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     * Constructor.
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     * @param cacheDir a cache directory name
026     */
027    public SingleProjectionChoice(String name, String id, String code, String cacheDir) {
028        super(name, id, cacheDir);
029        this.code = code;
030    }
031
032    public SingleProjectionChoice(String name, String id, String code) {
033        super(name, id);
034        this.code = code;
035    }
036
037    @Override
038    public JPanel getPreferencePanel(ActionListener listener) {
039        return new JPanel();
040    }
041
042    @Override
043    public String[] allCodes() {
044        return new String[] { code };
045    }
046
047    @Override
048    public void setPreferences(Collection<String> args) {
049    }
050
051    @Override
052    public Collection<String> getPreferences(JPanel p) {
053        return Collections.emptyList();
054    }
055
056    @Override
057    public String toString() {
058        return name;
059    }
060
061    @Override
062    public Collection<String> getPreferencesFromCode(String code) {
063        if (code.equals(this.code))
064            return Collections.emptyList();
065        else
066            return null;
067    }
068
069    @Override
070    public String getCurrentCode() {
071        return code;
072    }
073
074    @Override
075    public String getProjectionName() {
076        return name; // the same name as the projection choice
077    }
078
079}