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<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<title>Flotr: Mouse Track Example</title>
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<div id="wrapper">
<h1></h1>
<div id="container" style="width:600px;height:300px;"></div>
<h2>Example</h2>
<p>This example show three series, there's nothing special about them. The thing that is special,
that they all have what I call mouse tracking. Flotr observes the 'flotr:mouseover' event, and
shows a point on the overlay canvas whenever the mouse comes near a datapoint.</p>
<p>
You can pass the mouse tracking options as the third argument of <code>Flotr.draw()</code>, or you can pass
the options per series. Hereby, you can enable or disable mousetracking for certain series. As you can see,
I disabled mouse tracking for the blue line (which is series d1).
</p>
<p>Finished? Go to the example <a href="index.html" title="Flotr Example Index Page">index page</a>, play with the <a href="../../playground/index.html" title="Flotr playground">playground</a> or read the <a href="http://www.solutoire.com/flotr/docs/" title="Flotr Documentation Pages">Flotr Documentation Pages</a>.</p>
<h2>The Code</h2>
<pre id="code-view"><code class="javascript"></code></pre>
<div id="footer">Copyright © 2008 Bas Wenneker, <a href="http://www.solutoire.com">solutoire.com</a></div>
</div>
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<script type="text/javascript">
/**
* Wait till dom's finished loading.
*/
document.observe('dom:loaded', function(){
/**
* Fill series d1 and d2.
*/
var d1 = [];
var d2 = [];
var d3 = [];
for(var i = 0; i < 20; i += 0.5){
d1.push([i, 2*i]);
d2.push([i, i*1.5+1.5*Math.sin(i)]);
d3.push([i, 3*Math.cos(i)+10]);
}
/**
* The following configuration disables mouse tracking for series d1,
* and configures mousetracking for series d2 and d3.
*/
var f = Flotr.draw(
$('container'),
[{data:d1,mouse:{track:false}}, d2, d3 ],
{
mouse:{
track: true,
lineColor: 'purple',
relative: true,
position: 'ne',
sensibility: 1, // => The smaller this value, the more precise you've to point
trackDecimals: 2,
trackFormatter: function(obj){ return 'x = ' + obj.x +', y = ' + obj.y; }
},
crosshair:{
mode: 'xy'
}
}
);
});
</script>
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