[rt #59532] allow negative_bg to be a fill for vertical charts
[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
86f73dc2 35=item add_bar_data_series(\@data, $series_name)
f0b01a81 36
86f73dc2 37Add a bar data series to the graph.
f0b01a81 38
39=cut
40
86f73dc2 41sub add_bar_data_series {
f0b01a81 42 my $self = shift;
43 my $data_ref = shift;
44 my $series_name = shift;
45
86f73dc2 46 $self->_add_data_series('bar', $data_ref, $series_name);
f0b01a81 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
56b495c0
TC
104 $self->_make_img
105 or return;
106
f0b01a81 107 my $img = $self->_get_image()
108 or return;
109
110 my @image_box = ( 0, 0, $img->getwidth-1, $img->getheight-1 );
111 $self->_set_image_box(\@image_box);
112
113 my @chart_box = ( 0, 0, $img->getwidth-1, $img->getheight-1 );
114 $self->_draw_legend(\@chart_box);
115 if ($style->{title}{text}) {
116 $self->_draw_title($img, \@chart_box)
117 or return;
118 }
119
120 # Scale the graph box down to the widest graph that can cleanly hold the # of columns.
121 return unless $self->_get_data_range();
86f73dc2 122 $self->_remove_tics_from_chart_box(\@chart_box, \%opts);
f0b01a81 123 my $column_count = $self->_get_column_count();
124
125 my $width = $self->_get_number('width');
126 my $height = $self->_get_number('height');
127
128 my $graph_width = $chart_box[2] - $chart_box[0];
129 my $graph_height = $chart_box[3] - $chart_box[1];
130
95289584 131 my $col_height = ($graph_height - 1) / $column_count;
132 if ($col_height > 1) {
133 $graph_height = int($col_height) * $column_count + 1;
134 }
135 else {
136 $graph_height = $col_height * $column_count + 1;
137 }
f0b01a81 138
139 my $tic_count = $self->_get_x_tics();
140 my $tic_distance = int(($graph_width -1) / ($tic_count - 1));
141 $graph_width = $tic_distance * ($tic_count - 1);
142
86f73dc2 143 my $top = $chart_box[1];
f0b01a81 144 my $left = $chart_box[0];
145
146 $self->{'_style'}{'graph_width'} = $graph_width;
147 $self->{'_style'}{'graph_height'} = $graph_height;
148
86f73dc2
TC
149 my @graph_box = ($left, $top, $left + $graph_width, $top + $graph_height);
150
f0b01a81 151 $self->_set_graph_box(\@graph_box);
152
86f73dc2
TC
153 my @fill_box = @graph_box;
154
155 if ($self->_feature_enabled("graph_outline")) {
156 my @line = $self->_get_line("graph.outline")
157 or return;
158
159 $self->_box(
160 @line,
161 box => \@fill_box,
162 img => $img,
163 );
164 ++$fill_box[0];
165 ++$fill_box[1];
166 --$fill_box[2];
167 --$fill_box[3];
168 }
f0b01a81 169
170 $img->box(
86f73dc2
TC
171 $self->_get_fill("graph.fill"),
172 box => \@fill_box,
173 );
f0b01a81 174
175 my $min_value = $self->_get_min_value();
176 my $max_value = $self->_get_max_value();
177 my $value_range = $max_value - $min_value;
178
179 my $zero_position;
180 if ($value_range) {
267997be 181 $zero_position = $left + $graph_width + (-1*$min_value / $value_range) * ($graph_width-1);
f0b01a81 182 }
183
184 if ($min_value < 0) {
185 $img->box(
186 color => $self->_get_color('negative_bg'),
187 xmin => $left+1,
188 xmax => $zero_position,
86f73dc2
TC
189 ymin => $top+1,
190 ymax => $top+$graph_height - 1,
f0b01a81 191 filled => 1,
192 );
193 $img->line(
194 x1 => $zero_position,
86f73dc2 195 y1 => $top,
f0b01a81 196 x2 => $zero_position,
86f73dc2 197 y2 => $top + $graph_height,
f0b01a81 198 color => $self->_get_color('outline.line'),
199 );
200 }
201
86f73dc2
TC
202 $self->_reset_series_counter();
203
f0b01a81 204 if ($self->_get_data_series()->{'bar'}) {
205 $self->_draw_bars();
206 }
09bdc58c 207 if ($self->_get_data_series()->{'line'}) {
208 $self->_draw_lines();
209 }
f0b01a81 210
211 if ($self->_get_x_tics()) {
212 $self->_draw_x_tics();
213 }
86f73dc2
TC
214 if ($self->_get_labels(\%opts)) {
215 $self->_draw_y_tics(\%opts);
f0b01a81 216 }
217
218 return $self->_get_image();
219}
220
221sub _get_data_range {
222 my $self = shift;
223
224 my $max_value = 0;
225 my $min_value = 0;
226 my $column_count = 0;
227
228 my ($b_min, $b_max, $b_cols) = $self->_get_bar_range();
09bdc58c 229 my ($l_min, $l_max, $l_cols) = $self->_get_line_range();
f0b01a81 230
09bdc58c 231 $min_value = $self->_min(STARTING_MIN_VALUE, $b_min, $l_min);
232 $max_value = $self->_max(0, $b_max, $l_max);
233 $column_count = $self->_max(0, $b_cols, $l_cols);
267997be 234
235 my $config_min = $self->_get_number('x_min');
236 my $config_max = $self->_get_number('x_max');
237
238 if (defined $config_max && $config_max < $max_value) {
239 $config_max = undef;
240 }
241 if (defined $config_min && $config_min > $min_value) {
242 $config_min = undef;
243 }
244
245 my $range_padding = $self->_get_number('range_padding');
246 if (defined $config_min) {
247 $min_value = $config_min;
248 }
249 else {
250 if ($min_value > 0) {
251 $min_value = 0;
252 }
253 if ($range_padding && $min_value < 0) {
254 my $difference = $min_value * $range_padding / 100;
255 if ($min_value < -1 && $difference > -1) {
256 $difference = -1;
257 }
258 $min_value += $difference;
259 }
260 }
261 if (defined $config_max) {
262 $max_value = $config_max;
263 }
264 else {
265 if ($range_padding && $max_value > 0) {
266 my $difference = $max_value * $range_padding / 100;
267 if ($max_value > 1 && $difference < 1) {
268 $difference = 1;
269 }
270 $max_value += $difference;
271 }
272 }
f0b01a81 273
274 if ($self->_get_number('automatic_axis')) {
275 # In case this was set via a style, and not by the api method
276 eval { require Chart::Math::Axis; };
277 if ($@) {
278 return $self->_error("Can't use automatic_axis - $@");
279 }
280
281 my $axis = Chart::Math::Axis->new();
282 $axis->include_zero();
283 $axis->add_data($min_value, $max_value);
284 $max_value = $axis->top;
285 $min_value = $axis->bottom;
286 my $ticks = $axis->ticks;
287 # The +1 is there because we have the bottom tick as well
288 $self->set_x_tics($ticks+1);
289 }
290
291 $self->_set_max_value($max_value);
292 $self->_set_min_value($min_value);
293 $self->_set_column_count($column_count);
294
295 return 1;
296}
297
298sub _min {
299 my $self = shift;
300 my $min = shift;
301
302 foreach my $value (@_) {
303 next unless defined $value;
304 if ($value < $min) { $min = $value; }
305 }
306 return $min;
307}
308
309sub _max {
310 my $self = shift;
311 my $min = shift;
312
313 foreach my $value (@_) {
314 next unless defined $value;
315 if ($value > $min) { $min = $value; }
316 }
317 return $min;
318}
319
09bdc58c 320sub _get_line_range {
321 my $self = shift;
322 my $series = $self->_get_data_series()->{'line'};
323 return (undef, undef, 0) unless $series;
324
325 my $max_value = 0;
326 my $min_value = STARTING_MIN_VALUE;
327 my $column_count = 0;
328
329 my @series = @{$series};
330 foreach my $series (@series) {
331 my @data = @{$series->{'data'}};
332
333 if (scalar @data > $column_count) {
334 $column_count = scalar @data;
335 }
336
337 foreach my $value (@data) {
338 if ($value > $max_value) { $max_value = $value; }
339 if ($value < $min_value) { $min_value = $value; }
340 }
341 }
342
343 return ($min_value, $max_value, $column_count);
344}
345
346
347
f0b01a81 348sub _get_bar_range {
349 my $self = shift;
350
351 my $series = $self->_get_data_series()->{'bar'};
352 return (undef, undef, 0) unless $series;
353
354 my $max_value = 0;
355 my $min_value = STARTING_MIN_VALUE;
356 my $column_count = 0;
357
358 my @series = @{$series};
359 foreach my $series (@series) {
360 my @data = @{$series->{'data'}};
361
362 foreach my $value (@data) {
363 $column_count++;
364 if ($value > $max_value) { $max_value = $value; }
365 if ($value < $min_value) { $min_value = $value; }
366 }
367 }
368
369 return ($min_value, $max_value, $column_count);
370}
371
372
373sub _draw_legend {
374 my $self = shift;
375 my $chart_box = shift;
376 my $style = $self->{'_style'};
377
378 my @labels;
379 my $img = $self->_get_image();
380 if (my $series = $self->_get_data_series()->{'bar'}) {
381 push @labels, map { $_->{'series_name'} } @$series;
382 }
383
384 if ($style->{features}{legend} && (scalar @labels)) {
385 $self->SUPER::_draw_legend($self->_get_image(), \@labels, $chart_box)
386 or return;
387 }
388 return;
389}
390
391sub _draw_flat_legend {
392 return 1;
393}
394
395sub _draw_lines {
396 my $self = shift;
397 my $style = $self->{'_style'};
398
399 my $img = $self->_get_image();
400
401 my $max_value = $self->_get_max_value();
402 my $min_value = $self->_get_min_value();
403 my $column_count = $self->_get_column_count();
404
405 my $value_range = $max_value - $min_value;
406
407 my $width = $self->_get_number('width');
408 my $height = $self->_get_number('height');
409
410 my $graph_width = $self->_get_number('graph_width');
411 my $graph_height = $self->_get_number('graph_height');
412
413 my $line_series = $self->_get_data_series()->{'line'};
414 my $series_counter = $self->_get_series_counter() || 0;
415
416 my $has_columns = (defined $self->_get_data_series()->{'column'} || $self->_get_data_series->{'stacked_column'}) ? 1 : 0;
417
09bdc58c 418 my $col_height = int($graph_height / $column_count) -1;
f0b01a81 419
420 my $graph_box = $self->_get_graph_box();
421 my $left = $graph_box->[0] + 1;
422 my $bottom = $graph_box->[1];
423
09bdc58c 424 my $zero_position = $left + $graph_width - (-1*$min_value / $value_range) * ($graph_width - 1);
f0b01a81 425
426 my $line_aa = $self->_get_number("lineaa");
427 foreach my $series (@$line_series) {
428 my @data = @{$series->{'data'}};
429 my $data_size = scalar @data;
430
431 my $interval;
432 if ($has_columns) {
09bdc58c 433 $interval = $graph_height / ($data_size);
f0b01a81 434 }
435 else {
09bdc58c 436 $interval = $graph_height / ($data_size - 1);
f0b01a81 437 }
438 my $color = $self->_data_color($series_counter);
439
440 # We need to add these last, otherwise the next line segment will overwrite half of the marker
441 my @marker_positions;
442 for (my $i = 0; $i < $data_size - 1; $i++) {
09bdc58c 443 my $y1 = $bottom + $i * $interval;
444 my $y2 = $bottom + ($i + 1) * $interval;
f0b01a81 445
09bdc58c 446 $y1 += $has_columns * $interval / 2;
447 $y2 += $has_columns * $interval / 2;
f0b01a81 448
09bdc58c 449 my $x1 = $left + ($value_range - $data[$i] + $min_value)/$value_range * $graph_width;
450 my $x2 = $left + ($value_range - $data[$i + 1] + $min_value)/$value_range * $graph_width;
f0b01a81 451
452 push @marker_positions, [$x1, $y1];
453 $img->line(x1 => $x1, y1 => $y1, x2 => $x2, y2 => $y2, aa => $line_aa, color => $color) || die $img->errstr;
454 }
455
f0b01a81 456
09bdc58c 457 my $y2 = $bottom + ($data_size - 1) * $interval;
458 $y2 += $has_columns * $interval / 2;
459
460 my $x2 = $left + ($value_range - $data[$data_size - 1] + $min_value)/$value_range * $graph_width;
f0b01a81 461
0c2d2199
TC
462 if ($self->_feature_enabled("linemarkers")) {
463 push @marker_positions, [$x2, $y2];
464 foreach my $position (@marker_positions) {
465 $self->_draw_line_marker($position->[0], $position->[1], $series_counter);
466 }
f0b01a81 467 }
468 $series_counter++;
469 }
470
471 $self->_set_series_counter($series_counter);
472 return;
473}
474
f0b01a81 475sub _draw_bars {
476 my $self = shift;
477 my $style = $self->{'_style'};
478
479 my $img = $self->_get_image();
480
481 my $max_value = $self->_get_max_value();
482 my $min_value = $self->_get_min_value();
483 my $column_count = $self->_get_column_count();
484
485 my $value_range = $max_value - $min_value;
486
487 my $width = $self->_get_number('width');
488 my $height = $self->_get_number('height');
489
490 my $graph_width = $self->_get_number('graph_width');
491 my $graph_height = $self->_get_number('graph_height');
492
493
494 my $graph_box = $self->_get_graph_box();
495 my $bottom = $graph_box->[1] + 1;
496 my $left = $graph_box->[0];
497
498 my $zero_position = int($left + (-1*$min_value / $value_range) * ($graph_width-1));
499
95289584 500 my $bar_height = $graph_height / $column_count;
f0b01a81 501
502 my $outline_color;
503 if ($style->{'features'}{'outline'}) {
504 $outline_color = $self->_get_color('outline.line');
505 }
506
507 my $series_counter = $self->_get_series_counter() || 0;
508 my $col_series = $self->_get_data_series()->{'bar'};
509 my $column_padding = $self->_get_number('column_padding') || 0;
510
511 # 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.
512 my $column_series = 0;
513
514 for (my $series_pos = 0; $series_pos < scalar @$col_series; $series_pos++) {
515 my $series = $col_series->[$series_pos];
516 my @data = @{$series->{'data'}};
517 my $data_size = scalar @data;
f0b01a81 518 for (my $i = 0; $i < $data_size; $i++) {
519
95289584 520 my $part1 = $bar_height * (scalar @$col_series * $i);
521 my $part2 = ($series_pos) * $bar_height;
522 my $y1 = int($bottom + $part1 + $part2);
f0b01a81 523
95289584 524 my $y2 = int($y1 + $bar_height - $column_padding)-1;
525 # Special case for when bar_height is less than 1.
526 if ($y2 < $y1) {
527 $y2 = $y1;
528 }
f0b01a81 529
530 my $x1 = int($left - ($min_value - $data[$i]) / $value_range * $graph_width);
531
532 my $color = $self->_data_color($series_counter);
533
f0b01a81 534 if ($data[$i] > 0) {
7422650e 535 my @fill = $self->_data_fill($series_counter, [$zero_position+1, $y1, $x1, $y2]);
536 $img->box(xmax => $x1, xmin => $zero_position+1, ymin => $y1, ymax => $y2, @fill);
f0b01a81 537 if ($style->{'features'}{'outline'}) {
538 $img->box(xmax => $x1, xmin => $zero_position, ymin => $y1, ymax => $y2, color => $outline_color);
539 }
540 }
541 elsif ($data[$i] == 0) {
542 }
543 else {
7422650e 544 my @fill = $self->_data_fill($series_counter, [$x1, $y1, $zero_position, $y2]);
545 $img->box(xmax => $zero_position , xmin => $x1, ymin => $y1, ymax => $y2, @fill);
f0b01a81 546 if ($style->{'features'}{'outline'}) {
547 $img->box(xmax => $zero_position, xmin => $x1, ymin => $y1, ymax => $y2, color => $outline_color);
548 }
549 }
550 }
551
552 $series_counter++;
553 $column_series++;
554 }
555 $self->_set_series_counter($series_counter);
556 return;
557}
558
559sub _add_data_series {
560 my $self = shift;
561 my $series_type = shift;
562 my $data_ref = shift;
563 my $series_name = shift;
564
565 my $graph_data = $self->{'graph_data'} || {};
566
567 my $series = $graph_data->{$series_type} || [];
568
569 push @$series, { data => $data_ref, series_name => $series_name };
570
571 $graph_data->{$series_type} = $series;
572
573 $self->{'graph_data'} = $graph_data;
574 return;
575}
576
577=over
578
579=item show_vertical_gridlines()
580
581Shows vertical gridlines at the y-tics.
582
86f73dc2
TC
583Feature: vertical_gridlines
584
f0b01a81 585=cut
586
587sub show_vertical_gridlines {
56b495c0 588 $_[0]->{'custom_style'}{features}{'vertical_gridlines'} = 1;
f0b01a81 589}
590
86f73dc2
TC
591=item set_vertical_gridline_style(color => ..., style => ...)
592
593Set the color and style of the lines drawn for gridlines.
594
595Style equivalent: vgrid
596
597=cut
598
599sub set_vertical_gridline_style {
600 my ($self, %opts) = @_;
601
602 $self->{custom_style}{vgrid} ||= {};
603 @{$self->{custom_style}{vgrid}}{keys %opts} = values %opts;
604
605 return 1;
606}
607
0c2d2199
TC
608=item show_line_markers()
609
610=item show_line_markers($value)
611
612Feature: linemarkers.
613
614If $value is missing or true, draw markers on a line data series.
615
616Note: line markers are drawn by default.
617
618=cut
619
620sub show_line_markers {
621 my ($self, $value) = @_;
622
623 @_ > 1 or $value = 1;
624
625 $self->{custom_style}{features}{linemarkers} = $value;
626
627 return 1;
628}
629
f0b01a81 630=item use_automatic_axis()
631
632Automatically scale the Y axis, based on L<Chart::Math::Axis>. If Chart::Math::Axis isn't installed, this sets an error and returns undef. Returns 1 if it is installed.
633
634=cut
635
636sub use_automatic_axis {
637 eval { require Chart::Math::Axis; };
638 if ($@) {
639 return $_[0]->_error("use_automatic_axis - $@\nCalled from ".join(' ', caller)."\n");
640 }
641 $_[0]->{'custom_style'}->{'automatic_axis'} = 1;
642 return 1;
643}
644
645
646=item set_x_tics($count)
647
648Set the number of X tics to use. Their value and position will be determined by the data range.
649
650=cut
651
652sub set_x_tics {
653 $_[0]->{'x_tics'} = $_[1];
654}
655
656sub _get_x_tics {
657 return $_[0]->{'x_tics'} || 0;
658}
659
660sub _remove_tics_from_chart_box {
86f73dc2 661 my ($self, $chart_box, $opts) = @_;
f0b01a81 662
663 # XXX - bad default
86f73dc2 664 my $tic_width = $self->_get_y_tic_width($opts) || 10;
f0b01a81 665 my @y_tic_box = ($chart_box->[0], $chart_box->[1], $chart_box->[0] + $tic_width, $chart_box->[3]);
666
667 # XXX - bad default
668 my $tic_height = $self->_get_x_tic_height() || 10;
669 my @x_tic_box = ($chart_box->[0], $chart_box->[3] - $tic_height, $chart_box->[2], $chart_box->[3]);
670
671 $self->_remove_box($chart_box, \@y_tic_box);
672 $self->_remove_box($chart_box, \@x_tic_box);
673
674 # If there's no title, the y-tics will be part off-screen. Half of the x-tic height should be more than sufficient.
675 my @y_tic_tops = ($chart_box->[0], $chart_box->[1], $chart_box->[2], $chart_box->[1] + int($tic_height / 2));
676 $self->_remove_box($chart_box, \@y_tic_tops);
677
267997be 678 if (my @box = $self->_text_bbox($self->_get_max_value(), 'legend')) {
679 my @remove_box = ($chart_box->[2] - int($box[2] / 2) - 1,
680 $chart_box->[1],
681 $chart_box->[2],
682 $chart_box->[3]
683 );
684
685 $self->_remove_box($chart_box, \@remove_box);
686 }
687
688
f0b01a81 689}
690
691sub _get_y_tic_width {
86f73dc2 692 my ($self, $opts) = @_;
f0b01a81 693
86f73dc2 694 my $labels = $self->_get_labels($opts);
43c5d51b 695
696 if (!$labels) {
697 return;
698 }
699
700 my %text_info = $self->_text_style('legend')
701 or return;
702
f0b01a81 703 my $max_width = 0;
704 foreach my $label (@$labels) {
705 my @box = $self->_text_bbox($label, 'legend');
706 my $width = $box[2] + 5;
707 # For the tic itself...
708 $width += 10;
709 if ($width > $max_width) {
710 $max_width = $width;
711 }
712 }
713 return $max_width;
714}
715
716sub _get_x_tic_height {
717 my $self = shift;
718
719 my $min = $self->_get_min_value();
720 my $max = $self->_get_max_value();
721 my $tic_count = $self->_get_x_tics();
722
723 my $interval = ($max - $min) / ($tic_count - 1);
724
725 my %text_info = $self->_text_style('legend')
726 or return;
727
728 my $max_height = 0;
729 for my $count (0 .. $tic_count - 1) {
730 my $value = sprintf("%.2f", ($count*$interval)+$min);
731
732 my @box = $self->_text_bbox($value, 'legend');
733 my $height = $box[3] - $box[1];
734
735 # For the tic width
736 $height += 10;
737 if ($height > $max_height) {
738 $max_height = $height;
739 }
740 }
741
742
743 return $max_height;
744}
745
746sub _draw_y_tics {
86f73dc2 747 my ($self, $opts) = @_;
f0b01a81 748
749 my $img = $self->_get_image();
750 my $graph_box = $self->_get_graph_box();
751 my $image_box = $self->_get_image_box();
752
86f73dc2 753 my $labels = $self->_get_labels($opts);
f0b01a81 754
755 my $tic_count = (scalar @$labels) - 1;
756
757 my $has_columns = defined $self->_get_data_series()->{'bar'};
758
759 # If we have columns, we want the x-ticks to show up in the middle of the column, not on the left edge
760 my $denominator = $tic_count;
761 if ($has_columns) {
762 $denominator ++;
763 }
764 my $tic_distance = ($graph_box->[3] - $graph_box->[1]) / ($denominator);
765 my %text_info = $self->_text_style('legend')
766 or return;
767
768 for my $count (0 .. $tic_count) {
769 my $label = $labels->[$count];
770
771 my $x1 = $graph_box->[0] - 5;
772 my $x2 = $graph_box->[0] + 5;
773
774 my $y1 = $graph_box->[1] + ($tic_distance * $count);
775
776 if ($has_columns) {
777 $y1 += $tic_distance / 2;
778 }
779
780 $img->line(x1 => $x1, x2 => $x2, y1 => $y1, y2 => $y1, aa => 1, color => '000000');
781
782 my @box = $self->_text_bbox($label, 'legend')
783 or return;
784
785 my $width = $box[2];
786 my $height = $box[3];
787
788 $img->string(%text_info,
789 x => ($x1 - ($width + 5)),
790 y => ($y1 + ($height / 2)),
791 text => $label
792 );
793
794 }
795
796}
797
798sub _draw_x_tics {
799 my $self = shift;
800
801 my $img = $self->_get_image();
802 my $graph_box = $self->_get_graph_box();
803 my $image_box = $self->_get_image_box();
804
805 my $tic_count = $self->_get_x_tics();
806 my $min = $self->_get_min_value();
807 my $max = $self->_get_max_value();
808 my $interval = ($max - $min) / ($tic_count - 1);
809
810 # If we have columns, we want the x-ticks to show up in the middle of the column, not on the left edge
811 my $tic_distance = ($graph_box->[2] - $graph_box->[0]) / ($tic_count -1);
812
813 my %text_info = $self->_text_style('legend')
814 or return;
815
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816 my $show_gridlines = $self->{_style}{features}{'vertical_gridlines'};
817 my @grid_line = $self->_get_line("vgrid");
f0b01a81 818 for my $count (0 .. $tic_count-1) {
819 my $x1 = $graph_box->[0] + ($tic_distance * $count);
820
821 my $y1 = $graph_box->[3] + 5;
822 my $y2 = $graph_box->[3] - 5;
823
824 my $value = ($count*$interval)+$min;
825
826 $img->line(x1 => $x1, x2 => $x1, y1 => $y1, y2 => $y2, aa => 1, color => '000000');
827
828 my @box = $self->_text_bbox($value, 'legend')
829 or return;
830
831 my $width = $box[2];
832 my $height = $box[3];
833
834 $img->string(%text_info,
835 x => ($x1 - ($width / 2)),
836 y => ($y1 + $height + 5),
837 text => $value
838 );
839
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840 if ($show_gridlines && $x1 != $graph_box->[0] && $x1 != $graph_box->[2]) {
841 $self->_line(x1 => $x1, x2 => $x1,
86f73dc2 842 y1 => $graph_box->[1], y2 => $graph_box->[3],
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TC
843 img => $img,
844 @grid_line);
f0b01a81 845 }
846 }
847}
848
849sub _valid_input {
850 my $self = shift;
851
852 if (!defined $self->_get_data_series() || !keys %{$self->_get_data_series()}) {
853 return $self->_error("No data supplied");
854 }
855
856 my $data = $self->_get_data_series();
857 if (defined $data->{'line'} && !scalar @{$data->{'line'}->[0]->{'data'}}) {
858 return $self->_error("No values in data series");
859 }
860 if (defined $data->{'column'} && !scalar @{$data->{'column'}->[0]->{'data'}}) {
861 return $self->_error("No values in data series");
862 }
863 if (defined $data->{'stacked_column'} && !scalar @{$data->{'stacked_column'}->[0]->{'data'}}) {
864 return $self->_error("No values in data series");
865 }
866
867 return 1;
868}
869
870sub _set_column_count { $_[0]->{'column_count'} = $_[1]; }
871sub _set_min_value { $_[0]->{'min_value'} = $_[1]; }
872sub _set_max_value { $_[0]->{'max_value'} = $_[1]; }
873sub _set_image_box { $_[0]->{'image_box'} = $_[1]; }
874sub _set_graph_box { $_[0]->{'graph_box'} = $_[1]; }
875sub _set_series_counter { $_[0]->{'series_counter'} = $_[1]; }
876sub _get_column_count { return $_[0]->{'column_count'} }
877sub _get_min_value { return $_[0]->{'min_value'} }
878sub _get_max_value { return $_[0]->{'max_value'} }
879sub _get_image_box { return $_[0]->{'image_box'} }
880sub _get_graph_box { return $_[0]->{'graph_box'} }
86f73dc2 881sub _reset_series_counter { $_[0]->{series_counter} = 0 }
f0b01a81 882sub _get_series_counter { return $_[0]->{'series_counter'} }
883
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TC
884sub _style_defs {
885 my ($self) = @_;
886
887 my %work = %{$self->SUPER::_style_defs()};
0c2d2199 888 push @{$work{features}}, qw/graph_outline graph_fill linemarkers/;
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889 $work{vgrid} =
890 {
891 color => "lookup(fg)",
892 style => "solid",
893 };
894
895 return \%work;
896}
897
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898sub _composite {
899 my ($self) = @_;
900 return ( $self->SUPER::_composite(), "graph", "vgrid" );
901}
902
f0b01a81 9031;
904