001// License: GPL. For details, see LICENSE file.
002package org.openstreetmap.josm.gui.preferences.projection;
003
004import java.awt.event.ActionListener;
005import java.util.Collection;
006import java.util.Collections;
007
008import javax.swing.JPanel;
009
010/**
011 * ProjectionChoice, that offers just one projection as choice.
012 *
013 * The GUI is an empty panel.
014 */
015public class SingleProjectionChoice extends AbstractProjectionChoice {
016
017    protected String code;
018
019    /**
020     * Constructs a new {@code SingleProjectionChoice}.
021     *
022     * @param name short name of the projection choice as shown in the GUI
023     * @param id unique identifier for the projection choice, e.g. "core:thisproj"
024     * @param code the unique identifier for the projection, e.g. "EPSG:1234"
025     */
026    public SingleProjectionChoice(String name, String id, String code) {
027        super(name, id);
028        this.code = code;
029    }
030
031    @Override
032    public JPanel getPreferencePanel(ActionListener listener) {
033        return new JPanel();
034    }
035
036    @Override
037    public String[] allCodes() {
038        return new String[] {code};
039    }
040
041    @Override
042    public void setPreferences(Collection<String> args) {
043        // Do nothing
044    }
045
046    @Override
047    public Collection<String> getPreferences(JPanel p) {
048        return Collections.emptyList();
049    }
050
051    @Override
052    public Collection<String> getPreferencesFromCode(String code) {
053        if (code.equals(this.code))
054            return Collections.emptyList();
055        else
056            return null;
057    }
058
059    @Override
060    public String getCurrentCode() {
061        return code;
062    }
063
064    @Override
065    public String getProjectionName() {
066        return name; // the same name as the projection choice
067    }
068
069}