/**
* This function draw a pseudo-3D pie chart
* @param pData
* @param int X-Position of the Center
* @param int Y-Position of the Center
* @param int Radius of the cake
* @param const int Draw the Labels to the pies? PIE_LABELS, PIE_NOLABEL, PIE_PERCENTAGE, PIE_PERCENATGE_LABEL
* @param bool Enhance colors?
* @param int Skew
* @param int Height of the splices
* @param int Distance between the splices
* @param int number of decimals
* @param ShadowProperties
* @access public
*/
public function drawPieGraph(pData $data, $XPos, $YPos, $Radius = 100, $DrawLabels = PIE_NOLABEL, $EnhanceColors = TRUE, $Skew = 60, $SpliceHeight = 20, $SpliceDistance = 0, $Decimals = 0, ShadowProperties $shadowProperties = null)
{
if ($shadowProperties == null) {
$shadowProperties = ShadowProperties::FromDefaults();
}
/* Validate the Data and DataDescription array */
$this->validateDataDescription("drawPieGraph", $data->getDataDescription(), FALSE);
$this->validateData("drawPieGraph", $data->getData());
/* Determine pie sum */
$Series = 0;
$PieSum = 0;
$rPieSum = 0;
foreach ($data->getDataDescription()->values as $ColName) {
if ($ColName != $data->getDataDescription()->getPosition()) {
$Series++;
$dataArray = $data->getData();
foreach (array_keys($dataArray) as $Key) {
if (isset($dataArray[$Key][$ColName])) {
if ($dataArray[$Key][$ColName] == 0) {
$iValues[] = 0;
$rValues[] = 0;
$iLabels[] = $dataArray[$Key][$data->getDataDescription()->getPosition()];
} else {
$PieSum += $dataArray[$Key][$ColName];
$iValues[] = $dataArray[$Key][$ColName];
$iLabels[] = $dataArray[$Key][$data->getDataDescription()->getPosition()];
$rValues[] = $dataArray[$Key][$ColName];
$rPieSum += $dataArray[$Key][$ColName];
}
}
}
}
}
/* Validate serie */
if ($Series != 1) {
throw new Exception("Pie chart can only accept one serie of data.");
}
/** @todo Proper exception type needed here */
$SpliceDistanceRatio = $SpliceDistance;
$SkewHeight = $Radius * $Skew / 100;
$SpliceRatio = (360 - $SpliceDistanceRatio * count($iValues)) / $PieSum;
$SplicePercent = 100 / $PieSum;
$rSplicePercent = 100 / $rPieSum;
/* Calculate all polygons */
$Angle = 0;
$CDev = 5;
$TopPlots = "";
$BotPlots = "";
$aTopPlots = "";
$aBotPlots = "";
foreach ($iValues as $Key => $Value) {
$XCenterPos = cos(($Angle - $CDev + ($Value * $SpliceRatio + $SpliceDistanceRatio) / 2) * M_PI / 180) * $SpliceDistance + $XPos;
$YCenterPos = sin(($Angle - $CDev + ($Value * $SpliceRatio + $SpliceDistanceRatio) / 2) * M_PI / 180) * $SpliceDistance + $YPos;
$XCenterPos2 = cos(($Angle + $CDev + ($Value * $SpliceRatio + $SpliceDistanceRatio) / 2) * M_PI / 180) * $SpliceDistance + $XPos;
$YCenterPos2 = sin(($Angle + $CDev + ($Value * $SpliceRatio + $SpliceDistanceRatio) / 2) * M_PI / 180) * $SpliceDistance + $YPos;
$TopPlots[$Key][] = round($XCenterPos);
$BotPlots[$Key][] = round($XCenterPos);
$TopPlots[$Key][] = round($YCenterPos);
$BotPlots[$Key][] = round($YCenterPos + $SpliceHeight);
$aTopPlots[$Key][] = $XCenterPos;
$aBotPlots[$Key][] = $XCenterPos;
$aTopPlots[$Key][] = $YCenterPos;
$aBotPlots[$Key][] = $YCenterPos + $SpliceHeight;
/* Process labels position & size */
$Caption = "";
if (!($DrawLabels == PIE_NOLABEL)) {
$TAngle = $Angle + $Value * $SpliceRatio / 2;
if ($DrawLabels == PIE_PERCENTAGE) {
$Caption = round($rValues[$Key] * pow(10, $Decimals) * $rSplicePercent) / pow(10, $Decimals) . "%";
} elseif ($DrawLabels == PIE_LABELS) {
$Caption = $iLabels[$Key];
} elseif ($DrawLabels == PIE_PERCENTAGE_LABEL) {
$Caption = $iLabels[$Key] . "\r\n" . round($Value * pow(10, $Decimals) * $SplicePercent) / pow(10, $Decimals) . "%";
}
$Position = imageftbbox($this->FontSize, 0, $this->FontName, $Caption);
$TextWidth = $Position[2] - $Position[0];
$TextHeight = abs($Position[1]) + abs($Position[3]);
$TX = cos($TAngle * M_PI / 180) * ($Radius + 10) + $XPos;
if ($TAngle > 0 && $TAngle < 180) {
$TY = sin($TAngle * M_PI / 180) * ($SkewHeight + 10) + $YPos + $SpliceHeight + 4;
} else {
$TY = sin($TAngle * M_PI / 180) * ($SkewHeight + 4) + $YPos - $TextHeight / 2;
}
if ($TAngle > 90 && $TAngle < 270) {
$TX = $TX - $TextWidth;
}
$this->canvas->drawText($this->FontSize, 0, new Point($TX, $TY), new Color(70, 70, 70), $this->FontName, $Caption, $shadowProperties);
}
/* Process pie slices */
for ($iAngle = $Angle; $iAngle <= $Angle + $Value * $SpliceRatio; $iAngle = $iAngle + 0.5) {
$TopX = cos($iAngle * M_PI / 180) * $Radius + $XPos;
$TopY = sin($iAngle * M_PI / 180) * $SkewHeight + $YPos;
$TopPlots[$Key][] = round($TopX);
$BotPlots[$Key][] = round($TopX);
$TopPlots[$Key][] = round($TopY);
$BotPlots[$Key][] = round($TopY + $SpliceHeight);
$aTopPlots[$Key][] = $TopX;
$aBotPlots[$Key][] = $TopX;
$aTopPlots[$Key][] = $TopY;
$aBotPlots[$Key][] = $TopY + $SpliceHeight;
}
$TopPlots[$Key][] = round($XCenterPos2);
$BotPlots[$Key][] = round($XCenterPos2);
$TopPlots[$Key][] = round($YCenterPos2);
$BotPlots[$Key][] = round($YCenterPos2 + $SpliceHeight);
$aTopPlots[$Key][] = $XCenterPos2;
$aBotPlots[$Key][] = $XCenterPos2;
$aTopPlots[$Key][] = $YCenterPos2;
$aBotPlots[$Key][] = $YCenterPos2 + $SpliceHeight;
$Angle = $iAngle + $SpliceDistanceRatio;
}
$this->drawPieGraphBottomPolygons($iValues, $BotPlots, $EnhanceColors, $aBotPlots, $shadowProperties);
$this->drawPieGraphLayers($iValues, $TopPlots, $EnhanceColors, $SpliceHeight, $this->palette, $shadowProperties);
$this->drawPieGraphTopPolygons($iValues, $TopPlots, $EnhanceColors, $aTopPlots, $shadowProperties);
}
/**
* Remove shadow option
*/
function clearShadow()
{
$this->shadowProperties = ShadowProperties::FromDefaults();
}