/**
* creates pie chart of given data
* @param int $ex excentricity (width)
* @param array $data data input
* @param array $dnames data field names
* @param array $dcolors colros of data fields
*
*/
public function pieChart($data, $dnames, $colors, $addPercent = null, $width = null, $padding = null)
{
$this->colors = $colors;
$this->dataN = $dnames;
$this->data = $data;
if ($addPercent == "true") {
$addPercent = true;
} else {
$addPercent = false;
}
if (isset($width)) {
$this->width = $width;
} else {
$this->width = 200;
}
if (isset($padding)) {
$this->padding = $padding;
} else {
$this->padding = 10;
}
// 100 % = how much?
$valueSum = array_sum($this->data);
$converted = array();
$convertedDeg = array();
$convertedArc = array();
$radius = $this->width / 2;
$center = $radius;
// INIT Image
parent::Init($this->width, $this->width, "bars");
// whats the percentual contingent of each dataPart?
foreach ($data as $dataPart) {
$procentual = round($dataPart * (100 / $valueSum), 2);
$converted[] = $procentual;
}
// 100% of circles' degress = 360;
$degSum = 360;
$degDone = 0;
// used space should be skipped
$last = 0;
foreach ($converted as $dataPart) {
$deg = $dataPart * ($degSum / 100);
$deg += $degDone;
$fdeg = $last + ($deg - $last) / 2;
$xy = self::getXYbogen($deg, $radius, $this->width);
$fxy = self::getXYbogen($fdeg, $radius / 2, $this->width);
$fontDeg[] = $fxy;
$convertedDeg[] = $xy;
$degDone = $deg;
$last = $deg;
}
parent::imgFill("white", 1, 1);
parent::imgEllipse($center, $center, $this->width, $this->width, "black");
foreach ($convertedDeg as $xy) {
parent::imgLine($center, $center, $xy[0], $xy[1], "black");
}
$i = 0;
foreach ($fontDeg as $field) {
$fontxy = $fontDeg[$i];
if (isset($this->colors) && isset($this->colors[$i])) {
$c = $this->colors[$i];
parent::imgFill($c, $fontxy[0], $fontxy[1], "black");
}
$i++;
}
$i = 0;
foreach ($fontDeg as $field) {
$txt = $dnames[$i];
if ($addPercent) {
$txt .= " (" . $converted[$i] . "%)";
}
$fontxy = $fontDeg[$i];
$hpl = imagefontheight(2) / 2;
$wpl = imagefontwidth(2) * (strlen($txt) / 2);
@parent::imgString(2, $fontxy[0] - $wpl, $fontxy[1] - $hpl, $txt, "black");
$i++;
}
if (isset($this->padding)) {
parent::Init($this->width + $this->padding, $this->width + $this->padding, "container");
parent::imgFill("white", 1, 1);
parent::mergeHandles("container", "bars", $this->padding / 2, $this->padding / 2);
parent::switchHandle("container");
$center = ($this->width + $this->padding) / 2;
parent::imgEllipse($center, $center, $this->width, $this->width, "black");
}
}
