tests/highlighted-region.html

   1 <!DOCTYPE html>
   2 <html>
   3   <head>
   4     <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7; IE=EmulateIE9">
   5     <title>Highlighted Region</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     <script type="text/javascript" src="data.js"></script>
  16   </head>
  17   <body>
  18     <p>Should draw a time series with an unusual region highlighted:</p>
  19     <div id="div_g" style="width:600px; height:300px;"></div>
  20
  21     <p>When you zoom/pan, the region should remain highlighted.</p>
  22
  23     <script type="text/javascript">
  24       // A basic sinusoidal data series.
  25       var data = [];
  26       for (var i = 0; i < 1000; i++) {
  27         var base = 10 * Math.sin(i / 90.0);
  28         data.push([i, base, base + Math.sin(i / 2.0)]);
  29       }
  30
  31       // Shift one portion out of line.
  32       var highlight_start = 450;
  33       var highlight_end = 500;
  34       for (var i = highlight_start; i <= highlight_end; i++) {
  35         data[i][2] += 5.0;
  36       }
  37
  38
  39       new Dygraph(
  40           document.getElementById("div_g"),
  41           data,
  42           {
  43             labels: ['X', 'Est.', 'Actual'],
  44             underlayCallback: function(canvas, area, g) {
  45               var bottom_left = g.toDomCoords(highlight_start, -20);
  46               var top_right = g.toDomCoords(highlight_end, +20);
  47
  48               var left = bottom_left[0];
  49               var right = top_right[0];
  50
  51               canvas.fillStyle = "rgba(255, 255, 102, 1.0)";
  52               canvas.fillRect(left, area.y, right - left, area.h);
  53             }
  54
  55           }
  56       );
  57     </script>
  58   </body>
  59 </html>