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<?php |
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/** |
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* Copyright (C) 2010-2022 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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class Pie3DGraph extends PieGraph { |
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|
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protected $edge_class = 'Goat1000\\SVGGraph\\PieSliceEdge'; |
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protected $depth; |
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|
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public function __construct($w, $h, array $settings, array $fixed_settings = []) |
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{ |
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$fs = [ |
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// for 100% pie the flat sides are all hidden |
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'draw_flat_sides' => false, |
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]; |
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$fs = array_merge($fs, $fixed_settings); |
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parent::__construct($w, $h, $settings, $fs); |
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|
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$this->depth = $this->getOption('depth'); |
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} |
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|
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protected function draw() |
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{ |
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// modify pad_bottom to make PieGraph do the hard work |
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$pb = $this->pad_bottom; |
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$space = $this->height - $this->pad_top - $this->pad_bottom; |
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if($space < $this->depth) |
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$this->depth = $space / 2; |
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$this->pad_bottom += $this->depth; |
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$this->calc(); |
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$this->pad_bottom = $pb; |
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|
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// see if flat sides are visible |
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if(is_numeric($this->end_angle)) { |
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$start = fmod(deg2rad($this->start_angle), M_PI * 2.0); |
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$end = fmod(deg2rad($this->end_angle), M_PI * 2.0); |
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if($this->getOption('reverse')) { |
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if(($end > M_PI * 0.5 && $end < M_PI * 1.5) || |
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$start < M_PI * 0.5 || $start > M_PI * 1.5) |
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$this->setOption('draw_flat_sides', true); |
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} else { |
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if(($start > M_PI * 0.5 && $start < M_PI * 1.5) || |
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$end < M_PI * 0.5 || $end > M_PI * 1.5) |
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$this->setOption('draw_flat_sides', true); |
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} |
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} |
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return PieGraph::draw(); |
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} |
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|
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/** |
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* Returns the SVG markup to draw all slices |
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*/ |
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protected function drawSlices($slice_list) |
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{ |
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$edge_list = []; |
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foreach($slice_list as $key => $slice) { |
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|
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$edges = $this->getEdges($slice); |
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if(!empty($edges)) |
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$edge_list = array_merge($edge_list, $edges); |
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} |
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|
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// should not be empty - that would mean no sides visible |
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if(empty($edge_list)) |
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return parent::drawSlices($slice_list); |
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|
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usort($edge_list, function($a, $b) { |
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if($a->y == $b->y) |
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return 0; |
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return ($a->y < $b->y ? -1 : 1); |
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}); |
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|
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$edges = []; |
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$overlay = is_array($this->getOption('depth_shade_gradient')); |
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foreach($edge_list as $edge) { |
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|
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$edges[] = $this->getEdge($edge, $this->x_centre, $this->y_centre, |
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$this->depth, $overlay); |
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} |
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|
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return implode($edges) . parent::drawSlices($slice_list); |
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} |
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|
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/** |
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* Returns the edges for the slice that face outwards |
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*/ |
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protected function getEdges($slice) |
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{ |
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$edges = $this->edge_class::getEdges($this, $slice, $this->s_angle, |
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$this->getOption('draw_flat_sides')); |
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return $edges; |
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} |
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|
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/** |
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* Returns an edge markup |
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*/ |
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protected function getEdge($edge, $x_centre, $y_centre, $depth, $overlay) |
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{ |
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$item = $edge->slice['item']; |
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$attr = [ |
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'fill' => $this->getColour($item, $edge->slice['colour_index'], |
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$this->dataset, false, false), |
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'id' => $this->newID(), |
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]; |
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if($this->getOption('show_tooltips')) |
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$this->setTooltip($attr, $item, $this->dataset, $item->key, $item->value, true); |
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if($this->getOption('show_context_menu')) |
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$this->setContextMenu($attr, $this->dataset, $item, true); |
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$this->addLabelClient($this->dataset, $edge->slice['original_position'], $attr); |
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|
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$content = ''; |
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|
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// the gradient overlay uses a clip-path |
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if($overlay) { |
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$clip_id = $this->newID(); |
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$this->defs->add($edge->getClipPath($this, $x_centre, $y_centre, $depth, |
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$clip_id)); |
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|
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// fill without stroking |
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$attr['stroke'] = 'none'; |
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$content = $edge->draw($this, $x_centre, $y_centre, $depth, $attr); |
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|
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// overlay |
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$content .= $this->getEdgeOverlay($x_centre, $y_centre, $depth, $clip_id, $edge); |
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|
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// stroke without filling |
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unset($attr['stroke']); |
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$attr['fill'] = 'none'; |
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} |
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$content .= $edge->draw($this, $x_centre, $y_centre, $depth, $attr); |
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return $this->getLink($item, $item->key, $content); |
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} |
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|
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/** |
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* Overlays the gradient on the pie sides |
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*/ |
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protected function pieExtras() |
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{ |
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// removed the overlay code because it drew over the stroked edges - |
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// overlays are always drawn separately now |
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return ''; |
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} |
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|
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/** |
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* Returns the gradient overlay |
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*/ |
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protected function getEdgeOverlay($x_centre, $y_centre, $depth, $clip_path, $edge) |
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{ |
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// use radius of whole pie unless slice values are set |
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$radius_x = $this->radius_x; |
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$radius_y = $this->radius_y; |
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if($edge->slice['radius_x'] && $edge->slice['radius_y']) { |
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$radius_x = $edge->slice['radius_x']; |
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$radius_y = $edge->slice['radius_y']; |
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} |
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|
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// clip a rect to the edge shape |
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$rect = [ |
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'x' => $x_centre - $radius_x, |
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'y' => $y_centre - $radius_y, |
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'width' => $radius_x * 2.0, |
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'height' => $radius_y * 2.0 + $this->depth + 2.0, |
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'clip-path' => 'url(#' . $clip_path . ')', |
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]; |
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|
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$gradient_id = $this->defs->addGradient($this->getOption('depth_shade_gradient')); |
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if($edge->curve()) { |
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$rect['fill'] = 'url(#' . $gradient_id . ')'; |
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} else { |
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$a = $edge->angle(); |
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if($a > M_PI) |
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$a -= M_PI; |
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|
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$pos = 50 * cos($a); |
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if($pos < 0) |
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$pos = 100 + $pos; |
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|
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$fill = $this->defs->getGradientColour($gradient_id, $pos); |
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$opacity = $fill->opacity(); |
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|
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if($opacity < 0.01 || $fill->isNone()) |
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return ''; |
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if($opacity < 0.99) |
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$rect['opacity'] = $opacity; |
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$rect['fill'] = $fill; |
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} |
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return $this->element('rect', $rect); |
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} |
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} |
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|
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|
