- Stop charts with no visible plots from crashing.
[dygraphs.git] / tests / highlighted-region.html
1 <html>
2 <head>
3 <title>Highlighted Region</title>
4 <!--[if IE]>
5 <script type="text/javascript" src="../excanvas.js"></script>
6 <![endif]-->
7 <script type="text/javascript" src="../strftime/strftime-min.js"></script>
8 <script type="text/javascript" src="../rgbcolor/rgbcolor.js"></script>
9 <script type="text/javascript" src="../dygraph-canvas.js"></script>
10 <script type="text/javascript" src="../dygraph.js"></script>
11 <script type="text/javascript" src="data.js"></script>
12 </head>
13 <body>
14 <p>Should draw a time series with an unusual region highlighted:</p>
15 <div id="div_g" style="width:600px; height:300px;"></div>
16
17 <p>When you zoom/pan, the region should remain highlighted.</p>
18
19 <script type="text/javascript">
20 // A basic sinusoidal data series.
21 var data = [];
22 for (var i = 0; i < 1000; i++) {
23 var base = 10 * Math.sin(i / 90.0);
24 data.push([i, base, base + Math.sin(i / 2.0)]);
25 }
26
27 // Shift one portion out of line.
28 var highlight_start = 450;
29 var highlight_end = 500;
30 for (var i = highlight_start; i <= highlight_end; i++) {
31 data[i][2] += 5.0;
32 }
33
34
35 new Dygraph(
36 document.getElementById("div_g"),
37 data,
38 {
39 labels: ['X', 'Est.', 'Actual'],
40 underlayCallback: function(canvas, area, g) {
41 var bottom_left = g.toDomCoords(highlight_start, -20);
42 var top_right = g.toDomCoords(highlight_end, +20);
43
44 var left = bottom_left[0];
45 var right = top_right[0];
46
47 canvas.fillStyle = "rgba(255, 255, 102, 1.0)";
48 canvas.fillRect(left, area.y, right - left, area.h);
49 }
50
51 }
52 );
53 </script>
54 </body>
55 </html>