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
|
package Chart::Clicker::Renderer::StackedBar;
$Chart::Clicker::Renderer::StackedBar::VERSION = '2.90';
use Moose;
extends 'Chart::Clicker::Renderer';
# ABSTRACT: Stacked Bar renderer
use Graphics::Primitive::Brush;
use Graphics::Primitive::Paint::Solid;
use Graphics::Primitive::Operation::Fill;
use Graphics::Primitive::Operation::Stroke;
has '+additive' => ( default => 1 );
has 'bar_padding' => (
is => 'rw',
isa => 'Int',
default => 0
);
has 'bar_width' => (
is => 'rw',
isa => 'Num',
predicate => 'has_bar_width'
);
has 'brush' => (
is => 'rw',
isa => 'Graphics::Primitive::Brush',
default => sub { Graphics::Primitive::Brush->new }
);
has 'opacity' => (
is => 'rw',
isa => 'Num',
default => 0
);
override('prepare', sub {
my ($self) = @_;
super;
my $dses = $self->clicker->get_datasets_for_context($self->context);
foreach my $ds (@{ $dses }) {
if(!defined($self->{KEYCOUNT})) {
$self->{KEYCOUNT} = $ds->max_key_count;
}
$self->{SCOUNT} += $ds->count;
}
return 1;
});
override('finalize', sub {
my ($self) = @_;
my $clicker = $self->clicker;
my $height = $self->height;
my $width = $self->width;
my $dses = $clicker->get_datasets_for_context($self->context);
my $ctx = $clicker->get_context($dses->[0]->context);
my $domain = $ctx->domain_axis;
my $range = $ctx->range_axis;
my $padding = $self->bar_padding;
my $strokewidth = $self->brush->width;
$padding += $strokewidth;
my $bwidth;
if($self->has_bar_width) {
$bwidth = $self->bar_width;
} else {
$bwidth = int(($width - ($width * $domain->fudge_amount)
- ($padding / 2 * $self->{KEYCOUNT})) / ($self->{KEYCOUNT}));
}
my $hbwidth = $bwidth / 2;
# Fetch all the colors we'll need. Since we build each vertical bar from
# top to bottom, we'll need to change colors vertically.
for (my $i = 0; $i < $self->{SCOUNT}; $i++) {
push(@{ $self->{COLORS} }, $clicker->color_allocator->next);
}
my @keys = $dses->[0]->get_all_series_keys;
# Iterate over each key...
for (my $i = 0; $i < scalar(@keys); $i++) {
# Mark the x, since it's the same for each Y value
my $x = $domain->mark($width, $keys[$i]);
my $accum = 0;
# Get all the values from every dataset's series for each key
my @values;
foreach my $ds (@{ $dses }) {
push(@values, @{ $ds->get_series_values_for_key($keys[$i]) });
}
my $val = 0;
for my $j (0 .. $#values) {
my $sval = $values[$j];
# Skip this if there is no value for the specified key position
next if !defined($sval);
# Skip it if it's equal to our baseline, as there's no reason to
# draw anything if so
next if $sval == $range->baseline;
$val += $sval;
my $y = $range->mark($height, $val);
next unless defined($y);
$self->move_to($x - $hbwidth, $height - $y + $self->brush->width * 2);
$self->rectangle($bwidth, $y - $accum - 1);
# Accumulate the Y value, as it dictates how much we bump up the
# next bar.
$accum += $y - $accum;
my $color = $self->{COLORS}->[$j];
my $fillop = Graphics::Primitive::Operation::Fill->new(
paint => Graphics::Primitive::Paint::Solid->new
);
if($self->opacity) {
my $fillcolor = $color->clone;
$fillcolor->alpha($self->opacity);
$fillop->paint->color($fillcolor);
# Since we're going to stroke this, we want to preserve it.
$fillop->preserve(1);
} else {
$fillop->paint->color($color);
}
$self->do($fillop);
if($self->opacity) {
my $strokeop = Graphics::Primitive::Operation::Stroke->new;
$strokeop->brush->color($color);
$self->do($strokeop);
}
}
}
return 1;
});
__PACKAGE__->meta->make_immutable;
no Moose;
1;
__END__
=pod
=head1 NAME
Chart::Clicker::Renderer::StackedBar - Stacked Bar renderer
=head1 VERSION
version 2.90
=head1 SYNOPSIS
my $br = Chart::Clicker::Renderer::Bar->new;
=head1 DESCRIPTION
Chart::Clicker::Renderer::StackedBar renders a dataset as stacked bars.
=for HTML <p><img src="http://gphat.github.com/chart-clicker/static/images/examples/stacked-bar.png" width="500" height="250" alt="Stacked Bar Chart" /></p>
=head1 ATTRIBUTES
=head2 bar_padding
How much padding to put around a bar. A padding of 4 will result in 2 pixels
on each side.
=head2 bar_width
Allows you to override the calculation that determines the optimal width for
bars. Be careful using this as it can making things look terrible.
=head2 brush
A L<brush|Graphics::Primitive::Brush> to stroke on each bar.
=head2 opacity
If true this value will be used when setting the opacity of the bar's fill.
=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
|
