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<?php |
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/** |
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* Copyright (C) 2021-2023 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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trait ExplodedPieGraphTrait { |
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|
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protected $pie_exploder = null; |
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protected $explode_amount = 0; |
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|
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/** |
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* Calculates reduced radius of pie |
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*/ |
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protected function calc() |
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{ |
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parent::calc(); |
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$this->explode_amount = $this->pie_exploder->fixRadii($this->radius_x, |
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$this->radius_y); |
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} |
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|
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/** |
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* Returns a single slice of pie |
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*/ |
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protected function getSlice($item, $angle_start, $angle_end, $radius_x, |
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$radius_y, &$attr, $single_slice, $colour_index) |
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{ |
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if($single_slice) |
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return parent::getSlice($item, $angle_start, $angle_end, $radius_x, |
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$radius_y, $attr, $single_slice, $colour_index); |
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|
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// find and apply explosiveness |
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list($xo, $yo) = $this->pie_exploder->getExplode($item, $angle_start + |
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$this->s_angle, $angle_end + $this->s_angle); |
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|
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$translated = $attr; |
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$xform = new Transform; |
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$xform->translate($xo, $yo); |
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if(isset($translated['transform'])) |
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$translated['transform']->add($xform); |
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else |
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$translated['transform'] = $xform; |
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return parent::getSlice($item, $angle_start, $angle_end, $radius_x, |
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$radius_y, $translated, $single_slice, $colour_index); |
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} |
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|
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|
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/** |
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* Returns the position for the label |
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*/ |
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public function dataLabelPosition($dataset, $index, &$item, $x, $y, $w, $h, |
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$label_w, $label_h) |
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{ |
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list($pos, $target) = parent::dataLabelPosition($dataset, $index, $item, |
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$x, $y, $w, $h, $label_w, $label_h); |
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|
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if(isset($this->slice_info[$index])) { |
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list($xo, $yo) = $this->pie_exploder->getExplode($item, |
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$this->slice_info[$index]->start_angle + $this->s_angle, |
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$this->slice_info[$index]->end_angle + $this->s_angle); |
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|
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list($x1, $y1) = explode(' ', $pos); |
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if(is_numeric($x1) && is_numeric($y1)) { |
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$x1 += $xo; |
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$y1 += $yo; |
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} else { |
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$x1 = $xo; |
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$y1 = $yo; |
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} |
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|
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// explode target position too |
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$target[0] += $xo; |
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$target[1] += $yo; |
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|
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$pos = new Number($x1) . ' ' . new Number($y1); |
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} else { |
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$pos = 'middle centre'; |
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} |
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return [$pos, $target]; |
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} |
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|
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/** |
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* Checks that the data are valid |
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*/ |
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protected function checkValues() |
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{ |
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parent::checkValues(); |
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|
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$largest = $this->getMaxValue(); |
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$smallest = $largest; |
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|
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// want smallest non-0 value |
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foreach($this->values[0] as $item) |
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if($item->value < $smallest) |
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$smallest = $item->value; |
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|
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$this->pie_exploder = new PieExploder($this, $smallest, $largest); |
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} |
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} |
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|
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|
