From Patrick Michaud:
[imager-graph.git] / lib / Imager / Graph / Horizontal.pm
CommitLineData
f0b01a81 1package Imager::Graph::Horizontal;
2
3=head1 NAME
4
5 Imager::Graph::Horizontal - A super class for line/bar charts
6
7=cut
8
9use strict;
10use vars qw(@ISA);
11use Imager::Graph;
12@ISA = qw(Imager::Graph);
13
14use constant STARTING_MIN_VALUE => 99999;
15
16=over 4
17
18=item add_data_series(\@data, $series_name)
19
20Add a data series to the graph, of the default type.
21
22=cut
23
24sub add_data_series {
25 my $self = shift;
26 my $data_ref = shift;
27 my $series_name = shift;
28
29 my $series_type = $self->_get_default_series_type();
30 $self->_add_data_series($series_type, $data_ref, $series_name);
31
32 return;
33}
34
35=item add_column_data_series(\@data, $series_name)
36
37Add a column data series to the graph.
38
39=cut
40
41sub add_column_data_series {
42 my $self = shift;
43 my $data_ref = shift;
44 my $series_name = shift;
45
46 $self->_add_data_series('column', $data_ref, $series_name);
47
48 return;
49}
50
51=item add_line_data_series(\@data, $series_name)
52
53Add a line data series to the graph.
54
55=cut
56
57sub add_line_data_series {
58 my $self = shift;
59 my $data_ref = shift;
60 my $series_name = shift;
61
62 $self->_add_data_series('line', $data_ref, $series_name);
63
64 return;
65}
66
67=item set_column_padding($int)
68
69Sets the number of pixels that should go between columns of data.
70
71=cut
72
73sub set_column_padding {
74 $_[0]->{'custom_style'}->{'column_padding'} = $_[1];
75}
76
77=item set_negative_background($color)
78
79Sets the background color used below the x axis.
80
81=cut
82
83sub set_negative_background {
84 $_[0]->{'custom_style'}->{'negative_bg'} = $_[1];
85}
86
87=item draw()
88
89Draw the graph
90
91=cut
92
93sub draw {
94 my ($self, %opts) = @_;
95
96 if (!$self->_valid_input()) {
97 return;
98 }
99
100 $self->_style_setup(\%opts);
101
102 my $style = $self->{_style};
103
104 my $img = $self->_get_image()
105 or return;
106
107 my @image_box = ( 0, 0, $img->getwidth-1, $img->getheight-1 );
108 $self->_set_image_box(\@image_box);
109
110 my @chart_box = ( 0, 0, $img->getwidth-1, $img->getheight-1 );
111 $self->_draw_legend(\@chart_box);
112 if ($style->{title}{text}) {
113 $self->_draw_title($img, \@chart_box)
114 or return;
115 }
116
117 # Scale the graph box down to the widest graph that can cleanly hold the # of columns.
118 return unless $self->_get_data_range();
119 $self->_remove_tics_from_chart_box(\@chart_box);
120 my $column_count = $self->_get_column_count();
121
122 my $width = $self->_get_number('width');
123 my $height = $self->_get_number('height');
124
125 my $graph_width = $chart_box[2] - $chart_box[0];
126 my $graph_height = $chart_box[3] - $chart_box[1];
127
128 my $col_height = int(($graph_height - 1) / $column_count) -1;
129 $graph_height = $col_height * $column_count + 1;
130
131 my $tic_count = $self->_get_x_tics();
132 my $tic_distance = int(($graph_width -1) / ($tic_count - 1));
133 $graph_width = $tic_distance * ($tic_count - 1);
134
135 my $bottom = $chart_box[1];
136 my $left = $chart_box[0];
137
138 $self->{'_style'}{'graph_width'} = $graph_width;
139 $self->{'_style'}{'graph_height'} = $graph_height;
140
141 my @graph_box = ($left, $bottom, $left + $graph_width, $bottom + $graph_height);
142 $self->_set_graph_box(\@graph_box);
143
144 $img->box(
145 color => $self->_get_color('outline.line'),
146 xmin => $left,
147 xmax => $left+$graph_width,
148 ymin => $bottom,
149 ymax => $bottom+$graph_height,
150 );
151
152 $img->box(
153 color => $self->_get_color('bg'),
154 xmin => $left + 1,
155 xmax => $left+$graph_width - 1,
156 ymin => $bottom + 1,
157 ymax => $bottom+$graph_height-1 ,
158 filled => 1,
159 );
160
161 my $min_value = $self->_get_min_value();
162 my $max_value = $self->_get_max_value();
163 my $value_range = $max_value - $min_value;
164
165 my $zero_position;
166 if ($value_range) {
167 $zero_position = $left + (-1*$min_value / $value_range) * ($graph_width-1);
168 }
169
170 if ($min_value < 0) {
171 $img->box(
172 color => $self->_get_color('negative_bg'),
173 xmin => $left+1,
174 xmax => $zero_position,
175 ymin => $bottom+1,
176 ymax => $bottom+$graph_height - 1,
177 filled => 1,
178 );
179 $img->line(
180 x1 => $zero_position,
181 y1 => $bottom,
182 x2 => $zero_position,
183 y2 => $bottom + $graph_height,
184 color => $self->_get_color('outline.line'),
185 );
186 }
187
188 if ($self->_get_data_series()->{'bar'}) {
189 $self->_draw_bars();
190 }
191
192 if ($self->_get_x_tics()) {
193 $self->_draw_x_tics();
194 }
195 if ($self->_get_labels()) {
196 $self->_draw_y_tics();
197 }
198
199 return $self->_get_image();
200}
201
202sub _get_data_range {
203 my $self = shift;
204
205 my $max_value = 0;
206 my $min_value = 0;
207 my $column_count = 0;
208
209 my ($b_min, $b_max, $b_cols) = $self->_get_bar_range();
210
211 $min_value = $b_min;
212 $max_value = $b_max;
213 $column_count = $b_cols;
214# $min_value = $self->_min(STARTING_MIN_VALUE, $c_min, $l_min);
215# $max_value = $self->_max(0, $sc_max, $c_max, $l_max);
216
217 if ($self->_get_number('automatic_axis')) {
218 # In case this was set via a style, and not by the api method
219 eval { require Chart::Math::Axis; };
220 if ($@) {
221 return $self->_error("Can't use automatic_axis - $@");
222 }
223
224 my $axis = Chart::Math::Axis->new();
225 $axis->include_zero();
226 $axis->add_data($min_value, $max_value);
227 $max_value = $axis->top;
228 $min_value = $axis->bottom;
229 my $ticks = $axis->ticks;
230 # The +1 is there because we have the bottom tick as well
231 $self->set_x_tics($ticks+1);
232 }
233
234 $self->_set_max_value($max_value);
235 $self->_set_min_value($min_value);
236 $self->_set_column_count($column_count);
237
238 return 1;
239}
240
241sub _min {
242 my $self = shift;
243 my $min = shift;
244
245 foreach my $value (@_) {
246 next unless defined $value;
247 if ($value < $min) { $min = $value; }
248 }
249 return $min;
250}
251
252sub _max {
253 my $self = shift;
254 my $min = shift;
255
256 foreach my $value (@_) {
257 next unless defined $value;
258 if ($value > $min) { $min = $value; }
259 }
260 return $min;
261}
262
263sub _get_bar_range {
264 my $self = shift;
265
266 my $series = $self->_get_data_series()->{'bar'};
267 return (undef, undef, 0) unless $series;
268
269 my $max_value = 0;
270 my $min_value = STARTING_MIN_VALUE;
271 my $column_count = 0;
272
273 my @series = @{$series};
274 foreach my $series (@series) {
275 my @data = @{$series->{'data'}};
276
277 foreach my $value (@data) {
278 $column_count++;
279 if ($value > $max_value) { $max_value = $value; }
280 if ($value < $min_value) { $min_value = $value; }
281 }
282 }
283
284 return ($min_value, $max_value, $column_count);
285}
286
287
288sub _draw_legend {
289 my $self = shift;
290 my $chart_box = shift;
291 my $style = $self->{'_style'};
292
293 my @labels;
294 my $img = $self->_get_image();
295 if (my $series = $self->_get_data_series()->{'bar'}) {
296 push @labels, map { $_->{'series_name'} } @$series;
297 }
298
299 if ($style->{features}{legend} && (scalar @labels)) {
300 $self->SUPER::_draw_legend($self->_get_image(), \@labels, $chart_box)
301 or return;
302 }
303 return;
304}
305
306sub _draw_flat_legend {
307 return 1;
308}
309
310sub _draw_lines {
311 my $self = shift;
312 my $style = $self->{'_style'};
313
314 my $img = $self->_get_image();
315
316 my $max_value = $self->_get_max_value();
317 my $min_value = $self->_get_min_value();
318 my $column_count = $self->_get_column_count();
319
320 my $value_range = $max_value - $min_value;
321
322 my $width = $self->_get_number('width');
323 my $height = $self->_get_number('height');
324
325 my $graph_width = $self->_get_number('graph_width');
326 my $graph_height = $self->_get_number('graph_height');
327
328 my $line_series = $self->_get_data_series()->{'line'};
329 my $series_counter = $self->_get_series_counter() || 0;
330
331 my $has_columns = (defined $self->_get_data_series()->{'column'} || $self->_get_data_series->{'stacked_column'}) ? 1 : 0;
332
333 my $col_width = int($graph_width / $column_count) -1;
334
335 my $graph_box = $self->_get_graph_box();
336 my $left = $graph_box->[0] + 1;
337 my $bottom = $graph_box->[1];
338
339 my $zero_position = $bottom + $graph_height - (-1*$min_value / $value_range) * ($graph_height - 1);
340
341
342 my $line_aa = $self->_get_number("lineaa");
343 foreach my $series (@$line_series) {
344 my @data = @{$series->{'data'}};
345 my $data_size = scalar @data;
346
347 my $interval;
348 if ($has_columns) {
349 $interval = $graph_width / ($data_size);
350 }
351 else {
352 $interval = $graph_width / ($data_size - 1);
353 }
354 my $color = $self->_data_color($series_counter);
355
356 # We need to add these last, otherwise the next line segment will overwrite half of the marker
357 my @marker_positions;
358 for (my $i = 0; $i < $data_size - 1; $i++) {
359 my $x1 = $left + $i * $interval;
360 my $x2 = $left + ($i + 1) * $interval;
361
362 $x1 += $has_columns * $interval / 2;
363 $x2 += $has_columns * $interval / 2;
364
365 my $y1 = $bottom + ($value_range - $data[$i] + $min_value)/$value_range * $graph_height;
366 my $y2 = $bottom + ($value_range - $data[$i + 1] + $min_value)/$value_range * $graph_height;
367
368 push @marker_positions, [$x1, $y1];
369 $img->line(x1 => $x1, y1 => $y1, x2 => $x2, y2 => $y2, aa => $line_aa, color => $color) || die $img->errstr;
370 }
371
372 my $x2 = $left + ($data_size - 1) * $interval;
373 $x2 += $has_columns * $interval / 2;
374
375 my $y2 = $bottom + ($value_range - $data[$data_size - 1] + $min_value)/$value_range * $graph_height;
376
377 push @marker_positions, [$x2, $y2];
378 foreach my $position (@marker_positions) {
379 $self->_draw_line_marker($position->[0], $position->[1], $series_counter);
380 }
381 $series_counter++;
382 }
383
384 $self->_set_series_counter($series_counter);
385 return;
386}
387
388sub _line_marker {
389 my ($self, $index) = @_;
390
391 my $markers = $self->{'_style'}{'line_markers'};
392 if (!$markers) {
393 return;
394 }
395 my $marker = $markers->[$index % @$markers];
396
397 return $marker;
398}
399
400sub _draw_line_marker {
401 my $self = shift;
402 my ($x1, $y1, $series_counter) = @_;
403
404 my $img = $self->_get_image();
405
406 my $style = $self->_line_marker($series_counter);
407 return unless $style;
408
409 my $type = $style->{'shape'};
410 my $radius = $style->{'radius'};
411
412 my $line_aa = $self->_get_number("lineaa");
413 my $fill_aa = $self->_get_number("fill.aa");
414 if ($type eq 'circle') {
415 my @fill = $self->_data_fill($series_counter, [$x1 - $radius, $y1 - $radius, $x1 + $radius, $y1 + $radius]);
416 $img->circle(x => $x1, y => $y1, r => $radius, aa => $fill_aa, filled => 1, @fill);
417 }
418 elsif ($type eq 'square') {
419 my @fill = $self->_data_fill($series_counter, [$x1 - $radius, $y1 - $radius, $x1 + $radius, $y1 + $radius]);
420 $img->box(xmin => $x1 - $radius, ymin => $y1 - $radius, xmax => $x1 + $radius, ymax => $y1 + $radius, @fill);
421 }
422 elsif ($type eq 'diamond') {
423 # The gradient really doesn't work for diamond
424 my $color = $self->_data_color($series_counter);
425 $img->polygon(
426 points => [
427 [$x1 - $radius, $y1],
428 [$x1, $y1 + $radius],
429 [$x1 + $radius, $y1],
430 [$x1, $y1 - $radius],
431 ],
432 filled => 1, color => $color, aa => $fill_aa);
433 }
434 elsif ($type eq 'triangle') {
435 # The gradient really doesn't work for triangle
436 my $color = $self->_data_color($series_counter);
437 $img->polygon(
438 points => [
439 [$x1 - $radius, $y1 + $radius],
440 [$x1 + $radius, $y1 + $radius],
441 [$x1, $y1 - $radius],
442 ],
443 filled => 1, color => $color, aa => $fill_aa);
444
445 }
446 elsif ($type eq 'x') {
447 my $color = $self->_data_color($series_counter);
448 $img->line(x1 => $x1 - $radius, y1 => $y1 -$radius, x2 => $x1 + $radius, y2 => $y1+$radius, aa => $line_aa, color => $color) || die $img->errstr;
449 $img->line(x1 => $x1 + $radius, y1 => $y1 -$radius, x2 => $x1 - $radius, y2 => $y1+$radius, aa => $line_aa, color => $color) || die $img->errstr;
450 }
451 elsif ($type eq 'plus') {
452 my $color = $self->_data_color($series_counter);
453 $img->line(x1 => $x1, y1 => $y1 -$radius, x2 => $x1, y2 => $y1+$radius, aa => $line_aa, color => $color) || die $img->errstr;
454 $img->line(x1 => $x1 + $radius, y1 => $y1, x2 => $x1 - $radius, y2 => $y1, aa => $line_aa, color => $color) || die $img->errstr;
455 }
456}
457
458sub _draw_bars {
459 my $self = shift;
460 my $style = $self->{'_style'};
461
462 my $img = $self->_get_image();
463
464 my $max_value = $self->_get_max_value();
465 my $min_value = $self->_get_min_value();
466 my $column_count = $self->_get_column_count();
467
468 my $value_range = $max_value - $min_value;
469
470 my $width = $self->_get_number('width');
471 my $height = $self->_get_number('height');
472
473 my $graph_width = $self->_get_number('graph_width');
474 my $graph_height = $self->_get_number('graph_height');
475
476
477 my $graph_box = $self->_get_graph_box();
478 my $bottom = $graph_box->[1] + 1;
479 my $left = $graph_box->[0];
480
481 my $zero_position = int($left + (-1*$min_value / $value_range) * ($graph_width-1));
482
483 my $bar_height = int($graph_height / $column_count - 1);
484
485 my $outline_color;
486 if ($style->{'features'}{'outline'}) {
487 $outline_color = $self->_get_color('outline.line');
488 }
489
490 my $series_counter = $self->_get_series_counter() || 0;
491 my $col_series = $self->_get_data_series()->{'bar'};
492 my $column_padding = $self->_get_number('column_padding') || 0;
493
494 # This tracks the series we're in relative to the starting series - this way colors stay accurate, but the columns don't start out too far to the right.
495 my $column_series = 0;
496
497 for (my $series_pos = 0; $series_pos < scalar @$col_series; $series_pos++) {
498 my $series = $col_series->[$series_pos];
499 my @data = @{$series->{'data'}};
500 my $data_size = scalar @data;
f0b01a81 501 for (my $i = 0; $i < $data_size; $i++) {
502
503 my $y1 = int($bottom + $bar_height * (scalar @$col_series * $i + $series_pos)) + scalar @$col_series * $i + $series_pos + ($column_padding / 2);
504
505 my $y2 = $y1 + $bar_height - $column_padding;
506
507 my $x1 = int($left - ($min_value - $data[$i]) / $value_range * $graph_width);
508
509 my $color = $self->_data_color($series_counter);
510
f0b01a81 511 if ($data[$i] > 0) {
7422650e 512 my @fill = $self->_data_fill($series_counter, [$zero_position+1, $y1, $x1, $y2]);
513 $img->box(xmax => $x1, xmin => $zero_position+1, ymin => $y1, ymax => $y2, @fill);
f0b01a81 514 if ($style->{'features'}{'outline'}) {
515 $img->box(xmax => $x1, xmin => $zero_position, ymin => $y1, ymax => $y2, color => $outline_color);
516 }
517 }
518 elsif ($data[$i] == 0) {
519 }
520 else {
7422650e 521 my @fill = $self->_data_fill($series_counter, [$x1, $y1, $zero_position, $y2]);
522 $img->box(xmax => $zero_position , xmin => $x1, ymin => $y1, ymax => $y2, @fill);
f0b01a81 523 if ($style->{'features'}{'outline'}) {
524 $img->box(xmax => $zero_position, xmin => $x1, ymin => $y1, ymax => $y2, color => $outline_color);
525 }
526 }
527 }
528
529 $series_counter++;
530 $column_series++;
531 }
532 $self->_set_series_counter($series_counter);
533 return;
534}
535
536sub _add_data_series {
537 my $self = shift;
538 my $series_type = shift;
539 my $data_ref = shift;
540 my $series_name = shift;
541
542 my $graph_data = $self->{'graph_data'} || {};
543
544 my $series = $graph_data->{$series_type} || [];
545
546 push @$series, { data => $data_ref, series_name => $series_name };
547
548 $graph_data->{$series_type} = $series;
549
550 $self->{'graph_data'} = $graph_data;
551 return;
552}
553
554=over
555
556=item show_vertical_gridlines()
557
558Shows vertical gridlines at the y-tics.
559
560=cut
561
562sub show_vertical_gridlines {
563 $_[0]->{'custom_style'}->{'vertical_gridlines'} = 1;
564}
565
566=item use_automatic_axis()
567
568Automatically scale the Y axis, based on L<Chart::Math::Axis>. If Chart::Math::Axis isn't installed, this sets an error and returns undef. Returns 1 if it is installed.
569
570=cut
571
572sub use_automatic_axis {
573 eval { require Chart::Math::Axis; };
574 if ($@) {
575 return $_[0]->_error("use_automatic_axis - $@\nCalled from ".join(' ', caller)."\n");
576 }
577 $_[0]->{'custom_style'}->{'automatic_axis'} = 1;
578 return 1;
579}
580
581
582=item set_x_tics($count)
583
584Set the number of X tics to use. Their value and position will be determined by the data range.
585
586=cut
587
588sub set_x_tics {
589 $_[0]->{'x_tics'} = $_[1];
590}
591
592sub _get_x_tics {
593 return $_[0]->{'x_tics'} || 0;
594}
595
596sub _remove_tics_from_chart_box {
597 my $self = shift;
598 my $chart_box = shift;
599
600 # XXX - bad default
601 my $tic_width = $self->_get_y_tic_width() || 10;
602 my @y_tic_box = ($chart_box->[0], $chart_box->[1], $chart_box->[0] + $tic_width, $chart_box->[3]);
603
604 # XXX - bad default
605 my $tic_height = $self->_get_x_tic_height() || 10;
606 my @x_tic_box = ($chart_box->[0], $chart_box->[3] - $tic_height, $chart_box->[2], $chart_box->[3]);
607
608 $self->_remove_box($chart_box, \@y_tic_box);
609 $self->_remove_box($chart_box, \@x_tic_box);
610
611 # If there's no title, the y-tics will be part off-screen. Half of the x-tic height should be more than sufficient.
612 my @y_tic_tops = ($chart_box->[0], $chart_box->[1], $chart_box->[2], $chart_box->[1] + int($tic_height / 2));
613 $self->_remove_box($chart_box, \@y_tic_tops);
614
615}
616
617sub _get_y_tic_width {
618 my $self = shift;
619
620 my $labels = $self->_get_labels();
621 my $max_width = 0;
622 foreach my $label (@$labels) {
623 my @box = $self->_text_bbox($label, 'legend');
624 my $width = $box[2] + 5;
625 # For the tic itself...
626 $width += 10;
627 if ($width > $max_width) {
628 $max_width = $width;
629 }
630 }
631 return $max_width;
632}
633
634sub _get_x_tic_height {
635 my $self = shift;
636
637 my $min = $self->_get_min_value();
638 my $max = $self->_get_max_value();
639 my $tic_count = $self->_get_x_tics();
640
641 my $interval = ($max - $min) / ($tic_count - 1);
642
643 my %text_info = $self->_text_style('legend')
644 or return;
645
646 my $max_height = 0;
647 for my $count (0 .. $tic_count - 1) {
648 my $value = sprintf("%.2f", ($count*$interval)+$min);
649
650 my @box = $self->_text_bbox($value, 'legend');
651 my $height = $box[3] - $box[1];
652
653 # For the tic width
654 $height += 10;
655 if ($height > $max_height) {
656 $max_height = $height;
657 }
658 }
659
660
661 return $max_height;
662}
663
664sub _draw_y_tics {
665 my $self = shift;
666
667 my $img = $self->_get_image();
668 my $graph_box = $self->_get_graph_box();
669 my $image_box = $self->_get_image_box();
670
671 my $labels = $self->_get_labels();
672
673 my $tic_count = (scalar @$labels) - 1;
674
675 my $has_columns = defined $self->_get_data_series()->{'bar'};
676
677 # If we have columns, we want the x-ticks to show up in the middle of the column, not on the left edge
678 my $denominator = $tic_count;
679 if ($has_columns) {
680 $denominator ++;
681 }
682 my $tic_distance = ($graph_box->[3] - $graph_box->[1]) / ($denominator);
683 my %text_info = $self->_text_style('legend')
684 or return;
685
686 for my $count (0 .. $tic_count) {
687 my $label = $labels->[$count];
688
689 my $x1 = $graph_box->[0] - 5;
690 my $x2 = $graph_box->[0] + 5;
691
692 my $y1 = $graph_box->[1] + ($tic_distance * $count);
693
694 if ($has_columns) {
695 $y1 += $tic_distance / 2;
696 }
697
698 $img->line(x1 => $x1, x2 => $x2, y1 => $y1, y2 => $y1, aa => 1, color => '000000');
699
700 my @box = $self->_text_bbox($label, 'legend')
701 or return;
702
703 my $width = $box[2];
704 my $height = $box[3];
705
706 $img->string(%text_info,
707 x => ($x1 - ($width + 5)),
708 y => ($y1 + ($height / 2)),
709 text => $label
710 );
711
712 }
713
714}
715
716sub _draw_x_tics {
717 my $self = shift;
718
719 my $img = $self->_get_image();
720 my $graph_box = $self->_get_graph_box();
721 my $image_box = $self->_get_image_box();
722
723 my $tic_count = $self->_get_x_tics();
724 my $min = $self->_get_min_value();
725 my $max = $self->_get_max_value();
726 my $interval = ($max - $min) / ($tic_count - 1);
727
728 # If we have columns, we want the x-ticks to show up in the middle of the column, not on the left edge
729 my $tic_distance = ($graph_box->[2] - $graph_box->[0]) / ($tic_count -1);
730
731 my %text_info = $self->_text_style('legend')
732 or return;
733
734 my $show_gridlines = $self->_get_number('vertical_gridlines');
735 for my $count (0 .. $tic_count-1) {
736 my $x1 = $graph_box->[0] + ($tic_distance * $count);
737
738 my $y1 = $graph_box->[3] + 5;
739 my $y2 = $graph_box->[3] - 5;
740
741 my $value = ($count*$interval)+$min;
742
743 $img->line(x1 => $x1, x2 => $x1, y1 => $y1, y2 => $y2, aa => 1, color => '000000');
744
745 my @box = $self->_text_bbox($value, 'legend')
746 or return;
747
748 my $width = $box[2];
749 my $height = $box[3];
750
751 $img->string(%text_info,
752 x => ($x1 - ($width / 2)),
753 y => ($y1 + $height + 5),
754 text => $value
755 );
756
757 if ($show_gridlines) {
758 # XXX - line styles!
759 for (my $i = $graph_box->[1]; $i < $graph_box->[3]; $i += 6) {
760 my $y1 = $i;
761 my $y2 = $i + 2;
762 if ($y2 > $graph_box->[3]) { $y2 = $graph_box->[3]; }
763 $img->line(x1 => $x1, x2 => $x1, y1 => $y1, y2 => $y2, aa => 1, color => '000000');
764 }
765 }
766 }
767}
768
769sub _valid_input {
770 my $self = shift;
771
772 if (!defined $self->_get_data_series() || !keys %{$self->_get_data_series()}) {
773 return $self->_error("No data supplied");
774 }
775
776 my $data = $self->_get_data_series();
777 if (defined $data->{'line'} && !scalar @{$data->{'line'}->[0]->{'data'}}) {
778 return $self->_error("No values in data series");
779 }
780 if (defined $data->{'column'} && !scalar @{$data->{'column'}->[0]->{'data'}}) {
781 return $self->_error("No values in data series");
782 }
783 if (defined $data->{'stacked_column'} && !scalar @{$data->{'stacked_column'}->[0]->{'data'}}) {
784 return $self->_error("No values in data series");
785 }
786
787 return 1;
788}
789
790sub _set_column_count { $_[0]->{'column_count'} = $_[1]; }
791sub _set_min_value { $_[0]->{'min_value'} = $_[1]; }
792sub _set_max_value { $_[0]->{'max_value'} = $_[1]; }
793sub _set_image_box { $_[0]->{'image_box'} = $_[1]; }
794sub _set_graph_box { $_[0]->{'graph_box'} = $_[1]; }
795sub _set_series_counter { $_[0]->{'series_counter'} = $_[1]; }
796sub _get_column_count { return $_[0]->{'column_count'} }
797sub _get_min_value { return $_[0]->{'min_value'} }
798sub _get_max_value { return $_[0]->{'max_value'} }
799sub _get_image_box { return $_[0]->{'image_box'} }
800sub _get_graph_box { return $_[0]->{'graph_box'} }
801sub _get_series_counter { return $_[0]->{'series_counter'} }
802
8031;
804