source: josm/src/org/openstreetmap/josm/gui/dialogs/LayerListPopup.java@ 79

package org.openstreetmap.josm.gui.dialogs;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JColorChooser;
import javax.swing.JList;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPopupMenu;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.actions.GpxExportAction;
import org.openstreetmap.josm.actions.SaveAction;
import org.openstreetmap.josm.gui.layer.Layer;
import org.openstreetmap.josm.gui.layer.OsmDataLayer;
import org.openstreetmap.josm.gui.layer.RawGpsDataLayer;
import org.openstreetmap.josm.gui.layer.WmsServerLayer;
import org.openstreetmap.josm.tools.ColorHelper;
import org.openstreetmap.josm.tools.ImageProvider;

/**
 * Popup menu handler for the layer list.
 */
public class LayerListPopup extends JPopupMenu {

        public LayerListPopup(final JList layers, final Layer layer) {
        add(new LayerList.ShowHideLayerAction(layers, layer));
        add(new LayerList.DeleteLayerAction(layers, layer));
        addSeparator();
        
                if (layer instanceof OsmDataLayer)
                        add(new JMenuItem(new SaveAction()));

        if (!(layer instanceof WmsServerLayer))
            add(new JMenuItem(new GpxExportAction(layer)));

                if (layer instanceof RawGpsDataLayer) {
                        JMenuItem color = new JMenuItem("Customize Color", ImageProvider.get("colorchooser"));
                        color.addActionListener(new ActionListener(){
                                public void actionPerformed(ActionEvent e) {
                                        String col = Main.pref.get("color.layer "+layer.name, Main.pref.get("color.gps point", ColorHelper.color2html(Color.gray)));
                                        JColorChooser c = new JColorChooser(ColorHelper.html2color(col));
                                        Object[] options = new Object[]{"OK", "Cancel", "Default"};
                                        int answer = JOptionPane.showOptionDialog(Main.main, c, "Choose a color", JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE, null, options, options[0]);
                                        switch (answer) {
                                        case 0:
                                                Main.pref.put("color.layer "+layer.name, ColorHelper.color2html(c.getColor()));
                                                break;
                                        case 1:
                                                return;
                                        case 2:
                                                Main.pref.put("color.layer "+layer.name, null);
                                                break;
                                        }
                                        Main.main.repaint();
                                }
                        });
                        add(color);
                }

        if (!(layer instanceof WmsServerLayer))
            addSeparator();

                JMenuItem info = new JMenuItem("Info", ImageProvider.get("info"));
                info.addActionListener(new ActionListener(){
                        public void actionPerformed(ActionEvent e) {
                                JOptionPane.showMessageDialog(Main.main, layer.getInfoComponent());
                        }
                });
                add(info);
        }
}