1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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2 | package org.openstreetmap.josm.actions;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 | import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
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6 |
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7 | import java.awt.event.ActionEvent;
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8 | import java.awt.event.KeyEvent;
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9 | import java.util.Collection;
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10 | import java.util.HashSet;
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11 | import java.util.LinkedList;
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12 |
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13 | import javax.swing.JOptionPane;
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14 |
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15 | import org.openstreetmap.josm.Main;
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16 | import org.openstreetmap.josm.command.Command;
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17 | import org.openstreetmap.josm.command.MoveCommand;
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18 | import org.openstreetmap.josm.command.SequenceCommand;
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19 | import org.openstreetmap.josm.data.osm.Node;
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20 | import org.openstreetmap.josm.data.osm.OsmPrimitive;
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21 | import org.openstreetmap.josm.data.osm.Way;
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22 | import org.openstreetmap.josm.tools.Shortcut;
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23 |
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24 | /**
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25 | * Mirror the selected nodes or ways along the vertical axis
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26 | *
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27 | * Note: If a ways are selected, their nodes are mirrored
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28 | *
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29 | * @author Teemu Koskinen, based on much copy&Paste from other Actions.
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30 | */
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31 | public final class MirrorAction extends JosmAction {
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32 |
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33 | public MirrorAction() {
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34 | super(tr("Mirror"), "mirror", tr("Mirror selected nodes and ways."),
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35 | Shortcut.registerShortcut("tools:mirror", tr("Tool: {0}", tr("Mirror")),
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36 | KeyEvent.VK_M, Shortcut.SHIFT), true);
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37 | putValue("help", ht("/Action/Mirror"));
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38 | }
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39 |
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40 | public void actionPerformed(ActionEvent e) {
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41 | Collection<OsmPrimitive> sel = getCurrentDataSet().getSelected();
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42 | HashSet<Node> nodes = new HashSet<Node>();
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43 |
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44 | for (OsmPrimitive osm : sel) {
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45 | if (osm instanceof Node) {
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46 | nodes.add((Node)osm);
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47 | } else if (osm instanceof Way) {
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48 | nodes.addAll(((Way)osm).getNodes());
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49 | }
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50 | }
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51 |
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52 | if (nodes.size() == 0) {
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53 | JOptionPane.showMessageDialog(
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54 | Main.parent,
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55 | tr("Please select at least one node or way."),
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56 | tr("Information"),
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57 | JOptionPane.INFORMATION_MESSAGE
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58 | );
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59 | return;
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60 | }
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61 |
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62 | double minEast = 20000000000.0;
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63 | double maxEast = -20000000000.0;
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64 | for (Node n : nodes) {
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65 | double east = n.getEastNorth().east();
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66 | minEast = Math.min(minEast, east);
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67 | maxEast = Math.max(maxEast, east);
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68 | }
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69 | double middle = (minEast + maxEast) / 2;
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70 |
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71 | Collection<Command> cmds = new LinkedList<Command>();
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72 |
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73 | for (Node n : nodes) {
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74 | cmds.add(new MoveCommand(n, 2 * (middle - n.getEastNorth().east()), 0.0));
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75 | }
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76 |
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77 | Main.main.undoRedo.add(new SequenceCommand(tr("Mirror"), cmds));
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78 | Main.map.repaint();
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79 | }
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80 |
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81 | @Override
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82 | protected void updateEnabledState() {
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83 | if (getCurrentDataSet() == null) {
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84 | setEnabled(false);
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85 | } else {
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86 | updateEnabledState(getCurrentDataSet().getSelected());
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87 | }
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88 | }
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89 |
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90 | @Override
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91 | protected void updateEnabledState(Collection<? extends OsmPrimitive> selection) {
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92 | setEnabled(selection != null && !selection.isEmpty());
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93 | }
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94 | }
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