e2pdf / vendors / svggraph / StackedLineGraph.php

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

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1	<?php
2	/**
3	* Copyright (C) 2012-2022 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	/**
25	* StackedLineGraph - multiple joined lines with values added together
26	*/
27	class StackedLineGraph extends MultiLineGraph {
28
29	public function __construct($w, $h, $settings, $fixed_settings = [])
30	{
31	$fixed = [ 'single_axis' => true ];
32	$fixed_settings = array_merge($fixed, $fixed_settings);
33	parent::__construct($w, $h, $settings, $fixed_settings);
34	}
35
36	protected function draw()
37	{
38	if($this->getOption('log_axis_y'))
39	throw new \Exception('log_axis_y not supported by StackedLineGraph');
40
41	$body = $this->grid() . $this->underShapes();
42	$plots = [];
43	$stack = [];
44
45	$datasets = $this->multi_graph->getEnabledDatasets();
46	foreach($datasets as $i) {
47	$bnum = 0;
48	$cmd = 'M';
49	$path = new PathData;
50	$fillpath = new PathData;
51	$attr = ['fill' => 'none'];
52	$fill = $this->getOption(['fill_under', $i]);
53	$dash = $this->getOption(['line_dash', $i]);
54	$stroke_width = $this->getOption(['line_stroke_width', $i]);
55	if(!empty($dash))
56	$attr['stroke-dasharray'] = $dash;
57	$attr['stroke-width'] = $stroke_width <= 0 ? 1 : $stroke_width;
58
59	$bottom = [];
60	$point_count = 0;
61	foreach($this->multi_graph[$i] as $item) {
62	$x = $this->gridPosition($item, $bnum);
63	// key might not be an integer, so convert to string for $stack
64	$strkey = serialize($item->key);
65	if(!isset($stack[$strkey]))
66	$stack[$strkey] = 0;
67	if($x !== null) {
68	$x = new Number($x);
69	$bottom[] = [$x, $stack[$strkey]];
70	$y = new Number($this->gridY($stack[$strkey] + $item->value));
71	$stack[$strkey] += $item->value;
72
73	$path->add($cmd, $x, $y);
74	if($fill && $fillpath->isEmpty())
75	$fillpath->add('M', $x, $y, 'L');
76	else
77	$fillpath->add($x, $y);
78
79	// no need to repeat same L command
80	$cmd = $cmd == 'M' ? 'L' : '';
81	if($item->value !== null)
82	++$point_count;
83	}
84	++$bnum;
85	}
86
87	if($point_count > 0) {
88	$attr['d'] = $path;
89	$attr['stroke'] = $this->getColour(null, 0, $i, false, false);
90	if($this->getOption('semantic_classes'))
91	$attr['class'] = 'series' . $i;
92	$graph_line = $this->element('path', $attr);
93	$fill_style = null;
94
95	if($fill) {
96	// complete the fill area with the previous stack total
97	$cmd = 'L';
98	$opacity = $this->getOption(['fill_opacity', $i]);
99	$bpoints = array_reverse($bottom, TRUE);
100	foreach($bpoints as $pos) {
101	list($x, $ypos) = $pos;
102	$y = $this->gridY($ypos);
103	$fillpath->add($x, $y);
104	}
105	$fillpath->add('z');
106	$fill_style = [
107	'fill' => $this->getColour(null, 0, $i),
108	'd' => $fillpath,
109	'stroke' => $attr['fill'],
110	];
111	if($opacity < 1)
112	$fill_style['opacity'] = $opacity;
113	if($this->getOption('semantic_classes'))
114	$fill_style['class'] = 'series' . $i;
115	$graph_line = $this->element('path', $fill_style) . $graph_line;
116	}
117
118	$plots[] = $graph_line;
119	unset($attr['d'], $attr['class'], $fill_style['class']);
120
121	// add the markers and associated legend entries
122	$this->line_styles[$i] = $attr;
123	$this->fill_styles[$i] = $fill_style;
124	$bnum = 0;
125	foreach($this->multi_graph[$i] as $item) {
126	$x = $this->gridPosition($item, $bnum);
127	// key might not be an integer, so convert to string for $stack
128	$strkey = serialize($item->key);
129	if($x !== null) {
130	$y = $this->gridY($stack[$strkey]);
131
132	if($item->value !== null) {
133	$marker_id = $this->markerLabel($i, $bnum, $item, $x, $y);
134	$extra = empty($marker_id) ? null : ['id' => $marker_id];
135	$this->addMarker($x, $y, $item, $extra, $i);
136	}
137	}
138	++$bnum;
139	}
140	}
141	}
142
143	$plots = array_reverse($plots);
144	$all_plots = implode($plots);
145
146	$group = [];
147	$this->clipGrid($group);
148	if($this->getOption('semantic_classes'))
149	$group['class'] = 'series';
150	if(!empty($group))
151	$all_plots = $this->element('g', $group, null, $all_plots);
152
153	$group = [];
154	$shadow_id = $this->defs->getShadow();
155	if($shadow_id !== null)
156	$group['filter'] = 'url(#' . $shadow_id . ')';
157	if(!empty($group))
158	$all_plots = $this->element('g', $group, null, $all_plots);
159
160	list($best_fit_above, $best_fit_below) = $this->bestFitLines();
161	$body .= $best_fit_below;
162	$body .= $all_plots;
163	$body .= $this->overShapes();
164	$body .= $this->axes();
165	$body .= $this->drawMarkers();
166	$body .= $best_fit_above;
167	return $body;
168	}
169
170
171	/**
172	* Returns the maximum value
173	*/
174	public function getMaxValue()
175	{
176	return $this->multi_graph->getMaxSumValue();
177	}
178
179	/**
180	* Returns the minimum value
181	*/
182	public function getMinValue()
183	{
184	return $this->multi_graph->getMinSumValue();
185	}
186
187	/**
188	* Returns the ordering for legend entries
189	*/
190	public function getLegendOrder()
191	{
192	return 'reverse';
193	}
194	}
195
196