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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>Flot Examples: Interacting with axes</title>
	<link href="../examples.css" rel="stylesheet" type="text/css">
	<!--[if lte IE 8]><script language="javascript" type="text/javascript" src="../../excanvas.min.js"></script><![endif]-->
	<script language="javascript" type="text/javascript" src="../../jquery.js"></script>
	<script language="javascript" type="text/javascript" src="../../jquery.flot.js"></script>
	<script type="text/javascript">

	$(function() {

		function generate(start, end, fn) {
			var res = [];
			for (var i = 0; i <= 100; ++i) {
				var x = start + i / 100 * (end - start);
				res.push([x, fn(x)]);
			}
			return res;
		}

		var data = [
			{ data: generate(0, 10, function (x) { return Math.sqrt(x);}), xaxis: 1, yaxis:1 },
			{ data: generate(0, 10, function (x) { return Math.sin(x);}), xaxis: 1, yaxis:2 },
			{ data: generate(0, 10, function (x) { return Math.cos(x);}), xaxis: 1, yaxis:3 },
			{ data: generate(2, 10, function (x) { return Math.tan(x);}), xaxis: 2, yaxis: 4 }
		];

		var plot = $.plot("#placeholder", data, {
			xaxes: [
				{ position: 'bottom' },
				{ position: 'top'}
			],
			yaxes: [
				{ position: 'left' },
				{ position: 'left' },
				{ position: 'right' },
				{ position: 'left' }
			]
		});

		// Create a div for each axis

		$.each(plot.getAxes(), function (i, axis) {
			if (!axis.show)
				return;

			var box = axis.box;

			$("<div class='axisTarget' style='position:absolute; left:" + box.left + "px; top:" + box.top + "px; width:" + box.width +  "px; height:" + box.height + "px'></div>")
				.data("axis.direction", axis.direction)
				.data("axis.n", axis.n)
				.css({ backgroundColor: "#f00", opacity: 0, cursor: "pointer" })
				.appendTo(plot.getPlaceholder())
				.hover(
					function () { $(this).css({ opacity: 0.10 }) },
					function () { $(this).css({ opacity: 0 }) }
				)
				.click(function () {
					$("#click").text("You clicked the " + axis.direction + axis.n + "axis!")
				});
		});

		// Add the Flot version string to the footer

		$("#footer").prepend("Flot " + $.plot.version + " &ndash; ");
	});

	</script>
</head>
<body>

	<div id="header">
		<h2>Interacting with axes</h2>
	</div>

	<div id="content">

		<div class="demo-container">
			<div id="placeholder" class="demo-placeholder"></div>
		</div>

		<p>With multiple axes, you sometimes need to interact with them. A simple way to do this is to draw the plot, deduce the axis placements and insert a couple of divs on top to catch events.</p>

		<p>Try clicking an axis.</p>

		<p id="click"></p>

	</div>

	<div id="footer">
		Copyright &copy; 2007 - 2014 IOLA and Ole Laursen
	</div>

</body>
</html>

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