143 lines
4.6 KiB
HTML
143 lines
4.6 KiB
HTML
<!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"></link>
|
|
<!--[if IE]><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>Example of loading data dynamically with AJAX. Percentage change in GDP (source: <a href="http://epp.eurostat.ec.europa.eu/tgm/table.do?tab=table&init=1&plugin=1&language=en&pcode=tsieb020">Eurostat</a>). Click the buttons below.</p>
|
|
|
|
<p>The data is fetched over HTTP, in this case directly from text
|
|
files. Usually the URL would point to some web server handler
|
|
(e.g. a PHP page or Java/.NET/Python/Ruby on Rails handler) that
|
|
extracts it from a database and serializes it to JSON.</p>
|
|
|
|
<p>
|
|
<input class="fetchSeries" type="button" value="First dataset"> -
|
|
<a href="data-eu-gdp-growth.json">data</a> -
|
|
<span></span>
|
|
</p>
|
|
|
|
<p>
|
|
<input class="fetchSeries" type="button" value="Second dataset"> -
|
|
<a href="data-japan-gdp-growth.json">data</a> -
|
|
<span></span>
|
|
</p>
|
|
|
|
<p>
|
|
<input class="fetchSeries" type="button" value="Third dataset"> -
|
|
<a href="data-usa-gdp-growth.json">data</a> -
|
|
<span></span>
|
|
</p>
|
|
|
|
<p>If you combine AJAX with setTimeout, you can poll the server
|
|
for new data.</p>
|
|
|
|
<p>
|
|
<input class="dataUpdate" type="button" value="Poll for data">
|
|
</p>
|
|
|
|
<script id="source" language="javascript" type="text/javascript">
|
|
$(function () {
|
|
var options = {
|
|
lines: { show: true },
|
|
points: { show: true },
|
|
xaxis: { tickDecimals: 0, tickSize: 1 }
|
|
};
|
|
var data = [];
|
|
var placeholder = $("#placeholder");
|
|
|
|
$.plot(placeholder, data, options);
|
|
|
|
|
|
// fetch one series, adding to what we got
|
|
var alreadyFetched = {};
|
|
|
|
$("input.fetchSeries").click(function () {
|
|
var button = $(this);
|
|
|
|
// find the URL in the link right next to us
|
|
var dataurl = button.siblings('a').attr('href');
|
|
|
|
// then fetch the data with jQuery
|
|
function onDataReceived(series) {
|
|
// extract the first coordinate pair so you can see that
|
|
// data is now an ordinary Javascript object
|
|
var firstcoordinate = '(' + series.data[0][0] + ', ' + series.data[0][1] + ')';
|
|
|
|
button.siblings('span').text('Fetched ' + series.label + ', first point: ' + firstcoordinate);
|
|
|
|
// let's add it to our current data
|
|
if (!alreadyFetched[series.label]) {
|
|
alreadyFetched[series.label] = true;
|
|
data.push(series);
|
|
}
|
|
|
|
// and plot all we got
|
|
$.plot(placeholder, data, options);
|
|
}
|
|
|
|
$.ajax({
|
|
url: dataurl,
|
|
method: 'GET',
|
|
dataType: 'json',
|
|
success: onDataReceived
|
|
});
|
|
});
|
|
|
|
|
|
// initiate a recurring data update
|
|
$("input.dataUpdate").click(function () {
|
|
// reset data
|
|
data = [];
|
|
alreadyFetched = {};
|
|
|
|
$.plot(placeholder, data, options);
|
|
|
|
var iteration = 0;
|
|
|
|
function fetchData() {
|
|
++iteration;
|
|
|
|
function onDataReceived(series) {
|
|
// we get all the data in one go, if we only got partial
|
|
// data, we could merge it with what we already got
|
|
data = [ series ];
|
|
|
|
$.plot($("#placeholder"), data, options);
|
|
}
|
|
|
|
$.ajax({
|
|
// usually, we'll just call the same URL, a script
|
|
// connected to a database, but in this case we only
|
|
// have static example files so we need to modify the
|
|
// URL
|
|
url: "data-eu-gdp-growth-" + iteration + ".json",
|
|
method: 'GET',
|
|
dataType: 'json',
|
|
success: onDataReceived
|
|
});
|
|
|
|
if (iteration < 5)
|
|
setTimeout(fetchData, 1000);
|
|
else {
|
|
data = [];
|
|
alreadyFetched = {};
|
|
}
|
|
}
|
|
|
|
setTimeout(fetchData, 1000);
|
|
});
|
|
});
|
|
</script>
|
|
|
|
</body>
|
|
</html>
|