<?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: Bar.php,v 1.13 2005/08/24 16:02:49 nosey Exp $
* @link http://pear.php.net/package/Image_Graph
*/
/**
* Include file Image/Graph/Plot.php
*/
require_once 'Image/Graph/Plot.php';
/**
* A bar 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
*/
class Image_Graph_Plot_Bar extends Image_Graph_Plot
{
/**
* The space between 2 bars (should be a multipla of 2)
* @var int
* @access private
*/
var $_space = 4;
/**
* The width of the bars
* @var array
* @access private
*/
var $_width = 'auto';
/**
* 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)
{
$dx = abs($x1 - $x0) / 7;
$this->_canvas->rectangle(array('x0' => $x0 + $dx, 'y0' => $y0, 'x1' => $x1 - $dx, 'y1' => $y1));
}
/**
* Set the spacing between 2 neighbouring bars
*
* @param int $space The number of pixels between 2 bars, should be a
* multipla of 2 (ie an even number)
*/
function setSpacing($space)
{
$this->_space = (int) ($space / 2);
}
/**
* Set the width of a bars.
*
* Specify 'auto' to auto calculate the width based on the positions on the
* x-axis.
*
* Supported units are:
*
* '%' The width is specified in percentage of the total plot width
*
* 'px' The width specified in pixels
*
* @param string $width The width of any bar
* @param string $unit The unit of the width
*/
function setBarWidth($width, $unit = false)
{
if ($width == 'auto') {
$this->_width = $width;
} else {
$this->_width = array(
'width' => $width,
'unit' => $unit
);
}
}
/**
* Output the plot
*
* @return bool Was the output 'good' (true) or 'bad' (false).
* @access private
*/
function _done()
{
if (parent::_done() === false) {
return false;
}
if (!is_array($this->_dataset)) {
return false;
}
$this->_canvas->startGroup(get_class($this) . '_' . $this->_title);
if ($this->_width == 'auto') {
$width = $this->_parent->_labelDistance(IMAGE_GRAPH_AXIS_X) / 2;
} elseif ($this->_width['unit'] == '%') {
$width = $this->_width['width'] * $this->width() / 200;
} elseif ($this->_width['unit'] == 'px') {
$width = $this->_width['width'] / 2;
}
if ($this->_multiType == 'stacked100pct') {
$total = $this->_getTotals();
}
$minYaxis = $this->_parent->_getMinimum($this->_axisY);
$maxYaxis = $this->_parent->_getMaximum($this->_axisY);
$number = 0;
$keys = array_keys($this->_dataset);
foreach ($keys as $key) {
$dataset =& $this->_dataset[$key];
$dataset->_reset();
while ($point = $dataset->_next()) {
if ($this->_parent->_horizontal) {
$y1 = $this->_pointY($point) - $width;
$y2 = $this->_pointY($point) + $width;
if ($y2 - $this->_space > $y1 + $this->_space) {
/*
* Take bar spacing into account _only_ if the space doesn't
* turn the bar "inside-out", i.e. if the actual bar width
* is smaller than the space between the bars
*/
$y2 -= $this->_space;
$y1 += $this->_space;
}
}
else {
$x1 = $this->_pointX($point) - $width;
$x2 = $this->_pointX($point) + $width;
if ($x2 - $this->_space > $x1 + $this->_space) {
/*
* Take bar spacing into account _only_ if the space doesn't
* turn the bar "inside-out", i.e. if the actual bar width
* is smaller than the space between the bars
*/
$x2 -= $this->_space;
$x1 += $this->_space;
}
}
if (($this->_multiType == 'stacked') ||
($this->_multiType == 'stacked100pct'))
{
$x = $point['X'];
if ($point['Y'] >= 0) {
if (!isset($current[$x])) {
$current[$x] = 0;
}
if ($this->_multiType == 'stacked') {
$p0 = array(
'X' => $point['X'],
'Y' => $current[$x]
);
$p1 = array(
'X' => $point['X'],
'Y' => $current[$x] + $point['Y']
);
} else {
$p0 = array(
'X' => $point['X'],
'Y' => 100 * $current[$x] / $total['TOTAL_Y'][$x]
);
$p1 = array(
'X' => $point['X'],
'Y' => 100 * ($current[$x] + $point['Y']) / $total['TOTAL_Y'][$x]
);
}
$current[$x] += $point['Y'];
} else {
if (!isset($currentNegative[$x])) {
$currentNegative[$x] = 0;
}
$p0 = array(
'X' => $point['X'],
'Y' => $currentNegative[$x]
);
$p1 = array(
'X' => $point['X'],
'Y' => $currentNegative[$x] + $point['Y']
);
$currentNegative[$x] += $point['Y'];
}
} else {
if (count($this->_dataset) > 1) {
$w = 2 * ($width - $this->_space) / count($this->_dataset);
if ($this->_parent->_horizontal) {
$y2 = ($y1 = ($y1 + $y2) / 2 - ($width - $this->_space) + $number * $w) + $w;
}
else {
$x2 = ($x1 = ($x1 + $x2) / 2 - ($width - $this->_space) + $number * $w) + $w;
}
}
$p0 = array('X' => $point['X'], 'Y' => 0);
$p1 = $point;
}
if ((($minY = min($p0['Y'], $p1['Y'])) < $maxYaxis) &&
(($maxY = max($p0['Y'], $p1['Y'])) > $minYaxis)
) {
$p0['Y'] = $minY;
$p1['Y'] = $maxY;
if ($p0['Y'] < $minYaxis) {
$p0['Y'] = '#min_pos#';
}
if ($p1['Y'] > $maxYaxis) {
$p1['Y'] = '#max_neg#';
}
if ($this->_parent->_horizontal) {
$x1 = $this->_pointX($p0);
$x2 = $this->_pointX($p1);
}
else {
$y1 = $this->_pointY($p0);
$y2 = $this->_pointY($p1);
}
$ID = $point['ID'];
if (($ID === false) && (count($this->_dataset) > 1)) {
$ID = $key;
}
$this->_getFillStyle($ID);
$this->_getLineStyle($ID);
if (($y1 != $y2) && ($x1 != $x2)) {
$this->_canvas->rectangle(
$this->_mergeData(
$point,
array(
'x0' => min($x1, $x2),
'y0' => min($y1, $y2),
'x1' => max($x1, $x2),
'y1' => max($y1, $y2)
)
)
);
}
}
}
$number ++;
}
unset($keys);
$this->_drawMarker();
$this->_canvas->endGroup();
return true;
}
}
?>