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<?php |
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/** |
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* Copyright (C) 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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* A class for drawing arrows |
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*/ |
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class GanttArrow extends Arrow { |
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|
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protected $type = 0; |
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protected $vsplit = false; |
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protected $space = 10; |
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|
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public function __construct(Point $a, Point $b, $wa, $ha, $wb, $hb, $type, $sp) |
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{ |
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switch($type) { |
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|
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case 'SS': |
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$this->vsplit = ($a->x < $b->x); |
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break; |
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|
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case 'FF': |
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$a->x += $wa; |
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$b->x += $wb; |
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$this->vsplit = ($a->x > $b->x); |
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break; |
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|
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case 'SF': |
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$b->x += $wb; |
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$this->vsplit = ($a->x < $b->x); |
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break; |
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|
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case 'FS': |
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default: |
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$a->x += $wa; |
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$this->vsplit = ($a->x > $b->x); |
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} |
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$a->y += $ha; |
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|
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// only start horizontal if the first element has some width |
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if($wa < 1) |
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$this->vsplit = true; |
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|
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parent::__construct($a, $b); |
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$this->type = $type; |
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$this->space = max(5, $sp); |
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} |
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|
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/** |
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* Returns the PathData for an arrow line |
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*/ |
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protected function getArrowPath() |
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{ |
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$p = new PathData('M', $this->a); |
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$dx = $this->b->x - $this->a->x; |
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$dy = $this->b->y - $this->a->y; |
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|
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if($dx && $this->vsplit) { |
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$v1 = new Number($dy - $this->space); |
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$v2 = new Number($this->space); |
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$p->add('v', $v1); |
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$p->add('h', new Number($dx)); |
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$p->add('v', $v2); |
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|
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} else { |
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// if horizontal very small, ignore it |
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if(abs($dx) > 0.1) |
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$p->add('h', new Number($dx)); |
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$p->add('v', new Number($this->b->y - $this->a->y)); |
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} |
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return $p; |
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} |
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} |
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|
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|
