 my ($x1,$y1,$x2,$y2) = $self->calculate_boundaries(@_);
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16 my $xmid = ($x1+$x2)/2;
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17 my $ymid = ($y1+$y2)/2;
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18
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19 my $h = $self->option('height')/2;
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20 $y1 = $ymid - $h;
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21 $y2 = $ymid + $h;
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22
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23 # if it's a point-like feature, then draw symmetrically
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24 # around the midpoing
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25 if ($self->option('point') || $x2 - $x1 < $h*2) {
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26 $x1 = $xmid - $h;
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27 $x2 = $xmid + $h;
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28 }
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29
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30 elsif ($self->option('fallback_to_rectangle')) {
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31 return $self->SUPER::draw_component($gd,@_);
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32 }
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33
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34 $gd->line($x1,$ymid,$xmid,$y1,$fg);
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35 $gd->line($xmid,$y1,$x2,$ymid,$fg);
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36 $gd->line($x2,$ymid,$xmid,$y2,$fg);
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37 $gd->line($xmid,$y2,$x1,$ymid,$fg);
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38
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39 if (my $c = $self->bgcolor) {
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40 $gd->fillToBorder($xmid,$ymid,$fg,$c);
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41 }
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42 }
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43
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44 1;
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45
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46 __END__
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47
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48 =head1 NAME
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49
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50 Bio::Graphics::Glyph::diamond - The "diamond" glyph
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51
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52 =head1 SYNOPSIS
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53
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54 See L<Bio::Graphics::Panel> and L<Bio::Graphics::Glyph>.
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55
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56 =head1 DESCRIPTION
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57
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58 This glyph draws a diamond of fixed size, positioned in the center of
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59 the feature. The height and width of the diamond are set by the
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60 "height" option.
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61
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62 =head2 OPTIONS
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63
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64 The following options are standard among all Glyphs. See
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65 L<Bio::Graphics::Glyph> for a full explanation.
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66
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67 Option Description Default
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68 ------ ----------- -------
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69
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70 -fgcolor Foreground color black
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71
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72 -outlinecolor Synonym for -fgcolor
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73
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74 -bgcolor Background color turquoise
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75
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76 -fillcolor Synonym for -bgcolor
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77
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78 -linewidth Line width 1
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79
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80 -height Height of glyph 10
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81
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82 -font Glyph font gdSmallFont
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83
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84 -connector Connector type 0 (false)
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85
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86 -connector_color
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87 Connector color black
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88
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89 -label Whether to draw a label 0 (false)
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90
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91 -description Whether to draw a description 0 (false)
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92
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93 =head1 BUGS
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94
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95 If the feature is wider than a point, then the label and description
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96 are placed where the feature's boundary is, and not where the diamond
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97 is drawn.
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98
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99 =head1 SEE ALSO
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100
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101 L<Bio::Graphics::Panel>,
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102 L<Bio::Graphics::Glyph>,
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103 L<Bio::Graphics::Glyph::arrow>,
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104 L<Bio::Graphics::Glyph::cds>,
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105 L<Bio::Graphics::Glyph::crossbox>,
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106 L<Bio::Graphics::Glyph::diamond>,
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107 L<Bio::Graphics::Glyph::dna>,
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108 L<Bio::Graphics::Glyph::dot>,
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109 L<Bio::Graphics::Glyph::ellipse>,
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110 L<Bio::Graphics::Glyph::extending_arrow>,
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111 L<Bio::Graphics::Glyph::generic>,
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112 L<Bio::Graphics::Glyph::graded_segments>,
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113 L<Bio::Graphics::Glyph::heterogeneous_segments>,
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114 L<Bio::Graphics::Glyph::line>,
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115 L<Bio::Graphics::Glyph::pinsertion>,
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116 L<Bio::Graphics::Glyph::primers>,
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117 L<Bio::Graphics::Glyph::rndrect>,
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118 L<Bio::Graphics::Glyph::segments>,
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119 L<Bio::Graphics::Glyph::ruler_arrow>,
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120 L<Bio::Graphics::Glyph::toomany>,
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121 L<Bio::Graphics::Glyph::transcript>,
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122 L<Bio::Graphics::Glyph::transcript2>,
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123 L<Bio::Graphics::Glyph::translation>,
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124 L<Bio::Graphics::Glyph::triangle>,
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125 L<Bio::DB::GFF>,
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126 L<Bio::SeqI>,
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127 L<Bio::SeqFeatureI>,
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128 L<Bio::Das>,
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129 L<GD>
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130
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131 =head1 AUTHOR
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132
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133 Lincoln Stein E<lt>lstein@cshl.orgE<gt>
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134
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135 Copyright (c) 2001 Cold Spring Harbor Laboratory
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136
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137 This library is free software; you can redistribute it and/or modify
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138 it under the same terms as Perl itself. See DISCLAIMER.txt for
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139 disclaimers of warranty.
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140
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141 =cut
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