restructuring of boca's git

11 files changed, 1802 insertions, 0 deletions

diff --git a/src/libchart/classes/Axis.php b/src/libchart/classes/Axis.php
new file mode 100644
index 0000000..c80fe97
--- /dev/null
+++ b/src/libchart/classes/Axis.php
@@ -0,0 +1,167 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (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
+	* 
+	*/
+	
+	/**
+	* Automatic axis boundaries and ticks calibration
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	*/
+
+	class Axis
+	{
+		/**
+		* Creates a new axis formatter
+		*
+		* @access	public
+    		* @param	integer		minimum value on the axis
+    		* @param	integer		maximum value on the axis
+		*/
+		
+		function Axis($min, $max)
+		{
+			$this->min = $min;
+			$this->max = $max;
+
+			$this->guide = 10;
+		}
+
+		/**
+		* Computes value between two ticks
+		*
+		* @access	private
+		*/
+
+		function quantizeTics()
+		{
+			// Approximate number of decades, in [1..10[
+
+			$norm = $this->delta / $this->magnitude;
+
+			// Approximate number of tics per decade
+
+			$posns = $this->guide / $norm;
+
+		    	if ($posns > 20)
+				$tics = 0.05;		// e.g. 0, .05, .10, ...
+			else
+			if ($posns > 10)
+				$tics = 0.2;		// e.g.  0, .1, .2, ...
+			else
+			if ($posns > 5)
+				$tics = 0.4;		// e.g.  0, 0.2, 0.4, ...
+			else
+			if ($posns > 3)
+				$tics = 0.5;		// e.g. 0, 0.5, 1, ...
+			else
+			if ($posns > 2)
+				$tics = 1;		// e.g. 0, 1, 2, ...
+			else
+			if ($posns > 0.25)
+				$tics = 2;		// e.g. 0, 2, 4, 6 
+			else
+				$tics = ceil($norm);
+			
+			$this->tics = $tics * $this->magnitude;
+		}
+
+		/**
+		* Computes automatic boundaries on the axis
+		*
+		* @access	public
+		*/
+
+		function computeBoundaries()
+		{
+			// Range
+
+			$this->delta = abs($this->max - $this->min);
+
+			// Check for null distribution
+			
+			if($this->delta == 0)
+				$this->delta = 1;
+			
+			// Order of magnitude of range
+
+			$this->magnitude = pow(10, floor(log10($this->delta)));
+			
+			$this->quantizeTics();
+
+			$this->displayMin = floor($this->min / $this->tics) * $this->tics;
+			$this->displayMax = ceil($this->max / $this->tics) * $this->tics;
+			$this->displayDelta = $this->displayMax - $this->displayMin;
+		
+			// Check for null distribution
+			
+			if($this->displayDelta == 0)
+				$this->displayDelta = 1;
+		}
+
+		/**
+		* Set boundaries on the axis. Theses values override the automatic values.
+		*
+		* @access	public
+		*/
+		
+		function setBoundaries($sampleCount, $yMinValue, $yMaxValue)
+		{
+			$this->sampleCount = $sampleCount;
+			$this->yMinValue = $yMinValue;
+			$this->yMaxValue = $yMaxValue;
+		}
+
+		/**
+		* Get the lower boundary on the axis
+		*
+		* @access	public
+		* @return	integer		lower boundary on the axis
+		*/
+
+		function getLowerBoundary()
+		{
+			return $this->displayMin;
+		}
+
+		/**
+		* Get the upper boundary on the axis
+		*
+		* @access	public
+		* @return	integer		upper boundary on the axis
+		*/
+
+		function getUpperBoundary()
+		{
+			return $this->displayMax;
+		}
+
+		/**
+		* Get the value between two ticks
+		*
+		* @access	public
+		* @return	integer		value between two ticks
+		*/
+
+		function getTics()
+		{
+			return $this->tics;
+		}
+	}
+?>
diff --git a/src/libchart/classes/BarChart.php b/src/libchart/classes/BarChart.php
new file mode 100644
index 0000000..5b658ca
--- /dev/null
+++ b/src/libchart/classes/BarChart.php
@@ -0,0 +1,172 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	* 	
+	* This library is free software; you can redistribute it and/or
+	* modify it under the terms of the GNU Lesser General Public
+	* License as published by the Free Software Foundation; either
+	* version 2.1 of the License, or (at your option) any later version.
+	* 
+	* This library is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+	* Lesser General Public License for more details.
+	* 
+	* You should have received a copy of the GNU Lesser General Public
+	* License along with this library; if not, write to the Free Software
+	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+	* 
+	*/
+	
+	/**
+	* Base bar chart class (horizontal or vertical)
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	* @abstract
+	*/
+
+	class BarChart extends Chart
+	{
+		/**
+		* Creates a new bar chart
+		*
+		* @access	protected
+    		* @param	integer		width of the image
+    		* @param	integer		height of the image
+		*/
+		
+		function BarChart($width, $height)
+		{
+			parent::Chart($width, $height);
+
+			$this->setMargin(5);
+			$this->setLowerBound(0);
+		}
+
+		/**
+		* Compute the boundaries on the axis
+		*
+		* @access	protected
+		*/
+		
+		function computeBound()
+		{
+			// Compute lower and upper bound on the value axis
+
+			$point = current($this->point);
+			
+			// Check if some points were defined
+			
+			if(!$point)
+			{
+				$yMin = 0;
+				$yMax = 1;
+			}
+			else
+			{
+				$yMax = $yMin = $point->getY();
+	
+				foreach($this->point as $point)
+				{
+					$y = $point->getY();
+	
+					if($y < $yMin)
+						$yMin = $y;
+	
+					if($y > $yMax)
+						$yMax = $y;
+				}
+			}
+
+			$this->yMinValue = isset($this->lowerBound) ? $this->lowerBound : $yMin;
+			$this->yMaxValue = isset($this->upperBound) ? $this->upperBound : $yMax;
+			
+			// Compute boundaries on the sample axis
+
+			$this->sampleCount = count($this->point);
+		}
+
+		/**
+		* Set manually the lower boundary value (overrides the automatic formatting)
+		* Typical usage is to set the bars starting from zero
+		*
+		* @access	public
+		* @param	double		lower boundary value
+		*/
+		
+		function setLowerBound($lowerBound)
+		{
+			$this->lowerBound = $lowerBound;
+		}
+
+		/**
+		* Set manually the upper boundary value (overrides the automatic formatting)
+		*
+		* @access	public
+		* @param	double		upper boundary value
+		*/
+		
+		function setUpperBound($upperBound)
+		{
+			$this->upperBound = $upperBound;
+		}
+
+		/**
+		* Compute the image layout
+		*
+		* @access	protected
+		*/
+		
+		function computeLabelMargin()
+		{
+			$this->axis = new Axis($this->yMinValue, $this->yMaxValue);
+			$this->axis->computeBoundaries();
+
+			$this->graphTLX = $this->margin + $this->labelMarginLeft;
+			$this->graphTLY = $this->margin + $this->labelMarginTop;
+			$this->graphBRX = $this->width - $this->margin - $this->labelMarginRight;
+			$this->graphBRY = $this->height - $this->margin - $this->labelMarginBottom;
+		}
+
+		/**
+		* Create the image
+		*
+		* @access	protected
+		*/
+		
+		function createImage()
+		{
+			parent::createImage();
+
+			$this->axisColor1 = new Color(201, 201, 201);
+			$this->axisColor2 = new Color(158, 158, 158);
+
+			$this->aquaColor1 = new Color(242, 242, 242);
+			$this->aquaColor2 = new Color(231, 231, 231);
+			$this->aquaColor3 = new Color(239, 239, 239);
+			$this->aquaColor4 = new Color(253, 253, 253);
+
+			$this->barColor1 = new Color(42, 71, 181);
+			$this->barColor2 = new Color(33, 56, 143);
+
+			$this->barColor3 = new Color(172, 172, 210);
+			$this->barColor4 = new Color(117, 117, 143);
+			
+			// Aqua-like background
+
+			$aquaColor = Array($this->aquaColor1, $this->aquaColor2, $this->aquaColor3, $this->aquaColor4);
+
+			for($i = $this->graphTLY; $i < $this->graphBRY; $i++)
+			{
+				$color = $aquaColor[($i + 3) % 4];
+				$this->primitive->line($this->graphTLX, $i, $this->graphBRX, $i, $color);
+			}
+
+			// Axis
+
+			imagerectangle($this->img, $this->graphTLX - 1, $this->graphTLY, $this->graphTLX, $this->graphBRY, $this->axisColor1->getColor($this->img));
+			imagerectangle($this->img, $this->graphTLX - 1, $this->graphBRY, $this->graphBRX, $this->graphBRY + 1, $this->axisColor1->getColor($this->img));
+		}
+	}
+?>
diff --git a/src/libchart/classes/Chart.php b/src/libchart/classes/Chart.php
new file mode 100644
index 0000000..639eabd
--- /dev/null
+++ b/src/libchart/classes/Chart.php
@@ -0,0 +1,213 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (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
+	* 
+	*/
+	
+	/*! \mainpage Libchart
+	*
+	* This is the reference API, automatically compiled by <a href="http://www.stack.nl/~dimitri/doxygen/">Doxygen</a>.
+        * You can find here information that is not covered by the <a href="../samplecode/">tutorial</a>.
+	*
+	*/
+
+	/**
+	* Base chart class
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	* @abstract
+	*/
+
+	class Chart
+	{
+		/**
+		* Creates a new chart
+		*
+		* @access	protected
+    		* @param	integer		width of the image
+    		* @param	integer		height of the image
+		*/
+		
+		function chart($width, $height)
+		{
+			$this->width = $width;
+			$this->height = $height;
+
+			$this->reset();
+		}
+
+		/**
+		* Initialize the chart
+		*
+		* @access	private
+		*/
+		
+		function reset()
+		{
+			$this->text = new Text();		
+			$this->point = array();
+
+			unset($this->lowerBound);
+			unset($this->upperBound);
+
+			$this->setTitle("Untitled chart");
+			$this->setLogo(dirname(__FILE__) . "/../images/PoweredBy.png");
+		}
+
+		/**
+		* Add a new sampling point to the chart
+		*
+		* @access	public
+		* @param	Point		sampling point to add
+		*/
+		
+		function addPoint($point)
+		{
+			array_push($this->point, $point);
+		}
+
+		/**
+		* Sets the title
+		*
+		* @access	public
+		* @param	string		new title
+		*/
+		
+		function setTitle($title)
+		{
+			$this->title = $title;
+		}
+
+		/**
+		* Sets the logo image file name
+		*
+		* @access	public
+		* @param	string		new logo image file name
+		*/
+		
+		function setLogo($logoFileName)
+		{
+			$this->logoFileName = $logoFileName;
+		}
+
+		/**
+		* Print the title to the image
+		*
+		* @access	private
+		*/
+		
+		function printTitle()
+		{
+			$this->text->printCentered($this->img, ($this->labelMarginTop + $this->margin) / 2, $this->textColor, $this->title, $this->text->fontCondensedBold);
+		}
+
+		/**
+		* Print the logo image to the image
+		*
+		* @access	private
+		*/
+		
+		function printLogo()
+		{
+			@$logoImage = imageCreateFromPNG($this->logoFileName);
+
+			if($logoImage)
+				imagecopymerge($this->img, $logoImage, 2*$this->margin, $this->margin, 0, 0, imagesx($logoImage), imagesy($logoImage), 100);
+		}
+
+		/**
+		* Set the outer margin
+		*
+		* @access	public
+		* @param	integer		outer margin value in pixels
+		*/
+		
+		function setMargin($margin)
+		{
+			$this->margin = $margin;
+		}
+
+		/**
+		* Set the label left margin
+		*
+		* @access	public
+		* @param	integer		label left margin value in pixels
+		*/
+		
+		function setLabelMarginLeft($labelMarginLeft)
+		{
+			$this->labelMarginLeft = $labelMarginLeft;
+		}
+
+		/**
+		* Set the label right margin
+		*
+		* @access	public
+		* @param	integer		label right margin value in pixels
+		*/
+		
+		function setLabelMarginRight($labelMarginRight)
+		{
+			$this->labelMarginRight = $labelMarginRight;
+		}
+
+		/**
+		* Set the label top margin
+		*
+		* @access	public
+		* @param	integer		label top margin value in pixels
+		*/
+		
+		function setLabelMarginTop($labelMarginTop)
+		{
+			$this->labelMarginTop = $labelMarginTop;
+		}
+
+		/**
+		* Set the label bottom margin
+		*
+		* @access	public
+		* @param	integer		label bottom margin value in pixels
+		*/
+		
+		function setLabelMarginBottom($labelMarginBottom)
+		{
+			$this->labelMarginBottom = $labelMarginBottom;
+		}
+
+		/**
+		* Creates and initialize the image
+		*
+		* @access	protected
+		*/
+		
+		function createImage()
+		{
+			$this->img = imagecreatetruecolor($this->width, $this->height);
+			
+			$this->primitive = new Primitive($this->img);
+
+			$this->backGroundColor = new Color(255, 255, 255);
+			$this->textColor = new Color(0, 0, 0);
+
+			// White background
+
+			imagefilledrectangle($this->img, 0, 0, $this->width - 1, $this->height - 1, $this->backGroundColor->getColor($this->img));
+		}
+	}
+?>
diff --git a/src/libchart/classes/Color.php b/src/libchart/classes/Color.php
new file mode 100644
index 0000000..178435b
--- /dev/null
+++ b/src/libchart/classes/Color.php
@@ -0,0 +1,74 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (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
+	* 
+	*/
+	
+	/**
+	* Color
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	*/
+
+	class Color
+	{
+		/**
+		* Creates a new color
+		*
+		* @access	public
+		* @param	integer		red [0,255]
+		* @param	integer		green [0,255]
+		* @param	integer		blue [0,255]
+		* @param	integer		alpha [0,255]
+		*/
+		
+		function Color($red, $green, $blue, $alpha = 0)
+		{
+			$this->red = (int)$red;
+			$this->green = (int)$green;
+			$this->blue = (int)$blue;
+			$this->alpha = (int)round($alpha * 127.0 / 255);
+			
+			$this->gdColor = null;
+		}
+		
+		/**
+		* Get GD color
+		*
+		* @access	public
+		* @param	$img		GD image resource
+		*/
+		
+		function getColor($img)
+		{
+			// Checks if color has already been allocated
+			
+			if(!$this->gdColor)
+			{
+				if($this->alpha == 0 || !function_exists('imagecolorallocatealpha'))
+					$this->gdColor = imagecolorallocate($img, $this->red, $this->green, $this->blue);
+				else
+					$this->gdColor = imagecolorallocatealpha($img, $this->red, $this->green, $this->blue, $this->alpha);
+			}
+			
+			// Returns GD color
+			
+			return $this->gdColor;
+		}
+	}
+?>
diff --git a/src/libchart/classes/HorizontalChart.php b/src/libchart/classes/HorizontalChart.php
new file mode 100644
index 0000000..4b4e069
--- /dev/null
+++ b/src/libchart/classes/HorizontalChart.php
@@ -0,0 +1,169 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	* 	
+	* This library is free software; you can redistribute it and/or
+	* modify it under the terms of the GNU Lesser General Public
+	* License as published by the Free Software Foundation; either
+	* version 2.1 of the License, or (at your option) any later version.
+	* 
+	* This library is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+	* Lesser General Public License for more details.
+	* 
+	* You should have received a copy of the GNU Lesser General Public
+	* License along with this library; if not, write to the Free Software
+	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+	* 
+	*/
+	
+	/**
+	* Horizontal bar chart
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	*/
+
+	class HorizontalChart extends BarChart
+	{
+		/**
+		* Creates a new horizontal bar chart
+		*
+		* @access	public
+    		* @param	integer		width of the image
+    		* @param	integer		height of the image
+		*/
+		
+		function HorizontalChart($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);
+		}
+	}
+?>
diff --git a/src/libchart/classes/LineChart.php b/src/libchart/classes/LineChart.php
new file mode 100644
index 0000000..9d44eba
--- /dev/null
+++ b/src/libchart/classes/LineChart.php
@@ -0,0 +1,171 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (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
+	* 
+	*/
+	
+	/**
+	* Line chart
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	*/
+
+	class LineChart extends BarChart
+	{
+		/**
+		* Creates a new line chart
+		*
+		* @access	public
+    		* @param	integer		width of the image
+    		* @param	integer		height of the image
+		*/
+		
+		function LineChart($width = 600, $height = 250)
+		{
+			parent::BarChart($width, $height);
+
+			$this->setLabelMarginLeft(50);
+			$this->setLabelMarginRight(50);
+			$this->setLabelMarginTop(40);
+			$this->setLabelMarginBottom(50);
+		}
+
+		/**
+		* Print the axis
+		*
+		* @access	private
+		*/
+		
+		function printAxis()
+		{
+			// Check if some points were defined
+			
+			if($this->sampleCount < 2)
+				return;
+			
+			$minValue = $this->axis->getLowerBoundary();
+			$maxValue = $this->axis->getUpperBoundary();
+			$stepValue = $this->axis->getTics();
+
+			// Line axis
+
+			for($value = $minValue; $value <= $maxValue; $value += $stepValue)
+			{
+				$y = $this->graphBRY - ($value - $minValue) * ($this->graphBRY - $this->graphTLY) / ($this->axis->displayDelta);
+
+				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));
+
+				$this->text->printText($this->img, $this->graphTLX - 5, $y, $this->textColor, $value, $this->text->fontCondensed, $this->text->HORIZONTAL_RIGHT_ALIGN | $this->text->VERTICAL_CENTER_ALIGN);
+			}
+
+			// Horizontal Axis
+
+			$columnWidth = ($this->graphBRX - $this->graphTLX) / ($this->sampleCount - 1);
+
+			reset($this->point);
+
+			for($i = 0; $i < $this->sampleCount; $i++)
+			{
+				$x = $this->graphTLX + $i * $columnWidth;
+
+				imagerectangle($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));
+
+				$point = current($this->point);
+				next($this->point);
+
+				$text = $point->getX();
+
+				$this->text->printDiagonal($this->img, $x - 5, $this->graphBRY + 10, $this->textColor, $text);
+			}
+		}
+
+		/**
+		* Print the lines
+		*
+		* @access	private
+		*/
+
+		function printLine()
+		{
+			// Check if some points were defined
+			
+			if($this->sampleCount < 2)
+				return;
+			
+			reset($this->point);
+
+			$minValue = $this->axis->getLowerBoundary();
+			$maxValue = $this->axis->getUpperBoundary();
+			
+			$columnWidth = ($this->graphBRX - $this->graphTLX) / ($this->sampleCount - 1);
+
+			$x1 = null;
+			$y1 = null;
+
+			for($i = 0; $i < $this->sampleCount; $i++)
+			{
+				$x2 = $this->graphTLX + $i * $columnWidth;
+
+				$point = current($this->point);
+				next($this->point);
+
+				$value = $point->getY();
+				
+				$y2 = $this->graphBRY - ($value - $minValue) * ($this->graphBRY - $this->graphTLY) / ($this->axis->displayDelta);
+
+//				$this->text->printText($this->img, $x2, $y2 - 5, $this->textColor, $value, $this->text->fontCondensed, $this->text->HORIZONTAL_CENTER_ALIGN | $this->text->VERTICAL_BOTTOM_ALIGN);
+
+				// Draw line 
+
+				if($x1)
+				{
+					$this->primitive->line($x1, $y1, $x2, $y2, $this->barColor4, 4);
+					$this->primitive->line($x1, $y1 - 1, $x2, $y2 - 1, $this->barColor3, 2);
+				}
+				
+				$x1 = $x2;
+				$y1 = $y2;
+			}
+		}
+		
+		/**
+		* Render the chart image
+		*
+		* @access	public
+		* @param	string		name of the file to render the image to (optional)
+		*/
+		
+		function render($fileName = null)
+		{
+			$this->computeBound();
+			$this->computeLabelMargin();
+			$this->createImage();
+			$this->printLogo();
+			$this->printTitle();
+			$this->printAxis();
+			$this->printLine();
+
+			if(isset($fileName))
+				imagepng($this->img, $fileName);
+			else
+				imagepng($this->img);
+		}
+	}
+?>
diff --git a/src/libchart/classes/PieChart.php b/src/libchart/classes/PieChart.php
new file mode 100644
index 0000000..dacbf2b
--- /dev/null
+++ b/src/libchart/classes/PieChart.php
@@ -0,0 +1,386 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (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
+	* 
+	*/
+	
+	/**
+	* Pie chart
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	*/
+
+	class PieChart extends Chart
+	{
+		/**
+		* Creates a new pie chart
+		*
+		* @access	public
+    		* @param	integer		width of the image
+    		* @param	integer		height of the image
+		*/
+		
+		function PieChart($width = 600, $height = 250)
+		{
+			parent::Chart($width, $height);
+
+			$this->setMargin(5);
+			$this->setLabelMarginLeft(30);
+			$this->setLabelMarginRight(30);
+			$this->setLabelMarginTop(50);
+			$this->setLabelMarginBottom(30);
+			$this->setLabelMarginCenter(20);
+
+			$this->setPieRatio(0.55);
+
+			$this->labelBoxWidth = 15;
+			$this->labelBoxHeight = 15;
+		}
+
+		/**
+		* Set the ratio of the pie image over the legend
+		*
+		* @access	public
+		* @param	double		ratio (value between 0 and 1)
+		*/
+		
+		function setPieRatio($pieRatio)
+		{
+			$this->pieRatio = $pieRatio;
+		}
+
+		/**
+		* Compare two sampling point values, order from biggest to lowest value
+		*
+		* @access	private
+		* @param	double		first value
+		* @param	double		second value
+		* @return	integer		result of the comparison
+		*/
+		
+		function sortPie($v1, $v2)
+		{
+			return $v1[0] == $v2[0] ? 0 :
+				$v1[0] > $v2[0] ? -1 :
+				1;
+		}
+		
+		/**
+		* Compute pie values in percentage and sort them
+		*
+		* @access	private
+		*/
+		
+		function computePercent()
+		{
+			$this->total = 0;
+			$this->percent = array();
+
+			foreach($this->point as $point)
+				$this->total += $point->getY();
+
+			foreach($this->point as $point)
+			{
+				$percent = $this->total == 0 ? 0 : 100 * $point->getY() / $this->total;
+
+				array_push($this->percent, array($percent, $point));
+			}
+			if($this->order)
+				usort($this->percent, array("PieChart", "sortPie"));
+		}
+
+		/**
+		* Set the margin between the pie image and the legend
+		*
+		* @access	public
+		* @param	integer		margin value in pixels
+		*/
+		
+		function setLabelMarginCenter($labelMarginCenter)
+		{
+			$this->labelMarginCenter = $labelMarginCenter;
+		}
+
+		/**
+		* Draw a gray box with nice borders
+		*
+		* @access	private
+		* @param	integer		top left coordinate (x)
+		* @param	integer		top left coordinate (y)
+		* @param	integer		bottom right coordinate (x)
+		* @param	integer		bottom right coordinate (y)
+		*/
+		
+		function outlinedBox($x1, $y1, $x2, $y2)
+		{
+			imagefilledrectangle($this->img, $x1, $y1, $x2, $y2, $this->axisColor1->getColor($this->img));
+			imagerectangle($this->img, $x1, $y1, $x1 + 1, $y1 + 1, $this->axisColor2->getColor($this->img));
+			imagerectangle($this->img, $x2 - 1, $y1, $x2, $y1 + 1, $this->axisColor2->getColor($this->img));
+			imagerectangle($this->img, $x1, $y2 - 1, $x1 + 1, $y2, $this->axisColor2->getColor($this->img));
+			imagerectangle($this->img, $x2 - 1, $y2 - 1, $x2, $y2, $this->axisColor2->getColor($this->img));
+		}
+
+		/**
+		* Compute image layout
+		*
+		* @access	private
+		*/
+		
+		function computeLabelMargin()
+		{
+			$graphWidth = $this->width - $this->margin * 2 - $this->labelMarginLeft - $this->labelMarginCenter - $this->labelMarginRight;
+			
+			$this->pieTLX = $this->margin + $this->labelMarginLeft;
+			$this->pieTLY = $this->margin + $this->labelMarginTop;
+			$this->pieBRX = $this->pieTLX + $graphWidth * $this->pieRatio;
+			$this->pieBRY = $this->height - $this->margin - $this->labelMarginBottom;
+			
+			$this->pieCenterX = $this->pieTLX + ($this->pieBRX - $this->pieTLX) / 2;
+			$this->pieCenterY = $this->pieTLY + ($this->pieBRY - $this->pieTLY) / 2;
+			
+			$this->pieWidth = round(($this->pieBRX - $this->pieTLX) * 4 / 5);
+			$this->pieHeight = round(($this->pieBRY - $this->pieTLY) * 3.7 / 5);
+			$this->pieDepth = round($this->pieWidth * 0.05);
+
+			$this->labelTLX = $this->pieBRX + $this->labelMarginCenter;
+			$this->labelTLY = $this->pieTLY;
+			$this->labelBRX = $this->pieTLX + $this->labelMarginCenter + $graphWidth;
+			$this->labelBRY = $this->pieBRY;
+
+		}
+
+		/**
+		* Creates the pie chart image
+		*
+		* @access	private
+		*/
+		
+		function createImage()
+		{
+			parent::createImage();
+
+			$pieColors = array(
+				array(2, 78, 0),
+				array(148, 170, 36),
+				array(233, 191, 49),
+				array(240, 127, 41),
+				array(243, 63, 34),
+				array(190, 71, 47),
+				array(135, 81, 60),
+				array(128, 78, 162),
+				array(121, 75, 255),
+				array(142, 165, 250),
+				array(162, 254, 239),
+				array(137, 240, 166),
+				array(104, 221, 71),
+				array(98, 174, 35),
+				array(93, 129, 1)
+			);
+
+			$this->pieColor = array();
+			$this->pieShadowColor = array();
+			$shadowFactor = 0.5;
+
+			foreach($pieColors as $colorRGB)
+			{
+				list($red, $green, $blue) = $colorRGB;
+
+				$color = new Color($red, $green, $blue);
+				$shadowColor = new Color($red * $shadowFactor, 
+							$green * $shadowFactor, 
+							$blue * $shadowFactor);
+
+				array_push($this->pieColor, $color);
+				array_push($this->pieShadowColor, $shadowColor);
+			}
+
+			$this->axisColor1 = new Color(201, 201, 201);
+			$this->axisColor2 = new Color(158, 158, 158);
+
+			$this->aquaColor1 = new Color(242, 242, 242);
+			$this->aquaColor2 = new Color(231, 231, 231);
+			$this->aquaColor3 = new Color(239, 239, 239);
+			$this->aquaColor4 = new Color(253, 253, 253);
+
+			// Legend box
+
+			$this->outlinedBox($this->pieTLX, $this->pieTLY, $this->pieBRX, $this->pieBRY);
+
+			// Aqua-like background
+
+			$aquaColor = Array($this->aquaColor1, $this->aquaColor2, $this->aquaColor3, $this->aquaColor4);
+
+			for($i = $this->pieTLY + 2; $i < $this->pieBRY - 1; $i++)
+			{
+				$color = $aquaColor[($i + 3) % 4];
+				$this->primitive->line($this->pieTLX + 2, $i, $this->pieBRX - 2, $i, $color);
+			}
+		}
+
+		/**
+		* Print legend
+		*
+		* @access	private
+		*/
+		
+		function printLabel()
+		{
+			$i = 0;
+
+			$boxX1 = $this->labelTLX + $this->margin;
+			$boxX2 = $boxX1 + $this->labelBoxWidth;
+
+			foreach($this->percent as $a)
+			{
+				list($percent, $point) = $a;
+				$legend = $point->getX();
+				
+				if($point->getColor() != null)
+					$color = $point->getColor();
+				else
+					$color = $this->pieColor[$i % count($this->pieColor)];
+
+				$boxY1 = $this->labelTLY + $this->margin + $i * ($this->labelBoxHeight + $this->margin);
+				$boxY2 = $boxY1 + $this->labelBoxHeight;
+
+				$this->outlinedBox($boxX1, $boxY1, $boxX2, $boxY2);
+				imagefilledrectangle($this->img, $boxX1 + 2, $boxY1 + 2, $boxX2 - 2, $boxY2 - 2, $color->getColor($this->img));
+
+				$this->text->printText($this->img, $boxX2 + $this->margin, $boxY1 + $this->labelBoxHeight / 2, $this->textColor, $legend, $this->text->fontCondensed, $this->text->VERTICAL_CENTER_ALIGN);
+
+				$i++;
+			}
+		}
+
+		/**
+		* Draw a 2D disc
+		*
+		* @access	private
+		* @param	integer		center coordinate (y)
+		* @param	array		colors for each portion
+		* @param	bitfield	drawing mode
+		*/
+		
+		function drawDisc($cy, $colorArray, $mode, $shad=false)
+		{
+			$i = 0;
+			$angle1 = 0;
+			$percentTotal = 0;
+
+			foreach($this->percent as $a)
+			{
+				list($percent, $point) = $a;
+
+				if($point->getColor() != null)
+					$color = $shad ? $point->getShadowColor() : $point->getColor();
+				else
+					$color = $colorArray[$i % count($colorArray)];
+
+				$percentTotal += $percent;
+				$angle2 = $percentTotal * 360 / 100;
+
+				imagefilledarc($this->img, $this->pieCenterX, $cy, $this->pieWidth, $this->pieHeight, $angle1, $angle2, $color->getColor($this->img), $mode);
+
+				$angle1 = $angle2;
+
+				$i++;
+			}
+		}
+
+		/**
+		* Print the percentage text
+		*
+		* @access	private
+		*/
+		
+		function drawPercent()
+		{
+			$angle1 = 0;
+			$percentTotal = 0;
+
+			foreach($this->percent as $a)
+			{
+				list($percent, $point) = $a;
+
+				// If value is null, don't print percentage
+				
+				if($percent <= 0)
+					continue;
+
+				$percentTotal += $percent;
+				$angle2 = $percentTotal * 2 * M_PI / 100;
+
+				$angle = $angle1 + ($angle2 - $angle1) / 2;
+				$text = number_format($percent) . "%";
+
+				$x = cos($angle) * ($this->pieWidth + 35) / 2 + $this->pieCenterX;
+				$y = sin($angle) * ($this->pieHeight + 35) / 2 + $this->pieCenterY;
+
+				$this->text->printText($this->img, $x, $y, $this->textColor, $text, $this->text->fontCondensed, $this->text->HORIZONTAL_CENTER_ALIGN | $this->text->VERTICAL_CENTER_ALIGN);
+
+				$angle1 = $angle2;
+			}
+		}
+
+		/**
+		* Print the pie chart
+		*
+		* @access	private
+		*/
+		
+		function printPie()
+		{
+			// Silhouette
+
+			for ($cy = $this->pieCenterY + $this->pieDepth / 2; $cy >= $this->pieCenterY - $this->pieDepth / 2; $cy--)
+				$this->drawDisc($cy, $this->pieShadowColor, IMG_ARC_EDGED, true);
+
+
+			// Top
+
+			$this->drawDisc($this->pieCenterY - $this->pieDepth / 2, $this->pieColor, IMG_ARC_PIE);
+
+			// Top Outline
+
+			$this->drawPercent();
+		}
+
+		/**
+		* Render the chart image
+		*
+		* @access	public
+		* @param	string		name of the file to render the image to (optional)
+		*/
+		
+		function render($fileName = null)
+		{
+			$this->computeLabelMargin();
+			$this->computePercent();
+			$this->createImage();
+			$this->printLogo();
+			$this->printTitle();
+			$this->printPie();
+			$this->printLabel();
+
+			if(isset($fileName))
+				imagepng($this->img, $fileName);
+			else
+				imagepng($this->img);
+		}
+	}
+?>
diff --git a/src/libchart/classes/Point.php b/src/libchart/classes/Point.php
new file mode 100644
index 0000000..5c0d9ec
--- /dev/null
+++ b/src/libchart/classes/Point.php
@@ -0,0 +1,83 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (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
+	* 
+	*/
+	
+	/**
+	* Sampling point
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	*/
+
+	class Point
+	{
+		/**
+		* Creates a new sampling point of coordinates (x, y)
+		*
+		* @access	public
+    		* @param	integer		x coordinate (label)
+    		* @param	integer		y coordinate (value)
+		* @param	array		color R,G,B
+		*/
+		
+		function Point($x, $y, $c=null)
+		{
+			$this->x = $x;
+			$this->y = $y;
+			if($c != null) {
+				list($r,$g,$b) = $c;
+				$this->color = new Color($r,$g,$b);
+				$shadowFactor = 0.5;
+                        	$this->shadowColor = new Color($r * $shadowFactor,
+                                	                        $g * $shadowFactor,
+                                        	                $b * $shadowFactor);
+			} else {
+				$this->color = null;
+				$this->shadowColor = null;
+			}
+		}
+
+		/**
+		* Gets the x coordinate (label)
+		*
+		* @access	public
+    		* @return	integer		x coordinate (label)
+		*/
+		
+		function getX()
+		{
+			return $this->x;
+		}
+
+		/**
+		* Gets the y coordinate (value)
+		*
+		* @access	public
+    		* @return	integer		y coordinate (value)
+		*/
+		
+		function getY()
+		{
+			return $this->y;
+		}
+
+		function getColor() { return $this->color; }
+		function getShadowColor() { return $this->shadowColor; }
+	}
+?>
diff --git a/src/libchart/classes/Primitive.php b/src/libchart/classes/Primitive.php
new file mode 100644
index 0000000..9e5a896
--- /dev/null
+++ b/src/libchart/classes/Primitive.php
@@ -0,0 +1,59 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	* 	
+	* This library is free software; you can redistribute it and/or
+	* modify it under the terms of the GNU Lesser General Public
+	* License as published by the Free Software Foundation; either
+	* version 2.1 of the License, or (at your option) any later version.
+	* 
+	* This library is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+	* Lesser General Public License for more details.
+	* 
+	* You should have received a copy of the GNU Lesser General Public
+	* License along with this library; if not, write to the Free Software
+	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+	* 
+	*/
+	
+	/**
+	* Graphic primitives, extends GD with chart related primitives
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	*/
+
+	class Primitive
+	{
+		/**
+		* Creates a new primitive object
+		*
+		* @access	public
+		* @param	resource	GD image resource
+		*/
+		
+		function Primitive($img)
+		{
+			$this->img = $img;
+		}
+		
+		/**
+		* Draws a straight line
+		*
+		* @access	public
+		* @param	integer		line start (X)
+		* @param	integer		line start (Y)
+		* @param	integer		line end (X)
+		* @param	integer		line end (Y)
+		* @param	Color		line color
+		*/
+		
+		function line($x1, $y1, $x2, $y2, $color, $width = 1)
+		{
+			imagefilledpolygon($this->img, array($x1, $y1 - $width / 2, $x1, $y1 + $width / 2, $x2, $y2 + $width / 2, $x2, $y2 - $width / 2), 4, $color->getColor($this->img));
+//			imageline($this->img, $x1, $y1, $x2, $y2, $color->getColor($this->img));
+		}
+	}
+?>
diff --git a/src/libchart/classes/Text.php b/src/libchart/classes/Text.php
new file mode 100644
index 0000000..7f7177c
--- /dev/null
+++ b/src/libchart/classes/Text.php
@@ -0,0 +1,139 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (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
+	* 
+	*/
+	
+	/**
+	* Text drawing helper
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	*/
+
+	class Text
+	{
+		var $HORIZONTAL_LEFT_ALIGN = 1;		// PHP4 doesn't support class constants
+		var $HORIZONTAL_CENTER_ALIGN = 2;
+		var $HORIZONTAL_RIGHT_ALIGN = 4;
+		var $VERTICAL_TOP_ALIGN = 8;
+		var $VERTICAL_CENTER_ALIGN = 16;
+		var $VERTICAL_BOTTOM_ALIGN = 32;
+
+		/**
+		* Creates a new text drawing helper
+		*
+		* @access	public
+		*/
+		
+		function Text()
+		{
+			// Free low-res fonts based on Bitstream Vera <http://dejavu.sourceforge.net/wiki/>
+
+			$this->fontCondensed = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed.ttf";
+			$this->fontCondensedBold = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed-Bold.ttf";
+		}
+
+		/**
+		* Print text
+		*
+		* @access	public
+		* @param	Image		GD image
+		* @param	integer		text coordinate (x)
+		* @param	integer		text coordinate (y)
+		* @param	Color		text color
+		* @param	string		text value
+		* @param	string		font file name
+		* @param	bitfield	text alignment
+		*/
+		
+		function printText($img, $px, $py, $color, $text, $fontFileName, $align = 0)
+		{
+			if(!($align & $this->HORIZONTAL_CENTER_ALIGN) && !($align & $this->HORIZONTAL_RIGHT_ALIGN))
+				$align |= $this->HORIZONTAL_LEFT_ALIGN;
+
+			if(!($align & $this->VERTICAL_CENTER_ALIGN) && !($align & $this->VERTICAL_BOTTOM_ALIGN))
+				$align |= $this->VERTICAL_TOP_ALIGN;
+
+			$fontSize = 8;
+			$lineSpacing = 1;
+
+ 			list($llx, $lly, $lrx, $lry, $urx, $ury, $ulx, $uly) = imageftbbox($fontSize, 0, $fontFileName, $text, array("linespacing" => $lineSpacing));
+
+			$textWidth = $lrx - $llx;
+			$textHeight = $lry - $ury;
+
+			$angle = 0;
+
+			if($align & $this->HORIZONTAL_CENTER_ALIGN)
+				$px -= $textWidth / 2;
+
+			if($align & $this->HORIZONTAL_RIGHT_ALIGN)
+				$px -= $textWidth;
+
+			if($align & $this->VERTICAL_CENTER_ALIGN)
+				$py += $textHeight / 2;
+
+			if($align & $this->VERTICAL_TOP_ALIGN)
+				$py += $textHeight;
+
+			imagettftext($img, $fontSize, $angle, $px, $py, $color->getColor($img), $fontFileName, $text);
+		}
+		
+		/**
+		* Print text centered horizontally on the image
+		*
+		* @access	public
+		* @param	Image		GD image
+		* @param	integer		text coordinate (y)
+		* @param	Color		text color
+		* @param	string		text value
+		* @param	string		font file name
+		*/
+		
+		function printCentered($img, $py, $color, $text, $fontFileName)
+		{
+			$this->printText($img, imagesx($img) / 2, $py, $color, $text, $fontFileName, $this->HORIZONTAL_CENTER_ALIGN | $this->VERTICAL_CENTER_ALIGN);
+		}
+
+		/**
+		* Print text in diagonal
+		*
+		* @access	public
+		* @param	Image		GD image
+		* @param	integer		text coordinate (x)
+		* @param	integer		text coordinate (y)
+		* @param	Color		text color
+		* @param	string		text value
+		*/
+		
+		function printDiagonal($img, $px, $py, $color, $text)
+		{
+			$fontSize = 8;
+			$fontFileName = $this->fontCondensed;
+
+			$lineSpacing = 1;
+
+ 			list($lx, $ly, $rx, $ry) = imageftbbox($fontSize, 0, $fontFileName, $text, array("linespacing" => $lineSpacing));
+			$textWidth = $rx - $lx;
+
+			$angle = -45;
+
+			imagettftext($img, $fontSize, $angle, $px, $py, $color->getColor($img), $fontFileName, $text);
+		}
+	}
+?>
diff --git a/src/libchart/classes/VerticalChart.php b/src/libchart/classes/VerticalChart.php
new file mode 100644
index 0000000..cdb4117
--- /dev/null
+++ b/src/libchart/classes/VerticalChart.php
@@ -0,0 +1,169 @@
+<?php
+	/** Libchart - PHP chart library
+	*	
+	* Copyright (C) 2005-2006 Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	* 	
+	* This library is free software; you can redistribute it and/or
+	* modify it under the terms of the GNU Lesser General Public
+	* License as published by the Free Software Foundation; either
+	* version 2.1 of the License, or (at your option) any later version.
+	* 
+	* This library is distributed in the hope that it will be useful,
+	* but WITHOUT ANY WARRANTY; without even the implied warranty of
+	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+	* Lesser General Public License for more details.
+	* 
+	* You should have received a copy of the GNU Lesser General Public
+	* License along with this library; if not, write to the Free Software
+	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+	* 
+	*/
+	
+	/**
+	* Vertical bar chart
+	*
+	* @author   Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
+	*/
+
+	class VerticalChart extends BarChart
+	{
+		/**
+		* Creates a new vertical bar chart
+		*
+		* @access	public
+    		* @param	integer		width of the image
+    		* @param	integer		height of the image
+		*/
+		
+		function VerticalChart($width = 600, $height = 250)
+		{
+			parent::BarChart($width, $height);
+
+			$this->setLabelMarginLeft(50);
+			$this->setLabelMarginRight(30);
+			$this->setLabelMarginTop(40);
+			$this->setLabelMarginBottom(50);
+		}
+
+		/**
+		* Print the axis
+		*
+		* @access	private
+		*/
+		
+		function printAxis()
+		{
+			// Check if some points were defined
+			
+			if(!$this->sampleCount)
+				return;
+			
+			$minValue = $this->axis->getLowerBoundary();
+			$maxValue = $this->axis->getUpperBoundary();
+			$stepValue = $this->axis->getTics();
+
+			// Vertical axis
+
+			for($value = $minValue; $value <= $maxValue; $value += $stepValue)
+			{
+				$y = $this->graphBRY - ($value - $minValue) * ($this->graphBRY - $this->graphTLY) / ($this->axis->displayDelta);
+
+				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));
+
+				$this->text->printText($this->img, $this->graphTLX - 5, $y, $this->textColor, $value, $this->text->fontCondensed, $this->text->HORIZONTAL_RIGHT_ALIGN | $this->text->VERTICAL_CENTER_ALIGN);
+			}
+
+			// Horizontal Axis
+
+			$columnWidth = ($this->graphBRX - $this->graphTLX) / $this->sampleCount;
+
+			reset($this->point);
+
+			for($i = 0; $i <= $this->sampleCount; $i++)
+			{
+				$x = $this->graphTLX + $i * $columnWidth;
+
+				imagerectangle($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));
+
+				if($i < $this->sampleCount)
+				{
+					$point = current($this->point);
+					next($this->point);
+	
+					$text = $point->getX();
+
+					$this->text->printDiagonal($this->img, $x + $columnWidth * 1 / 3, $this->graphBRY + 10, $this->textColor, $text);
+				}
+			}
+		}
+
+		/**
+		* Print the bars
+		*
+		* @access	private
+		*/
+
+		function printBar()
+		{
+			// Check if some points were defined
+			
+			if(!$this->sampleCount)
+				return;
+			
+			reset($this->point);
+
+			$minValue = $this->axis->getLowerBoundary();
+			$maxValue = $this->axis->getUpperBoundary();
+			$stepValue = $this->axis->getTics();
+
+			$columnWidth = ($this->graphBRX - $this->graphTLX) / $this->sampleCount;
+
+			for($i = 0; $i < $this->sampleCount; $i++)
+			{
+				$x = $this->graphTLX + $i * ($this->graphBRX - $this->graphTLX) / $this->sampleCount;
+
+				$point = current($this->point);
+				next($this->point);
+
+				$value = $point->getY();
+				
+				$ymin = $this->graphBRY - ($value - $minValue) * ($this->graphBRY - $this->graphTLY) / ($this->axis->displayDelta);
+
+				$this->text->printText($this->img, $x + $columnWidth / 2, $ymin - 5, $this->textColor, $value, $this->text->fontCondensed, $this->text->HORIZONTAL_CENTER_ALIGN | $this->text->VERTICAL_BOTTOM_ALIGN);
+
+				// Vertical bar
+
+				$x1 = $x + $columnWidth * 1 / 5;
+				$x2 = $x + $columnWidth * 4 / 5;
+
+				imagefilledrectangle($this->img, $x1, $ymin, $x2, $this->graphBRY - 1, $this->barColor2->getColor($this->img));
+				imagefilledrectangle($this->img, $x1 + 1, $ymin + 1, $x2 - 4, $this->graphBRY - 1, $this->barColor1->getColor($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);
+		}
+	}
+?>