source: josm/src/org/openstreetmap/josm/gui/preferences/AnnotationPresetPreference.java@ 178

package org.openstreetmap.josm.gui.preferences;

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

import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Collection;
import java.util.StringTokenizer;

import javax.swing.Box;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.gui.annotation.AnnotationPreset;
import org.openstreetmap.josm.tools.GBC;

public class AnnotationPresetPreference implements PreferenceSetting {

        public static Collection<AnnotationPreset> annotationPresets;
        private JList annotationSources;

        public void addGui(final PreferenceDialog gui) {
                annotationSources = new JList(new DefaultListModel());
                String annos = Main.pref.get("annotation.sources");
                StringTokenizer st = new StringTokenizer(annos, ";");
                while (st.hasMoreTokens())
                        ((DefaultListModel)annotationSources.getModel()).addElement(st.nextToken());

                JButton addAnno = new JButton(tr("Add"));
                addAnno.addActionListener(new ActionListener(){
                        public void actionPerformed(ActionEvent e) {
                                String source = JOptionPane.showInputDialog(Main.parent, tr("Annotation preset source"));
                                if (source == null)
                                        return;
                                ((DefaultListModel)annotationSources.getModel()).addElement(source);
                                gui.requiresRestart = true;
                        }
                });

                JButton editAnno = new JButton(tr("Edit"));
                editAnno.addActionListener(new ActionListener(){
                        public void actionPerformed(ActionEvent e) {
                                if (annotationSources.getSelectedIndex() == -1)
                                        JOptionPane.showMessageDialog(Main.parent, tr("Please select the row to edit."));
                                else {
                                        String source = JOptionPane.showInputDialog(Main.parent, tr("Annotation preset source"), annotationSources.getSelectedValue());
                                        if (source == null)
                                                return;
                                        ((DefaultListModel)annotationSources.getModel()).setElementAt(source, annotationSources.getSelectedIndex());
                                        gui.requiresRestart = true;
                                }
                        }
                });

                JButton deleteAnno = new JButton(tr("Delete"));
                deleteAnno.addActionListener(new ActionListener(){
                        public void actionPerformed(ActionEvent e) {
                                if (annotationSources.getSelectedIndex() == -1)
                                        JOptionPane.showMessageDialog(Main.parent, tr("Please select the row to delete."));
                                else {
                                        ((DefaultListModel)annotationSources.getModel()).remove(annotationSources.getSelectedIndex());
                                        gui.requiresRestart = true;
                                }
                        }
                });
                annotationSources.setVisibleRowCount(3);

                annotationSources.setToolTipText(tr("The sources (url or filename) of annotation preset definition files. See http://josm.eigenheimstrasse.de/wiki/AnnotationPresets for help."));
                addAnno.setToolTipText(tr("Add a new annotation preset source to the list."));
                deleteAnno.setToolTipText(tr("Delete the selected source from the list."));

                gui.map.add(new JLabel(tr("Annotation preset sources")), GBC.eol().insets(0,5,0,0));
                gui.map.add(new JScrollPane(annotationSources), GBC.eol().fill(GBC.BOTH));
                JPanel buttonPanel = new JPanel(new GridBagLayout());
                gui.map.add(buttonPanel, GBC.eol().fill(GBC.HORIZONTAL));
                buttonPanel.add(Box.createHorizontalGlue(), GBC.std().fill(GBC.HORIZONTAL));
                buttonPanel.add(addAnno, GBC.std().insets(0,5,0,0));
                buttonPanel.add(editAnno, GBC.std().insets(5,5,5,0));
                buttonPanel.add(deleteAnno, GBC.std().insets(0,5,0,0));
        }

        public void ok() {
                if (annotationSources.getModel().getSize() > 0) {
                        StringBuilder sb = new StringBuilder();
                        for (int i = 0; i < annotationSources.getModel().getSize(); ++i)
                                sb.append(";"+annotationSources.getModel().getElementAt(i));
                        Main.pref.put("annotation.sources", sb.toString().substring(1));
                } else
                        Main.pref.put("annotation.sources", null);
        }

        /** 
         * Initialize the annotation presets (load and may display error)
         */
        public static void initialize() {
                annotationPresets = AnnotationPreset.readFromPreferences();
        }
}