<?php
     /**
     *   
     * creates a horizontal progress bar
     *
     * @author      Harold Kim E. Cantil
     * @copyright   Kim (c) 2007 - 2008
     * @version     $1.0$
     * @package     none
     * @subpackage  none
     */
    class ProgressBar extends Bar{




      /**
        *
        * class constructor
        *
        * @return   none
        * @access   public
        * @param    $width (int) progress bar's width
        */
        function ProgressBar( $width ){
            $this->setWidth( $width );
            $this->name = substr( md5 (uniqid ('')) , 0 , 5 );

        }





      /**
        *
        * calculates the current width of the progress bar
        *
        * @access   private
        * @param    $val (int) graphs width
        */
        function calculateWidth( $val ) {
            $partial = ( $val - $this->min ) * ( $this->width );
            $total = ( $this->max - $this->min );
            $width = floor ( $partial / $total  );
            if ( $val <= $this->min) {
                $width = 0;
            }
            if ( $val >= $this->max) {
                $width = $this->width ;
            }
            return $width;

        }






      /**
        *
        * fills the progress bar
        *
        * @access   public
        * @param    $bar (int) graphs current spot
        */
        function plot( $bar ) {

            $fillWidth = $this->calculateWidth( $bar );
            $emptyWidth = $this->width - $fillWidth;
            $percentage = $this->calculatePercent( $bar );

            //print "<br/> $fillWidth";
            //print "<br/> $percentage";

            print "
                <script language='javascript'>
                    fill_".$this->name.".style.width=". $fillWidth .";
                    empty_".$this->name.".style.width=". $emptyWidth .";   
                    document.getElementById('percentage_".$this->name."').innerHTML 
                    = '".$percentage."%';
                </script>";
            flush ();
        }





      /**
        *
        * displays the progress bar 
        *
        * @access   public
        * @param    none
        */
        function display(){

            // creates the progress bar gui
            // initialize bar to zero filling

            print  '
            <table border=0 width="'.$this->width.'" cellspacing="0" cellpadding="1">
                <tr>
                    <td bgcolor="'. $this->borderColor. '" >
                        <table bgcolor="#FFFFFF" border=0 width="100%" 
                        height="'.$this->height.'" cellspacing="0" cellpadding="0" >
                            <tr> 
                                <td width="0%"id=fill_'.$this->name.'  
                                bgcolor="'.$this->fillColor.'"></td>
                                <td width="100%" id=empty_'.$this->name.' 
                                bgcolor="'.$this->emptyColor.'"></td>
                            </tr>
                        </table>
                    </td>                
                </tr>                
            </table>
            <div id="percentage_'.$this->name.'" >0%</div>            
            ';

        }



    }

?>