inc/lib/flot-0.8.3/examples/realtime/index.html (591cf0f)

index.html

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
	<title>Flot Examples: Real-time updates</title>
	<link href="../examples.css" rel="stylesheet" type="text/css">
	
	<script language="javascript" type="text/javascript" src="../../jquery.js"></script>
	<script language="javascript" type="text/javascript" src="../../jquery.flot.js"></script>
	<script type="text/javascript">

$(function() {

// We use an inline data source in the example, usually data would
		// be fetched from a server

var data = [],
			totalPoints = 300;

function getRandomData() {

if (data.length > 0)
				data = data.slice(1);

// Do a random walk

while (data.length < totalPoints) {

var prev = data.length > 0 ? data[data.length - 1] : 50,
					y = prev + Math.random() * 10 - 5;

if (y < 0) {
					y = 0;
				} else if (y > 100) {
					y = 100;
				}

data.push(y);
			}

// Zip the generated y values with the x values

var res = [];
			for (var i = 0; i < data.length; ++i) {
				res.push([i, data[i]])
			}

return res;
		}

// Set up the control widget

var plot = $.plot("#placeholder", [ getRandomData() ], {
			series: {
				shadowSize: 0	// Drawing is faster without shadows
			},
			yaxis: {
				min: 0,
				max: 100
			},
			xaxis: {
				show: false
			}
		});

function update() {

plot.setData([getRandomData()]);

// Since the axes don't change, we don't need to call plot.setupGrid()

plot.draw();
			setTimeout(update, updateInterval);
		}

update();

// Add the Flot version string to the footer

$("#footer").prepend("Flot " + $.plot.version + " &ndash; ");
	});

</script>
</head>
<body>

<div id="header">
		<h2>Real-time updates</h2>
	</div>

<p>You can update a chart periodically to get a real-time effect by using a timer to insert the new data in the plot and redraw it.</p>

<p>Time between updates: <input id="updateInterval" type="text" value="" style="text-align: right; width:5em"> milliseconds</p>

</div>

</body>
</html>

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