Example usage for com.google.gwt.maps.client.visualizationlib HeatMapLayer setData

Introduction

In this page you can find the example usage for com.google.gwt.maps.client.visualizationlib HeatMapLayer setData.

Prototype

public final native void setData(MVCArray<LatLng> dataPoints);

Source Link

Document

Sets the data points to be displayed by this heatmap.
NOTE: To clear the map points, set equal to an empty array.

Usage

From source file:com.google.gwt.maps.testing.client.maps.HeatMapLayerWidget.java

License:Apache License

private void drawMap() {
    // zoom out for the clouds
    LatLng center = LatLng.newInstance(40.74, -73.94);
    MapOptions opts = MapOptions.newInstance();
    opts.setZoom(11);/*from  w  w  w.ja  va2 s .c om*/
    opts.setCenter(center);
    opts.setMapTypeId(MapTypeId.TERRAIN);

    mapWidget = new MapWidget(opts);
    pWidget.add(mapWidget);
    mapWidget.setSize("750px", "500px");

    // show transit layer
    TransitLayer transitLayer = TransitLayer.newInstance();
    transitLayer.setMap(mapWidget);

    // create layer
    HeatMapLayerOptions options = HeatMapLayerOptions.newInstance();
    options.setOpacity(0.9);
    options.setRadius(5);
    options.setGradient(getSampleGradient());
    options.setMaxIntensity(3);
    options.setMap(mapWidget);

    HeatMapLayer heatMapLayer = HeatMapLayer.newInstance(options);
    // set data
    JsArray<LatLng> dataPoints = getSampleData();
    heatMapLayer.setData(dataPoints);

    // the other way to set data
    // note JS array can be set from this method, but only MVCArray from the
    // options setData() method
    // MVCArray<WeightedLocation> weightedDataPoints =
    // MVCArray.newInstance(getSampleWeightedData());
    // heatMapLayer.setDataWeighted(weightedDataPoints);
    GWT.log("Plotting " + dataPoints.length() + " points on HeatMap");
}

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