source: josm/src/org/openstreetmap/josm/gui/download/BookmarkSelection.java@ 239

package org.openstreetmap.josm.gui.download;

import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.data.Preferences;
import org.openstreetmap.josm.data.coor.LatLon;
import org.openstreetmap.josm.gui.BookmarkList;
import org.openstreetmap.josm.tools.GBC;

/**
 * Bookmark selector.
 * 
 * Provides selection, creation and deletion of bookmarks.
 * Extracted from old DownloadAction.
 * 
 * @author Frederik Ramm <frederik@remote.org>
 *
 */
public class BookmarkSelection implements DownloadSelection {

        private Preferences.Bookmark tempBookmark= null;
        private BookmarkList bookmarks; 
        
        public void addGui(final DownloadDialog gui) {
                
                JPanel dlg = new JPanel(new GridBagLayout());
                gui.tabpane.addTab("Bookmarks", dlg);

                bookmarks = new BookmarkList();
                bookmarks.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
                        public void valueChanged(ListSelectionEvent e) {
                                Preferences.Bookmark b = (Preferences.Bookmark)bookmarks.getSelectedValue();
                                if (b != null) {
                                        gui.minlat = b.latlon[0];
                                        gui.minlon = b.latlon[1];
                                        gui.maxlat = b.latlon[2];
                                        gui.maxlon = b.latlon[3];
                                        gui.boundingBoxChanged(BookmarkSelection.this);
                                }
                        }
                });
                //wc.addListMarker(bookmarks);
                dlg.add(new JScrollPane(bookmarks), GBC.eol().fill());

                JPanel buttons = new JPanel(new GridLayout(1,2));
                JButton add = new JButton(tr("Add"));
                add.addActionListener(new ActionListener(){
                        public void actionPerformed(ActionEvent e) {
                                
                                if (tempBookmark == null) {
                                        JOptionPane.showMessageDialog(Main.parent, tr("Please enter the desired coordinates first."));
                                        return;
                                }
                                tempBookmark.name = JOptionPane.showInputDialog(Main.parent,tr("Please enter a name for the location."));
                                if (tempBookmark.name != null && !tempBookmark.name.equals("")) {
                                        ((DefaultListModel)bookmarks.getModel()).addElement(tempBookmark);
                                        bookmarks.save();
                                }
                        }
                });
                buttons.add(add);
                JButton remove = new JButton(tr("Remove"));
                remove.addActionListener(new ActionListener(){
                        public void actionPerformed(ActionEvent e) {
                                Object sel = bookmarks.getSelectedValue();
                                if (sel == null) {
                                        JOptionPane.showMessageDialog(Main.parent,tr("Select a bookmark first."));
                                        return;
                                }
                                ((DefaultListModel)bookmarks.getModel()).removeElement(sel);
                                bookmarks.save();
                        }
                });
                buttons.add(remove);
                dlg.add(buttons, GBC.eop().fill(GBC.HORIZONTAL));
        }               

        public void boundingBoxChanged(DownloadDialog gui) {
                tempBookmark = new Preferences.Bookmark();
                tempBookmark.latlon[0] = gui.minlat;
                tempBookmark.latlon[1] = gui.minlon;
                tempBookmark.latlon[2] = gui.maxlat;
                tempBookmark.latlon[3] = gui.maxlon;
                bookmarks.clearSelection();
        }


}