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<title>RGraph: HTML5 Javascript charts library - odometer charts</title>
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<script>
window.onload = function ()
{
// ID, MINIMUM, MAXIMUM, INDICATED VALUE
var odo1 = new RGraph.Odometer('odo1', 0, 12,9.5);
odo1.Set('chart.labels', ['12', '1','2','3','4','5','6','7','8','9','10','11']);
odo1.Set('chart.needle.thickness', 5);
odo1.Set('chart.needle.color', 'black');
odo1.Set('chart.needle.extra', [[6, 'black', 50]]);
odo1.Set('chart.needle.head', false);
odo1.Set('chart.label.area', 40);
odo1.Set('chart.shadow.outer', true);
odo1.Set('chart.needle.tail', false);
odo1.Set('chart.green.color', 'gray');
odo1.Set('chart.yellow.color', 'gray');
odo1.Set('chart.red.color', 'gray');
RGraph.AddCustomEventListener(odo1, 'ondraw',
function (obj)
{
var context = obj.context;
context.strokeStyle = 'black';
context.fillStyle = 'white';
context.beginPath();
context.moveTo(obj.centerx, obj.centery);
context.arc(obj.centerx, obj.centery, 10, 0, 6.28, 0);
context.stroke();
context.fill();
}
);
odo1.Draw();
var odo2 = new RGraph.Odometer('odo2', 0, 360, 56);
odo2.Set('chart.needle.color', 'black');
odo2.Set('chart.needle.tail', false);
odo2.Set('chart.label.area', 35);
odo2.Set('chart.border', RGraph.isIE8() ? false : true);
odo2.Set('chart.labels', ['N','NE','E','SE','S','SW','W','NW']);
odo2.Set('chart.red.min', 360);
odo2.Set('chart.red.color', 'gray');
odo2.Set('chart.value.text', true);
odo2.Set('chart.value.units.post', '�');
odo2.Draw();
var odo3 = new RGraph.Odometer('odo3',0, 200, 160);
odo3.Set('chart.green.max', 150);
odo3.Set('chart.red.min', 175);
odo3.Set('chart.shadow.inner', true);
odo3.Set('chart.value.text', true);
odo3.Set('chart.value.units.post', ' litres');
odo3.Draw();
}
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<h1>RGraph: <span>HTML5 Javascript charts library</span> - Odometer 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>');
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<a href="../index.html">RGraph: HTML5 Javascript charts library</a>
>
<a href="./index.html">Examples</a>
>
Odometer charts
</div>
<div>
<p>
Odometer charts can be used to provide an indication of a particular value. For example you could easily use them to
represent values for a control panel that shows information about a server. Odometer charts indicating how much disk
space is used for example, would be more visual than a simple number.
</p>
<p>
The green, yellow and red areas are configurable, allowing you to add some level of urgency into your figures
(as are the colors). The
figures are also configurable, so it can go from 0-10, or from 0-100.
</p>
</div>
<div>
<ul>
<li><a href="../docs/odo.html">Odometer charts API documentation</a></li>
</ul>
</div>
<canvas id="odo1" width="300" height="300">[No canvas support]</canvas>
<canvas id="odo2" width="300" height="300">[No canvas support]</canvas>
<canvas id="odo3" width="300" height="300">[No canvas support]</canvas>
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