Mike‘s Heimseite

<?php 
/*
Klasse balken     Darstellung einer Balkengrafik.
--------------------------------------------------------------------------------------------------                                           
*/
class balken
{
 public $bild;
 public $breite;
 public $hoehe;
 public $tsize = 24;
 public $maxhoehe = 100;
 public $randoben = 40;
 public $fusshoehe = 40;
 public $randlinks = 100;
 public $randrechts = 50;
 public $schrittweite = 10;
 public $ybereich;
 public $ytext;
 //Farben
 public $black;
 public function __construct($b,$h,$f) {
  $f = $this->farbe($f);
  $this->breite = $b;
  $this->hoehe  = $h;
  $this->bild = imagecreatetruecolor($b,$h);
  $rgb = $this->html2rgb($f);
  $hintergrund=imagecolorallocate ( $this->bild, $rgb[0], $rgb[1], $rgb[2] );
  imagefill($this->bild,0,0,$hintergrund);
  $this->black = imagecolorallocate ( $this->bild, 0, 0, 0 );
  imagerectangle ( $this->bild, 0, 0, $b-1, $h-1, $this->black );  
 }
 public function farbe($farbe) {
   $farben = array(
    'black'   =>  '#000000', 
    'maroon'  =>  '#800000', 
    'green'   =>  '#008000', 
    'olive'   =>  '#808000',
    'navy'    =>  '#000080', 
    'purple'  =>  '#800080', 
    'teal'    =>  '#008080', 
    'silver'  =>  '#C0C0C0', 
    'gray'    =>  '#808080', 
    'red'     =>  '#FF0000',
    'lime'    =>  '#00FF00',
    'yellow'  =>  '#FFFF00', 
    'blue'    =>  '#0000FF',
    'fuchsia' =>  '#FF00FF', 
    'aqua'    =>  '#00FFFF',
    'white'   =>  '#FFFFFF');
    if ( array_key_exists ( $farbe, $farben ) )
     return($farben[$farbe]);
    else
     return($farbe);
}
 public function anzeigen() {
 
  imagepng($this->bild);
  
 }
 public function speichern($datei) {
 
  imagepng($this->bild,$datei);
  
 }
 public function titel($text,$farbe) {
  $farbe = $this->farbe($farbe);
  $text = utf8_decode($text);
  $rgb = $this->html2rgb($farbe);
  $font_c = imagecolorallocate ( $this->bild, $rgb[0], $rgb[1], $rgb[2] );
  $textwerte = imagettfbbox ( $this->tsize, 0, 'arialbd.ttf', $text );
  $x = ($this->breite / 2) - ($textwerte[2] / 2);
  $y = abs($textwerte[5])+ (abs($textwerte[5]) / 2); 
  $this->randoben = $y + abs($textwerte[1])+10;
  imagettftext ($this->bild, $this->tsize, 0, $x, $y, $font_c, 'arialbd.ttf',$text);
 }
 public function drawbalken($x,$y,$b,$h,$farbe) {
  $farbe = $this->farbe($farbe);
  $rgb = $this->html2rgb($farbe);
  $farbe_b = imagecolorallocate ( $this->bild, $rgb[0], $rgb[1], $rgb[2] );
  $h = $this->hoehe - $h - $y;
  $y = $this->hoehe - $y;
  $b = $x + $b;
  imagefilledrectangle ( $this->bild, $x, $y, $b, $h, $farbe_b );  
  imagerectangle ( $this->bild, $x, $y, $b, $h, $this->black );  
 }
 public function beschriftung_y($y,$wert) {
   imageline($this->bild,$this->randlinks-5,$y,$this->breite-$this->randrechts,$y,$this->black);
   $textbreite = imagefontwidth ( 4 ) * strlen ( $wert );
   $x  = $this->randlinks -  $textbreite - 10;
   imagestring ( $this->bild,4,$x,$y-8, $wert, $this->black );
 }
 public function balkengrafik($array,$farbe) {
  $farbe = $this->farbe($farbe);
  $anzahl = count($array);
  $ebreite = round(($this->breite - $this->randlinks - $this->randrechts)  / (3 * $anzahl),0);
  $x2 = $ebreite + $this->randlinks;
  $y2 = $this->hoehe + $this->randoben - ($this->maxhoehe * ($this->hoehe) / $this->maxhoehe);
  $textbreite2 = imagefontwidth ( 4 ) * strlen ( $this->ytext );
  $pos = $this->hoehe /2 + $textbreite2 /2;
  imagestringup ( $this->bild, 4,10, $pos, $this->ytext, $this->black );
  $this->ybereich = round($this->hoehe-$this->fusshoehe - $y2,0);
  $this->beschriftung_y($y2,$this->maxhoehe);
  $s = $this->maxhoehe-$this->schrittweite;
  $s2 = 0;
  $y3 = $y2 + ($this->ybereich / $this->maxhoehe * $this->schrittweite);
  while ( $s > 0) {
   $this->beschriftung_y($y3,$s);
   $s = $s - $this->schrittweite;
   $y3 = $y3 + ($this->ybereich / $this->maxhoehe * $this->schrittweite);
  }
  for($i=0;$i < $anzahl;$i++) {
   $x = $i+1;
   $oy = $array[$i][1];
   $y = $oy * ($this->hoehe - $this->fusshoehe-$this->randoben) / $this->maxhoehe;
   $this->drawbalken($x2,$this->fusshoehe,$ebreite,$y,$farbe);
   $x2 = $x2 + 3 * $ebreite;
  }
  // Linie für die X-Achse
  $this->beschriftung_y($this->hoehe-$this->fusshoehe,'0');
  // Linie für die Y-Achse
  imageline($this->bild,$this->randlinks,$this->hoehe-$this->fusshoehe+5,$this->randlinks,$y2,$this->black);
 }
  public function beschriftung_x($array) {
    $anzahl = count($array);
    $ebreite = round(($this->breite - $this->randlinks - $this->randrechts) / (3 * $anzahl),0);
    $x2 = $ebreite + $this->randlinks;    $x3 = $ebreite + $this->randlinks;
    for($i=0;$i < $anzahl;$i++) {
       $black = imagecolorallocate ( $this->bild, 0, 0, 0 );
       $text = utf8_decode($array[$i][0]);
       $textbreite = imagefontwidth ( 4 ) * strlen ( $text ); 
      // $x2 = $x2 - ($textbreite / 2);
       $y = $this->hoehe - $this->fusshoehe + 10;
       $x3 = $x3 +  ($ebreite/2) - ($textbreite / 2);
       imagestring ( $this->bild,4,$x3,$y, $text, $black );
       $x2 = $x2 + 3 * $ebreite;
       $x3 = $x2 ;
    }
  }
 public function html2rgb($color)
   {
    if ($color[0] == '#')
        $color = substr($color, 1);
    if (strlen($color) == 6)
        list($r, $g, $b) = array($color[0].$color[1],
                                 $color[2].$color[3],
                                 $color[4].$color[5]);
    elseif (strlen($color) == 3)
        list($r, $g, $b) = array($color[0].$color[0], $color[1].$color[1], $color[2].$color[2]);
    else
        return false;
    $r = hexdec($r); $g = hexdec($g); $b = hexdec($b);
    return array($r, $g, $b);
 }
 public function __destruct() {     
  imagedestroy($this->bild);
 }
}

?>

<?php
include('balken.php');
$datei = 'balken.txt';
$fp = fopen ( $datei, 'r' );
while ( ! feof ( $fp ) )
{
  $str = fgetcsv ( $fp, 200, ';' );
  list($a,$b) = $str;
  $a = iconv('UTF-8', 'ISO-8859-1//IGNORE', $a);
  $a = utf8_encode($a);
  $grafik[] = array($a, $b);
}
fclose ( $fp );
$bild = new balken(950,450,'olive');
$bild->maxhoehe = 120;
$bild->schrittweite = 20;
$bild->tsize = 24;
$bild->randrechts = 50;
$bild->ytext = 'Auslastung in %';
$bild->titel('Meine erste Balkengrafik','yellow');
$bild->balkengrafik($grafik,'red');
$bild->beschriftung_x($grafik);
header("Content-type:image/png; charset= utf-8");
$bild->anzeigen();
unset($bild);
?>