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bubbleScale - Correct the chart scale for bubble charts

Require pChart 2.0.13

A the bubble chart add extra boundaries to your charts, the scale must be updated accordingly. Calling this function will fix the chart scale Min / Max so the bubble will never go outside the borders of the charting area.

Calling this function
bubbleScale($DataSeries,$WeightSeries);
Where :

DataSeries is an array containing the name of the serie providing the Y values.
WeightSeries is an array containing the name of the serie providing the Z values.


Sample script #1


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

 /* Create and populate the pData object */
 $MyData = new pData();  
 $MyData->addPoints(array(34,55,15,62,38,42),"Probe1");
 $MyData->addPoints(array(5,10,8,9,15,10),"Probe1Weight");
 $MyData->addPoints(array(5,10,-5,-1,0,-10),"Probe2");
 $MyData->addPoints(array(6,10,14,10,14,6),"Probe2Weight");
 $MyData->setSerieDescription("Probe1","This year");
 $MyData->setSerieDescription("Probe2","Last year");
 $MyData->setAxisName(0,"Current stock");
 $MyData->addPoints(array("Apple","Banana","Orange","Lemon","Peach","Strawberry"),"Product");
 $MyData->setAbscissa("Product");

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

 /* Draw the background */
 $Settings = array("R"=>170, "G"=>183, "B"=>87, "Dash"=>1, "DashR"=>190, "DashG"=>203, "DashB"=>107);
 $myPicture->drawFilledRectangle(0,0,700,230,$Settings);

 /* Overlay with a gradient */
 $Settings = array("StartR"=>219, "StartG"=>231, "StartB"=>139, "EndR"=>1, "EndG"=>138, "EndB"=>68, "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"=>80));

 /* 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,"drawBubbleChart() - draw a linear bubble chart",array("R"=>255,"G"=>255,"B"=>255));

 /* Write the title */
 $myPicture->setFontProperties(array("FontName"=>"../fonts/Forgotte.ttf","FontSize"=>11));
 $myPicture->drawText(40,55,"Current Stock / Needs chart",array("FontSize"=>14,"Align"=>TEXT_ALIGN_BOTTOMLEFT));

 /* Change the default font */
 $myPicture->setFontProperties(array("FontName"=>"../fonts/pf_arma_five.ttf","FontSize"=>6));

 /* Create the Bubble chart object and scale up */
 $myBubbleChart = new pBubble($myPicture,$MyData);

 /* Scale up for the bubble chart */
 $bubbleDataSeries   = array("Probe1","Probe2");
 $bubbleWeightSeries = array("Probe1Weight","Probe2Weight");
 $myBubbleChart->bubbleScale($bubbleDataSeries,$bubbleWeightSeries);

 /* Draw the 1st chart */
 $myPicture->setGraphArea(40,60,430,190);
 $myPicture->drawFilledRectangle(40,60,430,190,array("R"=>255,"G"=>255,"B"=>255,"Surrounding"=>-200,"Alpha"=>10));
 $myPicture->drawScale(array("DrawSubTicks"=>TRUE,"CycleBackground"=>TRUE));
 $myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>30));
 $myBubbleChart->drawBubbleChart($bubbleDataSeries,$bubbleWeightSeries);

 /* Draw the 2nd scale */
 $myPicture->setShadow(FALSE);
 $myPicture->setGraphArea(500,60,670,190);
 $myPicture->drawFilledRectangle(500,60,670,190,array("R"=>255,"G"=>255,"B"=>255,"Surrounding"=>-200,"Alpha"=>10));
 $myPicture->drawScale(array("Pos"=>SCALE_POS_TOPBOTTOM,"DrawSubTicks"=>TRUE));

 /* Draw the 2nd stock chart */
 $myPicture->setShadow(TRUE,array("X"=>1,"Y"=>1,"R"=>0,"G"=>0,"B"=>0,"Alpha"=>30));
 $myBubbleChart->drawbubbleChart($bubbleDataSeries,$bubbleWeightSeries);

 /* Write the chart legend */
 $myPicture->drawLegend(550,215,array("Style"=>LEGEND_NOBORDER,"Mode"=>LEGEND_HORIZONTAL));

 /* Render the picture (choose the best way) */
 $myPicture->autoOutput("pictures/example.drawBubbleChart.png");
Last updated on 01/08/2011 
by Jean-Damien 
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