summaryrefslogtreecommitdiff
path: root/examples/realtime.html
diff options
context:
space:
mode:
authorIgor Sfiligoi <isfiligoi@ucsd.edu>2011-03-22 07:30:12 -0400
committerIgor Sfiligoi <isfiligoi@ucsd.edu>2011-03-22 07:30:12 -0400
commitcb2e3d2743c0f88b430f14b7a396aa1a583dc978 (patch)
treea01293736eef098deff6d1cc832dcba0731ebb3e /examples/realtime.html
parentaf26aaa53d073a7b2d25caee93e1cb5ceb2e099c (diff)
flot-0.7
Diffstat (limited to 'examples/realtime.html')
-rw-r--r--examples/realtime.html83
1 files changed, 83 insertions, 0 deletions
diff --git a/examples/realtime.html b/examples/realtime.html
new file mode 100644
index 0000000..3b427e1
--- /dev/null
+++ b/examples/realtime.html
@@ -0,0 +1,83 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+ <head>
+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+ <title>Flot Examples</title>
+ <link href="layout.css" rel="stylesheet" type="text/css">
+ <!--[if lte IE 8]><script language="javascript" type="text/javascript" src="../excanvas.min.js"></script><![endif]-->
+ <script language="javascript" type="text/javascript" src="../jquery.js"></script>
+ <script language="javascript" type="text/javascript" src="../jquery.flot.js"></script>
+ </head>
+ <body>
+ <h1>Flot Examples</h1>
+
+ <div id="placeholder" style="width:600px;height:300px;"></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>
+
+<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;
+ var y = prev + Math.random() * 10 - 5;
+ if (y < 0)
+ y = 0;
+ 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;
+ }
+
+ // setup control widget
+ var updateInterval = 30;
+ $("#updateInterval").val(updateInterval).change(function () {
+ var v = $(this).val();
+ if (v && !isNaN(+v)) {
+ updateInterval = +v;
+ if (updateInterval < 1)
+ updateInterval = 1;
+ if (updateInterval > 2000)
+ updateInterval = 2000;
+ $(this).val("" + updateInterval);
+ }
+ });
+
+ // setup plot
+ var options = {
+ series: { shadowSize: 0 }, // drawing is faster without shadows
+ yaxis: { min: 0, max: 100 },
+ xaxis: { show: false }
+ };
+ var plot = $.plot($("#placeholder"), [ getRandomData() ], options);
+
+ 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();
+});
+</script>
+
+ </body>
+</html>