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.event.ActionEvent;
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7 | import java.awt.event.KeyEvent;
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8 | import java.util.ArrayList;
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9 | import java.util.Collections;
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10 | import java.util.List;
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11 | import java.util.stream.Collectors;
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12 |
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13 | import org.openstreetmap.josm.actions.JosmAction;
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14 | import org.openstreetmap.josm.gui.MainApplication;
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15 | import org.openstreetmap.josm.gui.layer.ImageryLayer;
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16 | import org.openstreetmap.josm.gui.layer.Layer;
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17 | import org.openstreetmap.josm.gui.layer.MainLayerManager;
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18 | import org.openstreetmap.josm.tools.ImageProvider;
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19 | import org.openstreetmap.josm.tools.Shortcut;
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20 |
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21 | /**
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22 | * Allow users to cycle between adjacent layers easily
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23 | *
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24 | * @author Taylor Smock
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25 | * @since 15923
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26 | */
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27 | public class CycleLayerDownAction extends JosmAction {
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28 | private static final long serialVersionUID = 1L;
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29 | private static final Shortcut cycleDown =
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30 | Shortcut.registerShortcut("core:cyclelayerdown", tr("Cycle layer down"), KeyEvent.VK_CLOSE_BRACKET, Shortcut.SHIFT);
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31 |
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32 | /**
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33 | * Create a CycleLayerDownAction that cycles through layers that are in the model
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34 | */
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35 | public CycleLayerDownAction() {
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36 | super(tr("Cycle layer down"), "dialogs/previous", tr("Cycle through data layers in a downward direction"),
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37 | cycleDown, true, "cycle-layer-down", false);
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38 | new ImageProvider("dialogs", "previous").getResource().attachImageIcon(this, true);
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39 | putValue(SHORT_DESCRIPTION, tr("Cycle through visible layers."));
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40 | putValue(NAME, tr("Cycle layers"));
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41 | }
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42 |
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43 | @Override
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44 | public void actionPerformed(ActionEvent e) {
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45 | MainLayerManager manager = MainApplication.getLayerManager();
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46 | List<Layer> managerLayers = manager.getLayers().stream().filter(layer -> !(layer instanceof ImageryLayer))
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47 | .collect(Collectors.toList());
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48 | if (managerLayers.isEmpty()) {
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49 | return;
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50 | }
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51 |
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52 | List<Layer> layers = new ArrayList<>(managerLayers);
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53 | Collections.reverse(layers);
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54 | int index = layers.indexOf(manager.getActiveLayer());
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55 | int sublist = index < managerLayers.size() - 1 ? index + 1 : 0;
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56 | layers = layers.subList(sublist, layers.size());
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57 |
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58 | manager.setActiveLayer(layers.stream().filter(Layer::isVisible).filter(tlayer -> !(tlayer instanceof ImageryLayer))
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59 | .findFirst().orElse(manager.getActiveLayer()));
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60 | }
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61 | }
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