eu.limetri.client.mapviewer.swing.jxmap.map.AreaMeasurementContext Maven / Gradle / Ivy

Go to download
/**
 *  Copyright (C) 2008-2013 LimeTri. All rights reserved.
 *
 *  AgroSense is free software: you can redistribute it and/or modify it under
 *  the terms of the GNU General Public License as published by the Free Software
 *  Foundation, either version 3 of the License, or (at your option) any later
 *  version.
 *
 *  There are special exceptions to the terms and conditions of the GPLv3 as it
 *  is applied to this software, see the FLOSS License Exception
 *  .
 *
 *  AgroSense is distributed in the hope that it will be useful, but WITHOUT ANY
 *  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 *  A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with
 *  AgroSense. If not, see .
 */
package eu.limetri.client.mapviewer.swing.jxmap.map;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.CoordinateSequence;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.LinearRing;
import com.vividsolutions.jts.geom.Polygon;
import com.vividsolutions.jts.geom.impl.CoordinateArraySequence;
import eu.limetri.client.mapviewer.data.GeoPosition;
import eu.limetri.client.mapviewer.data.util.ScaleUtil;
import eu.limetri.client.mapviewer.swing.JXMapViewer;
import eu.limetri.client.mapviewer.swing.render.DrawingRenderer;
import eu.limetri.client.mapviewer.swing.render.PolygonDrawingRenderer;
import java.awt.BorderLayout;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import eu.agrosense.client.lib.geotools.GeometryTools;
import org.openide.util.NbBundle;

/**
 * Context for measuring the area of painted shape
 *
 * @author Frantisek Post
 */
@NbBundle.Messages({"area_measurement_result_format=Area of the selected shape is: %s",
    "area_measurement=Area measurement"})
public class AreaMeasurementContext extends AbstractMeasurementContext {

    protected final GeometryFactory geometryFactory = new GeometryFactory();
    
    
    public AreaMeasurementContext(JXMapViewer mapViewer) {
        super(mapViewer);
    }

    /**
     * Create a ring form the currently drawn line by adding a segment from the
     * last to the first point.
     *
     * @return
     */
    private LinearRing makeRing() {
        int len = coords.size() + 1;
        Coordinate[] coordArray = coords.toArray(new Coordinate[len]);
        coordArray[len - 1] = coordArray[0]; // close the ring
        CoordinateSequence coordSequence = new CoordinateArraySequence(coordArray);
        return new LinearRing(coordSequence, geometryFactory);
    }

    @Override
    public boolean canFinish() {
        // are there enough points to create a polygon?
        if (coords.size() < 3) {
            return false;
        }
        // check if closing the currently drawn line produces a valid ring:
        return makeRing().isValid();
    }

    @Override
    public DrawingRenderer getRenderer() {
        return new PolygonDrawingRenderer(coords);
    }

    @Override
    public String getDescription() {
        return Bundle.area_measurement();
    }

    @Override
    protected JComponent createResultComponent() {
        LinearRing ring = makeRing();
        Polygon polygon = new Polygon(ring, null, geometryFactory);
        double area = GeometryTools.getAreaInHA(polygon);
        
        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        JLabel label = new JLabel();
        label.setText(String.format(Bundle.area_measurement_result_format(), ScaleUtil.formatArea(area)));

        panel.add(label, BorderLayout.CENTER);
        panel.setBorder(new EmptyBorder(10, 10, 10, 10));
        return panel;    
    }

    @Override
    protected void addPointImpl(GeoPosition position) {
        Coordinate coord = new Coordinate(position.getLongitude(), position.getLatitude());
        coords.add(coord);
    }
}