111 lines
3.4 KiB
PHP
111 lines
3.4 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* Image_Graph - PEAR PHP OO Graph Rendering Utility.
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*
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* PHP versions 4 and 5
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*
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* LICENSE: This library 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 2.1 of the License, or (at your
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* option) any later version. This library is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
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* General Public License for more details. You should have received a copy of
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* the GNU Lesser General Public License along with this library; if not, write
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* to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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* 02111-1307 USA
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*
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* @category Images
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* @package Image_Graph
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* @subpackage Grid
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* @author Jesper Veggerby <pear.nosey@veggerby.dk>
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* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
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* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
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* @version CVS: $Id: Polar.php,v 1.10 2005/08/24 20:36:04 nosey Exp $
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* @link http://pear.php.net/package/Image_Graph
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* @since File available since Release 0.3.0dev2
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*/
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/**
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* Include file Image/Graph/Grid.php
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*/
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require_once 'Image/Graph/Grid.php';
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/**
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* Display a line grid on the plotarea.
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*
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* {@link Image_Graph_Grid}
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*
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* @category Images
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* @package Image_Graph
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* @subpackage Grid
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* @author Jesper Veggerby <pear.nosey@veggerby.dk>
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* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
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* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
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* @version Release: @package_version@
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* @link http://pear.php.net/package/Image_Graph
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* @since Class available since Release 0.3.0dev2
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*/
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class Image_Graph_Grid_Polar extends Image_Graph_Grid
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{
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/**
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* GridLines [Constructor]
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*/
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function Image_Graph_Grid_Polar()
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{
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parent::Image_Graph_Grid();
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$this->_lineStyle = 'lightgrey';
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}
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/**
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* Output the grid
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*
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* @return bool Was the output 'good' (true) or 'bad' (false).
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* @access private
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*/
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function _done()
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{
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if (parent::_done() === false) {
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return false;
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}
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if (!$this->_primaryAxis) {
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return false;
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}
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$this->_canvas->startGroup(get_class($this));
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$value = false;
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$p0 = array ('X' => '#min#', 'Y' => '#min#');
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if ($this->_primaryAxis->_type == IMAGE_GRAPH_AXIS_Y) {
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$p1 = array ('X' => '#min#', 'Y' => '#max#');
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$r0 = abs($this->_pointY($p1) - $this->_pointY($p0));
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} else {
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$p1 = array ('X' => '#max#', 'Y' => '#min#');
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$r0 = abs($this->_pointX($p1) - $this->_pointX($p0));
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}
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$cx = $this->_pointX($p0);
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$cy = $this->_pointY($p0);
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$span = $this->_primaryAxis->_axisSpan;
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while (($value = $this->_primaryAxis->_getNextLabel($value)) !== false) {
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$r = $r0 * ($value - $this->_primaryAxis->_getMinimum()) / $span;
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$this->_getLineStyle();
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$this->_canvas->ellipse(array('x' => $cx, 'y' => $cy, 'rx' => $r, 'ry' => $r));
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}
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$this->_canvas->endGroup();
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return true;
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}
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}
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?>
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