source: josm/src/org/openstreetmap/josm/gui/dialogs/ConflictDialog.java@ 86

package org.openstreetmap.josm.gui.dialogs;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;

import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.command.ConflictResolveCommand;
import org.openstreetmap.josm.data.SelectionChangedListener;
import org.openstreetmap.josm.data.osm.Node;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.Segment;
import org.openstreetmap.josm.data.osm.Way;
import org.openstreetmap.josm.data.osm.visitor.SimplePaintVisitor;
import org.openstreetmap.josm.data.osm.visitor.Visitor;
import org.openstreetmap.josm.gui.ConflictResolver;
import org.openstreetmap.josm.gui.MapView;
import org.openstreetmap.josm.gui.NavigatableComponent;
import org.openstreetmap.josm.gui.OsmPrimitivRenderer;
import org.openstreetmap.josm.tools.ImageProvider;

public final class ConflictDialog extends ToggleDialog {

        public final Map<OsmPrimitive, OsmPrimitive> conflicts = new HashMap<OsmPrimitive, OsmPrimitive>();
        public final DefaultListModel model = new DefaultListModel();
        private final JList displaylist = new JList(model);

        public ConflictDialog() {
                super("Conflict", "Conflict Dialog", "merge", "Merging conflicts.", "C", KeyEvent.VK_C, "conflict");
                displaylist.setCellRenderer(new OsmPrimitivRenderer());
                displaylist.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
                displaylist.addMouseListener(new MouseAdapter(){
                        @Override public void mouseClicked(MouseEvent e) {
                                if (e.getClickCount() >= 2)
                                        resolve();
                        }
                });
                add(new JScrollPane(displaylist), BorderLayout.CENTER);

                JPanel buttonPanel = new JPanel(new GridLayout(1,2));
                JButton button = new JButton("Resolve", ImageProvider.get("dialogs", "merge"));
                button.setToolTipText("Open a merge dialog of all selected items in the list above.");
                button.addActionListener(new ActionListener(){
                        public void actionPerformed(ActionEvent e) {
                                resolve();
                        }
                });
                buttonPanel.add(button);

                button = new JButton("Select", ImageProvider.get("mapmode", "selection"));
                button.setToolTipText("Set the selected elements on the map to the selected items in the list above.");
                button.addActionListener(new ActionListener(){
                        public void actionPerformed(ActionEvent e) {
                                Collection<OsmPrimitive> sel = new LinkedList<OsmPrimitive>();
                                for (Object o : displaylist.getSelectedValues())
                                        sel.add((OsmPrimitive)o);
                                Main.ds.setSelected(sel);
                        }
                });
                buttonPanel.add(button);

                add(buttonPanel, BorderLayout.SOUTH);

                Main.ds.addSelectionChangedListener(new SelectionChangedListener(){
                        public void selectionChanged(Collection<OsmPrimitive> newSelection) {
                                displaylist.clearSelection();
                                for (OsmPrimitive osm : newSelection) {
                                        if (conflicts.containsKey(osm)) {
                                                int pos = model.indexOf(osm);
                                                displaylist.addSelectionInterval(pos, pos);
                                        }
                                }
                        }
                });
                displaylist.getSelectionModel().addListSelectionListener(new ListSelectionListener(){
                        public void valueChanged(ListSelectionEvent e) {
                                Main.main.getMapFrame().mapView.repaint();
                        }
                });
        }

        private final void resolve() {
                if (displaylist.getSelectedIndex() == -1) {
                        JOptionPane.showMessageDialog(Main.main, "Please select something from the conflict list.");
                        return;
                }
                Map<OsmPrimitive, OsmPrimitive> sel = new HashMap<OsmPrimitive, OsmPrimitive>();
                for (int i : displaylist.getSelectedIndices()) {
                        OsmPrimitive s = (OsmPrimitive)model.get(i);
                        sel.put(s, conflicts.get(s));
                }
                ConflictResolver resolver = new ConflictResolver(sel);
                int answer = JOptionPane.showConfirmDialog(Main.main, resolver, "Resolve Conflicts", JOptionPane.OK_CANCEL_OPTION);
                if (answer != JOptionPane.OK_OPTION)
                        return;
                MapView mv = Main.main.getMapFrame().mapView;
                mv.editLayer().add(new ConflictResolveCommand(resolver.conflicts, sel));
                mv.repaint();
        }

        public final void add(Map<OsmPrimitive, OsmPrimitive> conflicts) {
                this.conflicts.putAll(conflicts);
                model.removeAllElements();
                for (OsmPrimitive osm : this.conflicts.keySet())
                        model.addElement(osm);
        }

        /**
         * Paint all conflicts that can be expressed on the main window. 
         */
        public void paintConflicts(final Graphics g, final NavigatableComponent nc) {
                Color preferencesColor = SimplePaintVisitor.getPreferencesColor("conflict", Color.GRAY);
                if (preferencesColor.equals(Color.BLACK))
                        return;
                g.setColor(preferencesColor);
                Visitor conflictPainter = new Visitor(){
                        public void visit(Node n) {
                                Point p = nc.getPoint(n.eastNorth);
                                g.drawRect(p.x-1, p.y-1, 2, 2);
                        }
                        public void visit(Segment ls) {
                                if (ls.incomplete)
                                        return;
                                Point p1 = nc.getPoint(ls.from.eastNorth);
                                Point p2 = nc.getPoint(ls.to.eastNorth);
                                g.drawLine(p1.x, p1.y, p2.x, p2.y);
                        }
                        public void visit(Way w) {
                                for (Segment ls : w.segments)
                                        visit(ls);
                        }
                };
                for (Object o : displaylist.getSelectedValues())
                        conflicts.get(o).visit(conflictPainter);
        }
}