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+<!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: AJAX</title>
+ <link href="../examples.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>
+ <script type="text/javascript">
+
+ $(function() {
+
+ var options = {
+ lines: {
+ show: true
+ },
+ points: {
+ show: true
+ },
+ xaxis: {
+ tickDecimals: 0,
+ tickSize: 1
+ }
+ };
+
+ var data = [];
+
+ $.plot("#placeholder", data, options);
+
+ // Fetch one series, adding to what we already have
+
+ var alreadyFetched = {};
+
+ $("button.fetchSeries").click(function () {
+
+ var button = $(this);
+
+ // Find the URL in the link right next to us, then fetch the data
+
+ var dataurl = button.siblings("a").attr("href");
+
+ function onDataReceived(series) {
+
+ // Extract the first coordinate pair; jQuery has parsed it, so
+ // the data is now just an ordinary JavaScript object
+
+ var firstcoordinate = "(" + series.data[0][0] + ", " + series.data[0][1] + ")";
+ button.siblings("span").text("Fetched " + series.label + ", first point: " + firstcoordinate);
+
+ // Push the new data onto our existing data array
+
+ if (!alreadyFetched[series.label]) {
+ alreadyFetched[series.label] = true;
+ data.push(series);
+ }
+
+ $.plot("#placeholder", data, options);
+ }
+
+ $.ajax({
+ url: dataurl,
+ type: "GET",
+ dataType: "json",
+ success: onDataReceived
+ });
+ });
+
+ // Initiate a recurring data update
+
+ $("button.dataUpdate").click(function () {
+
+ data = [];
+ alreadyFetched = {};
+
+ $.plot("#placeholder", data, options);
+
+ var iteration = 0;
+
+ function fetchData() {
+
+ ++iteration;
+
+ function onDataReceived(series) {
+
+ // Load all the data in one pass; if we only got partial
+ // data we could merge it with what we already have.
+
+ data = [ series ];
+ $.plot("#placeholder", data, options);
+ }
+
+ // Normally we 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.
+
+ $.ajax({
+ url: "data-eu-gdp-growth-" + iteration + ".json",
+ type: "GET",
+ dataType: "json",
+ success: onDataReceived
+ });
+
+ if (iteration < 5) {
+ setTimeout(fetchData, 1000);
+ } else {
+ data = [];
+ alreadyFetched = {};
+ }
+ }
+
+ setTimeout(fetchData, 1000);
+ });
+
+ // Load the first series by default, so we don't have an empty plot
+
+ $("button.fetchSeries:first").click();
+
+ // Add the Flot version string to the footer
+
+ $("#footer").prepend("Flot " + $.plot.version + " &ndash; ");
+ });
+
+ </script>
+</head>
+<body>
+
+ <div id="header">
+ <h2>AJAX</h2>
+ </div>
+
+ <div id="content">
+
+ <div class="demo-container">
+ <div id="placeholder" class="demo-placeholder"></div>
+ </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>
+ <button class="fetchSeries">First dataset</button>
+ [ <a href="data-eu-gdp-growth.json">see data</a> ]
+ <span></span>
+ </p>
+
+ <p>
+ <button class="fetchSeries">Second dataset</button>
+ [ <a href="data-japan-gdp-growth.json">see data</a> ]
+ <span></span>
+ </p>
+
+ <p>
+ <button class="fetchSeries">Third dataset</button>
+ [ <a href="data-usa-gdp-growth.json">see data</a> ]
+ <span></span>
+ </p>
+
+ <p>If you combine AJAX with setTimeout, you can poll the server for new data.</p>
+
+ <p>
+ <button class="dataUpdate">Poll for data</button>
+ </p>
+
+ </div>
+
+ <div id="footer">
+ Copyright &copy; 2007 - 2013 IOLA and Ole Laursen
+ </div>
+
+</body>
+</html>