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<?php
/** Libchart - PHP chart library
*
* Copyright (C) 2005-2006 Jean-Marc Tr�meaux (jm.tremeaux at gmail.com)
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/**
* Horizontal bar chart
*
* @author Jean-Marc Tr�meaux (jm.tremeaux at gmail.com)
*/
class HorizontalChart extends BarChart
{
/**
* Creates a new horizontal bar chart
*
* @access public
* @param integer width of the image
* @param integer height of the image
*/
function HorizontalChart($width = 600, $height = 250)
{
parent::BarChart($width, $height);
$this->setLabelMarginLeft(150);
$this->setLabelMarginRight(30);
$this->setLabelMarginTop(40);
$this->setLabelMarginBottom(30);
}
/**
* Print the axis
*
* @access private
*/
function printAxis()
{
// Check if some points were defined
if(!$this->sampleCount)
return;
$minValue = $this->axis->getLowerBoundary();
$maxValue = $this->axis->getUpperBoundary();
$stepValue = $this->axis->getTics();
// Horizontal axis
for($value = $minValue; $value <= $maxValue; $value += $stepValue)
{
$x = $this->graphTLX + ($value - $minValue) * ($this->graphBRX - $this->graphTLX) / ($this->axis->displayDelta);
imagerectangle($this->img, $x - 1, $this->graphBRY + 2, $x, $this->graphBRY + 3, $this->axisColor1->getColor($this->img));
imagerectangle($this->img, $x - 1, $this->graphBRY, $x, $this->graphBRY + 1, $this->axisColor2->getColor($this->img));
$this->text->printText($this->img, $x, $this->graphBRY + 5, $this->textColor, $value, $this->text->fontCondensed, $this->text->HORIZONTAL_CENTER_ALIGN);
}
// Vertical Axis
$rowHeight = ($this->graphBRY - $this->graphTLY) / $this->sampleCount;
reset($this->point);
for($i = 0; $i <= $this->sampleCount; $i++)
{
$y = $this->graphBRY - $i * $rowHeight;
imagerectangle($this->img, $this->graphTLX - 3, $y, $this->graphTLX - 2, $y + 1, $this->axisColor1->getColor($this->img));
imagerectangle($this->img, $this->graphTLX - 1, $y, $this->graphTLX, $y + 1, $this->axisColor2->getColor($this->img));
if($i < $this->sampleCount)
{
$point = current($this->point);
next($this->point);
$text = $point->getX();
$this->text->printText($this->img, $this->graphTLX - 5, $y - $rowHeight / 2, $this->textColor, $text, $this->text->fontCondensed, $this->text->HORIZONTAL_RIGHT_ALIGN | $this->text->VERTICAL_CENTER_ALIGN);
}
}
}
/**
* Print the bars
*
* @access private
*/
function printBar()
{
// Check if some points were defined
if(!$this->sampleCount)
return;
reset($this->point);
$minValue = $this->axis->getLowerBoundary();
$maxValue = $this->axis->getUpperBoundary();
$stepValue = $this->axis->getTics();
$rowHeight = ($this->graphBRY - $this->graphTLY) / $this->sampleCount;
for($i = 0; $i < $this->sampleCount; $i++)
{
$y = $this->graphBRY - $i * $rowHeight;
$point = current($this->point);
next($this->point);
$value = $point->getY();
$xmax = $this->graphTLX + ($value - $minValue) * ($this->graphBRX - $this->graphTLX) / ($this->axis->displayDelta);
$this->text->printText($this->img, $xmax + 5, $y - $rowHeight / 2, $this->textColor, $value, $this->text->fontCondensed, $this->text->VERTICAL_CENTER_ALIGN);
// Horizontal bar
$y1 = $y - $rowHeight * 4 / 5;
$y2 = $y - $rowHeight * 1 / 5;
imagefilledrectangle($this->img, $this->graphTLX + 1, $y1, $xmax, $y2, $this->barColor2->getColor($this->img));
imagefilledrectangle($this->img, $this->graphTLX + 2, $y1+1, $xmax - 4, $y2, $this->barColor1->getColor($this->img));
}
}
/**
* Render the chart image
*
* @access public
* @param string name of the file to render the image to (optional)
*/
function render($fileName = null)
{
$this->computeBound();
$this->computeLabelMargin();
$this->createImage();
$this->printLogo();
$this->printTitle();
$this->printAxis();
$this->printBar();
if(isset($fileName))
imagepng($this->img, $fileName);
else
imagepng($this->img);
}
}
?>
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