tests/daylight-savings.html

   1 <!DOCTYPE html>
   2 <html>
   3   <head>
   4     <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7; IE=EmulateIE9">
   5     <title>Daylight Savings</title>
   6     <!--[if IE]>
   7     <script type="text/javascript" src="../excanvas.js"></script>
   8     <![endif]-->
   9     <!--
  10     For production (minified) code, use:
  11     <script type="text/javascript" src="dygraph-combined.js"></script>
  12     -->
  13     <script type="text/javascript" src="../dygraph-dev.js"></script>
  14
  15     <style>
  16       body {
  17         max-width: 1024px;
  18       }
  19     </style>
  20
  21   </head>
  22   <body>
  23     <h2>DST</h2>
  24     <p>This tests that tick marks don't break when the axis crosses into
  25     daylight savings time.</p>
  26
  27     <div id="demodiv"></div>
  28
  29     <p>The tick marks should all be on day boundaries or nice hours (6, 12, 18),
  30     rather than on odd time boundaries like 5, 11, 17 and 23.</p>
  31
  32     <hr/>
  33     <div id="chart2"></div>
  34     <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>
  35
  36     <hr/>
  37     <div id="chart3"></div>
  38     <p>This chart is analogous to the first, except at a "spring forward".</p>
  39
  40     <hr/>
  41     <div id="chart4"></div>
  42     <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>
  43
  44     <script type="text/javascript">
  45       g = new Dygraph(
  46               document.getElementById("demodiv"),
  47 "Date/Time,Purchases\n" +
  48 "2010-11-05 00:00:00,167082\n" +
  49 "2010-11-06 00:00:00,168571\n" +
  50 "2010-11-07 00:00:00,177796\n" +
  51 "2010-11-08 00:00:00,165587\n" +
  52 "2010-11-09 00:00:00,164380\n",
  53           {
  54             width: 1024
  55           }
  56           );
  57
  58       // Generate data which crosses the EST/EDT boundary.
  59       var dst_data = [];
  60       var base_ms = 1383454200000;
  61       for (var x = base_ms; x < base_ms + 1000 * 60 * 80; x += 1000) {
  62         dst_data.push([new Date(x), x]);
  63       }
  64
  65       g2 = new Dygraph(
  66               document.getElementById("chart2"),
  67               dst_data,
  68           { width: 1024, labels: ['Date', 'Value'] }
  69           );
  70
  71       g3 = new Dygraph(
  72               document.getElementById("chart3"),
  73 "Date/Time,Purchases\n" +
  74 "2011-03-11 00:00:00,167082\n" +
  75 "2011-03-12 00:00:00,168571\n" +
  76 "2011-03-13 00:00:00,177796\n" +
  77 "2011-03-14 00:00:00,165587\n" +
  78 "2011-03-15 00:00:00,164380\n",
  79           {
  80             width: 1024,
  81             dateWindow: [1299989043119.4365, 1300080693627.4866]
  82           }
  83           );
  84
  85       var base_ms_spring = 1299999000000;
  86       var dst_data_spring = [];
  87       for (var x = base_ms_spring; x < base_ms_spring + 1000 * 60 * 80; x += 1000) {
  88         dst_data_spring.push([new Date(x), x]);
  89       }
  90
  91       g4 = new Dygraph(
  92           document.getElementById("chart4"),
  93           dst_data_spring,
  94           { width: 1024, labels: ['Date', 'Value'] }
  95       );
  96
  97     </script>
  98 </body>
  99 </html>