Linear Zone Meter

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

# The value to display on the meter
$value = 85;

# Create an LinearMeter object of size 210 x 45 pixels, using silver background with a 2 pixel black
# 3D depressed border.
$m = new LinearMeter(210, 45, silverColor(), 0, -2);

# Set the scale region top-left corner at (5, 5), with size of 200 x 20 pixels. The scale labels are
# located on the bottom (implies horizontal meter)
$m->setMeter(5, 5, 200, 20, Bottom);

# Set meter scale from 0 - 100
$m->setScale(0, 100);

# Add a title at the bottom of the meter with a 1 pixel raised 3D border
$m->addTitle2(Bottom, "Battery Level", "Arial Bold", 8)->setBackground(Transparent, -1, 1);

# Set 3 zones of different colors to represent Good/Weak/Bad data ranges
$m->addZone(50, 100, 0x99ff99, "Good");
$m->addZone(20, 50, 0xffff66, "Weak");
$m->addZone(0, 20, 0xffcccc, "Bad");

# Add empty labels (just need the ticks) at 0/20/50/80 as separators for zones
$m->addLabel(0, " ");
$m->addLabel(20, " ");
$m->addLabel(50, " ");
$m->addLabel(100, " ");

# Add a semi-transparent blue (800000ff) pointer at the specified value, using triangular pointer
# shape
$m->addPointer($value, 0x800000ff)->setShape(TriangularPointer);

# Output the chart
$viewer = new WebChartViewer("chart1");
$viewer->setChart($m, SVG);
?>

<!DOCTYPE html>
<html>
<head>
    <title>Linear Zone Meter</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;">
        Linear Zone Meter
    </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 is the chart image ****** -->
    <?php echo $viewer->renderHTML(); ?>
</body>
</html>