142 lines
5.0 KiB
PHP
142 lines
5.0 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 Plot
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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: Area.php,v 1.10 2005/08/03 21:21:52 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/Plot/Smoothed/Bezier.php
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*/
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require_once 'Image/Graph/Plot/Smoothed/Bezier.php';
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/**
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* Bezier smoothed area chart
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*
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* Similar to an {@link Image_Graph_Plot_Area}, but the interconnecting lines
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* between two datapoints are smoothed using a Bezier curve, which enables the
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* chart to appear as a nice curved plot instead of the sharp edges of a
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* conventional {@link Image_Graph_Plot_Area}. Smoothed charts are only supported
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* with non-stacked types
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*
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* @category Images
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* @package Image_Graph
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* @subpackage Plot
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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_Plot_Smoothed_Area extends Image_Graph_Plot_Smoothed_Bezier
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{
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/**
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* Perform the actual drawing on the legend.
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*
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* @param int $x0 The top-left x-coordinate
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* @param int $y0 The top-left y-coordinate
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* @param int $x1 The bottom-right x-coordinate
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* @param int $y1 The bottom-right y-coordinate
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* @access private
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*/
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function _drawLegendSample($x0, $y0, $x1, $y1)
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{
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$this->_canvas->addVertex(array('x' => $x0, 'y' => $y1));
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$this->_addSamplePoints($x0, $y0, $x1, $y1);
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$this->_canvas->addVertex(array('x' => $x1, 'y' => $y1));
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$this->_canvas->polygon(array('connect' => true));
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}
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/**
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* Output the Bezier smoothed plot as an Area Chart
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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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$this->_canvas->startGroup(get_class($this) . '_' . $this->_title);
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$keys = array_keys($this->_dataset);
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foreach ($keys as $key) {
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$dataset =& $this->_dataset[$key];
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$dataset->_reset();
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$first = true;
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while ($p1 = $dataset->_next()) {
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$p0 = $dataset->_nearby(-2);
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$p2 = $dataset->_nearby(0);
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$p3 = $dataset->_nearby(1);
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if ($first) {
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$p = $p1;
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$p['Y'] = '#min_pos#';
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$x = $this->_pointX($p);
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$y = $this->_pointY($p);
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$this->_canvas->addVertex(array('x' => $x, 'y' => $y));
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}
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if ($p2) {
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$cp = $this->_getControlPoints($p1, $p0, $p2, $p3);
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$this->_canvas->addSpline(
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array(
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'x' => $cp['X'],
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'y' => $cp['Y'],
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'p1x' => $cp['P1X'],
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'p1y' => $cp['P1Y'],
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'p2x' => $cp['P2X'],
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'p2y' => $cp['P2Y']
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)
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);
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} else {
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$x = $this->_pointX($p1);
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$y = $this->_pointY($p1);
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$this->_canvas->addVertex(array('x' => $x, 'y' => $y));
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}
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$lastPoint = $p1;
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$first = false;
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}
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$lastPoint['Y'] = '#min_pos#';
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$x = $this->_pointX($lastPoint);
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$y = $this->_pointY($lastPoint);
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$this->_canvas->addVertex(array('x' => $x, 'y' => $y));
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$this->_getFillStyle($key);
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$this->_getLineStyle($key);
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$this->_canvas->polygon(array('connect' => true));
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}
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unset($keys);
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$this->_drawMarker();
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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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