plot-manager/index10.html at d037e84ecc71ff06bbab6a0c45206a10d0137a55 · BodyTrack/plot-manager · GitHub

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<!DOCTYPE html>
<html>
<head>
   <meta charset="utf-8">
   <title>Plot Manager</title>
   <link href="css/main.css" rel="stylesheet" type="text/css"/>
   <style type="text/css">
      .date_axis {
         height: 42px;
         z-index: 2;
         border: 1px solid black;
         border-bottom-width: 0;
      }

      .plot_container {
         position: relative;
         border: 1px solid black;
      }

      .plot_container > canvas:focus {
         outline: none;
      }

      .y_axis {
         position: relative;
         width: 42px;
         border: 1px solid black;
         border-left-width: 0;
      }

      .data_point_table {
         display: table;
         margin-top: 5px;
      }

      .data_point_row {
         display: table-row;
      }

      .data_point_header_cell {
         font-weight: bold;
      }

      .data_point_cell {
         display: table-cell;
         padding-right: 20px;
      }
   </style>
   <script src="lib/jquery/jquery-1.11.2.min.js" type="text/javascript"></script>
   <script src="js/jquery.mousewheel.min.js"></script>
   <script src="lib/superagent/superagent.js" type="text/javascript"></script>
   <script src="js/grapher.min.js"></script>
   <script src="js/org/bodytrack/grapher/PlotManager.js" type="text/javascript"></script>
   <script type="text/javascript">
      var ESDR_API_ROOT_URL = 'https://esdr.cmucreatelab.org/api/v1';

      var feedIdOrApiKey = 4231;
      var channelName = "PM2_5";

      var hoverSampleValueAndTimeElement = null;
      var cursorSampleValueAndTimeElement = null;

      window.grapherLoad = function() {
         var maxTimeSecs = Date.now() / 1000;
         var minTimeSecs = maxTimeSecs - 7 * 24 * 60 * 60;

         var plotManager = new org.bodytrack.grapher.PlotManager("date_axis", minTimeSecs, maxTimeSecs);

         plotManager.setWillAutoResizeWidth(true, function() {
            return $(window).width()         // window width
                   - $(".y_axis").width()    // Y axis width
                   - 20                      // left and right margins
                   - 3;                      // grapher and Y axis borders
         });

         var datasource = function(level, offset, successCallback) {
            superagent
                  .get(ESDR_API_ROOT_URL + "/feeds/" + feedIdOrApiKey + "/channels/" + channelName + "/tiles/" + level + "." + offset)
                  .end(function(err, res) {
                          if (err) {
                             return console.log("Error: " + res.body);
                          }

                          switch (res.status) {
                             case 200:
                                return successCallback(JSON.stringify(res.body.data));
                             case 401:
                                return console.log("Unauthorized");
                             case 403:
                                return console.log("Forbidden");
                             default:
                                return console.log("Error: " + res.body);
                          }
                       });
         };

         var datasource = ESDR_API_ROOT_URL + "/feeds/" + feedIdOrApiKey + "/channels/" + channelName + "/tiles";
         var minValue = 0;
         var maxValue = 20;

         // add the plot
         plotManager.addDataSeriesPlot("my_plot", datasource, "plot_container", "y_axis", minValue, maxValue);

         // save references to commonly used objects
         var plot = plotManager.getPlotContainer("plot_container").getPlot("my_plot");
         hoverSampleValueAndTimeElement = $("#hover_sample_value_and_time");
         cursorSampleValueAndTimeElement = $("#cursor_sample_value_and_time");

         // Set the default cursor position to the middle of the date axis, then set a timer to fetch the cursor
         // value--we need the timer because the plot data loads asynchronously.  There's a race condition here, because
         // the plot data may not be loaded by the time the timer fires, but, whatever, this is good enough for an
         // example.
         var initialCursorTime = (maxTimeSecs + minTimeSecs) / 2;
         plotManager.getDateAxis().setCursorPosition(initialCursorTime);
         setTimeout(function() {
            displayCursorTimeAndValue(plot, initialCursorTime);
         }, 500);

         // Remember the current cursor position so we don't need to do a lot of needless calls to
         // getClosestDataPointToTimeWithinWindow() when the axis is panned/zoomed, but the cursor position hasn't
         // actually changed.
         var currentCursorPosition = null;

         // define the axisChangeListener
         var axisChangeListener = function(evt) {
            if (evt) {
               var cursorPosition = evt['cursorPosition'];

               // don't do anything if the cursor position hasn't changed (e.g. the user is zooming/panning the axis)
               if (currentCursorPosition != cursorPosition) {
                  currentCursorPosition = cursorPosition;
                  displayCursorTimeAndValue(plot, cursorPosition);
               }
            }
            else {
               cursorSampleValueAndTimeElement.empty().hide();
            }
         };

         // add a listener to the date axis so we can get the current cursor position when the user moves the cursor
         plotManager.getDateAxis().addAxisChangeListener(axisChangeListener);

         // add the data point listener to handle mouse hover events
         plot.addDataPointListener(function(dataPoint) {
            renderValueAndTimeInElement(dataPoint, hoverSampleValueAndTimeElement);
         });

         // configure checkbox
         $("#is_listener_attached").click(function() {
            if ($(this).prop("checked")) {
               displayCursorTimeAndValue(plot, plotManager.getDateAxis().getCursorPosition());
               plotManager.getDateAxis().addAxisChangeListener(axisChangeListener);
            }
            else {
               $("#cursor_sample_value_and_time").html("listener not attached").show();
               plotManager.getDateAxis().removeAxisChangeListener(axisChangeListener);
            }
         });
      };

      function displayCursorTimeAndValue(plot, timeInSecs) {
         // I'm using a window of [timeInSecs - 3600, timeInSecs + 0] here because I know that the data samples are
         // recorded every hour (3600 seconds), and I want the closest data point *before* the given timeInSecs.
         var dataPoint = plot.getClosestDataPointToTimeWithinWindow(timeInSecs, 3600, 0);
         renderValueAndTimeInElement(dataPoint, cursorSampleValueAndTimeElement);
      }

      function renderValueAndTimeInElement(dataPoint, element) {
         if (dataPoint) {
            element.html(dataPoint.valueString + " &mu;g/m<sup>3</sup> at " + dataPoint.dateString).show();
         }
         else {
            element.empty().hide();
         }
      }
   </script>
</head>
<body>
<p>
   An auto-resizing plot which has two listeners attached. Hover over the plot data points to see the value and
   timestamp appear below the plot. Drag the red triangle cursor to see the value and timestamp of the most recent
   data point with respect to the cursor. You can toggle whether the cursor listener is attached by toggling the checkbox.
</p>
<div id="grapher_container" class="noselect">
   <table id="grapher" border="0" cellpadding="0" cellspacing="0">
      <tr>
         <td>
            <div id="date_axis" class="date_axis" style="width:400px;"></div>
         </td>
         <td></td>
      </tr>
      <tr>
         <td>
            <div id="plot_container" class="plot_container" style="width:400px;height:300px;"></div>
         </td>
         <td>
            <div id="y_axis" class="y_axis" style="height:300px"></div>
         </td>
      </tr>
      <tr>
         <td colspan="2">
            <div style="float:right; margin-top:5px">
               <input type="checkbox" id="is_listener_attached" value="true" checked="checked"><label for="is_listener_attached">Is cursor listener attached?</label>
            </div>
            <div class="data_point_table">
               <div class="data_point_row">
                  <div class="data_point_cell data_point_header_cell">Cursor</div>
                  <div class="data_point_cell data_point_header_cell">Hover</div>
               </div>
               <div class="data_point_row">
                  <div class="data_point_cell" id="cursor_sample_value_and_time"></div>
                  <div class="data_point_cell" id="hover_sample_value_and_time"></div>
               </div>
            </div>
         </td>
      </tr>
   </table>
</div>
</body>
</html>