Created
July 14, 2012 15:50
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Shows an issue on chrome when too many points are displayed
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| <!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> | |
| <script type="text/javascript" src="js/jquery-1.7.2.min.js"></script> | |
| <script type="text/javascript" src="js/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 | |
| // EDIT - increased the number of total points | |
| var data = [], totalPoints = 3645; | |
| 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; | |
| // EDIT - pushing always the same value | |
| data.push(10); | |
| } | |
| // 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() ]); | |
| //plot.setupGrid() | |
| plot.draw(); | |
| setTimeout(update, updateInterval); | |
| } | |
| update(); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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