Tree Map Layout

[File: phpdemo/treemaplayout.php]
<?php
require_once("../lib/phpchartdir.php");

function createChart($viewer, $chartIndex)
{
    # Random data for the tree map
    $r = new RanSeries(3);
    $data = $r->getSeries(20, 20, 400);

    # Create a Tree Map object of size 300 x 300 pixels
    $c = new TreeMapChart(300, 300);
    $c->setPlotArea(20, 20, 260, 260);

    # Obtain the root of the tree map, which is the entire plot area
    $root = $c->getRootNode();

    # Add first level nodes to the root.
    $root->setData($data);

    if ($chartIndex == 0) {
        # Squarity - Layout the cells so that they are as square as possible.
        $c->addTitle("Squarify");
        $root->setLayoutMethod(TreeMapSquarify);
    } else if ($chartIndex == 1) {
        # Strip layout - Cells flow from left to right, top to bottom. The number of cells in each
        # row is such that they will be as close to a square as possible. (The setLayoutMethod also
        # supports other flow directions.)
        $c->addTitle("Strip");
        $root->setLayoutMethod(TreeMapStrip);
    } else if ($chartIndex == 2) {
        # Binary Split by Size - Split the cells into left/right groups so that their size are as
        # close as possible. For each group, split the cells into top/bottom groups using the same
        # criteria. Continue until each group contains one cell. (The setLayoutMethod also supports
        # other flow directions.)
        $c->addTitle("Binary Split by Size");
        $root->setLayoutMethod(TreeMapBinaryBySize);
    } else if ($chartIndex == 3) {
        # Binary Split by Count - Same as "Binary Split by Size", except that the cell count
        # (instead of the size) is used to split the cells.
        $c->addTitle("Binary Split by Count");
        $root->setLayoutMethod(TreeMapBinaryByCount);
    } else if ($chartIndex == 4) {
        # Binary Split by Size (Sorted) - Same as "Binary Split by Size" except the cells are sorted
        # first.
        $c->addTitle("Binary Split by Size (Sorted)");
        $root->setSorting(-1);
        $root->setLayoutMethod(TreeMapBinaryBySize);
    }

    # Get the prototype (template) for the first level nodes.
    $nodeConfig = $c->getLevelPrototype(1);

    # Set the label format for the nodes to show the label and value with 8pt Arial Bold font in
    # black color (000000) and center aligned in the node.
    $nodeConfig->setLabelFormat("{index}", "Arial", 8, 0x000000, Center);

    # Set automatic fill color and white (ffffff) border
    $nodeConfig->setColors(DataColor, 0xffffff);

    # Output the chart
    $viewer->setChart($c, SVG);

    # Include tool tip for the chart
    $viewer->setImageMap($c->getHTMLImageMap("", "",
        "title='<*cdml*><*b*>[{index}]<*/b*> {value|2}'"));
}

# This example includes 5 charts
$viewers = array();
for ($i = 0; $i < 5; ++$i) {
    $viewers[$i] = new WebChartViewer("chart$i");
    createChart($viewers[$i], $i);
}
?>

<!DOCTYPE html>
<html>
<head>
    <title>Tree Map Layout</title>
    <!-- Include ChartDirector Javascript Library to support chart interactions -->
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        Tree Map Layout
    </div>
    <hr style="border:solid 1px #000080; background:#000080" />
    <div style="font:10pt verdana; margin-bottom:1.5em">
        <a href="viewsource.php?file=<?=basename(__FILE__)?>">View Chart Source Code</a>
    </div>
    <!-- ****** Here are the chart images ****** -->
    <?php
        for ($i = 0; $i < count($viewers); ++$i) {
            echo $viewers[$i]->renderHTML(), " ";
        }
    ?>
</body>
</html>