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Add support for dependency arrows to Gantt charts.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,104 @@ | ||
| <?php | ||
| /** | ||
| * Copyright (C) 2022 Graham Breach | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| /** | ||
| * For more information, please contact <[email protected]> | ||
| */ | ||
|
|
||
| namespace Goat1000\SVGGraph; | ||
|
|
||
| /** | ||
| * A class for drawing arrows | ||
| */ | ||
| class Arrow { | ||
|
|
||
| protected $a; | ||
| protected $b; | ||
| protected $head_size = 7; | ||
| protected $head_colour = '#000'; | ||
|
|
||
| public function __construct(Point $a, Point $b) | ||
| { | ||
| $this->a = $a; | ||
| $this->b = $b; | ||
| } | ||
|
|
||
| /** | ||
| * Sets the arrow head size (min 2 pixels) | ||
| */ | ||
| public function setHeadSize($size) | ||
| { | ||
| $this->head_size = max(2, $size); | ||
| } | ||
|
|
||
| public function setHeadColour($colour) | ||
| { | ||
| $this->head_colour = $colour; | ||
| } | ||
|
|
||
| /** | ||
| * Returns the arrow head as the ID of a <marker> element | ||
| */ | ||
| protected function getArrowHead($graph) | ||
| { | ||
| $sz = new Number($this->head_size); | ||
| $point = 75; // sharpness of arrow | ||
| $marker = [ | ||
| 'viewBox' => "0 0 {$point} 100", | ||
| 'markerWidth' => $sz, | ||
| 'markerHeight' => $sz, | ||
| 'refX' => $point, | ||
| 'refY' => 50, | ||
| 'orient' => 'auto', | ||
| ]; | ||
| $pd = new PathData('M', 0, 0, 'L', $point, 50, 'L', 0, 100, 'z'); | ||
| $path = [ | ||
| 'd' => $pd, | ||
| 'stroke' => $this->head_colour, | ||
| 'fill' => $this->head_colour, | ||
| ]; | ||
| $marker_content = $graph->element('path', $path); | ||
| return $graph->defs->addElement('marker', $marker, $marker_content); | ||
| } | ||
|
|
||
| /** | ||
| * Returns the PathData for an arrow line | ||
| */ | ||
| protected function getArrowPath() | ||
| { | ||
| return new PathData('M', $this->a, $this->b); | ||
| } | ||
|
|
||
| /** | ||
| * Returns the arrow element | ||
| */ | ||
| public function draw($graph, $style = null) | ||
| { | ||
| $head_id = $this->getArrowHead($graph); | ||
| $p = $this->getArrowPath(); | ||
|
|
||
| $path = [ | ||
| 'd' => $p, | ||
| 'marker-end' => 'url(#' . $head_id . ')', | ||
| 'fill' => 'none', | ||
| ]; | ||
| if(is_array($style)) | ||
| $path = array_merge($style, $path); | ||
| return $graph->element('path', $path); | ||
| } | ||
| } | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| <?php | ||
| /** | ||
| * Copyright (C) 2022 Graham Breach | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Lesser General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| /** | ||
| * For more information, please contact <[email protected]> | ||
| */ | ||
|
|
||
| namespace Goat1000\SVGGraph; | ||
|
|
||
| /** | ||
| * A class for drawing arrows | ||
| */ | ||
| class GanttArrow extends Arrow { | ||
|
|
||
| protected $type = 0; | ||
| protected $vsplit = false; | ||
| protected $space = 10; | ||
|
|
||
| public function __construct(Point $a, Point $b, $wa, $ha, $wb, $hb, $type, $sp) | ||
| { | ||
| switch($type) { | ||
|
|
||
| case 'SS': | ||
| $this->vsplit = ($a->x < $b->x); | ||
| break; | ||
|
|
||
| case 'FF': | ||
| $a->x += $wa; | ||
| $b->x += $wb; | ||
| $this->vsplit = ($a->x > $b->x); | ||
| break; | ||
|
|
||
| case 'SF': | ||
| $b->x += $wb; | ||
| $this->vsplit = ($a->x < $b->x); | ||
| break; | ||
|
|
||
| case 'FS': | ||
| default: | ||
| $a->x += $wa; | ||
| $this->vsplit = ($a->x > $b->x); | ||
| } | ||
| $a->y += $ha; | ||
|
|
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| parent::__construct($a, $b); | ||
| $this->type = $type; | ||
| $this->space = max(5, $sp); | ||
| } | ||
|
|
||
| /** | ||
| * Returns the PathData for an arrow line | ||
| */ | ||
| protected function getArrowPath() | ||
| { | ||
| $p = new PathData('M', $this->a); | ||
| $dx = $this->b->x - $this->a->x; | ||
| $dy = $this->b->y - $this->a->y; | ||
|
|
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| if($dx && $this->vsplit) { | ||
| $v1 = new Number($dy - $this->space); | ||
| $v2 = new Number($this->space); | ||
| $p->add('v', $v1); | ||
| $p->add('h', new Number($dx)); | ||
| $p->add('v', $v2); | ||
|
|
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| } else { | ||
| // if horizontal very small, ignore it | ||
| if(abs($dx) > 0.1) | ||
| $p->add('h', new Number($dx)); | ||
| $p->add('v', new Number($this->b->y - $this->a->y)); | ||
| } | ||
| return $p; | ||
| } | ||
| } | ||
|
|
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