124 lines
3.8 KiB
PHP
124 lines
3.8 KiB
PHP
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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* Class file containing a axis marker used for explicitly highlighting a point
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* (line) on the graph, based on an value specified on an axis.
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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: Line.php,v 1.11 2005/08/03 21:21:58 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/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 grid
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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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*/
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class Image_Graph_Axis_Marker_Line extends Image_Graph_Grid
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{
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/**
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* The value
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* @var double
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* @access private
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*/
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var $_value = false;
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/**
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* Sets the value of the line marker (value on the axis)
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*
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* @param double $value the value
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*/
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function setValue($value)
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{
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$this->_value = $value;
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}
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/**
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* Output the grid
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*
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* @return bool Was the output 'good' (true) or 'bad' (false).
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* @access private
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*/
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function _done()
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{
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if (parent::_done() === false) {
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return false;
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}
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if (!$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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$i = 0;
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$this->_value = min($this->_primaryAxis->_getMaximum(), max($this->_primaryAxis->_getMinimum(), $this->_value));
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$secondaryPoints = $this->_getSecondaryAxisPoints();
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reset($secondaryPoints);
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list ($id, $previousSecondaryValue) = each($secondaryPoints);
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while (list ($id, $secondaryValue) = each($secondaryPoints)) {
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if ($this->_primaryAxis->_type == IMAGE_GRAPH_AXIS_X) {
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$p1 = array ('X' => $this->_value, 'Y' => $secondaryValue);
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$p2 = array ('X' => $this->_value, 'Y' => $previousSecondaryValue);
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} else {
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$p1 = array ('X' => $secondaryValue, 'Y' => $this->_value);
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$p2 = array ('X' => $previousSecondaryValue, 'Y' => $this->_value);
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}
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$x1 = $this->_pointX($p1);
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$y1 = $this->_pointY($p1);
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$x2 = $this->_pointX($p2);
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$y2 = $this->_pointY($p2);
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$previousSecondaryValue = $secondaryValue;
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$this->_getLineStyle();
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$this->_canvas->line(array('x0' => $x1, 'y0' => $y1, 'x1' => $x2, 'y1' => $y2));
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}
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$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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