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-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
-<html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
- <title>Flot Examples</title>
- <link href="layout.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>
- </head>
- <body>
- <h1>Flot Examples</h1>
-
- <div id="placeholder" style="width:600px;height:300px"></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>
-
-<script type="text/javascript">
-var plot;
-$(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);
- });
-});
-</script>
-
- </body>
-</html>