progress-bar

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  1. progress-bar

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Code (php)
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<?php
class IHG_Progressbar {
    
    protected $bar_id;
    
    protected $max_ticks;
    
    protected $ticks;
    
    protected $label;
    
    public function __construct($max_ticks, $label = '%d van %d') {
        $this->bar_id = uniqid('progressbar');
        $this->label = $label;
        
        $this->max_ticks = $max_ticks;
        $this->ticks = 0;
    }
    
    public function tick() {
        $this->ticks++;
        $this->draw_progress();
    }
    
    public function draw() {
        $this->draw_bar();
        $this->draw_progress();
    }
    
    static public function draw_css() {
        echo '
            <style type="text/css">
            .ihg_progress_bar {
                display: block;
                width: 500px;
                height: 20px;
                border: 1px solid gray;
                padding: 1px;
                
                margin: 30px auto;
                
                position: relative;
            }
            
            .ihg_progress_ticks {
                display: block;
                position: absolute;
                
                background-color: orange;
                width: 0;
                height: 20px;
                overflow: hidden;
            }
            
            .ihg_progress_label_a,
            .ihg_progress_label_b {
                display: block;
                position: absolute;
                
                width: 500px;
                height: 20px;
                text-align: center;
            }
            
            .ihg_progress_label_a {
                color: black;
            }
            
            .ihg_progress_label_b {
                color: white;
            }
            </style>
        ';
    }
    
    protected function draw_bar() {
        echo '
            <div class="ihg_progress_bar">
                <span class="ihg_progress_label_a" id="' . $this->bar_id . '_label_a"></span>
                <div class="ihg_progress_ticks" id="' . $this->bar_id . '">
                    <span class="ihg_progress_label_b" id="' . $this->bar_id . '_label_b"></span>
                </div>
            </div>
        ';
        echo '
            <script type="text/javascript">
            (function() {
                var bar        = document.getElementById("' . $this->bar_id . '");
                var label_a = document.getElementById("' . $this->bar_id . '_label_a");
                var label_b = document.getElementById("' . $this->bar_id . '_label_b");
                
                window["' . $this->bar_id . '"] = function(width, label) {
                    bar.style.width = width + "%";
                    label_a.innerHTML = label;
                    label_b.innerHTML = label;
                }
            })();
            </script>
        ';
        
        $this->flush();
    }
    
    protected function draw_progress() {
        
        $width = round($this->ticks / $this->max_ticks * 100, 2);
        $label = sprintf($this->label, $this->ticks, $this->max_ticks);
        
        echo '
            <script type="text/javascript">
                window["' . $this->bar_id . '"]("' . $width . '", "' . addslashes($label) . '");
            </script>
        
        ';
        $this->flush();
    }
    
    protected function flush() {        
        while(ob_get_level() > 0) {
            ob_end_flush();
        }
        
        flush();
    }
}
?>


Code (php)
PHP script in nieuw venster Selecteer het PHP script
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<?php
IHG_Progressbar::draw_css();

$bar = new IHG_Progressbar(100, '%d van %d rondjes gewandeld');

$bar->draw();

for($i = 0; $i < 100; $i++) {
    usleep(50000);
    $bar->tick();
}
?>

 
 

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