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<?php |
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/** |
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* Copyright (C) 2020-2022 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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* An axis with multiple levels of divisions |
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*/ |
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class DisplayAxisLevels extends DisplayAxis { |
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|
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protected $level_count; |
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protected $levels; |
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|
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/** |
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* Pass all these to parent constructor |
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*/ |
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public function __construct(&$graph, &$axis, $axis_no, $orientation, $type, |
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$main, $label_centre) |
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{ |
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parent::__construct($graph, $axis, $axis_no, $orientation, $type, $main, |
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$label_centre); |
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|
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if(!$this->show_text) |
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{ |
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$this->levels = [null]; |
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$this->level_count = 1; |
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return; |
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} |
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|
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$levels = $graph->getOption(['axis_levels_' . $orientation, $axis_no]); |
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if(!is_array($levels)) |
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$levels = array_fill(0, $levels, null); |
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$this->levels = $levels; |
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$this->level_count = count($levels); |
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} |
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|
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/** |
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* Returns the extents of the axis, relative to where it will be drawn from |
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* returns BoundingBox |
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*/ |
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public function measure($with_label = true) |
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{ |
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if($this->level_count <= 1) |
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return parent::measure($with_label); |
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|
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$bbox = new BoundingBox(0, 0, 0, 0); |
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for($i = 0; $i < $this->level_count; ++$i) { |
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$dbox = $this->getDivisionsBBox($i); |
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$tbox = $this->getTextBBox($i); |
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if($this->orientation == 'h') { |
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$dbox->flipY(); |
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if($this->axis_no > 0) { |
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$dbox->offset(0, $bbox->y1); |
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$tbox->offset(0, $bbox->y1); |
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} else { |
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$dbox->offset(0, $bbox->y2); |
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$tbox->offset(0, $bbox->y2); |
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} |
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} else { |
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if($this->axis_no > 0) { |
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$dbox->offset($bbox->x2, 0); |
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$tbox->offset($bbox->x2, 0); |
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} else { |
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$dbox->offset($bbox->x1, 0); |
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$tbox->offset($bbox->x1, 0); |
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} |
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} |
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// store the text box for this level |
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$this->levels[$i]['text_box'] = $tbox; |
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|
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$bbox->growBox($tbox); |
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$bbox->growBox($dbox); |
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} |
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|
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if($with_label && $this->show_label) { |
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$lpos = $this->getLabelPosition(); |
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$bbox->grow($lpos['x'], $lpos['y'], $lpos['x'] + $lpos['width'], |
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$lpos['y'] + $lpos['height']); |
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} |
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$bbox = $this->addOffset($bbox); |
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|
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return $bbox; |
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} |
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|
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/** |
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* Returns the bounding box of the text |
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*/ |
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protected function getTextBBox($level) |
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{ |
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if($this->level_count <= 1 || !$this->boxed_text) |
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return parent::getTextBBox($level); |
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|
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$bbox = new BoundingBox(0, 0, 0, 0); |
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list($x_off, $y_off, $opp) = $this->getTextOffset(0, 0, 0, 0, 0, 0, $level); |
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$t_offset = ($this->orientation == 'h' ? $x_off : $y_off); |
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if($this->axis->reversed()) |
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$t_offset = -$t_offset; |
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$length = $this->axis->getLength(); |
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|
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$points = $this->axis->getGridPoints(0); |
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$lpoints = $this->getPointsForLevel($points, $level); |
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$positions = $this->getTextPositions(0, 0, $x_off, $y_off, $lpoints, null); |
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$pcount = count($positions); |
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for($p = 0; $p < $pcount; ++$p) { |
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$point = $lpoints[$p]; |
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if(!$this->pointTextVisible($point, $length, $t_offset)) |
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continue; |
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if(!$point->blank($level)) { |
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$pos = $positions[$p]; |
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$lbl = $this->measureText($pos['x'], $pos['y'], $point, $opp, $level); |
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$bbox->grow($lbl['x'], $lbl['y'], $lbl['x'] + $lbl['width'], |
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$lbl['y'] + $lbl['height']); |
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} |
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} |
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return $bbox; |
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} |
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|
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/** |
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* Draws the axis text labels |
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*/ |
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public function drawText($x, $y, $gx, $gy, $g_width, $g_height) |
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{ |
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if($this->level_count <= 1) |
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return parent::drawText($x, $y, $gx, $gy, $g_width, $g_height); |
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|
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list($x_offset, $y_offset, $opposite) = $this->getTextOffset($x, $y, |
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$gx, $gy, $g_width, $g_height, 0); |
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|
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$t_offset = ($this->orientation == 'h' ? $x_offset : $y_offset); |
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if($this->axis->reversed()) |
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$t_offset = -$t_offset; |
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|
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// measure function fills in text locations |
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$this->measure(); |
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$labels = ''; |
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$anchor = null; |
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$points = $this->axis->getGridPoints(0); |
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$length = $this->axis->getLength(); |
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|
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for($i = 0; $i < $this->level_count; ++$i) { |
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$count = count($points); |
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if($this->block_label) |
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--$count; |
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|
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list($x_offset, $y_offset, $opposite) = $this->getTextOffset($x, $y, |
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$gx, $gy, $g_width, $g_height, $i); |
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$x1 = $x_offset; |
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$y1 = $y_offset; |
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|
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$tbox = $this->levels[$i]['text_box']; |
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if($this->orientation == 'h') { |
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if($this->axis_no > 0) |
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$y1 = $y_offset + $tbox->y2; |
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else |
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$y1 = $y_offset + $tbox->y1; |
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switch($this->styles['t_align']) { |
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case 'left': |
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$anchor = 'start'; |
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break; |
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case 'right': |
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$anchor = 'end'; |
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break; |
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} |
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} else { |
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if($this->axis_no > 0) |
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$x1 = $x_offset + $tbox->x1; |
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else |
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$x1 = $x_offset + $tbox->x2; |
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switch($this->styles['t_align']) { |
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case 'left': |
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if(!$opposite) { |
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$anchor = 'start'; |
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$x1 = $tbox->x1; |
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} |
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break; |
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case 'centre': |
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$x1 = ($tbox->x1 + $tbox->x2) / 2; |
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$anchor = 'middle'; |
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break; |
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} |
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} |
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|
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$lpoints = $this->getPointsForLevel($points, $i); |
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$positions = $this->getTextPositions($x, $y, $x1, $y1, $lpoints, $anchor); |
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$pcount = count($positions); |
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for($p = 0; $p < $pcount; ++$p) { |
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$point = $lpoints[$p]; |
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if(!$this->pointTextVisible($point, $length, $t_offset)) |
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continue; |
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$pos = $positions[$p]; |
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$labels .= $this->getText($pos['x'], $pos['y'], $point, $opposite, $i, $anchor); |
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} |
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} |
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if($labels != '') { |
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$group = [ |
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'font-family' => $this->styles['t_font'], |
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'font-size' => $this->styles['t_font_size'], |
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'fill' => $this->styles['t_colour'], |
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]; |
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$weight = $this->styles['t_font_weight']; |
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if($weight != 'normal' && $weight !== null) |
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$group['font-weight'] = $weight; |
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|
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$labels = $this->graph->element('g', $group, null, $labels); |
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} |
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|
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if($this->show_label) |
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$labels .= $this->getLabel($x, $y, $gx, $gy, $g_width, $g_height); |
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|
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return $labels; |
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} |
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|
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/** |
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* Draws the axis divisions |
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*/ |
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public function drawDivisions($x, $y, $g_width, $g_height) |
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{ |
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// parent can do simple divisions |
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if($this->level_count <= 1 || !$this->boxed_text) |
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return parent::drawDivisions($x, $y, $g_width, $g_height); |
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|
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$path = ''; |
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$points = $this->axis->getGridPoints(0); |
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$x_offset = $y_offset = 0; |
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|
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// direction of offset depends on h/v and axis number |
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$direction = ($this->orientation == 'v' ? -1 : 1); |
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if($this->axis_no > 0) |
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$direction = -$direction; |
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|
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for($i = 0; $i < $this->level_count; ++$i) { |
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$path_info = $this->getDivisionPathInfo(false, $g_width, $g_height, $i); |
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if($path_info === null) |
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continue; |
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|
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$lpoints = $this->getPointsForLevel($points, $i); |
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$path .= $this->getDivisionPath($x + $x_offset, $y + $y_offset, $lpoints, |
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$path_info, $i); |
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|
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if($this->orientation == 'h') |
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$y_offset += $direction * $path_info['sz']; |
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else |
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$x_offset += $direction * $path_info['sz']; |
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} |
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if($path == '') |
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return ''; |
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|
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$attr = [ |
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'd' => $path, |
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'stroke' => $this->styles['d_colour'], |
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'fill' => 'none', |
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]; |
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return $this->graph->element('path', $attr); |
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} |
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|
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/** |
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* Returns the list of points with text for $level |
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*/ |
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protected function getPointsForLevel($points, $level) |
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{ |
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// need first point even if it is blank |
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$lpoints = [$points[0]]; |
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$prev = $points[0]->getText($level); |
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|
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$last_point = count($points) - 1; |
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$end = $this->boxed_text ? $last_point : $last_point + 1; |
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for($p = 1; $p < $end; ++$p) { |
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if($points[$p]->blank($level)) |
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continue; |
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|
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$label = $points[$p]->getText($level); |
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if($label == $prev) |
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continue; |
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|
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$lpoints[] = $points[$p]; |
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$prev = $label; |
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} |
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|
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// the last point is the division at the end of the axis |
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if($this->boxed_text) |
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$lpoints[] = $points[$last_point]; |
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return $lpoints; |
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} |
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} |
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|
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|
