105 lines
3.7 KiB
PHP
105 lines
3.7 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 Marker
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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: Angular.php,v 1.5 2005/08/24 20:36:03 nosey Exp $
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* @link http://pear.php.net/package/Image_Graph
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*/
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/**
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* Include file Image/Graph/Marker/Pointing.php
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*/
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require_once 'Image/Graph/Marker/Pointing.php';
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/**
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* Marker that points 'away' from the graph.
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*
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* Use this as a marker for displaying another marker pointing to the original
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* point on the graph - where the 'pointer' is calculated as line orthogonal to
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* a line drawn between the points neighbours to both sides (an approximate
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* tangent). This should make an the pointer appear to point 'straight' out from
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* the graph. The 'head' of the pointer is then another marker of any choice.
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*
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* @category Images
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* @package Image_Graph
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* @subpackage Marker
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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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*/
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class Image_Graph_Marker_Pointing_Angular extends Image_Graph_Marker_Pointing
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{
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/**
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* The length of the angular marker
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* @var int
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* @access private
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*/
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var $_radius;
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/**
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* Image_Graph_AngularPointingMarker [Constructor]
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* @param int $radius The 'length' of the pointer
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* @param Marker $markerEnd The ending marker that represents 'the head of
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* the pin'
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*/
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function Image_Graph_Marker_Pointing_Angular($radius, & $markerEnd)
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{
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parent::Image_Graph_Marker_Pointing(0, 0, $markerEnd);
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$this->_radius = $radius;
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}
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/**
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* Draw the marker on the canvas
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* @param int $x The X (horizontal) position (in pixels) of the marker on
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* the canvas
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* @param int $y The Y (vertical) position (in pixels) of the marker on the
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* canvas
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* @param array $values The values representing the data the marker 'points'
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* to
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* @access private
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*/
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function _drawMarker($x, $y, $values = false)
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{
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if ((isset($values['LENGTH'])) && ($values['LENGTH'] != 0)) {
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$this->_deltaX = - $values['AX'] * $this->_radius / $values['LENGTH'];
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$this->_deltaY = - $values['AY'] * $this->_radius / $values['LENGTH'];
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}
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if ((isset($values['NPY'])) && (isset($values['APY'])) &&
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(isset($values['PPY'])) && ($values['NPY'] > $values['APY']) &&
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($values['PPY'] > $values['APY']))
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{
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$this->_deltaX = - $this->_deltaX;
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$this->_deltaY = - $this->_deltaY;
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}
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parent::_drawMarker($x, $y, $values);
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}
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}
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?>
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