File: class.ScaleJPG.inc

<?php
/*
    ScaleJPG ver 1.0.0
    Author: Daniel Kushner
    Email: daniel@websapp.com
    Release: 18 Nov 2001
    Copyright 2001
*/
class ScaleJPG {
    
    var $im;
    var $bgcolor = array(255,255,255);
    var $width = 120;
    var $height = 25;
    var $min = 0;
    var $max = 5;
    var $value = 0;
    var $border = 2;
    var $bar_height = 10;
    var $bar = 'blue_metalic.jpg';
    var $palette = array();
    var $textColor = 'black';
    
    function ScaleJPG($value = 0) {
        $this->createNewImage($value);
    }
    
    function createNewImage($value) {
        $this->setValue($value);
        
        $this->im = ImageCreate($this->width+1, $this->height+1);
        $bgcolor = ImageColorAllocate ($this->im,
                                       $this->bgcolor[0],
                                       $this->bgcolor[1],
                                       $this->bgcolor[2]);
    }
    
    function setValue($value) {
        $this->value = $value;
    }
    
    function createImage() {
        $this->createPalette();
         
        $bar = ImageCreateFromJPEG($this->bar);
        
        // Create the bar
        ImageCopyMerge ($this->im, 
                        $bar, 
                        $this->border, 
                        $this->height - $this->border - $this->bar_height, 
                        0,0,
                        ($this->width - 2 * $this->border) * ($this->value / $this->max), // width on scale
                        $this->bar_height,
                        100);
        
        // Draw white rectangles every tick and their numbers
        $tick_width = ($this->width - 2 * $this->border) / $this->max;
        for($i = $this->border, $tick_count = $this->min; 
            $i <= $this->width - $this->border; 
            $i += $tick_width, $tick_count++) {                
            
            ImageFilledRectangle($this->im, 
                                 $i, 
                                 $this->height - $this->border - $this->bar_height, 
                                 $i, 
                                 $this->height - $this->border, 
                                 $this->palette['white']
                                );
             ImageString($this->im, 
                         1, // Font type
                         $i - $tick_width / 2, 
                         $this->border, 
                         $tick_count, 
                         $this->palette[$this->textColor]
                        );
        }
        
    }
    
    function getImage() {
        $this->createImage();
        return ImageJPEG($this->im);
    }        
    
    function showImage() {
        header ("Content-type: image/jpeg"); 
        echo $this->getImage();
    }
            
    function createPalette() {
        $this->palette['white'] = ImageColorAllocate($this->im, 255, 255, 255);
        $this->palette['black'] = ImageColorAllocate($this->im, 0, 0, 0);
        $this->palette['red'] = ImageColorAllocate($this->im, 255, 0, 0);
        $this->palette['green'] = ImageColorAllocate($this->im, 0, 255, 0);
        $this->palette['blue'] = ImageColorAllocate($this->im, 0, 0, 255);
    } 
    
    function addColor($colorName, $red, $green, $blue) {
        $this->palette[$colorName] = ImageColorAllocate($this->im, $red, $green, $blue);
    }        
               
    
    
}
?>