Hello all,
I'm using geotools v14.3 to load a shapefile (Java Swing application). I
want to allow the customers to use the mouse to click on the map area to
draw new points, lines and polygons. First, I'm testing the points. So, a
customer should be able to draw a point on the clicked location.
*My current approach*
After following few articles, I first capture the clicked mouse location
with a mapmouselistener.
@Override
public void onMouseClicked(MapMouseEvent ev) {
System.out.println("mouse clicked : " + ev.getWorldPos());
DirectPosition2D p = ev.getWorldPos();
drawMyPoint(p.getX(), p.getY());
}
Point drawing function is as follows.
void drawMyPoint(double x, double y) {
SimpleFeatureTypeBuilder b = new SimpleFeatureTypeBuilder();
b.setName("MyFeatureType");
// set crs
b.setCRS(DefaultGeographicCRS.WGS84);
// add geometry
b.add("location", Point.class);
// build the type
final SimpleFeatureType TYPE = b.buildFeatureType();
// create features using the type defined
SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(TYPE);
GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory();
com.vividsolutions.jts.geom.Point point =
geometryFactory.createPoint(new Coordinate(x, y));
featureBuilder.add(point);
SimpleFeature feature = featureBuilder.buildFeature("FeaturePoint");
DefaultFeatureCollection featureCollection = new
DefaultFeatureCollection("internal", TYPE);
featureCollection.add(feature); //Add feature 1
// Add feature 2, 3, etc
Style style = SLD.createPointStyle("Star", Color.BLUE,
Color.BLUE, 0.3f, 15);
Layer layer = new FeatureLayer(featureCollection, style);
layer.setTitle("NewPoint");
map.addLayer(layer);
mapPane.repaint();
}
*Problem*
I can see the layer name being added to the map layer table. But the point
is not visible on the map.
I would be thankful for any insights.
Thank you.
--
regards,
*Thilina Yapa Bandara*
(*ආයුබෝවන් *- May All Beings Live Long)
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