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<?php |
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/** |
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* Copyright (C) 2011-2022 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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* MultiScatterGraph - points with axes and grid |
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*/ |
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class MultiScatterGraph extends PointGraph { |
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|
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use MultiGraphTrait; |
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|
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public function __construct($w, $h, array $settings, array $fixed_settings = []) |
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{ |
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$fs = [ |
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'repeated_keys' => 'accept', |
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'require_integer_keys' => false, |
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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() . $this->underShapes(); |
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|
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// a scatter graph without markers is empty! |
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if($this->getOption('marker_size') == 0) |
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$this->setOption('marker_size', 1); |
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|
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$datasets = $this->multi_graph->getEnabledDatasets(); |
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foreach($datasets as $i) { |
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$bnum = 0; |
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$axis = $this->datasetYAxis($i); |
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foreach($this->multi_graph[$i] as $item) { |
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$x = $this->gridPosition($item, $bnum); |
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if($item->value !== null && $x !== null) { |
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$y = $this->gridY($item->value, $axis); |
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if($y !== null) { |
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$marker_id = $this->markerLabel($i, $bnum, $item, $x, $y); |
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$extra = empty($marker_id) ? null : ['id' => $marker_id]; |
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$this->addMarker($x, $y, $item, $extra, $i); |
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} |
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} |
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++$bnum; |
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} |
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} |
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|
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list($best_fit_above, $best_fit_below) = $this->bestFitLines(); |
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$body .= $best_fit_below; |
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$body .= $this->overShapes(); |
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$body .= $this->axes(); |
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$body .= $this->drawMarkers(); |
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$body .= $best_fit_above; |
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return $body; |
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} |
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|
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/** |
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* Checks that the data produces a 2-D plot |
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*/ |
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protected function checkValues() |
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{ |
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parent::checkValues(); |
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|
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// using force_assoc makes things work properly |
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if($this->values->associativeKeys()) |
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$this->setOption('force_assoc', true); |
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} |
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} |
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|
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