SlatePermutate Files · inc/class.graph.php

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binki

Fix qTips not appearing for certain courses because of partial XML underquoting.

Some courses which had ampersands in their titles would cause XML parsing errors in
the browser when trying to display the qTip, resulting in the qTip not showing
for those courses. This is because the qTip’s content is inserted as XHTML into
the document, so it needs to be doubly encoded.

<?php /* -*- mode: php; -*- */

class barGraph {

// This array of values is just here for the example.
private $values = array();
private $image = null;

// Pass me a multidimensional array with 'count', the size, and 'label', the label
public function __construct($userVals, $width=600, $height=300) {

  $this->values = $userVals;


  // Get the total number of columns we are going to plot
  $columns  = count($this->values);
  if($columns == 0) {
    throw new Exception("No input data!");
  }
  if($width < 5 || $height < 5) {
    throw new Exception("Image size too small!");
  }

  // Set the amount of space between each column
  $padding = 5; 

  // Get the width of 1 column
  $column_width = $width / $columns ;

  // Generate the image variables
  $im        = imagecreate($width,$height);
  $gray      = imagecolorallocate ($im,0xcc,0xcc,0xcc);
  $gray_lite = imagecolorallocate ($im,0xee,0xee,0xee);
  $gray_dark = imagecolorallocate ($im,0x7f,0x7f,0x7f);
  $white     = imagecolorallocate ($im,0xff,0xff,0xff);
  $black     = imagecolorallocate($im, 0, 0, 0);
    
  // Fill in the background of the image
  imagefilledrectangle($im,0,0,$width,$height,$white);
    
  $maxv = 0;

  // Calculate the maximum value we are going to plot
  for($i=0;$i<$columns;$i++)
    $maxv = max($this->values[$i]['count'], $maxv);

  // Now plot each column 
  for($i=0;$i<$columns;$i++) {
    $column_height = ($height / 100) * (( $this->values[$i]['count'] / $maxv) *100);
    $x1 = $i*$column_width;
    $y1 = $height-$column_height;
    $x2 = (($i+1)*$column_width)-$padding;
    $y2 = $height;

    imagefilledrectangle($im,$x1,$y1,$x2,$y2,$gray);

    $label = $this->values[$i]['label'];
    $font = '/usr/share/fonts/liberation/LiberationSans-Regular.ttf';
    $font2 = '/usr/share/fonts/liberation/LiberationSans-Bold.ttf';

    imagettftext($im, 10, 0, $x1 + ($column_width / 2) - 20, $height - 5, $black, $font, $label);
    imagettftext($im, 7, 0, $x1 + ($column_width / 2) - 7, $height - 20, $gray_dark, $font, $this->values[$i]['count']);
 
  }
  imagettftext($im, 10, 0, 0, 10, $black, $font2, "Past Month:");

  // Send the PNG header information. Replace for JPEG or GIF or whatever
  $this->image = $im;

  header ("Content-type: image/png");
  imagepng($this->image);
}

}

?>