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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!--
Example HTML/javascript file that display the
content of a RRD archive file in a graph
using the Flot libraries
Part of the javascriptRRD package
Copyright (c) 2010 Frank Wuerthwein, fkw@ucsd.edu
Igor Sfiligoi, isfiligoi@ucsd.edu
Original repository: http://javascriptrrd.sourceforge.net/
MIT License [http://www.opensource.org/licenses/mit-license.php]
-->
<!--
This page requires Flot.
Repository: http://code.google.com/p/flot/
-->
<html>
<script type="text/javascript" src="../lib/binaryXHR.js"></script>
<script type="text/javascript" src="../lib/rrdFile.js"></script>
<!-- rrdFlotMatrix class needs the following four include files !-->
<script type="text/javascript" src="../lib/rrdFlotSupport.js"></script>
<script type="text/javascript" src="../lib/rrdFlotMatrix.js"></script>
<script type="text/javascript" src="../../flot/jquery.js"></script>
<script type="text/javascript" src="../../flot/jquery.flot.js"></script>
<script type="text/javascript" src="../../flot/jquery.flot.selection.js"></script>
<script type="text/javascript" src="../../flot/jquery.flot.tooltip.js"></script>
<head>
<title>Graph multiple RRDs with Flot</title>
</head>
<body>
<h1 id="title">Graph multiple RRDs with Flot</h1>
RRD group: <select id="input_fname" onchange="fname_update()"></select>
<button onclick="fname_update()">Update</button>
<hr>
<table id="infotable" border=1>
<tr><td colspan="21"><b>Javascript needed for this page to work</b></td></tr>
<tr><td><b>RRD file</b></td><td id="fname" colspan="5">None</td></tr>
</table>
<div id="mygraph"></div>
<script type="text/javascript">
// Remove the Javascript warning
document.getElementById("infotable").deleteRow(0);
{
var form_el=document.getElementById('input_fname');
form_el.appendChild(new Option("example4","example4"));
}
// fname_group and rrd_data are the global variable used by all the functions below
fname_group=null;
rrd_data=[];
// This function updates the Web Page with the data from the RRD archive header
// when a new file is selected
function update_fname() {
// Finally, update the file name and enable the update button
document.getElementById("fname").firstChild.data="Group "+fname_group;
// the rrdFlot object creates and handles the graph
var f=new rrdFlotMatrix("mygraph",[['s1',rrd_data[0]],['s2',rrd_data[1]],['s3',rrd_data[2]]],null,{legend:{position:'ne'}},{'s2':{checked:false},'s1':{title:'First rrd'}});
}
// This is the callback function that,
// given a binary file object,
// verifies that it is a valid RRD archive
// and performs the update of the Web page
function update_fname_handler(bf,idx) {
var i_rrd_data=undefined;
try {
var i_rrd_data=new RRDFile(bf);
} catch(err) {
alert("File at idx "+idx+" is not a valid RRD archive!");
}
if (i_rrd_data!=undefined) {
rrd_data[idx]=i_rrd_data;
}
if ((rrd_data[0]!=undefined) && (rrd_data[1]!=undefined) && (rrd_data[2]!=undefined)) {
update_fname()
}
}
// this function is invoked when the RRD file name changes
function fname_update() {
var base_el=document.getElementById("mygraph");
// First clean up anything in the element
while (base_el.lastChild!=null) base_el.removeChild(base_el.lastChild);
rrd_data[0]=rrd_data[1]=rrd_data[2]=undefined;
fname_group=document.getElementById("input_fname").value;
fname1=fname_group+"_s1.rrd";
fname2=fname_group+"_s2.rrd";
fname3=fname_group+"_s3.rrd";
document.getElementById("fname").firstChild.data="Loading group "+fname_group;
try {
FetchBinaryURLAsync(fname1,update_fname_handler,0);
} catch (err) {
alert("Failed loading "+fname1+"\n"+err);
}
try {
FetchBinaryURLAsync(fname2,update_fname_handler,1);
} catch (err) {
alert("Failed loading "+fname2+"\n"+err);
}
try {
FetchBinaryURLAsync(fname3,update_fname_handler,2);
} catch (err) {
alert("Failed loading "+fname3+"\n"+err);
}
}
</script>
</body>
</html>
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