e2pdf / vendors / svggraph / HorizontalBarGraphTrait.php

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

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1	<?php
2	/**
3	* Copyright (C) 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	trait HorizontalBarGraphTrait {
25
26	use BarGraphTrait;
27
28	public function __construct($w, $h, array $settings, array $fixed_settings = [])
29	{
30	// backwards compatibility
31	if(isset($settings['show_bar_labels']) && !isset($settings['show_data_labels']))
32	$settings['show_data_labels'] = $settings['show_bar_labels'];
33
34	$fs = ['label_centre' => !isset($settings['datetime_keys'])];
35	$fs = array_merge($fs, $fixed_settings);
36	parent::__construct($w, $h, $settings, $fs);
37	}
38
39	/**
40	* Returns the height of a bar rectangle
41	*/
42	protected function barWidth()
43	{
44	if(is_numeric($this->getOption('bar_width')) && $this->getOption('bar_width') >= 1)
45	return $this->getOption('bar_width');
46	$unit_h = $this->y_axes[$this->main_y_axis]->unit();
47	$bh = $unit_h - $this->getOption('bar_space');
48	return max(1, $bh, $this->getOption('bar_width_min'));
49	}
50
51	/**
52	* Fills in the x-position and width of a bar
53	* @param number $value bar value
54	* @param array &$bar bar element array [out]
55	* @param number $start bar start value
56	* @return number unclamped bar position
57	*/
58	protected function barY($value, &$bar, $start = null)
59	{
60	if($start)
61	$value += $start;
62
63	$startpos = $start === null ? $this->originX() : $this->gridX($start);
64	if($startpos === null)
65	$startpos = $this->originX();
66	$pos = $this->gridX($value);
67	if($pos === null) {
68	$bar['width'] = 0;
69	} else {
70	$l1 = $this->clampHorizontal($startpos);
71	$l2 = $this->clampHorizontal($pos);
72	$bar['x'] = min($l1, $l2);
73	$bar['width'] = abs($l1-$l2);
74	}
75	return $pos;
76	}
77
78	/**
79	* Fills in the y and height of bar
80	*/
81	protected function barX($item, $index, &$bar, $axis, $dataset)
82	{
83	$bar_y = $this->gridPosition($item, $index);
84	if($bar_y === null)
85	return null;
86
87	$axis = $this->y_axes[$this->main_y_axis];
88	if($axis->reversed())
89	$bar['y'] = $bar_y - $this->calculated_bar_space - $this->calculated_bar_width;
90	else
91	$bar['y'] = $bar_y + $this->calculated_bar_space;
92	$bar['height'] = $this->calculated_bar_width;
93	return $bar_y;
94	}
95
96	/**
97	* Returns the space before a bar
98	*/
99	protected function barSpace($bar_width)
100	{
101	return max(0, ($this->y_axes[$this->main_y_axis]->unit() - $bar_width) / 2);
102	}
103
104	/**
105	* Override to check minimum space requirement
106	*/
107	protected function addDataLabel($dataset, $index, &$element, &$item,
108	$x, $y, $w, $h, $content = null, $duplicate = true)
109	{
110	if($w < $this->getOption(['data_label_min_space', $dataset]))
111	return false;
112	return parent::addDataLabel($dataset, $index, $element, $item, $x, $y,
113	$w, $h, $content, $duplicate);
114	}
115
116	/**
117	* Returns the position for a data label
118	*/
119	public function dataLabelPosition($dataset, $index, &$item, $x, $y, $w, $h,
120	$label_w, $label_h)
121	{
122	list($pos, $target) = parent::dataLabelPosition($dataset, $index, $item,
123	$x, $y, $w, $h, $label_w, $label_h);
124	$bpos = $this->getOption('bar_label_position');
125	if(!empty($bpos))
126	$pos = $bpos;
127
128	if($label_w > $w && Graph::isPositionInside($pos))
129	$pos = str_replace(['left','centre','right'], 'outside right inside', $pos);
130
131	// flip sides for negative values
132	if($item !== null && $item->value < 0) {
133	if(strpos($pos, 'right') !== false)
134	$pos = str_replace('right', 'left', $pos);
135	elseif(strpos($pos, 'left') !== false)
136	$pos = str_replace('left', 'right', $pos);
137	}
138	return [$pos, $target];
139	}
140
141	/**
142	* Returns the ordering for legend entries
143	*/
144	public function getLegendOrder()
145	{
146	return 'reverse';
147	}
148	}
149
150