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<?php |
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/** |
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* Copyright (C) 2012-2022 Graham Breach |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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/** |
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* For more information, please contact <graham@goat1000.com> |
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*/ |
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|
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namespace Goat1000\SVGGraph; |
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|
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/** |
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* RadarGraph - a line graph that goes around in circles |
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*/ |
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class RadarGraph extends LineGraph { |
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|
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protected $xc; |
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protected $yc; |
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protected $radius; |
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protected $arad; |
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|
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public function __construct($w, $h, array $settings, array $fixed_settings = []) |
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{ |
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// in the case of radar graphs, $label_centre means we want an axis that |
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// ends at N points + 1 |
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$fs = [ |
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'label_centre' => true, |
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'single_axis' => true, |
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]; |
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$fs = array_merge($fs, $fixed_settings); |
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parent::__construct($w, $h, $settings, $fs); |
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} |
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|
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protected function draw() |
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{ |
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$body = $this->grid() . $this->underShapes(); |
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|
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$bnum = 0; |
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$cmd = 'M'; |
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$y_axis = $this->y_axes[$this->main_y_axis]; |
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$dataset = $this->getOption(['dataset', 0], 0); |
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|
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$graph_line = ''; |
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$line_breaks = $this->getOption(['line_breaks', $dataset]); |
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$points = []; |
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$first_point = null; |
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foreach($this->values[$dataset] as $item) { |
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if($line_breaks && $item->value === null && count($points) > 0) { |
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$graph_line .= $this->drawLine($dataset, $points, 0); |
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$points = []; |
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} else { |
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$point_pos = $this->gridPosition($item, $bnum); |
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if($item->value !== null && $point_pos !== null) { |
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$val = $y_axis->position($item->value); |
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$angle = $this->arad + $point_pos / $this->g_height; |
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$x = $this->xc + ($val * sin($angle)); |
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$y = $this->yc + ($val * cos($angle)); |
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$points[] = [$x, $y, $item, $dataset, $bnum]; |
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if($first_point === null) |
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$first_point = $points[0]; |
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} |
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} |
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++$bnum; |
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} |
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|
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// close graph or segment? |
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if($first_point && (!$line_breaks || $first_point[4] == 0)) { |
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$first_point[2] = null; |
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$points[] = $first_point; |
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} |
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|
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$graph_line .= $this->drawLine($dataset, $points, 0); |
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$group = []; |
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if($this->getOption('semantic_classes')) |
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$group['class'] = 'series'; |
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$graph_line = $this->element('g', $group, null, $graph_line); |
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|
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$group = []; |
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$shadow_id = $this->defs->getShadow(); |
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if($shadow_id !== null) |
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$group['filter'] = 'url(#' . $shadow_id . ')'; |
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if(!empty($group)) |
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$graph_line = $this->element('g', $group, null, $graph_line); |
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|
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$body .= $graph_line; |
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$body .= $this->overShapes(); |
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$body .= $this->axes(); |
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$body .= $this->drawMarkers(); |
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return $body; |
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} |
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|
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/** |
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* Fill from centre point |
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*/ |
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protected function fillFrom(Number $x, Number $y) |
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{ |
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return new PathData('M', $this->xc, $this->yc); |
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} |
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|
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/** |
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* Fill to centre point |
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*/ |
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protected function fillTo(Number $x, Number $y) |
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{ |
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return new PathData('L', $this->xc, $this->yc, 'z'); |
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} |
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|
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/** |
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* Finds the grid position for radar graphs, returns NULL if not on graph |
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*/ |
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protected function gridPosition($item, $ikey) |
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{ |
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$gkey = $this->values->associativeKeys() ? $ikey : $item->key; |
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$axis = $this->x_axes[$this->main_x_axis]; |
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$offset = $axis->position($gkey); |
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if($offset >= 0 && $offset < $this->g_width) |
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return $this->getOption('reverse') ? -$offset : $offset; |
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return null; |
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} |
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|
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/** |
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* Returns the $x value as a grid position |
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*/ |
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public function gridX($x, $axis_no = null) |
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{ |
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$p = $this->unitsX($x, $axis_no); |
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return $p; |
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} |
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|
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/** |
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* Returns the $y value as a grid position |
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*/ |
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public function gridY($y, $axis_no = null) |
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{ |
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$p = $this->unitsY($y, $axis_no); |
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return $p; |
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} |
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|
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/** |
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* Returns a DisplayAxisRadar for the round axis |
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*/ |
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protected function getDisplayAxis($axis, $axis_no, $orientation, $type) |
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{ |
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$var = 'main_' . $type . '_axis'; |
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$main = ($axis_no == $this->{$var}); |
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if($orientation == 'h') |
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return new DisplayAxisRadar($this, $axis, $axis_no, $orientation, $type, |
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$main, $this->xc, $this->yc, $this->radius); |
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|
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return new DisplayAxisRotated($this, $axis, $axis_no, $orientation, $type, |
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$main, $this->arad); |
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} |
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|
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/** |
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* Returns the location of an axis |
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*/ |
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protected function getAxisLocation($orientation, $axis_no) |
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{ |
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return [$this->xc, $this->yc]; |
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} |
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|
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/** |
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* Convert X, Y in grid space to radial position |
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*/ |
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public function transformCoords($x, $y) |
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{ |
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$angle = $x / $this->g_height; |
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if($this->getOption('grid_straight')) { |
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// this complicates things... |
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|
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// get all the grid points, div and subdiv |
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$points = array_merge($this->getGridPointsX(0), $this->getSubDivsX(0)); |
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$grid_angles = []; |
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foreach($points as $point) { |
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$grid_angles[] = $point->position / $this->radius; |
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} |
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sort($grid_angles); |
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|
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// find angle between (sub)divisions |
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$div_angle = $grid_angles[1] - $grid_angles[0]; |
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|
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// use trig to find length of Y |
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$a = fmod($angle, $div_angle); |
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$t = ($div_angle / 2) - $a; |
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|
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$y2 = $y * cos($div_angle / 2); |
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$y = $y2 / cos($t); |
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} |
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$angle += $this->arad; |
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$new_x = $this->xc + ($y * sin($angle)); |
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$new_y = $this->yc + ($y * cos($angle)); |
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|
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return [$new_x, $new_y]; |
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} |
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|
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/** |
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* Find the bounding box of the axis text for given axis lengths |
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*/ |
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protected function findAxisBBox($length_x, $length_y, $x_axes, $y_axes) |
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{ |
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$this->xc = $length_x / 2; |
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$this->yc = $length_y / 2; |
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$diameter = min($length_x, $length_y); |
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$length_y = $diameter / 2; |
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$length_x = 2 * M_PI * $length_y; |
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$this->radius = $length_y; |
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foreach($x_axes as $a) |
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$a->setLength($length_x); |
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foreach($y_axes as $a) |
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$a->setLength($length_y); |
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|
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$bb = new BoundingBox($this->width, $this->height, 0, 0); |
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|
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$display_axis = $this->getDisplayAxis($x_axes[0], 0, 'h', 'x'); |
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$axis_m = $display_axis->measure(); |
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$bb->grow($axis_m->x1, $axis_m->y1, $axis_m->x2, $axis_m->y2); |
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|
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$display_axis = $this->getDisplayAxis($y_axes[0], 0, 'v', 'y'); |
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$axis_m = $display_axis->measure(); |
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$bb->grow($axis_m->x1 + $this->xc, $axis_m->y1 + $this->yc, |
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$axis_m->x2 + $this->xc, $axis_m->y2 + $this->yc); |
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|
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$this->radius = null; |
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return [ |
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'min_x' => $bb->x1, 'min_y' => $bb->y1, |
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'max_x' => $bb->x2, 'max_y' => $bb->y2 |
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]; |
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} |
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|
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/** |
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* Draws concentric Y grid lines |
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*/ |
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public function yGrid(&$y_points) |
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{ |
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$path = new PathData; |
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|
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if($this->getOption('grid_straight')) { |
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$grid_angles = []; |
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$points = array_merge($this->getGridPointsX(0), $this->getSubDivsX(0)); |
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foreach($points as $point) { |
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$new_x = $point->position - $this->pad_left; |
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$grid_angles[] = $this->arad + $new_x / $this->radius; |
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} |
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// put the grid angles in order |
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sort($grid_angles); |
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foreach($y_points as $y) { |
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$y = $y->position; |
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$x1 = $this->xc + $y * sin($this->arad); |
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$y1 = $this->yc + $y * cos($this->arad); |
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$path->add('M', $x1, $y1, 'L'); |
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foreach($grid_angles as $a) { |
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$x1 = $this->xc + $y * sin($a); |
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$y1 = $this->yc + $y * cos($a); |
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$path->add($x1, $y1); |
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} |
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$path->add('z'); |
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} |
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} else { |
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$yc_num = new Number($this->yc); |
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foreach($y_points as $y) { |
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$y = $y->position; |
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$p1 = new Number($this->xc - $y); |
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$p2 = new Number($this->xc + $y); |
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$y = new Number($y); |
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$path->add('M', $p1, $yc_num, 'A', $y, $y, 0, 1, 1, $p2, $yc_num); |
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$path->add('M', $p2, $yc_num, 'A', $y, $y, 0, 1, 1, $p1, $yc_num); |
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} |
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} |
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return $path; |
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} |
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|
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/** |
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* Draws radiating X grid lines |
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*/ |
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protected function xGrid(&$x_points) |
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{ |
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$path = new PathData; |
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$xc_num = new Number($this->xc); |
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$yc_num = new Number($this->yc); |
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foreach($x_points as $x) { |
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$x = $x->position - $this->pad_left; |
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$angle = $this->arad + $x / $this->radius; |
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$p1 = $this->radius * sin($angle); |
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$p2 = $this->radius * cos($angle); |
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$path->add('M', $xc_num, $yc_num, 'l', $p1, $p2); |
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} |
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return $path; |
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} |
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|
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/** |
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* Draws the grid behind the graph |
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*/ |
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protected function grid() |
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{ |
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$this->calcAxes(); |
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$this->calcGrid(); |
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if(!$this->getOption('show_grid') || |
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(!$this->getOption('show_grid_h') && !$this->getOption('show_grid_v'))) |
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return ''; |
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|
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$back = $subpath = ''; |
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$back_colour = new Colour($this, $this->getOption('grid_back_colour'), |
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true, true, true); |
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$y_points = $this->getGridPointsY(0); |
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$x_points = $this->getGridPointsX(0); |
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$y_subdivs = $this->getSubDivsY(0); |
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$x_subdivs = $this->getSubDivsX(0); |
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if(!$back_colour->isNone()) { |
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// use the YGrid function to get the path |
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$points = [new GridPoint($this->radius, '', 0)]; |
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$bpath = [ |
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'd' => $this->yGrid($points), |
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'fill' => $back_colour |
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]; |
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if($this->getOption('grid_back_opacity') != 1) |
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$bpath['fill-opacity'] = $this->getOption('grid_back_opacity'); |
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$back = $this->element('path', $bpath); |
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} |
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if($this->getOption('grid_back_stripe')) { |
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// use array of colours if available, otherwise stripe a single colour |
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$colours = is_array($this->getOption('grid_back_stripe_colour')) ? |
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$this->getOption('grid_back_stripe_colour') : |
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[null, $this->getOption('grid_back_stripe_colour')]; |
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$c = 0; |
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$num_colours = count($colours); |
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$num_points = count($y_points); |
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while($c < $num_points - 1) { |
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$cc = $colours[$c % $num_colours]; |
| 341 |
if($cc !== null) { |
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$s_points = [$y_points[$c], $y_points[$c + 1]]; |
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$c1 = new Colour($this, $cc); |
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if($c1->isGradient()) |
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$c1 = $this->remapGradient($cc, $s_points); |
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|
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$bpath = [ |
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'fill' => $c1, |
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'd' => $this->yGrid($s_points), |
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'fill-rule' => 'evenodd', |
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]; |
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if($this->getOption('grid_back_stripe_opacity') != 1) |
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$bpath['fill-opacity'] = $this->getOption('grid_back_stripe_opacity'); |
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$back .= $this->element('path', $bpath); |
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} |
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++$c; |
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} |
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} |
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if($this->getOption('show_grid_subdivisions')) { |
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$subpath_h = new PathData; |
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$subpath_v = new PathData; |
| 362 |
if($this->getOption('show_grid_h')) |
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$subpath_h = $this->yGrid($y_subdivs); |
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if($this->getOption('show_grid_v')) |
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$subpath_v = $this->xGrid($x_subdivs); |
| 366 |
if(!($subpath_h->isEmpty() && $subpath_v->isEmpty())) { |
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$colour_h = $this->getOption('grid_subdivision_colour_h', |
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'grid_subdivision_colour', 'grid_colour_h', 'grid_colour'); |
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$colour_v = $this->getOption('grid_subdivision_colour_v', |
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'grid_subdivision_colour', 'grid_colour_v', 'grid_colour'); |
| 371 |
$dash_h = $this->getOption('grid_subdivision_dash_h', |
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'grid_subdivision_dash', 'grid_dash_h', 'grid_dash'); |
| 373 |
$dash_v = $this->getOption('grid_subdivision_dash_v', |
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'grid_subdivision_dash', 'grid_dash_v', 'grid_dash'); |
| 375 |
$width_h = $this->getOption('grid_subdivision_stroke_width_h', |
| 376 |
'grid_subdivision_stroke_width', 'grid_stroke_width_h', |
| 377 |
'grid_stroke_width'); |
| 378 |
$width_v = $this->getOption('grid_subdivision_stroke_width_v', |
| 379 |
'grid_subdivision_stroke_width', 'grid_stroke_width_v', |
| 380 |
'grid_stroke_width'); |
| 381 |
|
| 382 |
if($dash_h == $dash_v && $colour_h == $colour_v && $width_h == $width_v) { |
| 383 |
$subpath_h->add($subpath_v); |
| 384 |
$subpath = $this->gridLines($subpath_h, $colour_h, $dash_h, $width_h, |
| 385 |
['fill' => 'none']); |
| 386 |
} else { |
| 387 |
$subpath = $this->gridLines($subpath_h, $colour_h, $dash_h, $width_h, |
| 388 |
['fill' => 'none']) . |
| 389 |
$this->gridLines($subpath_v, $colour_v, $dash_v, $width_v, |
| 390 |
['fill' => 'none']); |
| 391 |
} |
| 392 |
} |
| 393 |
} |
| 394 |
|
| 395 |
$path_v = new PathData; |
| 396 |
$path_h = new PathData; |
| 397 |
if($this->getOption('show_grid_h')) |
| 398 |
$path_v = $this->yGrid($y_points); |
| 399 |
if($this->getOption('show_grid_v')) |
| 400 |
$path_h = $this->xGrid($x_points); |
| 401 |
|
| 402 |
$colour_h = $this->getOption('grid_colour_h', 'grid_colour'); |
| 403 |
$colour_v = $this->getOption('grid_colour_v', 'grid_colour'); |
| 404 |
$dash_h = $this->getOption('grid_dash_h', 'grid_dash'); |
| 405 |
$dash_v = $this->getOption('grid_dash_v', 'grid_dash'); |
| 406 |
$width_h = $this->getOption('grid_stroke_width_h', 'grid_stroke_width'); |
| 407 |
$width_v = $this->getOption('grid_stroke_width_v', 'grid_stroke_width'); |
| 408 |
|
| 409 |
if($dash_h == $dash_v && $colour_h == $colour_v && $width_h == $width_v) { |
| 410 |
$path_v->add($path_h); |
| 411 |
$path = $this->gridLines($path_v, $colour_h, $dash_h, $width_h, |
| 412 |
['fill' => 'none']); |
| 413 |
} else { |
| 414 |
$path = $this->gridLines($path_h, $colour_h, $dash_h, $width_h, |
| 415 |
['fill' => 'none']) . |
| 416 |
$this->gridLines($path_v, $colour_v, $dash_v, $width_v, |
| 417 |
['fill' => 'none']); |
| 418 |
} |
| 419 |
|
| 420 |
return $back . $subpath . $path; |
| 421 |
} |
| 422 |
|
| 423 |
/** |
| 424 |
* Sets the grid size as circumference x radius |
| 425 |
*/ |
| 426 |
protected function setGridDimensions() |
| 427 |
{ |
| 428 |
if($this->radius === null) { |
| 429 |
$w = $this->width - $this->pad_left - $this->pad_right; |
| 430 |
$h = $this->height - $this->pad_top - $this->pad_bottom; |
| 431 |
$this->xc = $this->pad_left + $w / 2; |
| 432 |
$this->yc = $this->pad_top + $h / 2; |
| 433 |
$this->radius = min($w, $h) / 2; |
| 434 |
} |
| 435 |
$this->g_height = $this->radius; |
| 436 |
$this->g_width = 2 * M_PI * $this->radius; |
| 437 |
} |
| 438 |
|
| 439 |
/** |
| 440 |
* Calculate the extra details for radar axes |
| 441 |
*/ |
| 442 |
protected function calcAxes() |
| 443 |
{ |
| 444 |
$this->arad = (90 + $this->getOption('start_angle')) * M_PI / 180; |
| 445 |
$this->setOption('axis_right', false); |
| 446 |
parent::calcAxes(); |
| 447 |
} |
| 448 |
|
| 449 |
/** |
| 450 |
* Returns the grid points for a Y-axis |
| 451 |
*/ |
| 452 |
protected function getGridPointsY($axis) |
| 453 |
{ |
| 454 |
$points = $this->y_axes[$axis]->getGridPoints(0); |
| 455 |
foreach($points as $k => $p) |
| 456 |
$points[$k]->position = -$p->position; |
| 457 |
return $points; |
| 458 |
} |
| 459 |
|
| 460 |
/** |
| 461 |
* Returns the subdivisions for a Y-axis |
| 462 |
*/ |
| 463 |
protected function getSubDivsY($axis) |
| 464 |
{ |
| 465 |
$points = $this->y_axes[$axis]->getGridSubdivisions( |
| 466 |
$this->getOption('minimum_subdivision'), |
| 467 |
$this->getOption(['minimum_units_y', $axis]), 0, |
| 468 |
$this->getOption(['subdivision_v', $axis])); |
| 469 |
foreach($points as $k => $p) |
| 470 |
$points[$k]->position = -$p->position; |
| 471 |
return $points; |
| 472 |
} |
| 473 |
|
| 474 |
/** |
| 475 |
* Both of these functions need to exist, just call one from the other |
| 476 |
*/ |
| 477 |
public function guidelinePathAbove($axis, $value, &$x, &$y, &$w, &$h, |
| 478 |
$reverse_length) |
| 479 |
{ |
| 480 |
return $this->guidelinePathBelow($axis, $value, $x, $y, $w, $h, $reverse_length); |
| 481 |
} |
| 482 |
|
| 483 |
/** |
| 484 |
* Draws the path for a guideline |
| 485 |
*/ |
| 486 |
public function guidelinePathBelow($axis, $value, &$x, &$y, &$w, &$h, |
| 487 |
$reverse_length) |
| 488 |
{ |
| 489 |
$coords = new Coords($this); |
| 490 |
$path = new PathData; |
| 491 |
|
| 492 |
$grid_value = 'g' . (is_numeric($value) ? new Number($value) : $value); |
| 493 |
if($axis == 'x') { |
| 494 |
|
| 495 |
// radial line |
| 496 |
$x = $coords->transform($grid_value, 'x', null); |
| 497 |
if($x === null) |
| 498 |
return $path; |
| 499 |
|
| 500 |
if(is_string($h) || $h > 0) { |
| 501 |
$h = $coords->transform($h, 'y'); |
| 502 |
} else { |
| 503 |
$h = $this->radius; |
| 504 |
} |
| 505 |
|
| 506 |
if($reverse_length) { |
| 507 |
list($p1x, $p1y) = $this->transformCoords($x, $this->radius - $h); |
| 508 |
$h = $this->radius; |
| 509 |
} else { |
| 510 |
$p1x = $this->xc; |
| 511 |
$p1y = $this->yc; |
| 512 |
} |
| 513 |
|
| 514 |
list($p2x, $p2y) = $this->transformCoords($x, $h); |
| 515 |
$path->add('M', $p1x, $p1y, 'L', $p2x, $p2y); |
| 516 |
|
| 517 |
// text position values - not very useful though |
| 518 |
$x = min($p1x, $p2x); |
| 519 |
$y = min($p1y, $p2y); |
| 520 |
$w = abs($p2x - $p1x); |
| 521 |
$h = abs($p2y - $p1y); |
| 522 |
|
| 523 |
} else { |
| 524 |
$x = $coords->transform('gl', 'x'); |
| 525 |
$y = $coords->transform($grid_value, 'y', null); |
| 526 |
if($y === null) |
| 527 |
return $path; |
| 528 |
|
| 529 |
if(is_string($w) || $w > 0) { |
| 530 |
$w = $coords->transform($w, 'x'); |
| 531 |
} else { |
| 532 |
$w = $coords->transform('gw', 'x'); |
| 533 |
} |
| 534 |
if($reverse_length) |
| 535 |
$x = $coords->transform('gr', 'x') - $w; |
| 536 |
$h = 0; |
| 537 |
|
| 538 |
// round or segmented line |
| 539 |
if($this->getOption('grid_straight')) { |
| 540 |
$grid_angles = []; |
| 541 |
$points = array_merge($this->getGridPointsX(0), $this->getSubDivsX(0)); |
| 542 |
foreach($points as $point) { |
| 543 |
$new_x = $point->position - $this->pad_left; |
| 544 |
$grid_angles[] = $this->arad + $new_x / $this->radius; |
| 545 |
} |
| 546 |
// put the grid angles in order |
| 547 |
sort($grid_angles); |
| 548 |
$x1 = $this->xc + $y * sin($this->arad); |
| 549 |
$y1 = $this->yc + $y * cos($this->arad); |
| 550 |
$path->add('M', $x1, $y1, 'L'); |
| 551 |
foreach($grid_angles as $a) { |
| 552 |
$x1 = $this->xc + $y * sin($a); |
| 553 |
$y1 = $this->yc + $y * cos($a); |
| 554 |
$path->add($x1, $y1); |
| 555 |
} |
| 556 |
$path->add('z'); |
| 557 |
|
| 558 |
} else { |
| 559 |
$yc_num = new Number($this->yc); |
| 560 |
$p1 = new Number($this->xc - $y); |
| 561 |
$p2 = new Number($this->xc + $y); |
| 562 |
$path->add('M', $p1, $yc_num, 'A', $y, $y, 0, 1, 1, $p2, $yc_num); |
| 563 |
$path->add('M', $p2, $yc_num, 'A', $y, $y, 0, 1, 1, $p1, $yc_num); |
| 564 |
} |
| 565 |
|
| 566 |
// update values for text position |
| 567 |
$x = $this->xc; |
| 568 |
$y = $this->yc - $y; |
| 569 |
$w = 0; |
| 570 |
$h = 0; |
| 571 |
} |
| 572 |
|
| 573 |
return $path; |
| 574 |
} |
| 575 |
|
| 576 |
/** |
| 577 |
* Remaps gradient to make it start at the right radius |
| 578 |
*/ |
| 579 |
protected function remapGradient($g, $points) |
| 580 |
{ |
| 581 |
$gl = new GradientList($this); |
| 582 |
$d = $gl->decompose($g); |
| 583 |
|
| 584 |
$p1 = $points[0]->position; |
| 585 |
$p2 = $points[1]->position; |
| 586 |
$offset = 100 * $p1 / $p2; |
| 587 |
$mult = (100 - $offset) / 100; |
| 588 |
|
| 589 |
$remapped = [ rtrim(implode(':', $d[0]), ':') ]; |
| 590 |
foreach($d as $stop) { |
| 591 |
$stop[0] = $offset + $stop[0] * $mult; |
| 592 |
$remapped[] = rtrim(implode(':', $stop), ':'); |
| 593 |
} |
| 594 |
|
| 595 |
return new Colour($this, $remapped, true, true, true); |
| 596 |
} |
| 597 |
} |
| 598 |
|
| 599 |
|
