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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<title>Munin: dynamic graph zoom</title>
<script src="formatdate.js" type="text/javascript"></script>
<script src="querystring.js" type="text/javascript"></script>
<style type="text/css">
#overlayDiv {
opacity: .55;
filter: alpha(opacity=55);
background-color:#EEE;
position: absolute;
z-index: 2;
}
</style>
</head>
<body>
<div style="position:relative;">
<img id="image" src="" alt="Dynamically zoomable graph" />
<div id="overlayDiv" />
</div>
<table>
<tr>
<td>
</td>
<td>
Zooming is very easy, it's done in 3 clicks (regular clicks, no drag&drop):
<ol>
<li>First click to define the start of zoom.</li>
<li>Second click to define the ending of zoom.</li>
<li>Third click inside the defined zone to zoom, outside to cancel the zone.</li>
</ol>
</td>
</tr>
</table>
<form id="myNewForm" action="">
<table>
<!-- Plugin Name : "domain/hostname" -->
<tr>
<td>Plugin Name <em>(domain/hostname/plugin_name)</em> :</td>
<td><input type="text" name="plugin_name" size="64" /></td>
</tr>
<!-- Start and stop -->
<tr>
<td>Start/Stop of the graph <br/>(format:2005-08-15T15:52:01+0000) <br/><em>(epoch)</em> :</td>
<td>
<input type="text" name="start_iso8601" size="24" /> / <input type="text" name="stop_iso8601" size="24" /> <input name="btnMaj" type="button" value="update" /> <br/>
(<input type="text" name="start_epoch" size="10" /> / <input type="text" name="stop_epoch" size="10" />)
</td>
</tr>
<!-- Limit high & low -->
<tr>
<td>Limit low/high :</td>
<td>
<input type="text" name="lower_limit" size="10" /> / <input type="text" name="upper_limit" size="10" />
</td>
</tr>
<!-- Image size -->
<tr>
<td>Graph size (w/o legend) <em>(pixels)</em>:</td>
<td>
<input type="text" name="size_x" size="5" /> / <input type="text" name="size_y" size="5" />
</td>
</tr>
</table>
<p>
<input type="hidden" name="cgiurl_graph" />
<input type="submit" />
<input type="button" name="btnZoomOut" value="Zoom Out x2" />
</p>
</form>
<script type="text/javascript">
//<![CDATA[
// Insert values in the form
var qs = new Querystring();
var form = document.getElementById("myNewForm");
var image = document.getElementById("image");
var divOverlay = document.getElementById("overlayDiv");
form.cgiurl_graph.value = qs.get("cgiurl_graph", "/munin-cgi/munin-cgi-graph");
form.plugin_name.value = qs.get("plugin_name", "localdomain/localhost.localdomain/if_eth0");
form.start_epoch.value = qs.get("start_epoch", "1236561663");
form.stop_epoch.value = qs.get("stop_epoch", "1237561663");
form.lower_limit.value = qs.get("lower_limit", "");
form.upper_limit.value = qs.get("upper_limit", "");
form.size_x.value = qs.get("size_x", "");
form.size_y.value = qs.get("size_y", "");
form.btnMaj.onclick = majDates;
form.btnZoomOut.onclick = zoomOut;
// Refresh the image with the selected params
var scale = refreshImg();
function refreshImg() {
image.src = form.cgiurl_graph.value + "/"
+ form.plugin_name.value
+ "-pinpoint=" + parseInt(form.start_epoch.value) + "," + parseInt(form.stop_epoch.value)
+ ".png"
+ "?"
+ "&lower_limit=" + form.lower_limit.value
+ "&upper_limit=" + form.upper_limit.value
+ "&size_x=" + form.size_x.value
+ "&size_y=" + form.size_y.value
;
return ((+form.stop_epoch.value) - (+form.start_epoch.value)) / (+form.size_x.value);
}
var start_epoch = (+form.start_epoch.value);
var stop_epoch = (+form.stop_epoch.value);
var initial_left;
var initial_top;
updateStartStop();
function updateStartStop() {
form.start_iso8601.value = new Date(form.start_epoch.value * 1000).formatDate(Date.DATE_ISO8601);
form.stop_iso8601.value = new Date(form.stop_epoch.value * 1000).formatDate(Date.DATE_ISO8601);
}
function divMouseMove(mouseMouveEvent) {
var delta_x;
var size_x;
// Handling the borders (X1>X2 ou X1<X2)
var current_width = mouseMouveEvent.pageX - initial_left;
if (current_width < 0) {
divOverlay.style.left = mouseMouveEvent.pageX;
delta_x = mouseMouveEvent.pageX - 63; // the Y Axis is 63px from the left border
divOverlay.style.width = size_x = - current_width;
} else {
divOverlay.style.left = initial_left;
delta_x = initial_left - 63; // the Y Axis is 63px from the left border
divOverlay.style.width = size_x = current_width;
}
// Compute the epochs UNIX (only for horizontal)
form.start_epoch.value = start_epoch + scale * delta_x;
form.stop_epoch.value = start_epoch + scale * ( delta_x + size_x );
// update !
updateStartStop();
}
function startZoom(mouseMouveEvent) {
initial_left = mouseMouveEvent.pageX;
initial_top = mouseMouveEvent.pageY;
// Fixed, since zoom is only horizontal
divOverlay.style.top = image.style.top.replace("px", "") + 29;
divOverlay.style.height = (+form.size_y.value) + 1;
// Show the div
divOverlay.style.visibility = 'visible';
divOverlay.style.backgroundColor = '#555';
// Initial show
divOverlay.style.left = mouseMouveEvent.pageX;
//divOverlay.style.width = (+form.size_x.value) / 4;
divOverlay.style.width = 40;
// Fix the handles
image.onmousemove = divMouseMove;
divOverlay.onmousemove = divMouseMove;
divOverlay.onclick = image.onclick;
}
function endZoom(event) {
divOverlay.style.backgroundColor = '#000';
image.onmousemove = undefined;
divOverlay.onmousemove = undefined;
divOverlay.onclick = doZoom;
}
function clearZoom(event) {
divOverlay.style.visibility = 'hidden';
divOverlay.style.width = 0;
// reset the zoom
form.start_epoch.value = start_epoch;
form.stop_epoch.value = stop_epoch;
updateStartStop();
}
function doZoom(event) {
// Navigate !
form.submit();
}
function zoomOut(event) {
form.start_epoch.value = start_epoch - scale * form.size_x.value;
form.stop_epoch.value= stop_epoch + scale * form.size_y.value;
form.submit();
}
function fillDate(date, default_date) {
return date + default_date.substring(date.length, default_date.length);
}
function majDates(event) {
var default_date = "2009-01-01T00:00:00+0100";
var start_manual = fillDate(form.start_iso8601.value, default_date);
var stop_manual = fillDate(form.stop_iso8601.value, default_date);
var dateRegex = /(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}).(\d{4})/;
if (dateRegex.test(start_manual)) {
var dateparts = start_manual.match(dateRegex);
var date_parsed = new Date(dateparts[1], dateparts[2] - 1, dateparts[3],
dateparts[4], dateparts[5], dateparts[6]);
form.start_epoch.value = date_parsed.getTime() / 1000;
}
if (dateRegex.test(stop_manual)) {
var dateparts = stop_manual.match(dateRegex);
var date_parsed = new Date(dateparts[1], dateparts[2] - 1, dateparts[3],
dateparts[4], dateparts[5], dateparts[6]);
form.stop_epoch.value = date_parsed.getTime() / 1000;
} form.submit();
}
// Sets the onClick handler
divOverlay.onclick = image.onclick = click;
var clickCounter = 1;
function click(event) {
switch ((clickCounter++) % 3) {
case 0:
clearZoom(event);
break;
case 1:
startZoom(event);
break;
case 2:
endZoom(event);
break;
}
}
//]]>
</script>
</body>
</html>
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