tests/daylight-savings.html

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