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<?php |
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/** |
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* Copyright (C) 2019 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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class PolyLine extends Shape { |
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protected $element = 'polyline'; |
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protected $required = ['points']; |
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|
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public function __construct(&$attrs, $depth) |
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{ |
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parent::__construct($attrs, $depth); |
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if(!is_array($this->attrs['points'])) |
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$this->attrs['points'] = explode(' ', $this->attrs['points']); |
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$count = count($this->attrs['points']); |
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if($count < 4 || $count % 2 == 1) |
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throw new \Exception('Shape must have at least 2 pairs of points'); |
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} |
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|
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/** |
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* Override to transform pairs of points |
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*/ |
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protected function transformCoordinates(&$attributes) |
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{ |
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$count = count($attributes['points']); |
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for($i = 0; $i < $count; $i += 2) { |
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$x = $attributes['points'][$i]; |
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$y = $attributes['points'][$i + 1]; |
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$coords = $this->coords->transformCoords($x, $y); |
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$attributes['points'][$i] = $coords[0]; |
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$attributes['points'][$i + 1] = $coords[1]; |
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} |
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} |
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|
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/** |
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* Override to build the points attribute |
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*/ |
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protected function drawElement(&$graph, &$attributes) |
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{ |
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$attributes['points'] = implode(' ', $attributes['points']); |
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return parent::drawElement($graph, $attributes); |
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} |
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} |
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