This DataTable polls for data from its DataSource every 5 seconds
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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>Polling the DataSource</title>
<style type="text/css">
/*margin and padding on body element
can introduce errors in determining
element position and are not recommended;
we turn them off as a foundation for YUI
CSS treatments. */
body {
margin:0;
padding:0;
}
</style>
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/fonts/fonts-min.css" />
<link rel="stylesheet" type="text/css" href="yui_2.7.0b-lib/datatable/assets/skins/sam/datatable.css" />
<script type="text/javascript" src="yui_2.7.0b-lib/yahoo-dom-event/yahoo-dom-event.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/dragdrop/dragdrop-min.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/element/element-min.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/datasource/datasource-min.js"></script>
<script type="text/javascript" src="yui_2.7.0b-lib/datatable/datatable-min.js"></script>
<!--there is no custom header content for this example-->
</head>
<body class=" yui-skin-sam">
<h1>Polling the DataSource</h1>
<div class="exampleIntro">
<p>This DataTable polls for data from its DataSource every 5 seconds. Due to browser limitations, implementers should use this feature to replace existing data, rather than continuously add data to the page.</p>
</div>
<!--BEGIN SOURCE CODE FOR EXAMPLE -->
<div id="polling"></div>
<script type="text/javascript" src="yui_2.7.0b-assets/datatable-assets/js/data.js"></script>
<script type="text/javascript">
YAHOO.util.Event.addListener(window, "load", function() {
YAHOO.example.Polling = function() {
var counter = 0;
var dataIncrementer = function() {
counter++;
return [{
count:counter,
description:"At the tone the time will be: ",
time: YAHOO.util.Date.format(new Date(), {format:"%I:%M:%S %p"})
}]
};
var myColumnDefs = [
{key: "count"},
{key: "description"},
{key: "time"}
];
var myDataSource = new YAHOO.util.DataSource(dataIncrementer);
myDataSource.responseType = YAHOO.util.DataSource.TYPE_JSARRAY;
myDataSource.responseSchema = {
fields: ["count", "description", "time"]
};
var myDataTable = new YAHOO.widget.DataTable("polling",
myColumnDefs, myDataSource);
// Set up polling
var myCallback = {
success: myDataTable.onDataReturnInitializeTable,
failure: function() {
YAHOO.log("Polling failure", "error");
},
scope: myDataTable
}
myDataSource.setInterval(5000, null, myCallback)
return {
oDS: myDataSource,
oDT: myDataTable
};
}();
});
</script>
<!--END SOURCE CODE FOR EXAMPLE -->
</body>
</html>
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