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.
  35     You may need to switch your computer's time zone to Eastern to see this.
  36     The x-axis tick marks go from 01:00 &rarr; 01:55 and then back to 01:00.</p>
  37
  38     <hr/>
  39     <div id="chart3"></div>
  40     <p>This chart is analogous to the first, except at a "spring forward".</p>
  41
  42     <hr/>
  43     <div id="chart4"></div>
  44     <p>This chart shows a continuous series which crosses a "spring forward".
  45     The x-axis ticks should skip from 1:50AM to 3:00AM.</p>
  46
  47     <script type="text/javascript">
  48       g = new Dygraph(
  49               document.getElementById("demodiv"),
  50 "Date/Time,Purchases\n" +
  51 "2010-11-05 00:00:00,167082\n" +
  52 "2010-11-06 00:00:00,168571\n" +
  53 "2010-11-07 00:00:00,177796\n" +
  54 "2010-11-08 00:00:00,165587\n" +
  55 "2010-11-09 00:00:00,164380\n",
  56           {
  57             width: 1024
  58           }
  59           );
  60
  61       // Generate data which crosses the EST/EDT boundary.
  62       var dst_data = [];
  63       var base_ms = 1383453600000;
  64       for (var x = base_ms; x < base_ms + 1000 * 60 * 160; x += 1000) {
  65         dst_data.push([new Date(x), x]);
  66       }
  67
  68       g2 = new Dygraph(
  69               document.getElementById("chart2"),
  70               dst_data,
  71           { width: 1024, labels: ['Date', 'Value'] }
  72           );
  73
  74       g3 = new Dygraph(
  75               document.getElementById("chart3"),
  76 "Date/Time,Purchases\n" +
  77 "2011-03-11 00:00:00,167082\n" +
  78 "2011-03-12 00:00:00,168571\n" +
  79 "2011-03-13 00:00:00,177796\n" +
  80 "2011-03-14 00:00:00,165587\n" +
  81 "2011-03-15 00:00:00,164380\n",
  82           {
  83             width: 1024,
  84             dateWindow: [1299989043119.4365, 1300080693627.4866]
  85           }
  86           );
  87
  88       var base_ms_spring = 1299997800000;
  89       var dst_data_spring = [];
  90       for (var x = base_ms_spring; x < base_ms_spring + 1000 * 60 * 120; x += 1000) {
  91         dst_data_spring.push([new Date(x), x]);
  92       }
  93
  94       g4 = new Dygraph(
  95           document.getElementById("chart4"),
  96           dst_data_spring,
  97           { width: 1024, labels: ['Date', 'Value'] }
  98       );
  99
 100     </script>
 101 </body>
 102 </html>