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setSliceColor - define the color of a slice

Because the pie charts are using a variant of the standard pData object structure (all values are given through one serie), it‘s not possible to change a slice color playing with the standard palette options (that can change only series color). All the color parameters are given trough a $Format array. To learn more about this please read the Format array guide.

Calling this function
setSliceColor($SliceID,$Format="");
Where :

SliceID is the ID of the slice you want to change the color (numbering start at 0)
Format is an array containing the color parameters you want to apply.


Customisation array - Tune up your color!

It is possible to customize the slice rendering by playing with this array. Providing a detailled configuration is not mandatory. You‘ll see below a representation of all the customization possible :

The new color can be set with R,G,B.
The transparency factor can be set with Alpha.


Sample script


 /* pChart library inclusions */
 include("../class/pData.class.php");
 include("../class/pDraw.class.php");
 include("../class/pPie.class.php");
 include("../class/pImage.class.php");

 /* Create and populate the pData object */
 $MyData = new pData();   
 $MyData->addPoints(array(40,30,20),"ScoreA");  
 $MyData->setSerieDescription("ScoreA","Application A");

 /* Define the absissa serie */
 $MyData->addPoints(array("A","B","C"),"Labels");
 $MyData->setAbscissa("Labels");

 /* Create the pChart object */
 $myPicture = new pImage(700,230,$MyData);

 /* Draw a solid background */
 $Settings = array("R"=>173, "G"=>152, "B"=>217, "Dash"=>1, "DashR"=>193, "DashG"=>172, "DashB"=>237);
 $myPicture->drawFilledRectangle(0,0,700,230,$Settings);

 /* Draw a gradient overlay */
 $Settings = array("StartR"=>209, "StartG"=>150, "StartB"=>231, "EndR"=>111, "EndG"=>3, "EndB"=>138, "Alpha"=>50);
 $myPicture->drawGradientArea(0,0,700,230,DIRECTION_VERTICAL,$Settings);
 $myPicture->drawGradientArea(0,0,700,20,DIRECTION_VERTICAL,array("StartR"=>0,"StartG"=>0,"StartB"=>0,"EndR"=>50,"EndG"=>50,"EndB"=>50,"Alpha"=>100));

 /* Add a border to the picture */
 $myPicture->drawRectangle(0,0,699,229,array("R"=>0,"G"=>0,"B"=>0));

 /* Write the picture title */ 
 $myPicture->setFontProperties(array("FontName"=>"../fonts/Silkscreen.ttf","FontSize"=>6));
 $myPicture->drawText(10,13,"pPie - Draw 3D pie charts",array("R"=>255,"G"=>255,"B"=>255));

 /* Set the default font properties */ 
 $myPicture->setFontProperties(array("FontName"=>"../fonts/Forgotte.ttf","FontSize"=>10,"R"=>80,"G"=>80,"B"=>80));

 /* Create the pPie object */ 
 $PieChart = new pPie($myPicture,$MyData);

 /* Define the slice color */
 $PieChart->setSliceColor(0,array("R"=>143,"G"=>197,"B"=>0));
 $PieChart->setSliceColor(1,array("R"=>97,"G"=>177,"B"=>63));
 $PieChart->setSliceColor(2,array("R"=>97,"G"=>113,"B"=>63));

 /* Draw a simple pie chart */ 
 $PieChart->draw3DPie(140,125,array("SecondPass"=>FALSE));

 /* Draw an AA pie chart */ 
 $PieChart->draw3DPie(340,125,array("DrawLabels"=>TRUE,"Border"=>TRUE));

 /* Enable shadow computing */ 
 $myPicture->setShadow(TRUE,array("X"=>3,"Y"=>3,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>10));

 /* Draw a splitted pie chart */ 
 $PieChart->draw3DPie(540,125,array("DataGapAngle"=>10,"DataGapRadius"=>6,"Border"=>TRUE));

 /* Write the legend */
 $myPicture->setFontProperties(array("FontName"=>"../fonts/MankSans.ttf","FontSize"=>11));
 $myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>20));
 $myPicture->drawText(140,200,"Single AA pass",array("R"=>0,"G"=>0,"B"=>0,"Align"=>TEXT_ALIGN_TOPMIDDLE));
 $myPicture->drawText(440,200,"Extended AA pass / Splitted",array("R"=>0,"G"=>0,"B"=>0,"Align"=>TEXT_ALIGN_TOPMIDDLE));

 /* Render the picture (choose the best way) */
 $myPicture->autoOutput("pictures/example.draw3DPie.png");
Last updated on 12/09/2010 
by Jean-Damien 
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