source: trunk/xgraph/jpgraph/Examples/csim_in_html_graph_ex2.php

<?php // content="text/plain; charset=utf-8"
// Example of pie with center circle
require_once ('jpgraph/jpgraph.php');
require_once ('jpgraph/jpgraph_pie.php');

// Some data
$data = array(50,28,25,27,31,20);

// A new pie graph
$piegraph = new PieGraph(400,320);

$n = count($data) ; // Number of slices

// No border around graph
$piegraph->SetFrame(false);

// Setup title
$piegraph->title->Set("CSIM Center Pie plot");
$piegraph->title->SetFont(FF_ARIAL,FS_BOLD,18);
$piegraph->title->SetMargin(8); // Add a little bit more margin from the top

// Create the pie plot
$p1 = new PiePlotC($data);

// Set the radius of pie (as fraction of image size)
$p1->SetSize(0.32);

// Label font and color setup
$p1->value->SetFont(FF_ARIAL,FS_BOLD,11);
$p1->value->SetColor('white');

// Setup the title on the center circle
$p1->midtitle->Set("Distribution\n2008 H1");
$p1->midtitle->SetFont(FF_ARIAL,FS_NORMAL,12);

// Set color for mid circle
$p1->SetMidColor('yellow');

// Use percentage values in the legends values (This is also the default)
$p1->SetLabelType(PIE_VALUE_PER);

// The label array values may have printf() formatting in them. The argument to the
// form,at string will be the value of the slice (either the percetage or absolute
// depending on what was specified in the SetLabelType() above.
$lbl = array("Jan\n%.1f%%","Feb\n%.1f%%","March\n%.1f%%",
             "Apr\n%.1f%%","May\n%.1f%%","Jun\n%.1f%%");
$p1->SetLabels($lbl);

// Add drop shadow to slices
$p1->SetShadow();

// Explode all slices 15 pixels
$p1->ExplodeAll(15);

// Setup the CSIM targets
global $_wrapperfilename;
$targ = array(); $alt = array(); $wtarg = array();
for( $i=0; $i <= $n; ++$i ) {
    $urlarg = 'pie_clickedon='.($i+1);
    $targ[] = $_wrapperfilename.'?'.$urlarg;
    $alt[] = 'val=%d';
    $wtarg[] = '';
}
$p1->SetCSIMTargets($targ,$alt,$wtarg);
$p1->SetMidCSIM($targ[0],$alt[0],$wtarg[0]);

// Add plot to pie graph
$piegraph->Add($p1);

// Send back the image when we are called from within the <img> tag
$piegraph->StrokeCSIMImage();

?>