/usr/share/doc/libjs-flotr/examples/mouse-drag.html is in libjs-flotr 0.2.1~r301-1.
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<html>
<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 Drag Example</title>
<link rel="stylesheet" href="style.css" type="text/css" />
<script type="text/javascript" src="../flotr/lib/prototype.js"></script>
<script type="text/javascript" src="examples.js"></script>
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<script type="text/javascript" src="../flotr/lib/excanvas.js"></script>
<script type="text/javascript" src="../flotr/lib/base64.js"></script>
<![endif]-->
<script type="text/javascript" src="../flotr/lib/canvas2image.js"></script>
<script type="text/javascript" src="../flotr/lib/canvastext.js"></script>
<script type="text/javascript" src="../flotr/flotr-0.2.1.js"></script>
</head>
<body>
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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 how to implement a dragging functionnality to Flotr.</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 = -40; i < 40; i += 0.5){
d1.push([i, Math.sin(i)+3*Math.cos(i)]);
d2.push([i, Math.pow(1.1, i)]);
d3.push([i, 40 - i+Math.random()*10]);
}
/**
* Global options object.
*/
var options = {
xaxis: {min: 0, max: 20}
};
/**
* Function displays a graph in the 'container' element, extending
* the global options object with the optionally passed options.
*/
function drawGraph(opts){
/**
* Clone the options, so the 'options' variable always keeps intact.
*/
var o = Object.extend(Object.clone(options), opts || {});
/**
* Return a new graph.
*/
return Flotr.draw(
$('container'),
[ d1, d2, d3 ],
o
);
}
/**
* Actually draw the graph.
*/
var f = drawGraph();
var start;
/** Fired on mouse down */
function drag(e){
start = f.getEventPosition(e);
document.observe('mousemove', move);
document.observe('mouseup', release);
}
/** Fired on mouse move */
function move(e){
var end = f.getEventPosition(e),
xaxis = f.axes.x,
offset = start.x - end.x;
f = drawGraph({
xaxis: {min: xaxis.min + offset, max: xaxis.max + offset}
});
// @todo: refector initEvents in order not to remove other observed events
f.overlay.observe('mousedown', drag);
}
/** Fired on mouse up */
function release(e){
document.stopObserving('mousemove', move);
}
f.overlay.observe('mousedown', drag);
});
</script>
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</body>
</html>
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