tests/highlighted-region.html

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