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<?php |
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/** |
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* Copyright (C) 2018-2023 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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/** |
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* Converts an abstract axis into SVG markup |
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*/ |
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class DisplayAxis { |
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|
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protected $graph; |
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protected $axis; |
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protected $axis_no; |
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protected $orientation; |
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protected $type; |
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protected $main; |
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protected $styles; |
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protected $show_axis; |
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protected $show_divisions; |
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protected $show_subdivisions; |
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protected $show_text; |
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protected $show_label; |
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protected $label = ''; |
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protected $block_label; |
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protected $boxed_text; |
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protected $minimum_subdivision; |
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protected $minimum_units; |
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protected $subdivisions_fixed; |
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protected $offset = [0, 0]; |
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|
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/** |
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* $orientation = 'h' or 'v' |
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* $type = 'x' or 'y' |
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* $main = TRUE for the main axis |
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* $label_centre = TRUE for graphs with labels between divisions |
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*/ |
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public function __construct(&$graph, &$axis, $axis_no, $orientation, $type, |
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$main, $label_centre) |
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{ |
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$this->axis_no = $axis_no; |
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$this->orientation = $orientation; |
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$this->type = $type; |
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$this->main = $main; |
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$this->block_label = ($type == 'x' && ($label_centre || |
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$graph->getOption('force_block_label_x'))); |
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$this->boxed_text = false; |
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$styles = []; |
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|
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// set up options, styles |
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$o = $orientation; |
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$this->show_axis = false; |
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$this->show_text = false; |
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if($graph->getOption('show_axes')) { |
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$this->show_axis = $graph->getOption(['show_axis_' . $o, $axis_no]); |
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$this->show_text = $graph->getOption('show_axis_text_' . $o); |
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} |
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|
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// offset caused by padding between axis and grid |
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if($o == 'v') { |
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switch($axis_no) { |
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case 0: $this->offset[0] = -$graph->getOption('axis_pad_left'); |
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break; |
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case 1: $this->offset[0] = $graph->getOption('axis_pad_right'); |
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break; |
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} |
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} else { |
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switch($axis_no) { |
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case 0: $this->offset[1] = $graph->getOption('axis_pad_bottom'); |
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break; |
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case 1: $this->offset[1] = -$graph->getOption('axis_pad_top'); |
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break; |
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} |
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} |
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|
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// lambda to make retrieving options simpler |
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$get_axis_option = function($option) use ($graph, $o, $axis_no) { |
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return $graph->getOption([$option . '_' . $o, $axis_no], $option); |
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}; |
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|
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// gridgraph moves label_[xy] into label_[hv] |
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$o_labels = $graph->getOption('label_' . $o); |
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if(is_array($o_labels)) { |
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// use array entry if one exists for this axis |
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if(isset($o_labels[$axis_no])) |
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$this->label = $o_labels[$axis_no]; |
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} elseif($axis_no == 0 && !empty($o_labels)) { |
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// not an array, so only valid for axis 0 |
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$this->label = $o_labels; |
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} |
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$this->show_label = ($this->label != ''); |
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|
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// axis and text both need colour |
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$styles['colour'] = new Colour($graph, $get_axis_option('axis_colour')); |
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if($this->show_axis) { |
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$styles['overlap'] = $graph->getOption('axis_overlap'); |
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$styles['stroke_width'] = $get_axis_option('axis_stroke_width'); |
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if($o == 'v') { |
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$styles['extend'] = [ |
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$graph->getOption('axis_extend_top', 'axis_pad_top'), |
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$graph->getOption('axis_extend_bottom', 'axis_pad_bottom'), |
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]; |
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} else { |
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$styles['extend'] = [ |
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$graph->getOption('axis_extend_left', 'axis_pad_left'), |
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$graph->getOption('axis_extend_right', 'axis_pad_right'), |
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]; |
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} |
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|
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if($graph->getOption('show_divisions')) { |
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$this->show_divisions = true; |
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$styles['d_style'] = $get_axis_option('division_style'); |
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$styles['d_size'] = $get_axis_option('division_size'); |
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$styles['d_colour'] = new Colour($graph, $graph->getOption( |
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['division_colour_' . $o, $axis_no], 'division_colour', |
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['@', $styles['colour']])); |
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|
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if($graph->getOption('show_subdivisions')) { |
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$this->show_subdivisions = true; |
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$styles['s_style'] = $get_axis_option('subdivision_style'); |
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$styles['s_size'] = $get_axis_option('subdivision_size'); |
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$styles['s_colour'] = new Colour($graph, $graph->getOption( |
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['subdivision_colour_' . $o, $axis_no], 'subdivision_colour', |
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['division_colour_' . $o, $axis_no], 'division_colour', |
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['@', $styles['colour']])); |
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$this->minimum_subdivision = $graph->getOption('minimum_subdivision'); |
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$this->minimum_units = ($type == 'x' ? 1 : |
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$graph->getOption(['minimum_units_y', $axis_no])); |
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$this->subdivisions_fixed = $graph->getOption( |
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['subdivision_' . $o, $axis_no]); |
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} |
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} |
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} |
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|
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if($this->show_text) { |
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$styles['t_angle'] = $graph->getOption( |
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['axis_text_angle_' . $o, $axis_no], 0); |
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if($graph->getOption('limit_text_angle')) { |
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$angle = $styles['t_angle'] % 360; |
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if($angle > 180) |
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$angle = -360 + $angle; |
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if($angle < -180) |
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$angle = 360 + $angle; |
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$angle = min(90, max(-90, $angle)); |
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$styles['t_angle'] = $angle; |
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} |
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$styles['t_position'] = $get_axis_option('axis_text_position'); |
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$styles['t_location'] = $get_axis_option('axis_text_location'); |
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$styles['t_font'] = $get_axis_option('axis_font'); |
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$styles['t_font_size'] = Number::units($get_axis_option('axis_font_size')); |
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$styles['t_font_adjust'] = $get_axis_option('axis_font_adjust'); |
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$styles['t_font_weight'] = $get_axis_option('axis_font_weight'); |
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$styles['t_space'] = $get_axis_option('axis_text_space'); |
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$styles['t_offset_x'] = $get_axis_option('axis_text_offset_x'); |
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$styles['t_offset_y'] = $get_axis_option('axis_text_offset_y'); |
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$styles['t_colour'] = new Colour($graph, $graph->getOption( |
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['axis_text_colour_' . $o, $axis_no], 'axis_text_colour', |
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['@', $styles['colour']])); |
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$styles['t_line_spacing'] = Number::units($get_axis_option('axis_text_line_spacing')); |
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if($styles['t_line_spacing'] === null || $styles['t_line_spacing'] < 1) |
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$styles['t_line_spacing'] = $styles['t_font_size']; |
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$styles['t_back_colour'] = null; |
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$styles['t_align'] = $get_axis_option('axis_text_align'); |
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|
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// fill in background colour array, if required |
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$back_colour = $get_axis_option('axis_text_back_colour'); |
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if(!empty($back_colour)) { |
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$styles['t_back_colour'] = [ |
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'stroke-width' => '3px', |
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'stroke' => new Colour($graph, $back_colour), |
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'stroke-linejoin' => 'round', |
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]; |
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} |
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|
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// text is boxed only if it is outside and block labelling |
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if($this->block_label && $this->show_divisions && |
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($styles['d_style'] == 'box' || $styles['d_style'] == 'extend') && |
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$styles['t_position'] != 'inside') { |
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$this->boxed_text = true; |
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|
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// text must be attached to axis, not grid |
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$styles['t_location'] = 'axis'; |
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} |
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} |
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|
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if($this->show_label) { |
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$styles['l_font'] = $graph->getOption( |
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['label_font_' . $o, $axis_no], 'label_font', |
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['axis_font_' . $o, $axis_no], 'axis_font'); |
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$styles['l_font_size'] = Number::units($graph->getOption( |
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['label_font_size_' . $o, $axis_no], 'label_font_size', |
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['axis_font_size_' . $o, $axis_no], 'axis_font_size')); |
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$styles['l_font_weight'] = $graph->getOption( |
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['label_font_weight_' . $o, $axis_no], 'label_font_weight'); |
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$styles['l_colour'] = new Colour($graph, $graph->getOption( |
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['label_colour_' . $o, $axis_no], 'label_colour', |
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['axis_text_colour_' . $o, $axis_no], 'axis_text_colour', |
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['@', $styles['colour']])); |
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$styles['l_space'] = $graph->getOption('label_space'); |
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$styles['l_pos'] = $get_axis_option('axis_label_position'); |
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$styles['l_line_spacing'] = Number::units($get_axis_option('label_line_spacing')); |
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if($styles['l_line_spacing'] === null || $styles['l_line_spacing'] < 1) |
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$styles['l_line_spacing'] = $styles['l_font_size']; |
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} |
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|
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$this->styles = $styles; |
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$this->axis =& $axis; |
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$this->graph =& $graph; |
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} |
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|
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/** |
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* Returns the array of style information for the axis |
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*/ |
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public function getStyling() |
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{ |
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return $this->styles; |
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} |
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|
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/** |
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* Returns the extents of the axis, relative to where it will be drawn from |
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* returns BoundingBox |
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*/ |
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public function measure($with_label = true) |
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{ |
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$bbox = new BoundingBox(0, 0, 0, 0); |
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if($this->show_axis) { |
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$dbox = $this->getDivisionsBBox(0); |
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if($this->orientation == 'h') |
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$dbox->flipY(); |
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$bbox->growBox($dbox); |
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} |
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|
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if($this->show_text) { |
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$tbox = $this->getTextBBox(0); |
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$bbox->growBox($tbox); |
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} |
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|
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if($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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* Adds the padding offset to the bounding box |
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*/ |
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protected function addOffset(BoundingBox $bbox) |
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{ |
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if($this->axis_no > 0) { |
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$bbox->x2 += $this->offset[0]; |
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$bbox->y1 += $this->offset[1]; |
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} else { |
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$bbox->x1 += $this->offset[0]; |
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$bbox->y2 += $this->offset[1]; |
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} |
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return $bbox; |
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} |
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|
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/** |
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* Measures the space taken up by axis and divisions |
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* returns BoundingBox |
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*/ |
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protected function getDivisionsBBox($level) |
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{ |
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$bbox = new BoundingBox(0, 0, 0, 0); |
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if(!$this->show_axis) |
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return $bbox; |
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|
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// orientation more important than type |
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$x = 'x'; |
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$y = 'y'; |
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if($this->orientation == 'h') { |
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$x = 'y'; |
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$y = 'x'; |
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} |
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$min = $max = ['x' => 0, 'y' => 0]; |
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|
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$length = $this->axis->getLength(); |
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$d_info = $s_info = ['pos' => 0, 'sz' => 0]; |
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if($this->show_divisions) { |
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$di = $this->getDivisionPathInfo(false, 100, 100, $level); |
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if($di !== null) |
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$d_info = $di; |
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if($this->show_subdivisions) { |
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$si = $this->getDivisionPathInfo(true, 100, 100, $level); |
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if($si !== null) |
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$s_info = $si; |
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} |
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} |
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|
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$points = $this->axis->getGridPoints(0); |
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$p1 = end($points); |
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if($p1->position < 0) { |
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$min[$y] = $p1->position; |
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$max[$y] = 0; |
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} else { |
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$min[$y] = 0; |
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$max[$y] = $p1->position; |
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} |
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|
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$min[$x] = min($d_info['pos'], $s_info['pos']); |
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$max[$x] = max($d_info['pos'] + $d_info['sz'], $s_info['pos'] + $s_info['sz']); |
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|
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$bbox->grow($min['x'], $min['y'], $max['x'], $max['y']); |
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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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$bbox = new BoundingBox(0, 0, 0, 0); |
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list($x_off, $y_off, $opp) = $this->getTextOffset(0, 0, 0, 0, 0, 0, $level); |
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|
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$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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|
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$length = $this->axis->getLength(); |
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$points = $this->axis->getGridPoints(0); |
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$positions = $this->getTextPositions(0, 0, $x_off, $y_off, $points, null); |
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$count = count($positions); |
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for($p = 0; $p < $count; ++$p) { |
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|
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if(!$this->pointTextVisible($points[$p], $length, $t_offset)) |
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continue; |
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|
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$pos = $positions[$p]; |
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$lbl = $this->measureText($pos['x'], $pos['y'], $points[$p], $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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return $bbox; |
| 356 |
} |
| 357 |
|
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/** |
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* Returns the overlap between axis text labels |
| 360 |
*/ |
| 361 |
public function getTextOverlap() |
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{ |
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// start with obviously good overlap |
| 364 |
$overlap = -1000; |
| 365 |
$prev_x = -10; |
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$level = 0; |
| 367 |
|
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// no overlap if there is no text |
| 369 |
if(!$this->show_text) |
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return null; |
| 371 |
|
| 372 |
list($x_off, $y_off, $opp) = $this->getTextOffset(0, 0, 0, 0, 0, 0, $level); |
| 373 |
$t_offset = ($this->orientation == 'h' ? $x_off : $y_off); |
| 374 |
if($this->axis->reversed()) |
| 375 |
$t_offset = -$t_offset; |
| 376 |
|
| 377 |
$length = $this->axis->getLength(); |
| 378 |
$points = $this->axis->getGridPoints(0); |
| 379 |
$positions = $this->getTextPositions(0, 0, $x_off, $y_off, $points, null); |
| 380 |
$count = count($positions); |
| 381 |
|
| 382 |
for($p = 0; $p < $count; ++$p) { |
| 383 |
if(!$this->pointTextVisible($points[$p], $length, $t_offset)) |
| 384 |
continue; |
| 385 |
|
| 386 |
$pos = $positions[$p]; |
| 387 |
$lbl = $this->measureText($pos['x'], $pos['y'], $points[$p], $opp, $level); |
| 388 |
$o = $prev_x - $lbl['x']; |
| 389 |
|
| 390 |
// bail out now if the overlap is positive |
| 391 |
if($o > 0) |
| 392 |
return $o; |
| 393 |
if($o > $overlap) |
| 394 |
$overlap = $o; |
| 395 |
$prev_x = $lbl['x'] + $lbl['width']; |
| 396 |
} |
| 397 |
return $overlap; |
| 398 |
} |
| 399 |
|
| 400 |
/** |
| 401 |
* Returns true if the text exists and its location is within the axis |
| 402 |
*/ |
| 403 |
protected function pointTextVisible($point, $axis_len, $offset) |
| 404 |
{ |
| 405 |
if($point->blank()) |
| 406 |
return false; |
| 407 |
|
| 408 |
// amount of space to allow for rounding errors |
| 409 |
$leeway = 0.5; |
| 410 |
$position = abs($point->position) + $offset; |
| 411 |
return $position >= -$leeway && $position <= $axis_len + $leeway; |
| 412 |
} |
| 413 |
|
| 414 |
/** |
| 415 |
* Returns the positions (actually offsets) of all the text blocks |
| 416 |
*/ |
| 417 |
protected function getTextPositions($x, $y, $xoff, $yoff, $points, $anchor) |
| 418 |
{ |
| 419 |
$positions = []; |
| 420 |
// vertical axis a bit simpler |
| 421 |
if($this->orientation == 'v') { |
| 422 |
foreach($points as $k => $p) { |
| 423 |
if($this->boxed_text && isset($points[$k + 1])) { |
| 424 |
$pnext = $points[$k + 1]; |
| 425 |
$yoff = ($pnext->position - $p->position) / 2; |
| 426 |
} |
| 427 |
$positions[] = ['x' => $x + $xoff + $this->styles['t_offset_x'], 'y' => $y + $yoff + $this->styles['t_offset_y']]; |
| 428 |
} |
| 429 |
return $positions; |
| 430 |
} |
| 431 |
|
| 432 |
foreach($points as $k => $p) { |
| 433 |
if($anchor == 'start') { |
| 434 |
$xoff = $this->styles['t_space']; |
| 435 |
} elseif($anchor == 'end') { |
| 436 |
$pnext = $points[$k + 1]; |
| 437 |
$xoff = $pnext->position - $p->position - $this->styles['t_space']; |
| 438 |
} elseif($this->boxed_text && isset($points[$k + 1])) { |
| 439 |
$pnext = $points[$k + 1]; |
| 440 |
$xoff = ($pnext->position - $p->position) / 2; |
| 441 |
} |
| 442 |
$positions[] = ['x' => $x + $xoff + $this->styles['t_offset_x'], 'y' => $y + $yoff + $this->styles['t_offset_y']]; |
| 443 |
} |
| 444 |
return $positions; |
| 445 |
} |
| 446 |
|
| 447 |
/** |
| 448 |
* Draws the axis at ($x,$y) |
| 449 |
* $gx, $gy, $g_width and $g_height are the grid dimensions |
| 450 |
*/ |
| 451 |
public function draw($x, $y, $gx, $gy, $g_width, $g_height) |
| 452 |
{ |
| 453 |
$content = ''; |
| 454 |
$x += $this->offset[0]; |
| 455 |
$y += $this->offset[1]; |
| 456 |
$gx += $this->offset[0]; |
| 457 |
$gy += $this->offset[1]; |
| 458 |
if($this->show_axis) { |
| 459 |
if($this->show_divisions) { |
| 460 |
$content .= $this->drawDivisions($x, $y, $g_width, $g_height); |
| 461 |
if($this->show_subdivisions) { |
| 462 |
$content .= $this->drawSubDivisions($x, $y, $g_width, $g_height); |
| 463 |
} |
| 464 |
} |
| 465 |
|
| 466 |
$length = $this->axis->getLength(); |
| 467 |
$content .= $this->drawAxisLine($x, $y, $length); |
| 468 |
} |
| 469 |
|
| 470 |
if($this->show_text || $this->show_label) |
| 471 |
$content .= $this->drawText($x, $y, $gx, $gy, $g_width, $g_height); |
| 472 |
|
| 473 |
return $content; |
| 474 |
} |
| 475 |
|
| 476 |
/** |
| 477 |
* Draws the axis line |
| 478 |
*/ |
| 479 |
public function drawAxisLine($x, $y, $len) |
| 480 |
{ |
| 481 |
$overlap = $this->styles['overlap']; |
| 482 |
$length = $len + $overlap * 2; |
| 483 |
$line = $this->orientation; // 'h' and 'v' are SVG path lines |
| 484 |
$reversed = $this->axis->reversed(); |
| 485 |
if($this->orientation == 'h') { |
| 486 |
$x = $reversed ? $x - $overlap - $len : $x - $overlap; |
| 487 |
$x -= $this->styles['extend'][0]; |
| 488 |
$length += $this->styles['extend'][0] + $this->styles['extend'][1]; |
| 489 |
} else { |
| 490 |
$y = $reversed ? $y - $overlap - $len : $y - $overlap; |
| 491 |
$y -= $this->styles['extend'][0]; |
| 492 |
$length += $this->styles['extend'][0] + $this->styles['extend'][1]; |
| 493 |
} |
| 494 |
|
| 495 |
$colour = $this->styles['colour']; |
| 496 |
if($colour->isGradient()) { |
| 497 |
// gradients don't work on stroked horizontal or vertical lines |
| 498 |
$sw = $this->styles['stroke_width']; |
| 499 |
$attr = [ |
| 500 |
'fill' => $colour, |
| 501 |
'x' => $x, |
| 502 |
'y' => $y, |
| 503 |
]; |
| 504 |
if($this->orientation == 'h') { |
| 505 |
$attr['y'] -= $sw / 2; |
| 506 |
$attr['width'] = $length; |
| 507 |
$attr['height'] = $sw; |
| 508 |
} else { |
| 509 |
$attr['x'] -= $sw / 2; |
| 510 |
$attr['width'] = $sw; |
| 511 |
$attr['height'] = $length; |
| 512 |
} |
| 513 |
return $this->graph->element('rect', $attr); |
| 514 |
} |
| 515 |
|
| 516 |
$attr = [ |
| 517 |
'stroke' => $colour, |
| 518 |
'd' => new PathData('M', $x, $y, $line, $length), |
| 519 |
]; |
| 520 |
|
| 521 |
if($this->styles['stroke_width'] != 1) |
| 522 |
$attr['stroke-width'] = $this->styles['stroke_width']; |
| 523 |
return $this->graph->element('path', $attr); |
| 524 |
} |
| 525 |
|
| 526 |
/** |
| 527 |
* Draws the axis divisions |
| 528 |
*/ |
| 529 |
public function drawDivisions($x, $y, $g_width, $g_height) |
| 530 |
{ |
| 531 |
$path_info = $this->getDivisionPathInfo(false, $g_width, $g_height, 0); |
| 532 |
if($path_info === null) |
| 533 |
return ''; |
| 534 |
|
| 535 |
$points = $this->axis->getGridPoints(0); |
| 536 |
$d = $this->getDivisionPath($x, $y, $points, $path_info, 0); |
| 537 |
|
| 538 |
$attr = [ |
| 539 |
'd' => $d, |
| 540 |
'stroke' => $this->styles['d_colour'], |
| 541 |
'fill' => 'none', |
| 542 |
]; |
| 543 |
return $this->graph->element('path', $attr); |
| 544 |
} |
| 545 |
|
| 546 |
/** |
| 547 |
* Draws the axis subdivisions |
| 548 |
*/ |
| 549 |
public function drawSubDivisions($x, $y, $g_width, $g_height) |
| 550 |
{ |
| 551 |
$path_info = $this->getDivisionPathInfo(true, $g_width, $g_height, 0); |
| 552 |
if($path_info === null) |
| 553 |
return ''; |
| 554 |
|
| 555 |
$points = $this->axis->getGridSubdivisions($this->minimum_subdivision, |
| 556 |
$this->minimum_units, 0, $this->subdivisions_fixed); |
| 557 |
$d = $this->getDivisionPath($x, $y, $points, $path_info, 0); |
| 558 |
$attr = [ |
| 559 |
'd' => $d, |
| 560 |
'stroke' => $this->styles['s_colour'], |
| 561 |
'fill' => 'none', |
| 562 |
]; |
| 563 |
return $this->graph->element('path', $attr); |
| 564 |
} |
| 565 |
|
| 566 |
/** |
| 567 |
* Draws the axis text labels |
| 568 |
*/ |
| 569 |
public function drawText($x, $y, $gx, $gy, $g_width, $g_height) |
| 570 |
{ |
| 571 |
$labels = ''; |
| 572 |
if($this->show_text) { |
| 573 |
list($x_offset, $y_offset, $opposite) = $this->getTextOffset($x, $y, |
| 574 |
$gx, $gy, $g_width, $g_height, 0); |
| 575 |
|
| 576 |
$t_offset = ($this->orientation == 'h' ? $x_offset : $y_offset); |
| 577 |
if($this->axis->reversed()) |
| 578 |
$t_offset = -$t_offset; |
| 579 |
|
| 580 |
$length = $this->axis->getLength(); |
| 581 |
$points = $this->axis->getGridPoints(0); |
| 582 |
$anchor = null; |
| 583 |
$space = $this->styles['t_space']; |
| 584 |
if($this->styles['t_align']) { |
| 585 |
$bbox = $this->measure(false); |
| 586 |
switch($this->styles['t_align']) { |
| 587 |
case 'left': |
| 588 |
if($this->orientation == 'v') { |
| 589 |
if(!$opposite) { |
| 590 |
$anchor = 'start'; |
| 591 |
$x_offset = $bbox->x1 + $space; |
| 592 |
$x_offset -= $this->offset[0]; |
| 593 |
} |
| 594 |
} else { |
| 595 |
$anchor = 'start'; |
| 596 |
$x_offset = $space; |
| 597 |
} |
| 598 |
break; |
| 599 |
case 'right': |
| 600 |
if($this->orientation == 'v') { |
| 601 |
if($opposite) { |
| 602 |
$anchor = 'end'; |
| 603 |
$x_offset = $bbox->x2 - $space; |
| 604 |
} |
| 605 |
} else { |
| 606 |
$anchor = 'end'; |
| 607 |
$x_offset = -$space; |
| 608 |
} |
| 609 |
break; |
| 610 |
case 'centre': |
| 611 |
if($this->orientation == 'v') { |
| 612 |
$x_offset = ($x_offset + ($opposite ? $bbox->x2 : $bbox->x1)) / 2; |
| 613 |
$anchor = 'middle'; |
| 614 |
} |
| 615 |
} |
| 616 |
} |
| 617 |
|
| 618 |
$positions = $this->getTextPositions($x, $y, $x_offset, $y_offset, $points, $anchor); |
| 619 |
$count = count($positions); |
| 620 |
for($p = 0; $p < $count; ++$p) { |
| 621 |
|
| 622 |
if(!$this->pointTextVisible($points[$p], $length, $t_offset)) |
| 623 |
continue; |
| 624 |
|
| 625 |
$pos = $positions[$p]; |
| 626 |
$labels .= $this->getText($pos['x'], $pos['y'], $points[$p], $opposite, 0, $anchor); |
| 627 |
} |
| 628 |
if($labels != '') { |
| 629 |
$group = [ |
| 630 |
'font-family' => $this->styles['t_font'], |
| 631 |
'font-size' => $this->styles['t_font_size'], |
| 632 |
'fill' => $this->styles['t_colour'], |
| 633 |
]; |
| 634 |
$weight = $this->styles['t_font_weight']; |
| 635 |
if($weight != 'normal' && $weight !== null) |
| 636 |
$group['font-weight'] = $weight; |
| 637 |
|
| 638 |
$labels = $this->graph->element('g', $group, null, $labels); |
| 639 |
} |
| 640 |
} |
| 641 |
if($this->show_label) |
| 642 |
$labels .= $this->getLabel($x, $y, $gx, $gy, $g_width, $g_height); |
| 643 |
|
| 644 |
return $labels; |
| 645 |
} |
| 646 |
|
| 647 |
/** |
| 648 |
* Returns the label |
| 649 |
*/ |
| 650 |
protected function getLabel($x, $y, $gx, $gy, $g_width, $g_height) |
| 651 |
{ |
| 652 |
$pos = $this->getLabelPosition(); |
| 653 |
$offset = $this->getLabelOffset($x, $y, $gx, $gy, $g_width, $g_height); |
| 654 |
$tx = $offset['x'] + $pos['tx']; |
| 655 |
$ty = $offset['y'] + $pos['ty']; |
| 656 |
$label = [ |
| 657 |
'text-anchor' => 'middle', |
| 658 |
'font-family' => $this->styles['l_font'], |
| 659 |
'font-size' => $this->styles['l_font_size'], |
| 660 |
'fill' => $this->styles['l_colour'], |
| 661 |
'x' => $tx, |
| 662 |
'y' => $ty, |
| 663 |
]; |
| 664 |
if(!empty($this->styles['l_font_weight']) && |
| 665 |
$this->styles['l_font_weight'] != 'normal') |
| 666 |
$label['font-weight'] = $this->styles['l_font_weight']; |
| 667 |
if($pos['angle']) { |
| 668 |
$xform = new Transform; |
| 669 |
$xform->rotate($pos['angle'], $tx, $ty); |
| 670 |
$label['transform'] = $xform; |
| 671 |
} |
| 672 |
|
| 673 |
$svg_text = new Text($this->graph, $this->styles['l_font']); |
| 674 |
return $svg_text->text($this->label, $this->styles['l_line_spacing'], $label); |
| 675 |
} |
| 676 |
|
| 677 |
/** |
| 678 |
* Returns the corrected offset for the label |
| 679 |
*/ |
| 680 |
protected function getLabelOffset($x, $y, $gx, $gy, $g_width, $g_height) |
| 681 |
{ |
| 682 |
if($this->orientation == 'h') { |
| 683 |
|
| 684 |
// label at bottom of grid? |
| 685 |
if($this->axis_no == 0) |
| 686 |
$y = $gy + $g_height; |
| 687 |
|
| 688 |
} else { |
| 689 |
|
| 690 |
// leftmost axis label must be outside grid |
| 691 |
if($this->axis_no == 0) |
| 692 |
$x = $gx; |
| 693 |
} |
| 694 |
return ['x' => $x, 'y' => $y]; |
| 695 |
} |
| 696 |
|
| 697 |
/** |
| 698 |
* Returns the dimensions of the label |
| 699 |
* x, y, width, height = position and size |
| 700 |
* tx, tx = text anchor point |
| 701 |
* angle = text angle |
| 702 |
*/ |
| 703 |
protected function getLabelPosition() |
| 704 |
{ |
| 705 |
$bbox = $this->measure(false); |
| 706 |
$font_size = $this->styles['l_font_size']; |
| 707 |
$line_spacing = $this->styles['l_line_spacing']; |
| 708 |
$svg_text = new Text($this->graph, $this->styles['l_font']); |
| 709 |
$tsize = $svg_text->measure($this->label, $font_size, 0, $line_spacing); |
| 710 |
$baseline = $svg_text->baseline($font_size); |
| 711 |
$a_length = $this->axis->getLength(); |
| 712 |
$space = $this->styles['l_space']; |
| 713 |
$align = $this->styles['l_pos']; |
| 714 |
|
| 715 |
if($this->orientation == 'h') { |
| 716 |
$width = $tsize[0]; |
| 717 |
$height = $tsize[1]; |
| 718 |
if($this->axis_no > 0) { |
| 719 |
$y = $bbox->y1 - $space - $height; |
| 720 |
} else { |
| 721 |
$y = $bbox->y2 + $space; |
| 722 |
} |
| 723 |
$y -= $this->offset[1]; // handle padding offset |
| 724 |
if(is_numeric($align)) { |
| 725 |
$tx = $a_length * $align; |
| 726 |
} else { |
| 727 |
switch($align) { |
| 728 |
case 'left' : |
| 729 |
$tx = $width / 2; |
| 730 |
break; |
| 731 |
case 'right': |
| 732 |
$tx = $a_length - ($width / 2); |
| 733 |
break; |
| 734 |
default: |
| 735 |
$tx = $a_length / 2; |
| 736 |
break; |
| 737 |
} |
| 738 |
} |
| 739 |
$ty = $y + $baseline; |
| 740 |
$x = $tx - $width / 2; |
| 741 |
|
| 742 |
$height += $space; |
| 743 |
$angle = 0; |
| 744 |
} else { |
| 745 |
$width = $tsize[1]; |
| 746 |
$height = $tsize[0]; |
| 747 |
$reversed = $this->axis->reversed(); |
| 748 |
if($this->axis_no > 0) { |
| 749 |
$x = $bbox->x2 + $space; |
| 750 |
$x -= $this->offset[0]; // handle padding offset |
| 751 |
$tx = $x + $width - $baseline; |
| 752 |
} else { |
| 753 |
$x = $bbox->x1 - $space - $width; |
| 754 |
$x -= $this->offset[0]; // handle padding offset |
| 755 |
$tx = $x + $baseline; |
| 756 |
$x -= $space; |
| 757 |
} |
| 758 |
if(is_numeric($align)) { |
| 759 |
$ty = $reversed ? -$a_length * $align : $a_length * $align; |
| 760 |
} else { |
| 761 |
switch($align) { |
| 762 |
case 'top' : |
| 763 |
$ty = $reversed ? -$a_length + $height / 2 : $height / 2; |
| 764 |
break; |
| 765 |
case 'bottom': |
| 766 |
$ty = $reversed ? -$height / 2 : $a_length - $height / 2; |
| 767 |
break; |
| 768 |
default: |
| 769 |
$ty = $reversed ? -$a_length / 2 : $a_length / 2; |
| 770 |
break; |
| 771 |
} |
| 772 |
} |
| 773 |
$y = $ty - $height / 2; |
| 774 |
$width += $space; |
| 775 |
$angle = $this->axis_no > 0 ? 90 : 270; |
| 776 |
} |
| 777 |
|
| 778 |
return compact('x', 'y', 'width', 'height', 'tx', 'ty', 'angle'); |
| 779 |
} |
| 780 |
|
| 781 |
/** |
| 782 |
* Returns the distance from the axis to draw the text |
| 783 |
*/ |
| 784 |
protected function getTextOffset($ax, $ay, $gx, $gy, $g_width, $g_height, |
| 785 |
$level) |
| 786 |
{ |
| 787 |
$d1 = $d2 = 0; |
| 788 |
if($this->show_divisions && $level == 0) { |
| 789 |
if(!$this->boxed_text) { |
| 790 |
$d_info = $this->getDivisionPathInfo(false, 100, 100, 0); |
| 791 |
if($d_info !== null) { |
| 792 |
$d1 = $d_info['pos']; |
| 793 |
$d2 = $d1 + $d_info['sz']; |
| 794 |
} |
| 795 |
} |
| 796 |
if($this->show_subdivisions) { |
| 797 |
$s_info = $this->getDivisionPathInfo(true, 100, 100, 0); |
| 798 |
if($s_info !== null) { |
| 799 |
$s1 = $s_info['pos']; |
| 800 |
$s2 = $s1 + $s_info['sz']; |
| 801 |
$d1 = min($d1, $s1); |
| 802 |
$d2 = max($d2, $s2); |
| 803 |
} |
| 804 |
} |
| 805 |
} |
| 806 |
$space = $this->styles['t_space']; |
| 807 |
$d1 -= $space; |
| 808 |
$d2 += $space; |
| 809 |
$opposite = ($this->styles['t_position'] == 'inside'); |
| 810 |
$reversed = $this->axis->reversed(); |
| 811 |
$block_offset = $this->axis->unit() * ($reversed ? -0.5 : 0.5); |
| 812 |
$grid = ($this->styles['t_location'] == 'grid'); |
| 813 |
if($this->axis_no > 0) |
| 814 |
$opposite = !$opposite; |
| 815 |
if($this->orientation == 'h') { |
| 816 |
$y = ($opposite ? -$d2 : -$d1); |
| 817 |
$x = ($this->block_label ? $block_offset : 0); |
| 818 |
if($grid) { |
| 819 |
$y += $gy + $g_height - $ay; |
| 820 |
if($this->axis_no == 1) |
| 821 |
$y -= $g_height; |
| 822 |
} |
| 823 |
} else { |
| 824 |
$x = ($opposite ? $d2 : $d1); |
| 825 |
$y = ($this->block_label ? $block_offset : 0); |
| 826 |
if($grid && $this->axis_no < 2) { |
| 827 |
$x += $gx - $ax; |
| 828 |
if($this->axis_no == 1) |
| 829 |
$x += $g_width; |
| 830 |
} |
| 831 |
} |
| 832 |
return [$x, $y, $opposite]; |
| 833 |
} |
| 834 |
|
| 835 |
/** |
| 836 |
* Returns the bounding box for a single axis label |
| 837 |
*/ |
| 838 |
protected function measureText($x, $y, &$point, $opposite, $level) |
| 839 |
{ |
| 840 |
list($svg_text, $font_size, $attr, $anchor, $rcx, $rcy, $angle, |
| 841 |
$line_spacing) = $this->getTextInfo($x, $y, $point, $opposite, $level); |
| 842 |
|
| 843 |
// find (rotated) size and position now |
| 844 |
list($x, $y, $w, $h) = $svg_text->measurePosition($point->getText($level), |
| 845 |
$font_size, $line_spacing, $attr['x'], $attr['y'], $anchor, $angle, |
| 846 |
$rcx, $rcy); |
| 847 |
|
| 848 |
// per-item text indent last |
| 849 |
if($point->item && $point->axis_text_indent) { |
| 850 |
if($opposite) |
| 851 |
$w += $point->axis_text_indent; |
| 852 |
else |
| 853 |
$x -= $point->axis_text_indent; |
| 854 |
} |
| 855 |
return ['x' => $x, 'y' => $y, 'width' => $w, 'height' => $h]; |
| 856 |
} |
| 857 |
|
| 858 |
/** |
| 859 |
* Returns the SVG fragment for a single axis label |
| 860 |
*/ |
| 861 |
protected function getText($x, $y, &$point, $opposite, $level, $anchor) |
| 862 |
{ |
| 863 |
// skip 0 on axis when it would sit on top of other axis |
| 864 |
if(!$this->block_label && $point->value == 0) { |
| 865 |
if($this->axis_no == 0 && $opposite) |
| 866 |
return ''; |
| 867 |
if($this->axis_no == 1 && !$opposite) |
| 868 |
return ''; |
| 869 |
} |
| 870 |
|
| 871 |
// see if the text needs shifting |
| 872 |
if($point->item && $point->axis_text_indent) { |
| 873 |
switch($this->styles['t_align']) { |
| 874 |
case 'left' : |
| 875 |
$x += $point->axis_text_indent; |
| 876 |
break; |
| 877 |
case 'centre': |
| 878 |
// centred things can't be indented |
| 879 |
break; |
| 880 |
case 'right': |
| 881 |
default: |
| 882 |
$x -= $point->axis_text_indent; |
| 883 |
break; |
| 884 |
} |
| 885 |
} |
| 886 |
|
| 887 |
$string = $point->getText($level); |
| 888 |
$text_out = ''; |
| 889 |
$text_info = $this->getTextInfo($x, $y, $point, $opposite, $level); |
| 890 |
$svg_text = $text_info[0]; |
| 891 |
$attr = $text_info[2]; |
| 892 |
$line_spacing = $text_info[7]; |
| 893 |
$back_colour = $this->styles['t_back_colour']; |
| 894 |
|
| 895 |
// $anchor overrides the one based on axis text location |
| 896 |
if($anchor) |
| 897 |
$attr['text-anchor'] = $anchor; |
| 898 |
|
| 899 |
// structured data attributes? |
| 900 |
if($point->item) { |
| 901 |
if($point->axis_text_font) |
| 902 |
$attr['font-family'] = $point->axis_text_font; |
| 903 |
if($point->axis_text_font_size) |
| 904 |
$attr['font-size'] = $point->axis_text_font_size; |
| 905 |
if($point->axis_text_font_weight) |
| 906 |
$attr['font-weight'] = $point->axis_text_font_weight; |
| 907 |
if($point->axis_text_colour) |
| 908 |
$attr['fill'] = new Colour($this->graph, $point->axis_text_colour); |
| 909 |
if($point->axis_text_back_colour) |
| 910 |
$back_colour = [ |
| 911 |
'stroke-width' => '3px', |
| 912 |
'stroke' => new Colour($this->graph, $point->axis_text_back_colour), |
| 913 |
'stroke-linejoin' => 'round', |
| 914 |
]; |
| 915 |
} |
| 916 |
|
| 917 |
if(!empty($back_colour)) { |
| 918 |
$b_attr = array_merge($back_colour, $attr); |
| 919 |
$text_out .= $svg_text->text($string, $line_spacing, $b_attr); |
| 920 |
} |
| 921 |
$text_out .= $svg_text->text($string, $line_spacing, $attr); |
| 922 |
return $text_out; |
| 923 |
} |
| 924 |
|
| 925 |
/** |
| 926 |
* Returns text information: |
| 927 |
* [Text, $font_size, $attr, $anchor, $rcx, $rcy, $angle, $line_spacing] |
| 928 |
*/ |
| 929 |
protected function getTextInfo($x, $y, &$point, $opposite, $level) |
| 930 |
{ |
| 931 |
$font = $this->styles['t_font']; |
| 932 |
$font_size = $this->styles['t_font_size']; |
| 933 |
$font_adjust = $this->styles['t_font_adjust']; |
| 934 |
if($point->item) { |
| 935 |
if($point->axis_text_font) |
| 936 |
$font = $point->axis_text_font; |
| 937 |
if($point->axis_text_font_size) |
| 938 |
$font_size = $point->axis_text_font_size; |
| 939 |
if($point->axis_text_font_adjust) |
| 940 |
$font_adjust = $point->axis_text_font_adjust; |
| 941 |
} |
| 942 |
$line_spacing = $this->styles['t_line_spacing']; |
| 943 |
$svg_text = new Text($this->graph, $font, $font_adjust); |
| 944 |
$baseline = $svg_text->baseline($font_size); |
| 945 |
list($w, $h) = $svg_text->measure($point->getText($level), $font_size, 0, |
| 946 |
$line_spacing); |
| 947 |
if($this->orientation == 'h') { |
| 948 |
$attr['x'] = $x + $point->position; |
| 949 |
$attr['y'] = $y + $baseline - ($opposite ? $h : 0); |
| 950 |
$anchor = 'middle'; |
| 951 |
} else { |
| 952 |
$attr['x'] = $x; |
| 953 |
$attr['y'] = $y + $baseline + $point->position - $h / 2; |
| 954 |
$anchor = $opposite ? 'start' : 'end'; |
| 955 |
} |
| 956 |
|
| 957 |
$angle = $this->styles['t_angle']; |
| 958 |
$rcx = $rcy = null; |
| 959 |
if($angle) { |
| 960 |
if($this->orientation == 'h') { |
| 961 |
$rcx = $x + $point->position; |
| 962 |
$rcy = $y + $h * ($opposite ? -0.5 : 0.5); |
| 963 |
if($angle < 0) { |
| 964 |
$anchor = 'end'; |
| 965 |
$attr['x'] += $h * 0.5; |
| 966 |
} else { |
| 967 |
$anchor = 'start'; |
| 968 |
$attr['x'] -= $h * 0.5; |
| 969 |
} |
| 970 |
if($opposite) |
| 971 |
$angle = -$angle; |
| 972 |
} else { |
| 973 |
$rcx = $attr['x'] + $h * ($opposite ? 0.5 : -0.5); |
| 974 |
$rcy = $y + $point->position; |
| 975 |
} |
| 976 |
$xform = new Transform; |
| 977 |
$xform->rotate($angle, $rcx, $rcy); |
| 978 |
$attr['transform'] = $xform; |
| 979 |
} |
| 980 |
$attr['text-anchor'] = $anchor; |
| 981 |
|
| 982 |
return [$svg_text, $font_size, $attr, $anchor, $rcx, $rcy, $angle, |
| 983 |
$line_spacing]; |
| 984 |
} |
| 985 |
|
| 986 |
/** |
| 987 |
* Returns the path for divisions or subdivisions |
| 988 |
*/ |
| 989 |
protected function getDivisionPath($x, $y, $points, $path_info, $level) |
| 990 |
{ |
| 991 |
$y0 = $y; |
| 992 |
$x0 = $x; |
| 993 |
$yinc = $xinc = 0; |
| 994 |
if($this->orientation == 'v') |
| 995 |
{ |
| 996 |
$x0 = $x + $path_info['pos']; |
| 997 |
$len = $path_info['sz']; |
| 998 |
$yinc = 1; |
| 999 |
} |
| 1000 |
else |
| 1001 |
{ |
| 1002 |
$y0 = $y - $path_info['pos']; |
| 1003 |
$len = -$path_info['sz']; |
| 1004 |
$xinc = 1; |
| 1005 |
} |
| 1006 |
|
| 1007 |
$line = $path_info['line']; |
| 1008 |
$path = new PathData; |
| 1009 |
foreach($points as $point) { |
| 1010 |
$x = $x0 + $point->position * $xinc; |
| 1011 |
$y = $y0 + $point->position * $yinc; |
| 1012 |
$path->add('M', $x, $y, $line, $len); |
| 1013 |
} |
| 1014 |
|
| 1015 |
if(!$path->isEmpty() && $path_info['box']) { |
| 1016 |
$x = $x0 + $path_info['box_pos'] * $yinc; |
| 1017 |
$y = $y0 + $path_info['box_pos'] * $xinc; |
| 1018 |
$path->add('M', $x, $y, $path_info['box_line'], $path_info['box_len']); |
| 1019 |
} |
| 1020 |
return $path; |
| 1021 |
} |
| 1022 |
|
| 1023 |
/** |
| 1024 |
* Returns the details of the path segment |
| 1025 |
*/ |
| 1026 |
protected function getDivisionPathInfo($subdiv, $g_width, $g_height, $level) |
| 1027 |
{ |
| 1028 |
if($this->orientation == 'h') { |
| 1029 |
$line = 'v'; |
| 1030 |
$full = $g_height; |
| 1031 |
$box_len = $g_width; |
| 1032 |
$box_line = 'h'; |
| 1033 |
} else { |
| 1034 |
$line = 'h'; |
| 1035 |
$full = $g_width; |
| 1036 |
$box_len = $this->axis->reversed() ? -$g_height : $g_height; |
| 1037 |
$box_line = 'v'; |
| 1038 |
} |
| 1039 |
|
| 1040 |
if($subdiv) { |
| 1041 |
$style = $this->styles['s_style']; |
| 1042 |
$sz = $size = $this->styles['s_size']; |
| 1043 |
} else { |
| 1044 |
$style = $this->styles['d_style']; |
| 1045 |
$sz = $size = $this->styles['d_size']; |
| 1046 |
if($this->boxed_text) { |
| 1047 |
$bbox = $this->getTextBBox($level); |
| 1048 |
$sx = $bbox->width(); |
| 1049 |
$sy = $bbox->height(); |
| 1050 |
$sz = $size = ($this->orientation == 'h' ? $sy : $sx) + |
| 1051 |
$this->styles['t_space']; |
| 1052 |
} |
| 1053 |
} |
| 1054 |
if(!$this->main) |
| 1055 |
$style = str_replace('full', '', $style); |
| 1056 |
$pos = 0; |
| 1057 |
$box_pos = 0; |
| 1058 |
$box = false; |
| 1059 |
|
| 1060 |
switch($style) { |
| 1061 |
case 'none' : |
| 1062 |
return null; // no pos or sz |
| 1063 |
case 'infull' : |
| 1064 |
$sz = $full; |
| 1065 |
break; |
| 1066 |
case 'over' : |
| 1067 |
$pos = -$size; |
| 1068 |
$sz = $size * 2; |
| 1069 |
break; |
| 1070 |
case 'overfull' : |
| 1071 |
if($this->axis_no == 0) |
| 1072 |
$pos = -$size; |
| 1073 |
$sz = $full + $size; |
| 1074 |
break; |
| 1075 |
case 'in' : |
| 1076 |
if($this->axis_no != 0) |
| 1077 |
$pos = -$size; |
| 1078 |
break; |
| 1079 |
case 'box' : |
| 1080 |
$box = true; |
| 1081 |
if($this->axis_no > 0) |
| 1082 |
$box_pos += ($this->orientation == 'h' ? -$size : $size); |
| 1083 |
if($this->axis_no == 0) |
| 1084 |
$pos -= $size; |
| 1085 |
break; |
| 1086 |
case 'extend' : |
| 1087 |
if($this->axis_no > 0) |
| 1088 |
$box_pos += ($this->orientation == 'h' ? -$size : $size); |
| 1089 |
// fall through |
| 1090 |
case 'out' : |
| 1091 |
default : |
| 1092 |
if($this->axis_no == 0) |
| 1093 |
$pos -= $size; |
| 1094 |
} |
| 1095 |
|
| 1096 |
return compact('sz', 'pos', 'line', 'full', 'box', 'box_len', 'box_line', |
| 1097 |
'box_pos'); |
| 1098 |
} |
| 1099 |
} |
| 1100 |
|
