Module: IRuby::Output::HTML::Gmaps

Defined in:
lib/iruby/output/html.rb

Class Method Summary collapse

Class Method Details

.heatmap(o) ⇒ Object 



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# File 'lib/iruby/output/html.rb', line 80

def self.heatmap(o)
  data = o.delete(:points)
  raise "Missing :points parameter" if not data

  points = points2latlng(data)
  zoom = o.delete(:zoom)
  center = o.delete(:center)
  map_type = o.delete(:map_type)
r = <<E
<div id='map-canvas' style='width: 500px; height: 500px;'></div>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=false&libraries=visualization&callback=initialize"></script>

<script>
  function initialize() {
    var points = #{points};
    var latlngbounds = new google.maps.LatLngBounds();
    var zoom = #{zoom.to_json};
    var center = #{center.to_json};
    var map_type = #{map_type.to_json} || google.maps.MapTypeId.SATELLITE;

    var mapOptions = { 
      mapTypeId: map_type
    };

    if (zoom){
      mapOptions.zoom = zoom
    }
    if (center){
      mapOptions.center = new google.maps.LatLng(center.lat, center.lon)
    }

    map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);

    if (! zoom){
      for (var i = 0; i < points.length; i++) {
latlngbounds.extend(points[i].location);
     }
     map.fitBounds(latlngbounds);
    }


    var pointArray = new google.maps.MVCArray(points);

    heatmap = new google.maps.visualization.HeatmapLayer({
      data: pointArray
    });

    heatmap.setMap(map);
  }
  console.log("finished pre- init!")
</script>
E
STDERR.write("#{r}\n\n")
r
end

.points2latlng(points) ⇒ Object 



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# File 'lib/iruby/output/html.rb', line 75

def self.points2latlng(points)
  "[" + points.reject{|p| not p.lat or not p.lon}.map{|p| 
    "  {location: new google.maps.LatLng(#{p.lat.to_f}, #{p.lon.to_f}) #{", weight: #{p.weight.to_i}" if p.respond_to?(:weight) and p.weight} } "
  }.join(',') + "]"
end