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| author | Igor Sfiligoi <isfiligoi@ucsd.edu> | 2013-11-07 12:50:35 -0500 |
|---|---|---|
| committer | Igor Sfiligoi <isfiligoi@ucsd.edu> | 2013-11-07 12:50:35 -0500 |
| commit | 680241cbb652ee29088baa6cde2da02002e5ec47 (patch) | |
| tree | 3f0c17df67c0ab0e91542ae75fff175750581859 /examples/tracking/index.html | |
| parent | f361d0498d284c6c7f3f366bf88e49b93e1245f0 (diff) | |
Diffstat (limited to 'examples/tracking/index.html')
| -rw-r--r-- | examples/tracking/index.html | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/examples/tracking/index.html b/examples/tracking/index.html new file mode 100644 index 0000000..59ace02 --- /dev/null +++ b/examples/tracking/index.html @@ -0,0 +1,135 @@ +<!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: Tracking</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 language="javascript" type="text/javascript" src="../../jquery.flot.crosshair.js"></script> + <script type="text/javascript"> + + $(function() { + + var sin = [], cos = []; + for (var i = 0; i < 14; i += 0.1) { + sin.push([i, Math.sin(i)]); + cos.push([i, Math.cos(i)]); + } + + plot = $.plot("#placeholder", [ + { data: sin, label: "sin(x) = -0.00"}, + { data: cos, label: "cos(x) = -0.00" } + ], { + series: { + lines: { + show: true + } + }, + crosshair: { + mode: "x" + }, + grid: { + hoverable: true, + autoHighlight: false + }, + yaxis: { + min: -1.2, + max: 1.2 + } + }); + + var legends = $("#placeholder .legendLabel"); + + legends.each(function () { + // fix the widths so they don't jump around + $(this).css('width', $(this).width()); + }); + + var updateLegendTimeout = null; + var latestPosition = null; + + function updateLegend() { + + updateLegendTimeout = null; + + var pos = latestPosition; + + var axes = plot.getAxes(); + if (pos.x < axes.xaxis.min || pos.x > axes.xaxis.max || + pos.y < axes.yaxis.min || pos.y > axes.yaxis.max) { + return; + } + + var i, j, dataset = plot.getData(); + for (i = 0; i < dataset.length; ++i) { + + var series = dataset[i]; + + // Find the nearest points, x-wise + + for (j = 0; j < series.data.length; ++j) { + if (series.data[j][0] > pos.x) { + break; + } + } + + // Now Interpolate + + var y, + p1 = series.data[j - 1], + p2 = series.data[j]; + + if (p1 == null) { + y = p2[1]; + } else if (p2 == null) { + y = p1[1]; + } else { + y = p1[1] + (p2[1] - p1[1]) * (pos.x - p1[0]) / (p2[0] - p1[0]); + } + + legends.eq(i).text(series.label.replace(/=.*/, "= " + y.toFixed(2))); + } + } + + $("#placeholder").bind("plothover", function (event, pos, item) { + latestPosition = pos; + if (!updateLegendTimeout) { + updateLegendTimeout = setTimeout(updateLegend, 50); + } + }); + + // Add the Flot version string to the footer + + $("#footer").prepend("Flot " + $.plot.version + " – "); + }); + + </script> +</head> +<body> + + <div id="header"> + <h2>Tracking</h2> + </div> + + <div id="content"> + + <div class="demo-container"> + <div id="placeholder" class="demo-placeholder"></div> + </div> + + <p>You can add crosshairs that'll track the mouse position, either on both axes or as here on only one.</p> + + <p>If you combine it with listening on hover events, you can use it to track the intersection on the curves by interpolating the data points (look at the legend).</p> + + <p id="hoverdata"></p> + + </div> + + <div id="footer"> + Copyright © 2007 - 2013 IOLA and Ole Laursen + </div> + +</body> +</html> |