[6380] | 1 | // License: GPL. For details, see LICENSE file.
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[626] | 2 | package org.openstreetmap.josm.actions;
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| 3 |
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[3810] | 4 | import static org.openstreetmap.josm.gui.help.HelpUtil.ht;
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[626] | 5 | import static org.openstreetmap.josm.tools.I18n.tr;
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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 |
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| 10 | import org.openstreetmap.josm.Main;
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[12630] | 11 | import org.openstreetmap.josm.gui.MainApplication;
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| 12 | import org.openstreetmap.josm.gui.MapFrame;
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[4908] | 13 | import org.openstreetmap.josm.gui.layer.OsmDataLayer;
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[1084] | 14 | import org.openstreetmap.josm.tools.Shortcut;
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[626] | 15 |
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| 16 | /**
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| 17 | * Undoes the last command.
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[1023] | 18 | *
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[626] | 19 | * @author imi
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| 20 | */
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[4908] | 21 | public class UndoAction extends JosmAction implements OsmDataLayer.CommandQueueListener {
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[626] | 22 |
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[1169] | 23 | /**
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| 24 | * Construct the action with "Undo" as label.
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| 25 | */
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| 26 | public UndoAction() {
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| 27 | super(tr("Undo"), "undo", tr("Undo the last action."),
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[4982] | 28 | Shortcut.registerShortcut("system:undo", tr("Edit: {0}", tr("Undo")), KeyEvent.VK_Z, Shortcut.CTRL), true);
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[1169] | 29 | setEnabled(false);
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[2323] | 30 | putValue("help", ht("/Action/Undo"));
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[1169] | 31 | }
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[626] | 32 |
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[6084] | 33 | @Override
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[1169] | 34 | public void actionPerformed(ActionEvent e) {
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[12630] | 35 | MapFrame map = MainApplication.getMap();
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| 36 | if (map == null)
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[1169] | 37 | return;
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[12630] | 38 | map.repaint();
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[12641] | 39 | MainApplication.undoRedo.undo();
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[1169] | 40 | }
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[1820] | 41 |
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| 42 | @Override
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| 43 | protected void updateEnabledState() {
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[12641] | 44 | setEnabled(Main.main != null && !MainApplication.undoRedo.commands.isEmpty());
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[1820] | 45 | }
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[3810] | 46 |
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[4908] | 47 | @Override
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| 48 | public void commandChanged(int queueSize, int redoSize) {
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[12641] | 49 | if (MainApplication.undoRedo.commands.isEmpty()) {
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[4908] | 50 | putValue(NAME, tr("Undo"));
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| 51 | setTooltip(tr("Undo the last action."));
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| 52 | } else {
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| 53 | putValue(NAME, tr("Undo ..."));
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| 54 | setTooltip(tr("Undo {0}",
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[12641] | 55 | MainApplication.undoRedo.commands.getLast().getDescriptionText()));
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[4908] | 56 | }
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| 57 | }
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[626] | 58 | }
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