e2pdf / vendors / svggraph / ArrayGraph.php

ArrayGraph.php in E2Pdf – Export Pdf Tool for WordPress 1.32.23, at vendors/svggraph/ArrayGraph.php

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1	<?php
2	/**
3	* Copyright (C) 2019-2020 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 ArrayGraph extends Graph {
25
26	use MultiGraphTrait {
27	values as mgValues;
28	}
29
30	protected $inner_options;
31	protected $inner_types;
32	protected $raw_data;
33	protected $raw_settings;
34
35	public function __construct($w, $h, array $settings, array $fixed_settings = [])
36	{
37	$this->raw_settings = $settings;
38	parent::__construct($w, $h, $settings, $fixed_settings);
39	}
40
41	/**
42	* Stores raw values to make it easier to set up subgraphs
43	*/
44	public function values($values)
45	{
46	$this->raw_data = $values;
47	return $this->mgValues($values);
48	}
49
50	/**
51	* Now create the subgraphs
52	*/
53	public function checkValues()
54	{
55	parent::checkValues();
56	$opt = [
57	'keep_colour_order' => true,
58	'back_stroke_width' => 0,
59	'back_colour' => 'none',
60	'back_shadow' => 0,
61	'title' => null,
62	];
63	$opt = array_merge($this->raw_settings, $opt);
64
65	$graphs = $this->getLayout();
66	foreach($graphs as $graph) {
67	$s = new Subgraph($graph['type'], $graph['x'], $graph['y'],
68	$graph['w'], $graph['h'], array_merge($opt, $graph['options']));
69	$s->values($this->raw_data);
70	$s->setColours($this->colours);
71	$this->subgraphs[] = $s;
72	}
73	}
74
75	public function draw()
76	{
77	// all drawing is done by subgraphs
78	return $this->underShapes() . $this->overShapes();
79	}
80
81	/**
82	* Returns the list of graphs to be drawn and where to draw them
83	*/
84	private function getLayout()
85	{
86	// find which datasets are going in each graph
87	$enabled_datasets = $this->multi_graph->getEnabledDatasets();
88	$graph_datasets = $this->getOption('array_graph_dataset');
89	if($graph_datasets === null) {
90
91	// default is one dataset per graph
92	$graph_datasets = [];
93	foreach($enabled_datasets as $d) {
94	$graph_datasets[] = [$d];
95	}
96	} else {
97
98	// need to check each of the selected datasets is enabled
99	$new_outer = [];
100	foreach($graph_datasets as $gd) {
101	$new_inner = [];
102	if(is_array($gd)) {
103	foreach($gd as $d) {
104	if(!in_array($d, $enabled_datasets))
105	continue;
106	$new_inner[] = $d;
107	}
108	} else {
109	if(!in_array($gd, $enabled_datasets))
110	continue;
111	$new_inner[] = $gd;
112	}
113
114	if(count($new_inner) > 0)
115	$new_outer[] = $new_inner;
116	}
117	$graph_datasets = $new_outer;
118	}
119
120	$graph_count = count($graph_datasets);
121	$cols = $this->getOption('array_graph_columns');
122	if($cols === null \|\| $cols === 'auto') {
123	$cols = $this->calcCols($graph_count);
124	} else {
125	$cols = (int)$cols;
126	if($cols < 1)
127	throw new \Exception('Invalid array_graph_columns value: ' . $cols);
128	if($this->width / $cols < 20)
129	throw new \Exception('Option array_graph_columns too large: ' . $cols);
130	}
131	$rows = ceil($graph_count / $cols);
132	$w = $this->width / $cols;
133	$h = $this->height / $rows;
134
135	$inner_options = $this->getOption('array_graph_options');
136	if($inner_options !== null) {
137	if(!is_array($inner_options))
138	throw new \Exception('Option array_graph_options is not an array');
139
140	// check if it is an array of arrays
141	if(!isset($inner_options[0]) \|\| !is_array($inner_options[0])) {
142
143	// put single array into outer array
144	$inner_options = [ $inner_options ];
145	}
146	} else {
147
148	// no special options
149	$inner_options = [ [ ] ];
150	}
151	$o_count = count($inner_options);
152
153	$index = 0;
154	$layout = [];
155	$last_row_count = $graph_count % $cols;
156	$last_row_offset = 0;
157	$align = $this->getOption('array_graph_align');
158	if($last_row_count && $align != 'left') {
159	$mult = $align == 'right' ? 1.0 : 0.5;
160	$last_row_offset = ($this->width - $last_row_count * $w) * $mult;
161	}
162
163	foreach($graph_datasets as $d) {
164	$col = $index % $cols;
165	$row = floor($index / $cols);
166	$x_offset = ($row == $rows - 1 ? $x_offset = $last_row_offset : 0);
167
168	$options = $inner_options[$index % $o_count];
169	$options['dataset'] = $d;
170
171	$g = [
172	'x' => $x_offset + $w * $col,
173	'y' => $h * $row,
174	'w' => $w,
175	'h' => $h,
176	'type' => $this->getOption(['array_graph_type', $index], ['@', 'PieGraph']),
177	'options' => $options,
178	];
179
180	$layout[] = $g;
181	++$index;
182	}
183
184	return $layout;
185	}
186
187	/**
188	* Calculates the best number of columns
189	*/
190	private function calcCols($count)
191	{
192	if($count === 1)
193	return 1;
194
195	$w = $this->width;
196	$h = $this->height;
197	if($count === 2)
198	return $w > $h ? 2 : 1;
199
200	$matches = [];
201	for($c = 1; $c <= $count; ++$c) {
202	$r = ceil($count / $c);
203	$bw = $w / $c;
204	$bh = $h / $r;
205	$area = $bw * $bh;
206	$aspect = $bw < $bh ? $bw / $h : $bh / $bw;
207	$score = $area * ($aspect + 1);
208
209	$matches[] = [
210	'c' => $c,
211	'r' => $r,
212	'area' => $area,
213	'aspect' => $aspect,
214	'score' => $score,
215	];
216	}
217
218	usort($matches, function($a, $b) { return $a['score'] - $b['score']; });
219	$winner = array_pop($matches);
220	return $winner['c'];
221	}
222
223	}
224
225