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| 1 : | sh002i | 1050 | #!/usr/math/bin/perl -w |
| 2 : | |||
| 3 : | =head1 NAME | ||
| 4 : | |||
| 5 : | Circle | ||
| 6 : | |||
| 7 : | =head1 SYNPOSIS | ||
| 8 : | |||
| 9 : | use Carp; | ||
| 10 : | use GD; | ||
| 11 : | use WWPlot; | ||
| 12 : | use Fun; | ||
| 13 : | |||
| 14 : | |||
| 15 : | =head1 DESCRIPTION | ||
| 16 : | |||
| 17 : | This module defines a circle which can be inserted as a stamp in a graph (WWPlot) object. | ||
| 18 : | |||
| 19 : | =head2 Command: | ||
| 20 : | |||
| 21 : | $circle_object = new Circle( $center_pos_x, $center_pos_y, $radius, $border_color, $fill_color); | ||
| 22 : | |||
| 23 : | |||
| 24 : | =head2 Examples: | ||
| 25 : | |||
| 26 : | Here is the code used to define the subroutines open_circle | ||
| 27 : | and closed_circle in PGgraphmacros.pl | ||
| 28 : | |||
| 29 : | sub open_circle { | ||
| 30 : | my ($cx,$cy,$color) = @_; | ||
| 31 : | new Circle ($cx, $cy, 4,$color,'nearwhite'); | ||
| 32 : | } | ||
| 33 : | |||
| 34 : | sub closed_circle { | ||
| 35 : | my ($cx,$cy, $color) = @_; | ||
| 36 : | $color = 'black' unless defined $color; | ||
| 37 : | new Circle ($cx, $cy, 4,$color, $color); | ||
| 38 : | } | ||
| 39 : | |||
| 40 : | $circle_object2 = closed_circle( $x_position, $y_position, $color ); | ||
| 41 : | |||
| 42 : | @circle_objects = $graph -> stamps($circle_object2); | ||
| 43 : | # puts a filled dot at ($x_position, $y_position) on the graph -- using real world coordinates. | ||
| 44 : | |||
| 45 : | =cut | ||
| 46 : | |||
| 47 : | |||
| 48 : | BEGIN { | ||
| 49 : | be_strict(); # an alias for use strict. This means that all global variable must contain main:: as a prefix. | ||
| 50 : | } | ||
| 51 : | |||
| 52 : | package Circle; | ||
| 53 : | |||
| 54 : | |||
| 55 : | |||
| 56 : | #use WWPlot; | ||
| 57 : | #Because of the way problem modules are loaded 'use' is disabled. | ||
| 58 : | |||
| 59 : | #use strict; | ||
| 60 : | #use vars qw($AUTOLOAD @ISA); | ||
| 61 : | @Circle::ISA = qw(WWPlot); | ||
| 62 : | |||
| 63 : | my %fields =( | ||
| 64 : | colors => {}, | ||
| 65 : | border_color => 0, | ||
| 66 : | fill_color => 1, | ||
| 67 : | radius => 8, | ||
| 68 : | ); | ||
| 69 : | |||
| 70 : | |||
| 71 : | sub new { | ||
| 72 : | my $class = shift; | ||
| 73 : | my $cx = shift; | ||
| 74 : | my $cy = shift; | ||
| 75 : | my $radius = shift; # radius is in pixels, others are in real world coordinates | ||
| 76 : | my $border_color = shift; | ||
| 77 : | my $fill_color = shift; | ||
| 78 : | $radius =4 unless defined $radius; | ||
| 79 : | $border_color = 'black' unless defined($border_color); | ||
| 80 : | $fill_color = 'black' unless defined($fill_color); | ||
| 81 : | |||
| 82 : | my $self = { im => new GD::Image(2*$radius, 2*$radius), | ||
| 83 : | |||
| 84 : | cx => $cx, | ||
| 85 : | cy => $cy, | ||
| 86 : | radius => $radius, | ||
| 87 : | border_color => $border_color, | ||
| 88 : | fill_color => $fill_color, | ||
| 89 : | |||
| 90 : | }; | ||
| 91 : | |||
| 92 : | bless $self, $class; | ||
| 93 : | $self -> _initialize_colors; | ||
| 94 : | if (defined($self->{'colors'}{$border_color} ) ) { | ||
| 95 : | $self->{'border_color'} = $self->{'colors'}{$border_color}; | ||
| 96 : | } else { | ||
| 97 : | $self->{'border_color'} = 'default_color'; | ||
| 98 : | } | ||
| 99 : | if (defined($self->{'colors'}{$fill_color} ) ) { | ||
| 100 : | $self->{'fill_color'} = $self->{'colors'}{$fill_color}; | ||
| 101 : | } else { | ||
| 102 : | $self->{'fill_color'} = 'nearwhite'; | ||
| 103 : | } | ||
| 104 : | $self->im->transparent($self->{'colors'}{'background_color'}); | ||
| 105 : | $self->im->arc($radius,$radius,2*$radius,2*$radius,0,360,$self->{'border_color'} ); | ||
| 106 : | $self->im->fill($radius,$radius,$self->{'fill_color'}); | ||
| 107 : | return $self; | ||
| 108 : | } | ||
| 109 : | |||
| 110 : | sub _initialize_colors { | ||
| 111 : | my $self = shift; | ||
| 112 : | # allocate some colors | ||
| 113 : | $self->{'colors'}{'background_color'} = $self->im->colorAllocate(255,255,255); | ||
| 114 : | $self->{'colors'}{'default_color'} = $self->im->colorAllocate(0,0,0); | ||
| 115 : | $self->{'colors'}{'white'} = $self->im->colorAllocate(255,255,255); | ||
| 116 : | $self->{'colors'}{'black'} = $self->im->colorAllocate(0,0,0); | ||
| 117 : | $self->{'colors'}{'red'} = $self->im->colorAllocate(255,0,0); | ||
| 118 : | $self->{'colors'}{'green'} = $self->im->colorAllocate(0,255,0); | ||
| 119 : | $self->{'colors'}{'blue'} = $self->im->colorAllocate(0,0,255); | ||
| 120 : | $self->{'colors'}{'yellow'} = $self->im->colorAllocate(255,255,0); | ||
| 121 : | $self->{'colors'}{'orange'} = $self->im->colorAllocate(255,100,0); | ||
| 122 : | $self->{'colors'}{'gray'} = $self->im->colorAllocate(180,180,180); | ||
| 123 : | $self->{'colors'}{'nearwhite'} = $self->im->colorAllocate(254,254,254); | ||
| 124 : | |||
| 125 : | } | ||
| 126 : | |||
| 127 : | sub size { | ||
| 128 : | my $s = shift; | ||
| 129 : | (2*$s->{radius}, 2*$s->{radius}); | ||
| 130 : | } | ||
| 131 : | sub height{ | ||
| 132 : | my $s = shift; | ||
| 133 : | 2*$s->{radius}; | ||
| 134 : | } | ||
| 135 : | sub width { | ||
| 136 : | my $s = shift; | ||
| 137 : | 2*$s->{radius}; | ||
| 138 : | } | ||
| 139 : | sub radius { | ||
| 140 : | my $s = shift; | ||
| 141 : | $s->{radius}; | ||
| 142 : | } | ||
| 143 : | sub x { | ||
| 144 : | my $s = shift; | ||
| 145 : | $s->{cx}; | ||
| 146 : | } | ||
| 147 : | sub y { | ||
| 148 : | my $s = shift; | ||
| 149 : | $s->{cy}; | ||
| 150 : | } | ||
| 151 : | sub image { | ||
| 152 : | my $s = shift; | ||
| 153 : | $s->{im}; | ||
| 154 : | } | ||
| 155 : | |||
| 156 : | sub draw{ | ||
| 157 : | my $self = shift; | ||
| 158 : | my $g = shift; # the enclosing graph object | ||
| 159 : | my $x = $self->x; | ||
| 160 : | my $y = $self->y; | ||
| 161 : | my $image = $self->image; | ||
| 162 : | my $height = $self->height; | ||
| 163 : | my $width = $self->width; | ||
| 164 : | $g->im->copy($image, | ||
| 165 : | ($g->ii($x)) - int($width/2), | ||
| 166 : | ($g->jj($y)) - int($height/2), | ||
| 167 : | 0, 0, $width, $height); | ||
| 168 : | } | ||
| 169 : | sub DESTROY { | ||
| 170 : | # doing nothing about destruction, hope that isn't dangerous | ||
| 171 : | } | ||
| 172 : | |||
| 173 : | 1; |
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