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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>
- <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>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 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>