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diff --git a/boca-1.5.0/src/libchart/classes/Chart.php b/boca-1.5.0/src/libchart/classes/Chart.php
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+<?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));
+		}
+	}
+?>