Dodit Suprianto

<?php
/**
 * @author Dodit Suprianto
 * Email: d0dit@yahoo.com
 * Website: http://www.meozit.com, http://doditsuprianto.com
 *
 * File name: pieChart.class.php
 *
 * Description:
 * Custom pie chart is a class to generate your own pie chart. Easy to use and very simple.
 * You don't need to configure very much. Just set a canvas area, set a value and description for an each pie slice,
 * of course you should add other slices as you like. This pie chart will calculate and generate automatically for you.
 * If need it you can also change the font style, color background and font color.
 * This pie chart could be bind with your data for present a static data such as vooting, data visitor, and other purpose.
 *
 */

class pieChart
{
	private $canvasWidth;
	private $canvasHeight;
	private $tickness;
	private $color = array();
	private $image;
	private $degree = array();
	private $value = array();
	private $description = array();
	private $font;
	private $fontcolor;
	private $bgcolor;
	private $bgR;
	private $bgG;
	private $bgB;
	private $fontR;
	private $fontG;
	private $fontB;
	private $title = array();

	public function __construct($canvasWidth, $canvasHeight, $tickness)
	{
		$this->canvasWidth = $canvasWidth;
		$this->canvasHeight = $canvasHeight;
		$this->image = imagecreatetruecolor($this->canvasWidth, $this->canvasHeight);
		$this->tickness = $tickness;
	}

	public function setTitle($title)
	{
		$this->title[] = $title;
	}

	public function setFontColor($fontcolor)
	{
		if ($fontcolor)
		{
			$this->fontcolor = imagecolorallocate($this->image, hexdec(substr(trim($fontcolor),1,2)), hexdec(substr(trim($fontcolor),3,2)), hexdec(substr(trim($fontcolor),5,2)));
		} else {$this->fontcolor = imagecolorallocate($this->image, 0, 0, 0);}
	}

	public function setBGColor($bgcolor)
	{
		if ($bgcolor)
		{
			$this->bgR = hexdec(substr(trim($bgcolor), 1, 2));
			$this->bgG = hexdec(substr(trim($bgcolor), 3, 2));
			$this->bgB = hexdec(substr(trim($bgcolor), 5, 2));
			$this->bgcolor = imagecolorallocate($this->image, hexdec(substr(trim($bgcolor),1,2)), hexdec(substr(trim($bgcolor),3,2)), hexdec(substr(trim($bgcolor),5,2)));
		} else {$this->bgcolor = imagecolorallocate($this->image, 0, 0, 0);}
	}

	public function setFont($font)
	{
		$this->font = $font;
	}

	public function Tickness($tickness)
	{
		$this->tickness = $tickness;
	}

	private function pieSlice()
	{
		$total = 0;
		for ($i=0; $i < count($this->value); $i++)
		{
			$total += $this->value[$i];
		}

		for ($i=0; $i < count($this->value); $i++)
		{
			$this->degree[$i] = $this->value[$i] / $total * 360;
			$R = mt_rand(25,250);
			$G = mt_rand(25,250);
			$B = mt_rand(25,250);
			$this->color["light"][$i] = imagecolorallocate($this->image, $R, $G, $B);
			$this->color["dark"][$i] = imagecolorallocate($this->image, $R - 20, $G - 20, $B - 20);
		}
	}

	public function setValue($description, $value)
	{
		$this->value[] = $value;
		$this->description[] = $description;
	}

	public function showPie()
	{
		imagefill($this->image, 0, 0, imagecolorallocate($this->image, $this->bgR, $this->bgG, $this->bgB));

		$pieX = ceil($this->canvasWidth / 2);
		$pieY = ceil($this->canvasHeight / 2) - 60;

		$this->pieSlice();		

		for ($i = $this->tickness + $pieY; $i > $pieY; $i--)
		{
			$start = 0;
			for ($iterate=0; $iterate < count($this->value); $iterate++)
			{
				imagefilledarc($this->image, $pieX, $i, $this->canvasWidth - 50, ($this->canvasWidth - 50)/2, $start, $start + $this->degree[$iterate], $this->color["dark"][$iterate], IMG_ARC_PIE);
			  	$start += $this->degree[$iterate];
			}
		}

		$start = 0;
		$x1 = 20;
		$y1 = 0 + $this->canvasHeight * 2 / 3;
		$x2 = 30;
		$y2 = 10 + $this->canvasHeight * 2 / 3;

		for ($iterate=0; $iterate < count($this->value); $iterate++)
		{
			imagefilledarc($this->image, $pieX, $pieY, $this->canvasWidth - 50, ($this->canvasWidth - 50)/2, $start, $start + $this->degree[$iterate], $this->color["light"][$iterate], IMG_ARC_PIE);
			imagefilledrectangle($this->image, $x1, $y1, $x2, $y2, $this->color["light"][$iterate]);
			imagettftext($this->image, 9, 0, $x2 + 5, $y2, $this->fontcolor, $this->font, $this->description[$iterate] . " = " . $this->value[$iterate]);
			$start += $this->degree[$iterate];
			$y1 += 15;
			$y2 += 15;
		}

		$py = 30;
		for ($i=0; $i<count($this->title); $i++)
		{
			$textbox = imagettfbbox(12, 0, $this->font, $this->title[$i]);
			$px = ($this->canvasWidth - $textbox[4])/2;
			$py = 30 + $i * 30;

			imagettftext($this->image, 12, 0, $px, $py, $this->fontcolor, $this->font, $this->title[$i]);
		}

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

$img = new pieChart(300, 430, 26);
$img->setFont("lsans.ttf");
$img->setValue("http://www.doditsuprianto.com", 56);
$img->setValue("http://www.meozit.com", 100);
$img->setValue("http://www.goiklan.com", 78);
$img->setValue("http://www.phpclasses.org", 190);
$img->setValue("http://www.hotscripts.com",120);
$img->setValue("http://www.google.com", 45);
$img->setBGColor("#001122");
$img->setFontColor("#FFFFFF");
$img->setTitle("FIRST TITLE ON THE FIRST LINE");
$img->setTitle("SECOND TITLE ON THE SECOND LINE");
$img->showPie();
?>

 
<html>

<head>
<title>Custom Pie Chart</title>
</head>

<body>

<table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="100%" id="AutoNumber1" height="295">
  <tr>
    <td width="100%" height="295">
    <p align="center"><img src=pieChart.class.php></td>
  </tr>
</table>

</body>

</html>