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khosb/includes/pear/Image/Graph/Plotarea/Radar.php
2008-11-26 14:50:40 -08:00

243 lines
7.3 KiB
PHP

<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Image_Graph - PEAR PHP OO Graph Rendering Utility.
*
* PHP versions 4 and 5
*
* LICENSE: This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version. This library is distributed in the hope that it
* will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
* General Public License for more details. You should have received a copy of
* the GNU Lesser General Public License along with this library; if not, write
* to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*
* @category Images
* @package Image_Graph
* @subpackage Plotarea
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version CVS: $Id: Radar.php,v 1.7 2005/08/24 20:36:02 nosey Exp $
* @link http://pear.php.net/package/Image_Graph
*/
/**
* Include file Image/Graph/Plotarea.php
*/
require_once 'Image/Graph/Plotarea.php';
/**
* Plot area used for radar plots.
*
* @category Images
* @package Image_Graph
* @subpackage Plotarea
* @author Jesper Veggerby <pear.nosey@veggerby.dk>
* @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
* @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
* @version Release: @package_version@
* @link http://pear.php.net/package/Image_Graph
*/
class Image_Graph_Plotarea_Radar extends Image_Graph_Plotarea
{
/**
* Create the plotarea, implicitely creates 2 normal axis
*/
function Image_Graph_Plotarea_Radar()
{
parent::Image_Graph_Element();
$this->_padding = 10;
$this->_axisX =& Image_Graph::factory('Image_Graph_Axis_Radar');
$this->_axisX->_setParent($this);
$this->_axisY =& Image_Graph::factory('Image_Graph_Axis', IMAGE_GRAPH_AXIS_Y);
$this->_axisY->_setParent($this);
$this->_axisY->_setMinimum(0);
}
/**
* Get the width of the 'real' plotarea
*
* @return int The width of the 'real' plotarea, ie not including space occupied by padding and axis
* @access private
*/
function _plotWidth()
{
return (min($this->height(), $this->width())) * 0.80;
}
/**
* Get the height of the 'real' plotarea
*
* @return int The height of the 'real' plotarea, ie not including space occupied by padding and axis
* @access private
*/
function _plotHeight()
{
return (min($this->height(), $this->width())) * 0.80;
}
/**
* Left boundary of the background fill area
*
* @return int Leftmost position on the canvas
* @access private
*/
function _fillLeft()
{
return (int) (($this->_left + $this->_right - $this->_plotWidth()) / 2);
}
/**
* Top boundary of the background fill area
*
* @return int Topmost position on the canvas
* @access private
*/
function _fillTop()
{
return (int) (($this->_top + $this->_bottom - $this->_plotHeight()) / 2);
}
/**
* Right boundary of the background fill area
*
* @return int Rightmost position on the canvas
* @access private
*/
function _fillRight()
{
return (int) (($this->_left + $this->_right + $this->_plotWidth()) / 2);
}
/**
* Bottom boundary of the background fill area
*
* @return int Bottommost position on the canvas
* @access private
*/
function _fillBottom()
{
return (int) (($this->_top + $this->_bottom + $this->_plotHeight()) / 2);
}
/**
* Get the X pixel position represented by a value
*
* @param double $value The value to get the pixel-point for
* @return double The pixel position along the axis
* @access private
*/
function _pointX($value)
{
if (is_array($value)) {
if ($value['Y'] == '#min#') {
$radius = 0;
} elseif (($value['Y'] == '#max#') || ($value['Y'] === false)) {
$radius = 1;
} else {
$radius = ($value['Y'] - $this->_axisY->_getMinimum()) /
($this->_axisY->_getMaximum() - $this->_axisY->_getMinimum());
}
$x = ($this->_left + $this->_right) / 2 -
$radius * ($this->_plotWidth() / 2) *
cos(deg2rad($this->_axisX->_point($value['X'])));
}
return max($this->_plotLeft, min($this->_plotRight, $x));
}
/**
* Get the Y pixel position represented by a value
*
* @param double $value The value to get the pixel-point for
* @return double The pixel position along the axis
* @access private
*/
function _pointY($value)
{
if (is_array($value)) {
if ($value['Y'] == '#min#') {
$radius = 0;
} elseif (($value['Y'] == '#max#') || ($value['Y'] === false)) {
$radius = 1;
} else {
$radius = ($value['Y'] - $this->_axisY->_getMinimum()) /
($this->_axisY->_getMaximum() - $this->_axisY->_getMinimum());
}
$y = ($this->_top + $this->_bottom) / 2 -
$radius * ($this->_plotHeight() / 2) *
sin(deg2rad($this->_axisX->_point($value['X'])));
}
return max($this->_plotTop, min($this->_plotBottom, $y));
}
/**
* Update coordinates
*
* @access private
*/
function _updateCoords()
{
if (is_array($this->_elements)) {
$keys = array_keys($this->_elements);
foreach ($keys as $key) {
$element =& $this->_elements[$key];
if (is_a($element, 'Image_Graph_Plot')) {
$this->_setExtrema($element);
}
}
unset($keys);
}
$this->_calcEdges();
$centerX = (int) (($this->_left + $this->_right) / 2);
$centerY = (int) (($this->_top + $this->_bottom) / 2);
$radius = min($this->_plotHeight(), $this->_plotWidth()) / 2;
if (is_object($this->_axisX)) {
$this->_axisX->_setCoords(
$centerX - $radius,
$centerY - $radius,
$centerX + $radius,
$centerY + $radius
);
}
if (is_object($this->_axisY)) {
$this->_axisY->_setCoords(
$centerX,
$centerY,
$centerX - $radius,
$centerY - $radius
);
}
$this->_plotLeft = $this->_fillLeft();
$this->_plotTop = $this->_fillTop();
$this->_plotRight = $this->_fillRight();
$this->_plotBottom = $this->_fillBottom();
Image_Graph_Element::_updateCoords();
if (is_object($this->_axisX)) {
$this->_axisX->_updateCoords();
}
if (is_object($this->_axisY)) {
$this->_axisY->_updateCoords();
}
}
}
?>