| 1 |
<?php |
| 2 |
/** |
| 3 |
* Copyright (C) 2018-2021 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 |
* Draws the radar graph X axis |
| 26 |
*/ |
| 27 |
class DisplayAxisRadar extends DisplayAxis { |
| 28 |
|
| 29 |
protected $xc; |
| 30 |
protected $yc; |
| 31 |
protected $radius; |
| 32 |
protected $arad; |
| 33 |
protected $text_offset; |
| 34 |
protected $no_axis; |
| 35 |
protected $direction = 1; |
| 36 |
|
| 37 |
/** |
| 38 |
* $orientation = 'h' or 'v' |
| 39 |
* $type = 'x' or 'y' |
| 40 |
* $main = TRUE for the main axis |
| 41 |
*/ |
| 42 |
public function __construct(&$graph, &$axis, $axis_no, $orientation, $type, |
| 43 |
$main, $xc, $yc, $radius) |
| 44 |
{ |
| 45 |
// only use this class for the round axis |
| 46 |
if($orientation != 'h') |
| 47 |
throw new \Exception('DisplayAxisRadar: orientation != "h"'); |
| 48 |
$this->xc = $xc; |
| 49 |
$this->yc = $yc; |
| 50 |
$this->radius = $radius; |
| 51 |
$this->arad = (90 + $graph->getOption('start_angle')) * M_PI / 180; |
| 52 |
$this->text_offset = 0; |
| 53 |
// the radar-only option for hiding axis but showing divisions |
| 54 |
$this->no_axis = !$graph->getOption('show_x_axis'); |
| 55 |
|
| 56 |
// $label_centre = TRUE because the end of the axis is also the start |
| 57 |
parent::__construct($graph, $axis, $axis_no, $orientation, $type, $main, |
| 58 |
true); |
| 59 |
|
| 60 |
// no boxed text because this isn't really a block-labelled axis |
| 61 |
$this->boxed_text = false; |
| 62 |
|
| 63 |
if($graph->getOption('reverse')) |
| 64 |
$this->direction = -1; |
| 65 |
|
| 66 |
// keep text next to axis |
| 67 |
$this->styles['t_location'] = 'axis'; |
| 68 |
} |
| 69 |
|
| 70 |
/** |
| 71 |
* Returns the extents of the axis, relative to where it will be drawn from |
| 72 |
* returns array('x', 'y', 'width', 'height') |
| 73 |
*/ |
| 74 |
public function measure($with_label = true) |
| 75 |
{ |
| 76 |
$bbox = new BoundingBox($this->xc, $this->yc, $this->xc, $this->yc); |
| 77 |
if($this->show_axis) { |
| 78 |
|
| 79 |
// find radius including division marks |
| 80 |
$d = 0; |
| 81 |
if($this->show_divisions) { |
| 82 |
$d_info = $this->getDivisionPathInfo(false, 0, 0, 0); |
| 83 |
if($d_info['pos'] < 0) |
| 84 |
$d = abs($d_info['pos']); |
| 85 |
if($this->show_subdivisions) { |
| 86 |
$s_info = $this->getDivisionPathInfo(true, 0, 0, 0); |
| 87 |
if($s_info['pos'] < 0) { |
| 88 |
$s = abs($s_info['pos']); |
| 89 |
if($s > $d) |
| 90 |
$d = $s; |
| 91 |
} |
| 92 |
} |
| 93 |
} |
| 94 |
$r = $this->radius + $d; |
| 95 |
$bbox->grow($this->xc - $r, $this->yc - $r, $this->xc + $r, $this->yc + $r); |
| 96 |
} |
| 97 |
|
| 98 |
if($this->show_text) { |
| 99 |
list($x_off, $y_off, $opp) = $this->getTextOffset(0, 0, 0, 0, 0, 0, 0); |
| 100 |
|
| 101 |
$points = $this->axis->getGridPoints(0); |
| 102 |
$count = count($points); |
| 103 |
if($this->block_label) |
| 104 |
--$count; |
| 105 |
for($p = 0; $p < $count; ++$p) { |
| 106 |
|
| 107 |
if($points[$p]->blank()) |
| 108 |
continue; |
| 109 |
|
| 110 |
$lbl = $this->measureText($x_off, $y_off, $points[$p], $opp, 0); |
| 111 |
$bbox->grow($lbl['x'], $lbl['y'], $lbl['x'] + $lbl['width'], |
| 112 |
$lbl['y'] + $lbl['height']); |
| 113 |
} |
| 114 |
} |
| 115 |
|
| 116 |
if($with_label && $this->show_label) { |
| 117 |
$lpos = $this->getLabelPosition(); |
| 118 |
$bbox->grow($lpos['x'], $lpos['y'], $lpos['x'] + $lpos['width'], |
| 119 |
$lpos['y'] + $lpos['height']); |
| 120 |
} |
| 121 |
|
| 122 |
return $bbox; |
| 123 |
} |
| 124 |
|
| 125 |
/** |
| 126 |
* Draws the axis line |
| 127 |
*/ |
| 128 |
public function drawAxisLine($x, $y, $len) |
| 129 |
{ |
| 130 |
// the 'show_x_axis' option turns the line off |
| 131 |
if($this->no_axis) |
| 132 |
return ''; |
| 133 |
$points = [new GridPoint($this->radius, '', 0)]; |
| 134 |
$attr = [ |
| 135 |
'stroke' => $this->styles['colour'], |
| 136 |
'd' => $this->graph->yGrid($points), |
| 137 |
'fill' => 'none', |
| 138 |
]; |
| 139 |
|
| 140 |
if($this->styles['stroke_width'] != 1) |
| 141 |
$attr['stroke-width'] = $this->styles['stroke_width']; |
| 142 |
return $this->graph->element('path', $attr); |
| 143 |
} |
| 144 |
|
| 145 |
/** |
| 146 |
* Returns the path for divisions or subdivisions |
| 147 |
*/ |
| 148 |
protected function getDivisionPath($x, $y, $points, $path_info, $level) |
| 149 |
{ |
| 150 |
$path = new PathData; |
| 151 |
$len = -$path_info['sz']; |
| 152 |
$r1 = $this->radius - $path_info['pos']; |
| 153 |
foreach($points as $p) { |
| 154 |
$a = $this->arad + $this->direction * $p->position / $this->radius; |
| 155 |
$x1 = $x + $r1 * sin($a); |
| 156 |
$y1 = $y + $r1 * cos($a); |
| 157 |
$x2 = $len * sin($a); |
| 158 |
$y2 = $len * cos($a); |
| 159 |
$path->add('M', $x1, $y1, 'l', $x2, $y2); |
| 160 |
} |
| 161 |
if(!$path->isEmpty() && $path_info['box']) { |
| 162 |
$points = [new GridPoint($this->radius + $path_info['sz'], '', 0)]; |
| 163 |
$path->add($this->graph->yGrid($points)); |
| 164 |
} |
| 165 |
return $path; |
| 166 |
} |
| 167 |
|
| 168 |
/** |
| 169 |
* Returns the distance from the axis to draw the text |
| 170 |
*/ |
| 171 |
protected function getTextOffset($ax, $ay, $gx, $gy, $g_width, $g_height, $level) |
| 172 |
{ |
| 173 |
list($x, $y, $opposite) = parent::getTextOffset($ax, $ay, $gx, $gy, |
| 174 |
$g_width, $g_height, $level); |
| 175 |
$this->text_offset = $y; |
| 176 |
return [$x, $y, $opposite]; |
| 177 |
} |
| 178 |
|
| 179 |
/** |
| 180 |
* Returns text information: |
| 181 |
* [Text, $font_size, $attr, $anchor, $rcx, $rcy, $angle, $line_spacing] |
| 182 |
*/ |
| 183 |
protected function getTextInfo($x, $y, &$point, $opposite, $level) |
| 184 |
{ |
| 185 |
$a = $this->arad + $this->direction * $point->position / $this->radius; |
| 186 |
$r1 = $this->radius + $this->text_offset; |
| 187 |
$x1 = $this->xc + $this->styles['t_offset_x'] + $r1 * sin($a); |
| 188 |
$y1 = $this->yc + $this->styles['t_offset_y'] + $r1 * cos($a); |
| 189 |
$text_angle = $this->styles['t_angle']; |
| 190 |
|
| 191 |
$tau = 2 * M_PI; |
| 192 |
while($a < 0) |
| 193 |
$a += $tau; |
| 194 |
$a = fmod($a, $tau); |
| 195 |
|
| 196 |
$t_angle = deg2rad($text_angle); |
| 197 |
while($t_angle < 0) |
| 198 |
$t_angle += $tau; |
| 199 |
|
| 200 |
$sector = floor(($a + $t_angle) * 15.999 / $tau) % 16; |
| 201 |
// text anchor depends on angle between text and axis |
| 202 |
$left = $opposite ? 'start' : 'end'; |
| 203 |
$right = $opposite ? 'end' : 'start'; |
| 204 |
$anchor = $right; |
| 205 |
if($sector == 0 || $sector == 7 || $sector == 8 || $sector == 15) |
| 206 |
$anchor = 'middle'; |
| 207 |
elseif($sector > 8) |
| 208 |
$anchor = $left; |
| 209 |
$top = ($opposite ? $sector == 7 || $sector == 8 : |
| 210 |
$sector == 0 || $sector == 15); |
| 211 |
|
| 212 |
$font_size = $this->styles['t_font_size']; |
| 213 |
$line_spacing = $this->styles['t_line_spacing']; |
| 214 |
$svg_text = new Text($this->graph, $this->styles['t_font'], |
| 215 |
$this->styles['t_font_adjust']); |
| 216 |
$baseline = $svg_text->baseline($font_size); |
| 217 |
list($w, $h) = $svg_text->measure($point->getText(), $font_size, 0, |
| 218 |
$line_spacing); |
| 219 |
|
| 220 |
$attr['x'] = $x1; |
| 221 |
if($anchor == 'middle') |
| 222 |
$attr['y'] = $y1 + ($top ? $baseline : 0); |
| 223 |
else |
| 224 |
$attr['y'] = $y1 + $baseline - $h / 2; |
| 225 |
|
| 226 |
$rcx = $rcy = null; |
| 227 |
if($text_angle) { |
| 228 |
$rcx = $x1; |
| 229 |
$rcy = $y1; |
| 230 |
$xform = new Transform; |
| 231 |
$xform->rotate($text_angle, $rcx, $rcy); |
| 232 |
$attr['transform'] = $xform; |
| 233 |
} |
| 234 |
$attr['text-anchor'] = $anchor; |
| 235 |
return [$svg_text, $font_size, $attr, $anchor, $rcx, $rcy, $text_angle, |
| 236 |
$line_spacing]; |
| 237 |
} |
| 238 |
|
| 239 |
/** |
| 240 |
* Returns the label |
| 241 |
*/ |
| 242 |
protected function getLabel($x, $y, $gx, $gy, $g_width, $g_height) |
| 243 |
{ |
| 244 |
// GetLabelPosition returns absolute text position, so ignore $x and $y |
| 245 |
return parent::getLabel(0, 0, $gx, $gy, $g_width, $g_height); |
| 246 |
} |
| 247 |
|
| 248 |
/** |
| 249 |
* Override position correction |
| 250 |
*/ |
| 251 |
protected function getLabelOffset($x, $y, $gx, $gy, $g_width, $g_height) |
| 252 |
{ |
| 253 |
// no need for correction |
| 254 |
return ['x' => $x, 'y' => $y]; |
| 255 |
} |
| 256 |
|
| 257 |
/** |
| 258 |
* Returns the dimensions of the label |
| 259 |
* x, y, width, height = position and size |
| 260 |
* tx, tx = text anchor point |
| 261 |
* angle = text angle |
| 262 |
*/ |
| 263 |
protected function getLabelPosition() |
| 264 |
{ |
| 265 |
$bbox = $this->measure(false); |
| 266 |
$font_size = $this->styles['l_font_size']; |
| 267 |
$line_spacing = $this->styles['l_line_spacing']; |
| 268 |
$svg_text = new Text($this->graph, $this->styles['l_font']); |
| 269 |
$tsize = $svg_text->measure($this->label, $font_size, 0, $line_spacing); |
| 270 |
$baseline = $svg_text->baseline($font_size); |
| 271 |
$space = $this->styles['l_space']; |
| 272 |
|
| 273 |
$width = $tsize[0]; |
| 274 |
$height = $tsize[1]; |
| 275 |
$y = $bbox->y2 + $space; |
| 276 |
$tx = $this->xc; |
| 277 |
$ty = $y + $baseline; |
| 278 |
$x = $tx - $width / 2; |
| 279 |
|
| 280 |
$height += $space; |
| 281 |
$angle = 0; |
| 282 |
$res = compact('x', 'y', 'width', 'height', 'tx', 'ty', 'angle', 'bbox'); |
| 283 |
return $res; |
| 284 |
} |
| 285 |
|
| 286 |
} |
| 287 |
|
| 288 |
|
