<?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 Plot
* @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: CandleStick.php,v 1.12 2005/11/27 22:21:16 nosey Exp $
* @link http://pear.php.net/package/Image_Graph
* @since File available since Release 0.3.0dev2
*/
/**
* Include file Image/Graph/Plot.php
*/
require_once 'Image/Graph/Plot.php';
/**
* Candlestick chart.
*
* @category Images
* @package Image_Graph
* @subpackage Plot
* @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
* @since Class available since Release 0.3.0dev2
*/
class Image_Graph_Plot_CandleStick extends Image_Graph_Plot
{
/**
* (Add basic description here)
*
* @access private
*/
function _drawCandleStickH($y, $h, $x_min, $x_open, $x_close, $x_max, $ID)
{
$this->_getLineStyle($ID);
$this->_canvas->line(
array(
'x0' => min($x_open, $x_close),
'y0' => $y,
'x1' => $x_min,
'y1' => $y
)
);
$this->_getLineStyle($ID);
$this->_canvas->line(
array(
'x0' => max($x_open, $x_close),
'y0' => $y,
'x1' => $x_max,
'y1' => $y
)
);
$this->_getLineStyle($ID);
$this->_getFillStyle($ID);
$this->_canvas->rectangle(
array(
'x0' => min($x_open, $x_close),
'y0' => $y - $h,
'x1' => max($x_open, $x_close),
'y1' => $y + $h
)
);
}
/**
* (Add basic description here)
*
* @access private
*/
function _drawCandleStickV($x, $w, $y_min, $y_open, $y_close, $y_max, $ID)
{
$this->_getLineStyle($ID);
$this->_canvas->line(
array(
'x0' => $x,
'y0' => min($y_open, $y_close),
'x1' => $x,
'y1' => $y_max
)
);
$this->_getLineStyle($ID);
$this->_canvas->line(
array(
'x0' => $x,
'y0' => max($y_open, $y_close),
'x1' => $x,
'y1' => $y_min
)
);
$this->_getLineStyle($ID);
$this->_getFillStyle($ID);
$this->_canvas->rectangle(
array(
'x0' => $x - $w,
'y0' => min($y_open, $y_close),
'x1' => $x + $w,
'y1' => max($y_open, $y_close)
)
);
}
/**
* Perform the actual drawing on the legend.
*
* @param int $x0 The top-left x-coordinate
* @param int $y0 The top-left y-coordinate
* @param int $x1 The bottom-right x-coordinate
* @param int $y1 The bottom-right y-coordinate
* @access private
*/
function _drawLegendSample($x0, $y0, $x1, $y1)
{
$x = round(($x0 + $x1) / 2);
$h = abs($y1 - $y0) / 4;
$w = round(abs($x1 - $x0) / 5);
$this->_drawCandleStickV($x, $w, $y1, $y1 - $h, $y0 + $h, $y0, 'green');
}
/**
* Output the plot
*
* @return bool Was the output 'good' (true) or 'bad' (false).
* @access private
*/
function _done()
{
if (parent::_done() === false) {
return false;
}
if (!is_array($this->_dataset)) {
return false;
}
$this->_canvas->startGroup(get_class($this) . '_' . $this->_title);
$this->_clip(true);
if ($this->_multiType == 'stacked100pct') {
$total = $this->_getTotals();
}
$current = array();
$number = 0;
$width = floor(0.8 * $this->_parent->_labelDistance(IMAGE_GRAPH_AXIS_X) / 2);
$lastClosed = false;
$keys = array_keys($this->_dataset);
foreach ($keys as $key) {
$dataset =& $this->_dataset[$key];
$dataset->_reset();
while ($data = $dataset->_next()) {
if ($this->_parent->_horizontal) {
$point['X'] = $data['X'];
//$y = $data['Y'];
if (isset($data['Y']['open'])) {
$point['Y'] = $data['Y']['open'];
} else {
$point['Y'] = $lastClosed;
}
$y = $this->_pointY($point);
$x_open = $this->_pointX($point);
$lastClosed = $point['Y'] = $data['Y']['close'];
$x_close = $this->_pointX($point);
$point['Y'] = $data['Y']['min'];
$x_min = $this->_pointX($point);
$point['Y'] = $data['Y']['max'];
$x_max = $this->_pointX($point);
if ($data['Y']['close'] < $data['Y']['open']) {
$ID = 'red';
} else {
$ID = 'green';
}
$this->_drawCandleStickH($y, $width, $x_min, $x_open, $x_close, $x_max, $ID);
}
else {
$point['X'] = $data['X'];
//$y = $data['Y'];
if (isset($data['Y']['open'])) {
$point['Y'] = $data['Y']['open'];
} else {
$point['Y'] = $lastClosed;
}
$x = $this->_pointX($point);
$y_open = $this->_pointY($point);
$lastClosed = $point['Y'] = $data['Y']['close'];
$y_close = $this->_pointY($point);
$point['Y'] = $data['Y']['min'];
$y_min = $this->_pointY($point);
$point['Y'] = $data['Y']['max'];
$y_max = $this->_pointY($point);
if ($data['Y']['close'] < $data['Y']['open']) {
$ID = 'red';
} else {
$ID = 'green';
}
$this->_drawCandleStickV($x, $width, $y_min, $y_open, $y_close, $y_max, $ID);
}
}
}
unset($keys);
$this->_drawMarker();
$this->_clip(false);
$this->_canvas->endGroup($this->_title);
return true;
}
}
?>