1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
package Chart::Clicker::Renderer::PolarArea;
$Chart::Clicker::Renderer::PolarArea::VERSION = '2.90';
use Moose;
extends 'Chart::Clicker::Renderer';
# ABSTRACT: Polar Area renderer
use Graphics::Color::RGB;
use Geometry::Primitive::Arc;
use Graphics::Primitive::Brush;
use Scalar::Util qw(refaddr);
has 'border_color' => (
is => 'rw',
isa => 'Graphics::Color::RGB',
default => sub { Graphics::Color::RGB->new },
);
has 'brush' => (
is => 'rw',
isa => 'Graphics::Primitive::Brush',
default => sub { Graphics::Primitive::Brush->new }
);
has '_accum' => (
is => 'rw',
isa => 'ArrayRef',
default => sub { [] }
);
has '_colors' => (
is => 'rw',
isa => 'ArrayRef',
default => sub { [] }
);
has '_largest' => (
is => 'rw',
isa => 'Num',
default => 0
);
my $TO_RAD = (4 * atan2(1, 1)) / 180;
override('prepare', sub {
my $self = shift;
super;
my $clicker = $self->clicker;
# TODO
# This implementation is dumb... the better way would be:
# draw the first slice
# remember once of the corner points
# when drawing the next slice, start at the remembered point and arc-neg with no radius
# then arc pos again
# or something like that
# This is really hinky, basically since figuring out the arcs and whatnot
# is a pain in the ass, we employ the painter's algorithm and draw
# the last series first, then paint the next one over it. As such, we have
# to know the total "accumulated" value for each series' position so that
# we can decrement it on each run through the series... this finds the
# totals
my $dses = $clicker->get_datasets_for_context($self->context);
foreach my $ds (@{ $dses }) {
my $lvs = $ds->largest_value_slice;
if($lvs > $self->_largest) {
$self->_largest($lvs)
}
my $count = $ds->max_key_count;
for my $pos (0..$count - 1) {
my $vals = $ds->get_series_values($pos);
my $total = 0;
foreach my $v (@{ $vals }) {
$total += $v;
}
$self->_accum->[$pos] += $total;
}
}
});
override('finalize', sub {
my $self = shift;
my $clicker = $self->clicker;
my $radius = $self->height;
if($self->width < $self->height) {
$radius = $self->width;
}
$radius = $radius / 2;
# Take into account the line around the edge when working out the radius
$radius -= $self->brush->width;
my $height = $self->height;
my $linewidth = 1;
my $midx = $self->width / 2;
my $midy = $height / 2;
my $per = $radius / $self->_largest;
my $dses = $clicker->get_datasets_for_context($self->context);
foreach my $ds (@{ $dses }) {
foreach my $series (@{ $ds->series }) {
push(@{ $self->_colors }, $clicker->color_allocator->next);
}
}
# my $dses = $clicker->get_datasets_for_context($self->context);
foreach my $ds (reverse @{ $dses }) {
my $ctx = $clicker->get_context($ds->context);
my $domain = $ctx->domain_axis;
my $range = $ctx->range_axis;
foreach my $series (reverse @{ $ds->series }) {
my $pos = 0;
my $degs = 360 / scalar(@{ $series->values });
my $color = pop(@{ $self->_colors });
my $v = 0;
foreach my $val (@{ $series->values }) {
my $foo = $self->_accum->[$v];
# Remove this value worth of accumulate from the accumulator
# so that our size is properly pushed out, see above comment
# in prepare...
$self->_accum->[$v] -= $val;
$self->move_to($midx, $midy);
$self->arc(($self->_accum->[$v] + $val) * $per, ($pos - $degs) * $TO_RAD, $pos * $TO_RAD);
$self->close_path;
my $fop = Graphics::Primitive::Operation::Fill->new(
preserve => 1,
paint => Graphics::Primitive::Paint::Solid->new(
color => $color,
)
);
$self->do($fop);
my $op = Graphics::Primitive::Operation::Stroke->new;
$op->brush($self->brush->clone);
$op->brush->color($self->border_color);
$self->do($op);
$pos += $degs;
$v++;
}
}
}
return 1;
});
__PACKAGE__->meta->make_immutable;
no Moose;
1;
__END__
=pod
=head1 NAME
Chart::Clicker::Renderer::PolarArea - Polar Area renderer
=head1 VERSION
version 2.90
=head1 SYNOPSIS
my $par = Chart::Clicker::Renderer::PolarArea->new;
# Optionally set the stroke
$par->brush->width(2);
# and color
$par->border_color(Graphics::Color::RGB->new(red => 1, green => 1, blue => 1));
=head1 DESCRIPTION
Chart::Clicker::Renderer::PolarArea renders each series as a slice of a pie.
The values of the series determine the radius of each slice, with larger
values making the slices longer. The 360 degrees of pie is divided equally.
=for HTML <p><img src=http://gphat.github.com/chart-clicker/static/images/examples/polararea.png" width="300" height="250" alt="Polar Area Chart" /></p>
=head1 ATTRIBUTES
=head2 border_color
Set/Get the L<color|Graphics::Color::RGB> to use for the border.
=head2 brush
Set/Get a L<brush|Graphics::Primitive::Brush> to be used for the polar area's borders, which are around
each slice.
=head1 AUTHOR
Cory G Watson <gphat@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2016 by Cory G Watson.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
|
