circularbarmeter.php
Back to Chart Graphics
<![CDATA[
<?php
require_once("../lib/phpchartdir.php");
function createChart($viewer, $chartIndex)
{
# The value to display on the meter
$value = 77;
# The meter radius and angle
$radius = 50;
$angle = $value * 360.0 / 100;
# Create an AngularMeter with transparent background
$m = new AngularMeter($radius * 2 + 10, $radius * 2 + 10, Transparent);
# Set the center, radius and angular range of the meter
$m->setMeter((int)($m->getWidth() / 2), (int)($m->getHeight() / 2), $radius, 0, 360);
# For circular bar meters, we do not need pointer or graduation, so we hide them.
$m->setMeterColors(Transparent, Transparent, Transparent);
$m->setCap(0, Transparent);
#
# This example demonstrates several coloring styles
#
# Thd default fill and blank colors
$fillColor = 0x6699ff;
$blankColor = 0xeeeeee;
if ($chartIndex >= 4) {
# Use dark background style
$m->setColors(whiteOnBlackPalette());
$blankColor = 0x222222;
}
if ($chartIndex % 4 == 1) {
# Alternative fill color
$fillColor = 0xff6600;
} else if ($chartIndex % 4 == 2) {
# Use a smooth color scale as the fill color
$smoothColorScale = array(0, 0x0022ff, 15, 0x0088ff, 30, 0x00ff00, 55, 0xffff00, 80,
0xff0000, 100, 0xff0000);
$fillColor = $m->getDrawArea()->angleGradientColor((int)($m->getWidth() / 2), (int)(
$m->getHeight() / 2), 0, 360, $radius, $radius - 20, $smoothColorScale);
} else if ($chartIndex % 4 == 3) {
# Use a step color scale as the fill color
$stepColorScale = array(0, 0x0044ff, 20, 0x00ee00, 50, 0xeeee00, 70, 0xee0000, 100);
$fillColor = $m->getDrawArea()->angleGradientColor((int)($m->getWidth() / 2), (int)(
$m->getHeight() / 2), 0, 360, $radius, $radius - 20, $stepColorScale);
}
# Draw the blank part of the circular bar
if ($angle < 360) {
$m->addRingSector($radius, $radius - 20, $angle, 360, $blankColor);
}
# Draw the fill part of the circular bar
if ($angle > 0) {
$m->addRingSector($radius, $radius - 20, 0, $angle, $fillColor);
}
# Add a label at the center to display the value
$m->addText((int)($m->getWidth() / 2), (int)($m->getHeight() / 2), $m->formatValue($value,
"{value}"), "Arial", 25, TextColor, Center)->setMargin(0);
# Output the chart
$viewer->setChart($m, SVG);
}
# This example includes 8 charts
$viewers = array();
for ($i = 0; $i < 8; ++$i) {
$viewers[$i] = new WebChartViewer("chart$i");
createChart($viewers[$i], $i);
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Circular Bar Meters</title>
<!-- Include ChartDirector Javascript Library to support chart interactions -->
<script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
<div style="font:bold 18pt verdana;">
Circular Bar Meters
</div>
<hr style="border:solid 1px #000080; background:#000080" />
<div style="font:10pt verdana; margin-bottom:1.5em">
<a href="viewsource.php?file=<?=basename(__FILE__)?>">View Chart Source Code</a>
</div>
<!-- ****** Here are the chart images ****** -->
<?php
for ($i = 0; $i < count($viewers); ++$i) {
echo $viewers[$i]->renderHTML(), " ";
}
?>
</body>
</html>
]]>