roundmeterreadout.php
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<?php
require_once("../lib/phpchartdir.php");
function createChart($viewer, $chartIndex)
{
# The value to display on the meter
$value = 54;
# The main color of the four meters in this example. The other colors and gradients are derived
# from the main color.
$colorList = array(0x0033dd, 0xaaaa00);
$mainColor = $colorList[$chartIndex];
#
# In this example, we demonstrate how to parameterized by size, so that the chart size can be
# changed by changing just one variable.
#
$size = 300;
# The radius of the entire meter, which is size / 2, minus 2 pixels for margin
$outerRadius = (int)($size / 2 - 2);
# The radius of the meter scale
$scaleRadius = (int)($outerRadius * 92 / 100);
# The radius of the color scale
$colorScaleRadius = (int)($scaleRadius * 43 / 100);
# The width of the color scale
$colorScaleWidth = (int)($scaleRadius * 10 / 100);
# Major tick length
$tickLength = (int)($scaleRadius * 10 / 100);
# Major tick width
$tickWidth = (int)($scaleRadius * 1 / 100 + 1);
# Label font size
$fontSize = (int)($scaleRadius * 13 / 100);
# Radius of readout circle as a ratio to the scale radius
$readOutRadiusRatio = 0.333333333333;
# Readout font size
$readOutFontSize = (int)($scaleRadius * 24 / 100);
#
# Create an angular meter based on the above parameters
#
# Create an AngularMeter object of the specified size. In this demo, we use black (0x000000) as
# the background color. You can also use transparent or other colors.
$m = new AngularMeter($size, $size, 0x000000);
# Set the default text and line colors to white (0xffffff)
$m->setColor(TextColor, 0xffffff);
$m->setColor(LineColor, 0xffffff);
# Set meter center and scale radius, and set the scale angle from -180 to +90 degrees
$m->setMeter($size / 2, $size / 2, $scaleRadius, -180, 90);
# Background gradient with the mainColor at the center and become darker near the border
$bgGradient = array(0, $mainColor, 0.5, $m->adjustBrightness($mainColor, 0.75), 1,
$m->adjustBrightness($mainColor, 0.15));
# Fill the meter background with the background gradient
$m->addRing(0, $outerRadius, $m->relativeRadialGradient($bgGradient, $outerRadius * 0.66));
# Gradient for the neon backlight, with the main color at the scale radius fading to transparent
$neonGradient = array(0.89, Transparent, 1, $mainColor, 1.07, Transparent);
$m->addRing((int)($scaleRadius * 85 / 100), $outerRadius, $m->relativeRadialGradient(
$neonGradient));
# The neon ring at the scale radius with width equal to 1/80 of the scale radius, creating using
# a brighter version of the main color
$m->addRing($scaleRadius, (int)($scaleRadius + $scaleRadius / 80), $m->adjustBrightness(
$mainColor, 2));
# Meter scale is 0 - 100, with major/minor/micro ticks every 10/5/1 units
$m->setScale(0, 100, 10, 5, 1);
# Set the scale label style, tick length and tick width. The minor and micro tick lengths are
# 80% and 60% of the major tick length, and their widths are around half of the major tick
# width.
$m->setLabelStyle("Arial Italic", $fontSize);
$m->setTickLength(-$tickLength, -(int)($tickLength * 80 / 100), -(int)($tickLength * 60 / 100));
$m->setLineWidth(0, $tickWidth, (int)(($tickWidth + 1) / 2), (int)(($tickWidth + 1) / 2));
# Demostrate different types of color scales and putting them at different positions.
$smoothColorScale = array(0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xdddd00, 100, 0xff0000);
$highColorScale = array(70, Transparent, 100, 0xff0000);
if ($chartIndex == 0) {
# Add the smooth color scale
$m->addColorScale($smoothColorScale, $colorScaleRadius, $colorScaleWidth);
# Add a red (0xff0000) pointer
$m->addPointer2($value, 0xff0000);
} else {
# Add the high color scale at the default position
$m->addColorScale($highColorScale);
# Add a red (0xff0000) triangular pointer starting from 40% and ending at 60% of scale
# radius, with a width 6 times the default
$m->addPointer2($value, 0xff0000, -1, TriangularPointer2, 0.4, 0.6, 6);
}
# Configure a large "pointer cap" to be used as the readout circle at the center. The cap border
# width is set to 1.5% of the scale radius. The cap color is darker version of the main color.
# The border color is a brighter version of the main color with 75% brightness gradient effect.
$m->setCap2(Transparent, $m->adjustBrightness($mainColor, 0.3), $m->adjustBrightness($mainColor,
1.5), 0.75, 0, $readOutRadiusRatio, 0.015);
# Add value label at the center using a brighter version of the main color and Arial Italic font
$m->addText($size / 2, $size / 2, $m->formatValue($value, "{value|0}"), "Arial Italic",
$readOutFontSize, $m->adjustBrightness($mainColor, 2.5), Center)->setMargin(0);
# Add glare up to the scale radius
$m->addGlare($scaleRadius);
# Output the chart
$viewer->setChart($m, SVG);
}
# This example includes 2 charts
$viewers = array();
for ($i = 0; $i < 2; ++$i) {
$viewers[$i] = new WebChartViewer("chart$i");
createChart($viewers[$i], $i);
}
?>
<!DOCTYPE html>
<html>
<head>
<title>Round Meters with Readout</title>
<!-- Include ChartDirector Javascript Library to support chart interactions -->
<script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
<div style="font:bold 18pt verdana;">
Round Meters with Readout
</div>
<hr style="border:solid 1px #000080; background:#000080" />
<div style="font:10pt verdana; margin-bottom:1.5em">
<a href="viewsource.php?file=<?=basename(__FILE__)?>">View Chart Source Code</a>
</div>
<!-- ****** Here are the chart images ****** -->
<?php
for ($i = 0; $i < count($viewers); ++$i) {
echo $viewers[$i]->renderHTML(), " ";
}
?>
</body>
</html>
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