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<?php /** * Class ProgressBar * Easy to use progress bar in html and css. * * @author David Bongard (mail@bongard.net \| www.bongard.net) * @version 1.2 - 20070814 * @license http://www.opensource.org/licenses/mit-license.php MIT License * @copyright Copyright © 2007, David Bongard * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * Example of usage: * <code> * require_once 'ProgressBar.class.php'; * $bar = new ProgressBar(); * * $elements = 100000; //total number of elements to process * $bar->initialize($elements); //print the empty bar * * for($i=0;$i<$elements;$i++){ * //do something here... * $bar->increase(); //calls the bar with every processed element * } * </code> * * Another example: * <code> * require_once 'ProgressBar.class.php'; * $bar = new ProgressBar(); * $bar->setMessage("Let's talk to the user!"); * * $bar->initialize(3); //initialize the bar with the total number of elements to process * * //do something time consuming here... * $bar->increase(); //call for first element * * //do something time consuming here... * $bar->increase(); //call for second element * $bar->setMessage("Tell the user what you are doing!"); * * //do something time consuming here... * $bar->increase(); //call for third element. end of bar... * </code> * * @changes * Version 1.2 * - added method setMessage() to change the message at runtime (JavaScript) * - minor changes in HTML-code * - refactoring: added new setter-methods * * Version 1.1: Use $bar->stop(true) stop the bar instantly at any time. * / defined( '_JEXEC' ) or die( 'Restricted access-class' ); class ProgressBar { /* * Flag for class initialization. * @param bool $initialized true=class initialized / private $initialized; /* * Flag for start of the progress bar. * @started bool $started true=progress bar has been started. / private $started; /* * Flag for the end of the progress bar. * @param bool $finished true=progress bar has reached the end. / private $finished; private $firstStep; /* * Constructor * * @param str $message Message shown above the bar eg. "Please wait...". Default: '' * @param bool $hide Hide the bar after completion (with JavaScript). * Default: false * @param int $sleepOnFinish Seconds to sleep after bar completion. Default: 0 * @param int $barLength Length in pixels. Default: 200 * @param int $precision Desired number of steps to show. Default: 20. Precision will become $numElements when greater than $numElements. $barLength will increase if $precision is greater than $barLength. * @param str $backgroundColor Color of the bar background * @param str $foregroundColor Color of the actual progress-bar * @param str $domID Html-Attribute "id" for the bar * @param str $stepElement Element the bar is build from / function __construct($message='', $hide=false, $sleepOnFinish=0, $barLength=300, $precision=20, $backgroundColor='#cccccc', $foregroundColor='blue', $domID='progressbar', $stepElement='<div style="width:%spx;height:15px;float:left;background-color:%s;"></div>') { global $pb_instance; $this->instance = $pb_instance++; $this->setAutohide($hide); $this->setSleepOnFinish($sleepOnFinish); $this->setDomIDs($domID); $this->setMessage($message); $this->setStepElement($stepElement); $this->setPrecision($precision); $this->setBackgroundColor($backgroundColor); $this->setForegroundColor($foregroundColor); $this->setBarLength($barLength); //Initialization $this->initialized = false; $this->started = false; $this->finished = false; $this->firstStep = null; } /* * Print the empty progress bar * @param int $numElements Number of Elements to be processed and number of times $bar->initialize() will be called while processing / function initialize($numElements) { //increase time limit if allowed /if(!ini_get('safe_mode')){ set_time_limit(0); } / $this->StepCount = 0; $this->CallCount = 0; $numElements = (int) $numElements ; if($numElements == 0){ $numElements = 1; } //calculate the number of calls for one step $this->CallsPerStep = ceil(($numElements/$this->precision)); // eg. 1000/200 = 100 //calculate the total number of steps if($numElements >= $this->CallsPerStep){ $this->numSteps = round($numElements/$this->CallsPerStep); }else{ $this->numSteps = round($numElements); } //calculate the length of one step $this->stepLength = floor($this->barLength/$this->numSteps); // eg. 100/10 = 10 //the rest is the first step $this->rest = $this->barLength-($this->stepLength$this->numSteps); if($this->rest > 0){ $this->firstStep = $this->getStep($this->rest); } //build bar background $backgroundLength = $this->rest+($this->stepLength$this->numSteps); $this->backgroundBar = sprintf($this->stepElement,$backgroundLength,$this->backgroundColor); //stop buffering (only when a buffer is active) if (count(ob_list_handlers()) != 0) { ob_end_flush(); } //start buffering ob_start(); echo '<div id="'.$this->domID.'" style="margin-bottom:0px;" class="progressbar">'. '<span style="display:block" id="'.$this->domIDMessage.'">'.$this->message.'</span>'. '<div style="position:absolute;">'.$this->backgroundBar.'</div>' . '<div style="position:absolute;">'; ob_flush(); flush(); $this->initialized = true; } /* * Count steps and increase bar length * */ function increase() { $this->CallCount++; if(!$this->started){ //rest output echo $this->firstStep; ob_flush(); flush(); } if($this->StepCount < $this->numSteps &&(!$this->started \|\| $this->CallCount == $this->CallsPerStep)){ //add a step echo $this->getStep(); ob_flush(); flush(); $this->StepCount++; $this->CallCount=0; } $this->started = true; if(!$this->finished && $this->StepCount == $this->numSteps){ $this->stop(); } } function stop($error=false) { // close the bar echo '</div></div>'; ob_flush(); flush(); //sleep x seconds before ending the script if(!$error){ if($this->sleepOnFinish > 0){ sleep($this->sleepOnFinish); } //hide the bar if($this->hide){ echo '<script type="text/javascript">document.getElementById("'.$this->domID.'").style.display = "none";</script>'; ob_flush(); flush(); } } $this->finished = true; } function setMessage($text) { if($this->initialized){ echo '<script type="text/javascript">document.getElementById("'.$this->domIDMessage.'").innerHTML = "'.$text.'";</script>'; ob_flush();flush(); }else{ $this->message = $text; } } function setAutohide($hide) { $this->hide = (bool) $hide; } function setSleepOnFinish($sleepOnFinish) { $this->sleepOnFinish = (int) $sleepOnFinish; } function setDomIDs($domID) { $this->domID = strip_tags($domID).$this->instance; $this->domIDMessage = $this->domID.'_message'; } function setStepElement($stepElement) { $this->stepElement = $stepElement; } function setBarLength($barLength) { $this->barLength = (int) $barLength; if($this->barLength < $this->precision){ $this->barLength = $this->precision; } } function setPrecision($precision) { $this->precision = (int) $precision; } function setBackgroundColor($color) { $this->backgroundColor = strip_tags($color); } function setForegroundColor($color) { $this->foregroundColor = strip_tags($color); } function getStep($length=null) { if($length==null){ $length = $this->stepLength; } return sprintf($this->stepElement,$length,$this->foregroundColor); } } ?>

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