tests/highlighted-region.html

   1 <html>
   2   <head>
   3     <title>Highlighted Region</title>
   4     <!--[if IE]>
   5     <script type="text/javascript" src="excanvas.js"></script>
   6     <![endif]-->
   7     <script type="text/javascript" src="../strftime/strftime-min.js"></script>
   8     <script type="text/javascript" src="../rgbcolor/rgbcolor.js"></script>
   9     <script type="text/javascript" src="../dygraph-canvas.js"></script>
  10     <script type="text/javascript" src="../dygraph.js"></script>
  11     <script type="text/javascript" src="data.js"></script>
  12   </head>
  13   <body>
  14     <p>Should draw a time series with an unusual region highlighted:</p>
  15     <div id="div_g" style="width:600px; height:300px;"></div>
  16
  17     <p>When you zoom/pan, the region should remain highlighted.</p>
  18
  19     <script type="text/javascript">
  20       // A basic sinusoidal data series.
  21       var data = [];
  22       for (var i = 0; i < 1000; i++) {
  23         var base = 10 * Math.sin(i / 90.0);
  24         data.push([i, base, base + Math.sin(i / 2.0)]);
  25       }
  26
  27       // Shift one portion out of line.
  28       var highlight_start = 450;
  29       var highlight_end = 500;
  30       for (var i = highlight_start; i <= highlight_end; i++) {
  31         data[i][2] += 5.0;
  32       }
  33
  34
  35       new Dygraph(
  36           document.getElementById("div_g"),
  37           data,
  38           {
  39             labels: ['X', 'Est.', 'Actual'],
  40             underlayCallback: function(canvas, area, layout, g) {
  41               var bottom_left = g.toDomCoords(highlight_start, -20);
  42               var top_right = g.toDomCoords(highlight_end, +20);
  43
  44               var left = bottom_left[0];
  45               var right = top_right[0];
  46
  47               canvas.fillStyle = "rgba(255, 255, 102, 0.5)";
  48               canvas.fillRect(left, area.y, right - left, area.h);
  49             }
  50
  51           }
  52       );
  53     </script>
  54   </body>
  55 </html>