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<title>RGraph: HTML5 Javascript charts library - meter charts</title>
<meta name="keywords" content="rgraph html5 canvas example meter charts" />
<meta name="description" content="RGraph: HTML5 Javascript charts library - Meter charts examples" />
<meta property="og:title" content="RGraph: HTML5 Javascript charts library" />
<meta property="og:description" content="A charts library based on the HTML5 canvas tag" />
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<script src="../libraries/RGraph.meter.js" ></script>
<!--[if IE 8]><script src="../excanvas/excanvas.original.js"></script><![endif]-->
<script>
window.onload = function ()
{
var min = 0;
var max = 100;
var meter1 = new RGraph.Meter('meter1', min, max, RGraph.random(min, max));
var grad1 = meter1.context.createRadialGradient(meter1.canvas.width / 2,meter1.canvas.height - 25,0,meter1.canvas.width / 2,meter1.canvas.height - 25,200);
grad1.addColorStop(0, 'green');
grad1.addColorStop(1, 'white');
var grad2 = meter1.context.createRadialGradient(meter1.canvas.width / 2, meter1.canvas.height - 25,0,meter1.canvas.width / 2, meter1.canvas.height - 25,200);
grad2.addColorStop(0, 'yellow');
grad2.addColorStop(1, 'white');
var grad3 = meter1.context.createRadialGradient(meter1.canvas.width / 2, meter1.canvas.height - 25,0,meter1.canvas.width / 2, meter1.canvas.height - 25,200);
grad3.addColorStop(0, 'red');
grad3.addColorStop(1, 'white');
meter1.Set('chart.labels.position', 'inside');
meter1.Set('chart.title', 'A sample measurement');
meter1.Set('chart.title.vpos', 0.5);
meter1.Set('chart.title.color', 'black');
meter1.Set('chart.green.color', grad1);
meter1.Set('chart.yellow.color', grad2);
meter1.Set('chart.red.color', grad3);
meter1.Set('chart.border', false);
meter1.Set('chart.needle.linewidth', 5);
meter1.Set('chart.needle.tail', true);
meter1.Set('chart.tickmarks.big.num', 0);
meter1.Set('chart.tickmarks.small.num', 0);
meter1.Set('chart.segment.radius.start', 100);
meter1.Set('chart.needle.radius', 80);
meter1.Set('chart.needle.linewidth', 2);
meter1.Set('chart.linewidth.segments', 15);
meter1.Set('chart.strokestyle', 'white');
meter1.Set('chart.text.size', 14);
RGraph.Effects.Meter.Grow(meter1);
//meter1.Draw();
setInterval(function ()
{
meter1.value = RGraph.random(min,max);
RGraph.Effects.Meter.Grow(meter1);
}, 5000)
var meter2 = new RGraph.Meter('meter2', 0, 10, 5);
meter2.Set('chart.units.post', 'kg');
meter2.Set('chart.red.start', 0);
meter2.Set('chart.red.end', 3);
meter2.Set('chart.yellow.start', 3);
meter2.Set('chart.yellow.end', 6);
meter2.Set('chart.green.start', 6);
meter2.Set('chart.green.end', 10);
meter2.Draw();
}
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<h1>RGraph: <span>HTML5 Javascript charts library</span> - Meter charts</h1>
<script>
if (RGraph.isIE8()) {
document.write('<div style="background-color: #fee; border: 2px dashed red; padding: 5px"><b>Important</b><br /><br /> Internet Explorer 8 does not natively support the HTML5 canvas tag, so if you want to see the charts, you can either:<ul><li>Install <a href="http://code.google.com/chrome/chromeframe/">Google Chrome Frame</a></li><li>Use ExCanvas. This is provided in the RGraph Archive.</li><li>Use another browser entirely. Your choices are Firefox 3.5+, Chrome 2+, Safari 4+ or Opera 10.5+. </li></ul> <b>Note:</b> Internet Explorer 9 fully supports the canvas tag.</div>');
}
</script>
<div id="breadcrumb">
<a href="../index.html">RGraph: HTML5 Javascript charts library</a>
>
<a href="./index.html">Examples</a>
>
Meter
</div>
<div>
<p>
Meter charts are similar to Odometer charts albeit only a semi-circle and not a full circle. It can be better when trying illustrate
a particular level, but only have a limited amount of space. It could also be quite effective as part of a control panel.
</p>
<p></p>
</div>
<div>
<ul>
<li><a href="../docs/meter.html">Meter charts API documentation</a></li>
</ul>
</div>
<div style="text-align: center">
<canvas id="meter1" width="400" height="250"><div class="canvasfallback">[No canvas support]</div></canvas>
<canvas id="meter2" width="400" height="250"><div class="canvasfallback">[No canvas support]</div></canvas>
</div>
</body>
</html>
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