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[SEDONA-264] zeppelin helium plugin supports drawing geometry like linestring, polygon #801

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merged 1 commit into from
Mar 18, 2023
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[SEDONA-264] zeppelin helium plugin supports drawing geometry like linestring, polygon #801

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29 changes: 23 additions & 6 deletions zeppelin/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,7 @@ export default class LeafletMap extends Visualization {
];

this.transformation = new ColumnselectorTransformation(config, columnSpec);
this.chartInstance = L.map(this.getChartElementId());
this.chartInstance = this.createMap();
}

getTransformation() {
Expand All @@ -68,11 +68,16 @@ export default class LeafletMap extends Visualization {
super.setConfig(config);
this.transformation.setConfig(config);
if (!this.chartInstance) {
this.chartInstance = L.map(this.getChartElementId());
this.chartInstance = this.createMap();
}
return this.chartInstance;
};

createMap() {
// using canvas renderer to support drawing geometry like LineString, Polygon etc.
return L.map(this.getChartElementId(), {renderer: L.canvas()});
}

getChartElementId() {
return this.targetEl[0].id
};
Expand Down Expand Up @@ -109,21 +114,33 @@ export default class LeafletMap extends Visualization {
map.invalidateSize(true)

var imageBounds = null
const markers = chartDataModel.rows.map(
const markers = chartDataModel.rows.flatMap(
row => {
const {image, boundary, info} = row;
var markers = [];

// throw new Error(image);
var jsts = require("jsts");
// Read WKT string from Sedona
var reader = new jsts.io.WKTReader();
var obj = reader.read(boundary)
var obj = reader.read(boundary);
// Collect the centroid point of the input geometry
var centroid = obj.getCentroid()
var marker = L.marker([centroid.getY(), centroid.getX()]);
const mapMarker = marker.addTo(map);
markers.push(marker);

if (obj.getGeometryType() !== 'Point') {
var writer = new jsts.io.GeoJSONWriter();
var geojson = writer.write(obj);
marker = L.geoJSON(geojson);
marker.addTo(map);
markers.push(marker);
}

// Attach the marker information if exists
if(info){
mapMarker.bindTooltip(info)
mapMarker.bindTooltip(info);
}
// Overlay the generated image over the tile layer
if (image) {
Expand All @@ -133,7 +150,7 @@ export default class LeafletMap extends Visualization {
var imageUrl = 'data:image/png;base64,' + image;
L.imageOverlay(imageUrl, imageBounds).addTo(map);
}
return marker
return markers;
}
);
// Adjust the location of the viewport
Expand Down