1 package Imager::Graph::Vertical;
5 Imager::Graph::Vertical- A super class for line/bar/column charts
12 @ISA = qw(Imager::Graph);
14 use constant STARTING_MIN_VALUE => 99999;
17 =item add_data_series(\@data, $series_name)
19 Add a data series to the graph, of the default type.
26 my $series_name = shift;
28 my $series_type = $self->_get_default_series_type();
29 $self->_add_data_series($series_type, $data_ref, $series_name);
34 =item add_column_data_series(\@data, $series_name)
36 Add a column data series to the graph.
40 sub add_column_data_series {
43 my $series_name = shift;
45 $self->_add_data_series('column', $data_ref, $series_name);
50 =item add_stacked_column_data_series(\@data, $series_name)
52 Add a stacked column data series to the graph.
56 sub add_stacked_column_data_series {
59 my $series_name = shift;
61 $self->_add_data_series('stacked_column', $data_ref, $series_name);
66 =item add_line_data_series(\@data, $series_name)
68 Add a line data series to the graph.
72 sub add_line_data_series {
75 my $series_name = shift;
77 $self->_add_data_series('line', $data_ref, $series_name);
82 =item set_y_max($value)
84 Sets the maximum y value to be displayed. This will be ignored if the y_max is lower than the highest value.
89 $_[0]->{'custom_style'}->{'y_max'} = $_[1];
92 =item set_y_min($value)
94 Sets the minimum y value to be displayed. This will be ignored if the y_min is higher than the lowest value.
99 $_[0]->{'custom_style'}->{'y_min'} = $_[1];
102 =item set_column_padding($int)
104 Sets the padding between columns. This is a percentage of the column width. Defaults to 0.
108 sub set_column_padding {
109 $_[0]->{'custom_style'}->{'column_padding'} = $_[1];
112 =item set_range_padding($percentage)
114 Sets the padding to be used, as a percentage. For example, if your data ranges from 0 to 10, and you have a 20 percent padding, the y axis will go to 12.
116 Defaults to 10. This attribute is ignored for positive numbers if set_y_max() has been called, and ignored for negative numbers if set_y_min() has been called.
120 sub set_range_padding {
121 $_[0]->{'custom_style'}->{'range_padding'} = $_[1];
124 =item set_negative_background($color)
126 Sets the background color used below the x axis.
130 sub set_negative_background {
131 $_[0]->{'custom_style'}->{'negative_bg'} = $_[1];
141 my ($self, %opts) = @_;
143 if (!$self->_valid_input()) {
147 $self->_style_setup(\%opts);
149 my $style = $self->{_style};
151 my $img = $self->_get_image()
154 my @image_box = ( 0, 0, $img->getwidth-1, $img->getheight-1 );
155 $self->_set_image_box(\@image_box);
157 my @chart_box = ( 0, 0, $img->getwidth-1, $img->getheight-1 );
158 $self->_draw_legend(\@chart_box);
159 if ($style->{title}{text}) {
160 $self->_draw_title($img, \@chart_box)
164 # Scale the graph box down to the widest graph that can cleanly hold the # of columns.
165 return unless $self->_get_data_range();
166 $self->_remove_tics_from_chart_box(\@chart_box);
167 my $column_count = $self->_get_column_count();
169 my $width = $self->_get_number('width');
170 my $height = $self->_get_number('height');
172 my $graph_width = $chart_box[2] - $chart_box[0];
173 my $graph_height = $chart_box[3] - $chart_box[1];
175 my $col_width = int(($graph_width - 1) / $column_count) -1;
176 $graph_width = $col_width * $column_count + 1;
178 my $tic_count = $self->_get_y_tics();
179 my $tic_distance = int(($graph_height-1) / ($tic_count - 1));
180 $graph_height = $tic_distance * ($tic_count - 1);
182 my $bottom = $chart_box[1];
183 my $left = $chart_box[0];
185 $self->{'_style'}{'graph_width'} = $graph_width;
186 $self->{'_style'}{'graph_height'} = $graph_height;
188 my @graph_box = ($left, $bottom, $left + $graph_width, $bottom + $graph_height);
189 $self->_set_graph_box(\@graph_box);
192 color => $self->_get_color('outline.line'),
194 xmax => $left+$graph_width,
196 ymax => $bottom+$graph_height,
200 color => $self->_get_color('bg'),
202 xmax => $left+$graph_width - 1,
204 ymax => $bottom+$graph_height-1 ,
208 my $min_value = $self->_get_min_value();
209 my $max_value = $self->_get_max_value();
210 my $value_range = $max_value - $min_value;
214 $zero_position = $bottom + $graph_height - (-1*$min_value / $value_range) * ($graph_height-1);
217 if ($min_value < 0) {
219 color => $self->_get_color('negative_bg'),
221 xmax => $left+$graph_width- 1,
222 ymin => $zero_position,
223 ymax => $bottom+$graph_height - 1,
228 y1 => $zero_position,
229 x2 => $left + $graph_width,
230 y2 => $zero_position,
231 color => $self->_get_color('outline.line'),
235 if ($self->_get_data_series()->{'stacked_column'}) {
236 return unless $self->_draw_stacked_columns();
238 if ($self->_get_data_series()->{'column'}) {
239 return unless $self->_draw_columns();
241 if ($self->_get_data_series()->{'line'}) {
242 return unless $self->_draw_lines();
245 if ($self->_get_y_tics()) {
246 $self->_draw_y_tics();
248 if ($self->_get_labels()) {
249 $self->_draw_x_tics();
252 return $self->_get_image();
255 sub _get_data_range {
260 my $column_count = 0;
262 my ($sc_min, $sc_max, $sc_cols) = $self->_get_stacked_column_range();
263 my ($c_min, $c_max, $c_cols) = $self->_get_column_range();
264 my ($l_min, $l_max, $l_cols) = $self->_get_line_range();
266 # These are side by side...
269 $min_value = $self->_min(STARTING_MIN_VALUE, $sc_min, $c_min, $l_min);
270 $max_value = $self->_max(0, $sc_max, $c_max, $l_max);
272 my $config_min = $self->_get_number('y_min');
273 my $config_max = $self->_get_number('y_max');
275 if (defined $config_max && $config_max < $max_value) {
278 if (defined $config_min && $config_min > $min_value) {
282 my $range_padding = $self->_get_number('range_padding');
283 if (defined $config_min) {
284 $min_value = $config_min;
287 if ($min_value > 0) {
290 if ($range_padding && $min_value < 0) {
291 my $difference = $min_value * $range_padding / 100;
292 if ($min_value < -1 && $difference > -1) {
295 $min_value += $difference;
298 if (defined $config_max) {
299 $max_value = $config_max;
302 if ($range_padding && $max_value > 0) {
303 my $difference = $max_value * $range_padding / 100;
304 if ($max_value > 1 && $difference < 1) {
307 $max_value += $difference;
310 $column_count = $self->_max(0, $sc_cols, $l_cols);
312 if ($self->_get_number('automatic_axis')) {
313 # In case this was set via a style, and not by the api method
314 eval { require Chart::Math::Axis; };
316 return $self->_error("Can't use automatic_axis - $@");
319 my $axis = Chart::Math::Axis->new();
320 $axis->include_zero();
321 $axis->add_data($min_value, $max_value);
322 $max_value = $axis->top;
323 $min_value = $axis->bottom;
324 my $ticks = $axis->ticks;
325 # The +1 is there because we have the bottom tick as well
326 $self->set_y_tics($ticks+1);
329 $self->_set_max_value($max_value);
330 $self->_set_min_value($min_value);
331 $self->_set_column_count($column_count);
340 foreach my $value (@_) {
341 next unless defined $value;
342 if ($value < $min) { $min = $value; }
351 foreach my $value (@_) {
352 next unless defined $value;
353 if ($value > $min) { $min = $value; }
358 sub _get_line_range {
360 my $series = $self->_get_data_series()->{'line'};
361 return (undef, undef, 0) unless $series;
364 my $min_value = STARTING_MIN_VALUE;
365 my $column_count = 0;
367 my @series = @{$series};
368 foreach my $series (@series) {
369 my @data = @{$series->{'data'}};
371 if (scalar @data > $column_count) {
372 $column_count = scalar @data;
375 foreach my $value (@data) {
376 if ($value > $max_value) { $max_value = $value; }
377 if ($value < $min_value) { $min_value = $value; }
381 return ($min_value, $max_value, $column_count);
384 sub _get_column_range {
387 my $series = $self->_get_data_series()->{'column'};
388 return (undef, undef, 0) unless $series;
391 my $min_value = STARTING_MIN_VALUE;
392 my $column_count = 0;
394 my @series = @{$series};
395 foreach my $series (@series) {
396 my @data = @{$series->{'data'}};
398 foreach my $value (@data) {
400 if ($value > $max_value) { $max_value = $value; }
401 if ($value < $min_value) { $min_value = $value; }
405 return ($min_value, $max_value, $column_count);
408 sub _get_stacked_column_range {
412 my $min_value = STARTING_MIN_VALUE;
413 my $column_count = 0;
415 return (undef, undef, 0) unless $self->_get_data_series()->{'stacked_column'};
416 my @series = @{$self->_get_data_series()->{'stacked_column'}};
420 for (my $i = scalar @series - 1; $i >= 0; $i--) {
421 my $series = $series[$i];
422 my $data = $series->{'data'};
424 for (my $i = 0; $i < scalar @$data; $i++) {
426 if ($data->[$i] > 0) {
427 $value = $data->[$i] + ($max_entries[$i] || 0);
428 $data->[$i] = $value;
429 $max_entries[$i] = $value;
431 elsif ($data->[$i] < 0) {
432 $value = $data->[$i] + ($min_entries[$i] || 0);
433 $data->[$i] = $value;
434 $min_entries[$i] = $value;
436 if ($value > $max_value) { $max_value = $value; }
437 if ($value < $min_value) { $min_value = $value; }
439 if (scalar @$data > $column_count) {
440 $column_count = scalar @$data;
444 return ($min_value, $max_value, $column_count);
449 my $chart_box = shift;
450 my $style = $self->{'_style'};
453 my $img = $self->_get_image();
454 if (my $series = $self->_get_data_series()->{'stacked_column'}) {
455 push @labels, map { $_->{'series_name'} } @$series;
457 if (my $series = $self->_get_data_series()->{'column'}) {
458 push @labels, map { $_->{'series_name'} } @$series;
460 if (my $series = $self->_get_data_series()->{'line'}) {
461 push @labels, map { $_->{'series_name'} } @$series;
464 if ($style->{features}{legend} && (scalar @labels)) {
465 $self->SUPER::_draw_legend($self->_get_image(), \@labels, $chart_box)
471 sub _draw_flat_legend {
477 my $style = $self->{'_style'};
479 my $img = $self->_get_image();
481 my $max_value = $self->_get_max_value();
482 my $min_value = $self->_get_min_value();
483 my $column_count = $self->_get_column_count();
485 my $value_range = $max_value - $min_value;
487 my $width = $self->_get_number('width');
488 my $height = $self->_get_number('height');
490 my $graph_width = $self->_get_number('graph_width');
491 my $graph_height = $self->_get_number('graph_height');
493 my $line_series = $self->_get_data_series()->{'line'};
494 my $series_counter = $self->_get_series_counter() || 0;
496 my $has_columns = (defined $self->_get_data_series()->{'column'} || $self->_get_data_series->{'stacked_column'}) ? 1 : 0;
498 my $col_width = int($graph_width / $column_count) -1;
500 my $graph_box = $self->_get_graph_box();
501 my $left = $graph_box->[0] + 1;
502 my $bottom = $graph_box->[1];
504 my $zero_position = $bottom + $graph_height - (-1*$min_value / $value_range) * ($graph_height - 1);
507 my $line_aa = $self->_get_number("lineaa");
508 foreach my $series (@$line_series) {
509 my @data = @{$series->{'data'}};
510 my $data_size = scalar @data;
514 $interval = $graph_width / ($data_size);
517 $interval = $graph_width / ($data_size - 1);
519 my $color = $self->_data_color($series_counter);
521 # We need to add these last, otherwise the next line segment will overwrite half of the marker
522 my @marker_positions;
523 for (my $i = 0; $i < $data_size - 1; $i++) {
524 my $x1 = $left + $i * $interval;
525 my $x2 = $left + ($i + 1) * $interval;
527 $x1 += $has_columns * $interval / 2;
528 $x2 += $has_columns * $interval / 2;
530 my $y1 = $bottom + ($value_range - $data[$i] + $min_value)/$value_range * $graph_height;
531 my $y2 = $bottom + ($value_range - $data[$i + 1] + $min_value)/$value_range * $graph_height;
533 push @marker_positions, [$x1, $y1];
534 $img->line(x1 => $x1, y1 => $y1, x2 => $x2, y2 => $y2, aa => $line_aa, color => $color) || die $img->errstr;
537 my $x2 = $left + ($data_size - 1) * $interval;
538 $x2 += $has_columns * $interval / 2;
540 my $y2 = $bottom + ($value_range - $data[$data_size - 1] + $min_value)/$value_range * $graph_height;
542 push @marker_positions, [$x2, $y2];
543 foreach my $position (@marker_positions) {
544 $self->_draw_line_marker($position->[0], $position->[1], $series_counter);
549 $self->_set_series_counter($series_counter);
554 my ($self, $index) = @_;
556 my $markers = $self->{'_style'}{'line_markers'};
560 my $marker = $markers->[$index % @$markers];
565 sub _draw_line_marker {
567 my ($x1, $y1, $series_counter) = @_;
569 my $img = $self->_get_image();
571 my $style = $self->_line_marker($series_counter);
572 return unless $style;
574 my $type = $style->{'shape'};
575 my $radius = $style->{'radius'};
577 my $line_aa = $self->_get_number("lineaa");
578 my $fill_aa = $self->_get_number("fill.aa");
579 if ($type eq 'circle') {
580 my @fill = $self->_data_fill($series_counter, [$x1 - $radius, $y1 - $radius, $x1 + $radius, $y1 + $radius]);
581 $img->circle(x => $x1, y => $y1, r => $radius, aa => $fill_aa, filled => 1, @fill);
583 elsif ($type eq 'square') {
584 my @fill = $self->_data_fill($series_counter, [$x1 - $radius, $y1 - $radius, $x1 + $radius, $y1 + $radius]);
585 $img->box(xmin => $x1 - $radius, ymin => $y1 - $radius, xmax => $x1 + $radius, ymax => $y1 + $radius, @fill);
587 elsif ($type eq 'diamond') {
588 # The gradient really doesn't work for diamond
589 my $color = $self->_data_color($series_counter);
592 [$x1 - $radius, $y1],
593 [$x1, $y1 + $radius],
594 [$x1 + $radius, $y1],
595 [$x1, $y1 - $radius],
597 filled => 1, color => $color, aa => $fill_aa);
599 elsif ($type eq 'triangle') {
600 # The gradient really doesn't work for triangle
601 my $color = $self->_data_color($series_counter);
604 [$x1 - $radius, $y1 + $radius],
605 [$x1 + $radius, $y1 + $radius],
606 [$x1, $y1 - $radius],
608 filled => 1, color => $color, aa => $fill_aa);
611 elsif ($type eq 'x') {
612 my $color = $self->_data_color($series_counter);
613 $img->line(x1 => $x1 - $radius, y1 => $y1 -$radius, x2 => $x1 + $radius, y2 => $y1+$radius, aa => $line_aa, color => $color) || die $img->errstr;
614 $img->line(x1 => $x1 + $radius, y1 => $y1 -$radius, x2 => $x1 - $radius, y2 => $y1+$radius, aa => $line_aa, color => $color) || die $img->errstr;
616 elsif ($type eq 'plus') {
617 my $color = $self->_data_color($series_counter);
618 $img->line(x1 => $x1, y1 => $y1 -$radius, x2 => $x1, y2 => $y1+$radius, aa => $line_aa, color => $color) || die $img->errstr;
619 $img->line(x1 => $x1 + $radius, y1 => $y1, x2 => $x1 - $radius, y2 => $y1, aa => $line_aa, color => $color) || die $img->errstr;
625 my $style = $self->{'_style'};
627 my $img = $self->_get_image();
629 my $max_value = $self->_get_max_value();
630 my $min_value = $self->_get_min_value();
631 my $column_count = $self->_get_column_count();
633 my $value_range = $max_value - $min_value;
635 my $width = $self->_get_number('width');
636 my $height = $self->_get_number('height');
638 my $graph_width = $self->_get_number('graph_width');
639 my $graph_height = $self->_get_number('graph_height');
642 my $graph_box = $self->_get_graph_box();
643 my $left = $graph_box->[0] + 1;
644 my $bottom = $graph_box->[1];
645 my $zero_position = int($bottom + $graph_height - (-1*$min_value / $value_range) * ($graph_height -1));
647 my $bar_width = int($graph_width / $column_count - 1);
650 if ($style->{'features'}{'outline'}) {
651 $outline_color = $self->_get_color('outline.line');
654 my $series_counter = $self->_get_series_counter() || 0;
655 my $col_series = $self->_get_data_series()->{'column'};
656 my $column_padding_percent = $self->_get_number('column_padding') || 0;
657 my $column_padding = int($column_padding_percent * $bar_width / 100);
659 # 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.
660 my $column_series = 0;
662 # If there are stacked columns, non-stacked columns need to start one to the right of where they would otherwise
663 my $has_stacked_columns = (defined $self->_get_data_series()->{'stacked_column'} ? 1 : 0);
665 for (my $series_pos = 0; $series_pos < scalar @$col_series; $series_pos++) {
666 my $series = $col_series->[$series_pos];
667 my @data = @{$series->{'data'}};
668 my $data_size = scalar @data;
669 my $color = $self->_data_color($series_counter);
670 for (my $i = 0; $i < $data_size; $i++) {
671 my $x1 = int($left + $bar_width * (scalar @$col_series * $i + $series_pos)) + scalar @$col_series * $i + $series_pos + ($column_padding / 2);
672 if ($has_stacked_columns) {
673 $x1 += ($i + 1) * $bar_width + $i + 1;
675 my $x2 = $x1 + $bar_width - $column_padding;
677 my $y1 = int($bottom + ($value_range - $data[$i] + $min_value)/$value_range * $graph_height);
679 my $color = $self->_data_color($series_counter);
681 # my @fill = $self->_data_fill($series_counter, [$x1, $y1, $x2, $zero_position]);
683 $img->box(xmin => $x1, xmax => $x2, ymin => $y1, ymax => $zero_position-1, color => $color, filled => 1);
684 if ($style->{'features'}{'outline'}) {
685 $img->box(xmin => $x1, xmax => $x2, ymin => $y1, ymax => $zero_position, color => $outline_color);
689 $img->box(xmin => $x1, xmax => $x2, ymin => $zero_position+1, ymax => $y1, color => $color, filled => 1);
690 if ($style->{'features'}{'outline'}) {
691 $img->box(xmin => $x1, xmax => $x2, ymin => $zero_position+1, ymax => $y1+1, color => $outline_color);
699 $self->_set_series_counter($series_counter);
703 sub _draw_stacked_columns {
705 my $style = $self->{'_style'};
707 my $img = $self->_get_image();
709 my $max_value = $self->_get_max_value();
710 my $min_value = $self->_get_min_value();
711 my $column_count = $self->_get_column_count();
712 my $value_range = $max_value - $min_value;
714 my $graph_box = $self->_get_graph_box();
715 my $left = $graph_box->[0] + 1;
716 my $bottom = $graph_box->[1];
718 my $graph_width = $self->_get_number('graph_width');
719 my $graph_height = $self->_get_number('graph_height');
721 my $bar_width = int($graph_width / $column_count -1);
722 my $column_series = 0;
723 if (my $column_series_data = $self->_get_data_series()->{'column'}) {
724 $column_series = (scalar @$column_series_data);
728 my $column_padding_percent = $self->_get_number('column_padding') || 0;
729 if ($column_padding_percent < 0) {
730 return $self->_error("Column padding less than 0");
732 if ($column_padding_percent > 100) {
733 return $self->_error("Column padding greater than 0");
735 my $column_padding = int($column_padding_percent * $bar_width / 100);
738 if ($style->{'features'}{'outline'}) {
739 $outline_color = $self->_get_color('outline.line');
742 my $zero_position = $bottom + $graph_height - (-1*$min_value / $value_range) * ($graph_height -1);
743 my $col_series = $self->_get_data_series()->{'stacked_column'};
744 my $series_counter = $self->_get_series_counter() || 0;
746 foreach my $series (@$col_series) {
747 my @data = @{$series->{'data'}};
748 my $data_size = scalar @data;
749 my $color = $self->_data_color($series_counter);
750 for (my $i = 0; $i < $data_size; $i++) {
751 my $x1 = int($left + $bar_width * ($column_series * $i)) + $column_series * $i + ($column_padding / 2);
752 my $x2 = $x1 + $bar_width - $column_padding;
754 my $y1 = int($bottom + ($value_range - $data[$i] + $min_value)/$value_range * $graph_height);
757 $img->box(xmin => $x1, xmax => $x2, ymin => $y1, ymax => $zero_position-1, color => $color, filled => 1);
758 if ($style->{'features'}{'outline'}) {
759 $img->box(xmin => $x1, xmax => $x2, ymin => $y1, ymax => $zero_position, color => $outline_color);
763 $img->box(xmin => $x1, xmax => $x2, ymin => $zero_position+1, ymax => $y1, color => $color, filled => 1);
764 if ($style->{'features'}{'outline'}) {
765 $img->box(xmin => $x1, xmax => $x2, ymin => $zero_position+1, ymax => $y1+1, color => $outline_color);
772 $self->_set_series_counter($series_counter);
776 sub _add_data_series {
778 my $series_type = shift;
779 my $data_ref = shift;
780 my $series_name = shift;
782 my $graph_data = $self->{'graph_data'} || {};
784 my $series = $graph_data->{$series_type} || [];
786 push @$series, { data => $data_ref, series_name => $series_name };
788 $graph_data->{$series_type} = $series;
790 $self->{'graph_data'} = $graph_data;
796 =item show_horizontal_gridlines()
798 Shows horizontal gridlines at the y-tics.
802 sub show_horizontal_gridlines {
803 $_[0]->{'custom_style'}->{'horizontal_gridlines'} = 1;
806 =item use_automatic_axis()
808 Automatically 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.
812 sub use_automatic_axis {
813 eval { require Chart::Math::Axis; };
815 return $_[0]->_error("use_automatic_axis - $@\nCalled from ".join(' ', caller)."\n");
817 $_[0]->{'custom_style'}->{'automatic_axis'} = 1;
822 =item set_y_tics($count)
824 Set the number of Y tics to use. Their value and position will be determined by the data range.
829 $_[0]->{'y_tics'} = $_[1];
833 return $_[0]->{'y_tics'} || 0;
836 sub _remove_tics_from_chart_box {
838 my $chart_box = shift;
841 my $tic_width = $self->_get_y_tic_width() || 10;
842 my @y_tic_box = ($chart_box->[0], $chart_box->[1], $chart_box->[0] + $tic_width, $chart_box->[3]);
845 my $tic_height = $self->_get_x_tic_height() || 10;
846 my @x_tic_box = ($chart_box->[0], $chart_box->[3] - $tic_height, $chart_box->[2], $chart_box->[3]);
848 $self->_remove_box($chart_box, \@y_tic_box);
849 $self->_remove_box($chart_box, \@x_tic_box);
851 # If there's no title, the y-tics will be part off-screen. Half of the x-tic height should be more than sufficient.
852 my @y_tic_tops = ($chart_box->[0], $chart_box->[1], $chart_box->[2], $chart_box->[1] + int($tic_height / 2));
853 $self->_remove_box($chart_box, \@y_tic_tops);
857 sub _get_y_tic_width{
859 my $min = $self->_get_min_value();
860 my $max = $self->_get_max_value();
861 my $tic_count = $self->_get_y_tics();
863 my $interval = ($max - $min) / ($tic_count - 1);
865 my %text_info = $self->_text_style('legend')
869 for my $count (0 .. $tic_count - 1) {
870 my $value = sprintf("%.2f", ($count*$interval)+$min);
872 my @box = $self->_text_bbox($value, 'legend');
873 my $width = $box[2] - $box[0];
877 if ($width > $max_width) {
885 sub _get_x_tic_height {
888 my $labels = $self->_get_labels();
894 my $tic_count = (scalar @$labels) - 1;
896 my %text_info = $self->_text_style('legend')
900 for my $count (0 .. $tic_count) {
901 my $label = $labels->[$count];
903 my @box = $self->_text_bbox($label, 'legend');
905 my $height = $box[3] - $box[1];
909 if ($height > $max_height) {
910 $max_height = $height;
919 my $min = $self->_get_min_value();
920 my $max = $self->_get_max_value();
921 my $tic_count = $self->_get_y_tics();
923 my $img = $self->_get_image();
924 my $graph_box = $self->_get_graph_box();
925 my $image_box = $self->_get_image_box();
927 my $interval = ($max - $min) / ($tic_count - 1);
929 my %text_info = $self->_text_style('legend')
932 my $show_gridlines = $self->_get_number('horizontal_gridlines');
933 my $tic_distance = int(($graph_box->[3] - $graph_box->[1]) / ($tic_count - 1));
934 for my $count (0 .. $tic_count - 1) {
935 my $x1 = $graph_box->[0] - 5;
936 my $x2 = $graph_box->[0] + 5;
937 my $y1 = $graph_box->[3] - ($count * $tic_distance);
939 my $value = ($count*$interval)+$min;
940 if ($interval < 1 || ($value != int($value))) {
941 $value = sprintf("%.2f", $value);
944 my @box = $self->_text_bbox($value, 'legend')
947 $img->line(x1 => $x1, x2 => $x2, y1 => $y1, y2 => $y1, aa => 1, color => '000000');
950 my $height = $box[3];
952 $img->string(%text_info,
953 x => ($x1 - $width - 3),
954 y => ($y1 + ($height / 2)),
958 if ($show_gridlines) {
960 for (my $i = $graph_box->[0]; $i < $graph_box->[2]; $i += 6) {
963 if ($x2 > $graph_box->[2]) { $x2 = $graph_box->[2]; }
964 $img->line(x1 => $x1, x2 => $x2, y1 => $y1, y2 => $y1, aa => 1, color => '000000');
974 my $img = $self->_get_image();
975 my $graph_box = $self->_get_graph_box();
976 my $image_box = $self->_get_image_box();
978 my $labels = $self->_get_labels();
980 my $tic_count = (scalar @$labels) - 1;
982 my $has_columns = (defined $self->_get_data_series()->{'column'} || defined $self->_get_data_series()->{'stacked_column'});
984 # If we have columns, we want the x-ticks to show up in the middle of the column, not on the left edge
985 my $denominator = $tic_count;
989 my $tic_distance = ($graph_box->[2] - $graph_box->[0]) / ($denominator);
990 my %text_info = $self->_text_style('legend')
993 for my $count (0 .. $tic_count) {
994 my $label = $labels->[$count];
995 my $x1 = $graph_box->[0] + ($tic_distance * $count);
998 $x1 += $tic_distance / 2;
1000 my $y1 = $graph_box->[3] + 5;
1001 my $y2 = $graph_box->[3] - 5;
1003 $img->line(x1 => $x1, x2 => $x1, y1 => $y1, y2 => $y2, aa => 1, color => '000000');
1005 my @box = $self->_text_bbox($label, 'legend')
1008 my $width = $box[2];
1009 my $height = $box[3];
1011 $img->string(%text_info,
1012 x => ($x1 - ($width / 2)),
1013 y => ($y1 + ($height + 5)),
1023 if (!defined $self->_get_data_series() || !keys %{$self->_get_data_series()}) {
1024 return $self->_error("No data supplied");
1027 my $data = $self->_get_data_series();
1028 if (defined $data->{'line'} && !scalar @{$data->{'line'}->[0]->{'data'}}) {
1029 return $self->_error("No values in data series");
1031 if (defined $data->{'column'} && !scalar @{$data->{'column'}->[0]->{'data'}}) {
1032 return $self->_error("No values in data series");
1034 if (defined $data->{'stacked_column'} && !scalar @{$data->{'stacked_column'}->[0]->{'data'}}) {
1035 return $self->_error("No values in data series");
1041 sub _set_column_count { $_[0]->{'column_count'} = $_[1]; }
1042 sub _set_min_value { $_[0]->{'min_value'} = $_[1]; }
1043 sub _set_max_value { $_[0]->{'max_value'} = $_[1]; }
1044 sub _set_image_box { $_[0]->{'image_box'} = $_[1]; }
1045 sub _set_graph_box { $_[0]->{'graph_box'} = $_[1]; }
1046 sub _set_series_counter { $_[0]->{'series_counter'} = $_[1]; }
1047 sub _get_column_count { return $_[0]->{'column_count'} }
1048 sub _get_min_value { return $_[0]->{'min_value'} }
1049 sub _get_max_value { return $_[0]->{'max_value'} }
1050 sub _get_image_box { return $_[0]->{'image_box'} }
1051 sub _get_graph_box { return $_[0]->{'graph_box'} }
1052 sub _get_series_counter { return $_[0]->{'series_counter'} }