1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.dialogs.layer;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.awt.Component;
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7 | import java.awt.event.ActionEvent;
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8 | import java.util.List;
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9 |
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10 | import javax.swing.AbstractAction;
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11 | import javax.swing.JMenuItem;
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12 |
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13 | import org.openstreetmap.josm.Main;
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14 | import org.openstreetmap.josm.gui.dialogs.IEnabledStateUpdating;
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15 | import org.openstreetmap.josm.gui.dialogs.LayerListDialog.LayerListModel;
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16 | import org.openstreetmap.josm.gui.help.HelpUtil;
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17 | import org.openstreetmap.josm.gui.layer.Layer;
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18 | import org.openstreetmap.josm.gui.layer.Layer.LayerAction;
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19 | import org.openstreetmap.josm.tools.ImageProvider;
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20 |
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21 | /**
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22 | * The action to delete the currently selected layer
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23 | */
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24 | public final class DeleteLayerAction extends AbstractAction implements IEnabledStateUpdating, LayerAction {
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25 |
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26 | private final LayerListModel model;
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27 |
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28 | /**
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29 | * Creates a {@link DeleteLayerAction} which will delete the currently selected layers in the layer dialog.
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30 | * @param model layer list model
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31 | */
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32 | public DeleteLayerAction(LayerListModel model) {
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33 | this.model = model;
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34 | new ImageProvider("dialogs", "delete").getResource().attachImageIcon(this, true);
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35 | putValue(SHORT_DESCRIPTION, tr("Delete the selected layers."));
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36 | putValue(NAME, tr("Delete"));
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37 | putValue("help", HelpUtil.ht("/Dialog/LayerList#DeleteLayer"));
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38 | updateEnabledState();
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39 | }
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40 |
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41 | @Override
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42 | public void actionPerformed(ActionEvent e) {
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43 | List<Layer> selectedLayers = model.getSelectedLayers();
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44 | if (selectedLayers.isEmpty())
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45 | return;
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46 | if (!Main.saveUnsavedModifications(selectedLayers, false))
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47 | return;
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48 | for (Layer l: selectedLayers) {
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49 | if (model.getLayerManager().containsLayer(l)) {
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50 | // it may happen that this call removes other layers.
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51 | // this is why we need to check if every layer is still in the list of selected layers.
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52 | model.getLayerManager().removeLayer(l);
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53 | }
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54 | }
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55 | }
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56 |
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57 | @Override
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58 | public void updateEnabledState() {
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59 | setEnabled(!model.getSelectedLayers().isEmpty());
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60 | }
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61 |
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62 | @Override
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63 | public Component createMenuComponent() {
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64 | return new JMenuItem(this);
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65 | }
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66 |
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67 | @Override
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68 | public boolean supportLayers(List<Layer> layers) {
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69 | return true;
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70 | }
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71 |
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72 | @Override
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73 | public boolean equals(Object obj) {
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74 | return obj instanceof DeleteLayerAction;
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75 | }
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76 |
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77 | @Override
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78 | public int hashCode() {
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79 | return getClass().hashCode();
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80 | }
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81 | }
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