blah2/html/plot.js

var timestamp = -1;
var nRows = 3;
var nCols = 3;
var host = window.location.hostname;

var isLocalHost = (host === "localhost" || host === "127.0.0.1" || host === "192.168.0.112");

var urlMap = ''
if (isLocalHost) {
  urlMap = '//' + host + ':3000/map?timestamp=' + Date.now();
} else {
  urlMap = '//' + host + '/api/map?timestamp=' + Date.now();
}

var data = [
  {
    z: [[0, 0, 0], [0, 0, 0], [0, 0, 0]],
    colorscale: 'Jet',
    type: 'heatmap'
  }
];

var layout = {
  autosize: false,
  margin: {
    l: 50,
    r: 50,
    b: 50,
    t: 50,
    pad: 0
  },
  width: document.getElementById('ddmap').offsetWidth,
  height: document.getElementById('ddmap').offsetHeight,
  plot_bgcolor: "rgba(0,0,0,0)",
  paper_bgcolor: "rgba(0,0,0,0)",
  annotations: [],
  coloraxis: {
    cmin: 0,
    cmax: 1
  },
  displayModeBar: false,
  xaxis: {
    ticks: '',
    side: 'bottom'
  },
  yaxis: {
    ticks: '',
    ticksuffix: ' ',
    autosize: false
  }
};

var config = {
  displayModeBar: false,
  responsive: true
}

Plotly.newPlot('ddmap', data, layout, config);

var intervalId = window.setInterval(function () {
  var apiData = $.getJSON(urlMap, function () { })

    .done(function (data) {

      // case draw new plot
      if (data.nRows != nRows || data.nCols != nCols) {
        nRows = data.nRows;
        nCols = data.nCols;

        data = [
          {
            z: data.data,
            x: data.delay,
            y: data.doppler,
            colorscale: 'Jet',
            zauto: false,
            zmin: 0,
            zmax: Math.max(13, data.maxPower),
            type: 'heatmap'
          }
        ];
        layout = {
          autosize: false,
          margin: {
            l: 50,
            r: 50,
            b: 50,
            t: 50,
            pad: 0
          },
          width: document.getElementById('ddmap').offsetWidth,
          height: document.getElementById('ddmap').offsetHeight,
          plot_bgcolor: "rgba(0,0,0,0)",
          paper_bgcolor: "rgba(0,0,0,0)",
          annotations: [],
          displayModeBar: false,
          xaxis: {
            ticks: '',
            side: 'bottom'
          },
          yaxis: {
            ticks: '',
            ticksuffix: ' ',
            autosize: false,
            categoryorder: "total descending"
          }
        };
        Plotly.newPlot('ddmap', data, layout, { displayModeBar: false });
      }
      else {
        data_update =
        {
          'z': [data.data],
          'zmax': Math.max(13, data.maxPower)
        };
        layout_update = {
        };
        Plotly.update('ddmap', data_update, layout_update, { displayModeBar: false });
      }

    })

    .fail(function () {
      console.log('API Fail');
    })

    .always(function () {

    });
}, 500);