tests/daylight-savings.html

   1 <!DOCTYPE html>
   2 <html>
   3   <head>
   4     <link rel="stylesheet" href="../dist/dygraph.css">
   5     <title>Daylight Savings</title>
   6     <script type="text/javascript" src="../dist/dygraph.js"></script>
   7
   8     <style>
   9       body {
  10         max-width: 1024px;
  11       }
  12     </style>
  13
  14   </head>
  15   <body>
  16     <h2>DST</h2>
  17     <p>This tests that tick marks don't break when the axis crosses into
  18     daylight savings time.</p>
  19
  20     <div id="demodiv"></div>
  21
  22     <p>The tick marks should all be on day boundaries or nice hours (6, 12, 18),
  23     rather than on odd time boundaries like 5, 11, 17 and 23.</p>
  24
  25     <hr/>
  26     <div id="chart2"></div>
  27     <p>This chart shows a continuous line going across the "fall back" EST/EDT event. You may need to switch your computer's time zone to Eastern to see this. The x-axis tick marks go from 01:00 &rarr; 01:55 and then back to 01:00.</p>
  28
  29     <hr/>
  30     <div id="chart3"></div>
  31     <p>This chart is analogous to the first, except at a "spring forward".</p>
  32
  33     <hr/>
  34     <div id="chart4"></div>
  35     <p>This chart shows a continuous series which crosses a "spring forward". The x-axis ticks should skip from 1:55AM to 3:00AM.</p>
  36
  37     <script type="text/javascript">
  38       g = new Dygraph(
  39               document.getElementById("demodiv"),
  40 "Date/Time,Purchases\n" +
  41 "2010-11-05 00:00:00,167082\n" +
  42 "2010-11-06 00:00:00,168571\n" +
  43 "2010-11-07 00:00:00,177796\n" +
  44 "2010-11-08 00:00:00,165587\n" +
  45 "2010-11-09 00:00:00,164380\n",
  46           {
  47             width: 1024
  48           }
  49           );
  50
  51       // Generate data which crosses the EST/EDT boundary.
  52       var dst_data = [];
  53       var base_ms = 1383454200000;
  54       for (var x = base_ms; x < base_ms + 1000 * 60 * 80; x += 1000) {
  55         dst_data.push([new Date(x), x]);
  56       }
  57
  58       g2 = new Dygraph(
  59               document.getElementById("chart2"),
  60               dst_data,
  61           { width: 1024, labels: ['Date', 'Value'] }
  62           );
  63
  64       g3 = new Dygraph(
  65               document.getElementById("chart3"),
  66 "Date/Time,Purchases\n" +
  67 "2011-03-11 00:00:00,167082\n" +
  68 "2011-03-12 00:00:00,168571\n" +
  69 "2011-03-13 00:00:00,177796\n" +
  70 "2011-03-14 00:00:00,165587\n" +
  71 "2011-03-15 00:00:00,164380\n",
  72           {
  73             width: 1024,
  74             dateWindow: [1299989043119.4365, 1300080693627.4866]
  75           }
  76           );
  77
  78       var base_ms_spring = 1299999000000;
  79       var dst_data_spring = [];
  80       for (var x = base_ms_spring; x < base_ms_spring + 1000 * 60 * 80; x += 1000) {
  81         dst_data_spring.push([new Date(x), x]);
  82       }
  83
  84       g4 = new Dygraph(
  85           document.getElementById("chart4"),
  86           dst_data_spring,
  87           { width: 1024, labels: ['Date', 'Value'] }
  88       );
  89
  90     </script>
  91 </body>
  92 </html>