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<title>RGraph: HTML5 Javascript charts library - Adjusting your charts interactively - Thermometer chart</title>
<meta name="keywords" content="rgraph html5 canvas chart adjusting docs" />
<meta name="description" content="RGraph: HTML5 Javascript charts library - Documentation about adjusting your charts - Thermometer chart" />
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<script src="../libraries/RGraph.common.core.js" ></script>
<script src="../libraries/RGraph.common.adjusting.js" ></script>
<script src="../libraries/RGraph.thermometer.js" ></script>
<!--[if IE 8]><script src="../excanvas/excanvas.original.js"></script><![endif]-->
<script>
window.onload = function (e)
{
var thermometer = new RGraph.Thermometer('myc', 0, 100, 78);
var grad = thermometer.context.createLinearGradient(0,50,0,350);
grad.addColorStop(0, 'orange');
grad.addColorStop(1, 'white');
thermometer.Set('chart.colors', [grad]);
thermometer.Set('chart.title.side', 'An adjustable thermometer');
thermometer.Set('chart.adjustable', true);
thermometer.Draw();
RGraph.AddCustomEventListener(thermometer, 'onadjustbegin', function (obj) {document.getElementById("output").value += 'Value before adjustment: ' + obj.value + '\n';});
RGraph.AddCustomEventListener(thermometer, 'onadjust', function (obj) {document.getElementById("output").value += 'Value during adjustment: ' + obj.value + '\n';});
RGraph.AddCustomEventListener(thermometer, 'onadjustend', function (obj) {document.getElementById("output").value += 'Value after adjustment: ' + obj.value + '\n';});
}
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<a href="../index.html">RGraph: HTML5 Javascript charts library</a>
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<a href="index.html">Documentation</a>
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<a href="adjusting.html">Adjusting charts interactively</a>
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Thermometer chart
</div>
<h1>RGraph: <span>HTML5 Javascript charts library</span> - Adjusting your charts interactively - Thermometer chart</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>
<canvas id="myc" width="100" height="400" style="float: left">[No canvas support]</canvas>
<p>
Nothing pertinent is kept in the registry. If you wish to get the new value of the thermometer you can check <i>obj.value</i>.
If you want the value before the adjustment, you can check the value with the onadjustbegin event (instead of the
onadjustend event).
</p>
<p>
<textarea id="output" style="width: 600px; height: 200px;"></textarea>
</p>
<br clear="all" />
<pre class="code">
<script>
window.onload = function (e)
{
var thermometer = new RGraph.Thermometer('myc', 0, 100, 78);
var grad = thermometer.context.createLinearGradient(0,50,0,350);
grad.addColorStop(0, 'orange');
grad.addColorStop(1, 'white');
thermometer.Set('chart.colors', [grad]);
thermometer.Set('chart.title.side', 'An adjustable thermometer');
thermometer.Set('chart.adjustable', true);
thermometer.Draw();
RGraph.AddCustomEventListener(thermometer, 'onadjustbegin', function (obj) {document.getElementById("output").value += 'Value before adjustment: ' + obj.value + '\n';});
RGraph.AddCustomEventListener(thermometer, 'onadjust', function (obj) {document.getElementById("output").value += 'Value during adjustment: ' + obj.value + '\n';});
RGraph.AddCustomEventListener(thermometer, 'onadjustend', function (obj) {document.getElementById("output").value += 'Value after adjustment: ' + obj.value + '\n';});
}
</script>
</pre>
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