e2pdf / vendors / svggraph / BarAndLineGraph.php

BarAndLineGraph.php in E2Pdf – Export Pdf Tool for WordPress 1.32.49, at vendors/svggraph/BarAndLineGraph.php

261 lines 7.7 KB

Raw Download Zip

1	<?php
2	/**
3	* Copyright (C) 2015-2022 Graham Breach
4	*
5	* This program is free software: you can redistribute it and/or modify
6	* it under the terms of the GNU Lesser General Public License as published by
7	* the Free Software Foundation, either version 3 of the License, or
8	* (at your option) any later version.
9	*
10	* This program is distributed in the hope that it will be useful,
11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	* GNU Lesser General Public License for more details.
14	*
15	* You should have received a copy of the GNU Lesser General Public License
16	* along with this program. If not, see <http://www.gnu.org/licenses/>.
17	*/
18	/**
19	* For more information, please contact <graham@goat1000.com>
20	*/
21
22	namespace Goat1000\SVGGraph;
23
24	class BarAndLineGraph extends GroupedBarGraph {
25
26	protected $linegraph = null;
27	protected $line_datasets = [];
28	protected $bar_datasets = [];
29
30	/**
31	* We need an instance of the LineGraph class
32	*/
33	public function __construct($w, $h, array $settings, array $fixed_settings = [])
34	{
35	parent::__construct($w, $h, $settings, $fixed_settings);
36
37	// prevent repeated labels
38	unset($settings['label']);
39	$this->linegraph = new MultiLineGraph($w, $h, $settings);
40	}
41
42	/**
43	* Draws the bars and lines
44	*/
45	protected function draw()
46	{
47	$body = $this->grid() . $this->underShapes();
48
49	// LineGraph has not been initialised, need to copy in details
50	$copy = ['colours', 'links', 'x_axes', 'y_axes', 'main_x_axis',
51	'main_y_axis', 'legend',
52	// needed for best-fit line support
53	'g_width', 'g_height', 'pad_left', 'pad_top'];
54	foreach($copy as $member)
55	$this->linegraph->{$member} = $this->{$member};
56
57	// keep gradients and patterns synced
58	$this->linegraph->defs =& $this->defs;
59
60	// find the lines
61	$chunk_count = count($this->multi_graph);
62	$lines = $this->getOption('line_dataset');
63	$line_breaks = [];
64	$line_points = [];
65	$line_offsets = [];
66	$points = [];
67	if(!is_array($lines))
68	$lines = [$lines];
69	rsort($lines);
70	foreach($lines as $line) {
71	$line_breaks[$line] = $this->getOption(['line_breaks', $line]);
72	$line_points[$line] = [];
73	$points[$line] = [];
74	}
75	$this->line_datasets = $lines = array_flip($lines);
76
77	$y_axis_pos = $this->height - $this->pad_bottom -
78	$this->y_axes[$this->main_y_axis]->zero();
79	$y_bottom = min($y_axis_pos, $this->height - $this->pad_bottom);
80
81	// set up bars, then find line offsets
82	$this->barSetup();
83	foreach($lines as $k => $l)
84	$line_offsets[$k] = $this->getLineOffset($k);
85
86	// draw bars, store line points
87	$datasets = $this->multi_graph->getEnabledDatasets();
88	$line_dataset = 0;
89	$bars = '';
90	foreach($this->multi_graph as $bnum => $itemlist) {
91	$item = $itemlist[0];
92	$bar_pos = $this->gridPosition($item, $bnum);
93	if($bar_pos !== null) {
94	for($j = 0; $j < $chunk_count; ++$j) {
95	if(!in_array($j, $datasets))
96	continue;
97	$y_axis = $this->datasetYAxis($j);
98	$item = $itemlist[$j];
99
100	if(array_key_exists($j, $lines)) {
101	$line_dataset = $j;
102	if($line_breaks[$line_dataset] && $item->value === null &&
103	count($points[$line_dataset]) > 0) {
104	$line_points[$line_dataset][] = $points[$line_dataset];
105	$points[$line_dataset] = [];
106	} elseif($item->value !== null) {
107	$x = $bar_pos + $line_offsets[$line_dataset];
108	$y = $this->gridY($item->value, $y_axis);
109	$points[$line_dataset][] = [$x, $y, $item, $line_dataset, $bnum];
110	}
111	continue;
112	}
113
114	$this->setBarLegendEntry($j, $bnum, $item);
115	$bars .= $this->drawBar($item, $bnum, 0, $y_axis, $j);
116	}
117	}
118	}
119
120	foreach($points as $line_dataset => $line) {
121	if(!empty($line))
122	$line_points[$line_dataset][] = $line;
123	}
124
125	// draw lines clipped to grid
126	$graph_line = '';
127	foreach($line_points as $dataset => $points) {
128	foreach($points as $p) {
129	$graph_line .= $this->drawLine($dataset, $p, $y_bottom);
130	}
131	}
132	$group = [];
133	$this->clipGrid($group);
134	list($best_fit_above, $best_fit_below) = $this->linegraph->bestFitLines();
135	$bars .= $best_fit_below;
136	$bars .= $this->element('g', $group, null, $graph_line);
137
138	$group = [];
139	if($this->getOption('semantic_classes'))
140	$group['class'] = 'series';
141	$shadow_id = $this->defs->getShadow();
142	if($shadow_id !== null)
143	$group['filter'] = 'url(#' . $shadow_id . ')';
144	if(!empty($group))
145	$bars = $this->element('g', $group, null, $bars);
146	$body .= $bars;
147
148	$body .= $this->overShapes();
149	$body .= $this->axes();
150
151	// add in the markers created by line graph
152	$body .= $this->linegraph->drawMarkers();
153	$body .= $best_fit_above;
154
155	return $body;
156	}
157
158	/**
159	* Sets up bar details
160	*/
161	protected function barSetup()
162	{
163	parent::barSetup();
164	$datasets = $this->multi_graph->getEnabledDatasets();
165	$chunk_count = count($datasets);
166	$bar = 0;
167	foreach($datasets as $i) {
168	// reduce chunk count for lines, add bars to list
169	if(array_key_exists($i, $this->line_datasets))
170	--$chunk_count;
171	else
172	$this->bar_datasets[$i] = $bar++;
173	}
174
175	if(count($this->bar_datasets) < 1)
176	throw new \Exception('No bar datasets enabled');
177
178	list($chunk_width, $bspace, $chunk_unit_width) =
179	$this->barPosition($this->getOption('bar_width'), $this->getOption('bar_width_min'),
180	$this->x_axes[$this->main_x_axis]->unit(), $chunk_count, $this->getOption('bar_space'),
181	$this->getOption('group_space'));
182	$this->group_bar_spacing = $chunk_unit_width;
183	$this->setBarWidth($chunk_width, $bspace);
184	}
185
186	/**
187	* Fills in the x and width of bar
188	*/
189	protected function barX($item, $index, &$bar, $axis, $dataset)
190	{
191	$bar_x = $this->gridPosition($item, $index);
192	if($bar_x === null)
193	return null;
194
195	// relative position of bars stored in barSetup()
196	$bar['x'] = $bar_x + $this->calculated_bar_space +
197	($this->bar_datasets[$dataset] * $this->group_bar_spacing);
198	$bar['width'] = $this->calculated_bar_width;
199	return $bar_x;
200	}
201
202	/**
203	* Return box or line for legend
204	*/
205	public function drawLegendEntry($x, $y, $w, $h, $entry)
206	{
207	if(isset($entry->style['line_style']))
208	return $this->linegraph->drawLegendEntry($x, $y, $w, $h, $entry);
209	return parent::drawLegendEntry($x, $y, $w, $h, $entry);
210	}
211
212	/**
213	* Draws this graph's data labels, and the line graph's data labels
214	*/
215	protected function drawDataLabels()
216	{
217	$labels = parent::drawDataLabels();
218	$labels .= $this->linegraph->drawDataLabels();
219	return $labels;
220	}
221
222	/**
223	* Returns the normal dataset order
224	*/
225	public function getLegendOrder()
226	{
227	$datasets = count($this->multi_graph);
228	return range(0, $datasets - 1);
229	}
230
231	/**
232	* Returns the horizontal offset of the line relative to the grid
233	*/
234	public function getLineOffset($dataset)
235	{
236	if($this->getOption('datetime_keys'))
237	return 0;
238
239	$offset = 0;
240	$o = $this->getOption(['line_bar', $dataset]);
241	if(is_numeric($o) && in_array($o, $this->bar_datasets)) {
242	$offset = $this->calculated_bar_space +
243	($this->dataset_offsets[$o] * $this->group_bar_spacing) +
244	($this->calculated_bar_width / 2);
245	} else {
246	$g_width = $this->x_axes[$this->main_x_axis]->unit();
247	$offset = $g_width / 2;
248	}
249	return $offset;
250	}
251
252	/**
253	* Draws a single line
254	*/
255	public function drawLine($dataset, $points, $y_bottom)
256	{
257	return $this->linegraph->drawLine($dataset, $points, $y_bottom);
258	}
259	}
260
261