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.List;
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9 |
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10 | import javax.swing.AbstractAction;
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11 |
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12 | import org.openstreetmap.josm.gui.dialogs.IEnabledStateUpdating;
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13 | import org.openstreetmap.josm.gui.dialogs.LayerListDialog;
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14 | import org.openstreetmap.josm.gui.dialogs.LayerListDialog.LayerListModel;
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15 | import org.openstreetmap.josm.gui.help.HelpUtil;
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16 | import org.openstreetmap.josm.gui.layer.Layer;
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17 | import org.openstreetmap.josm.gui.layer.MainLayerManager.ActiveLayerChangeEvent;
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18 | import org.openstreetmap.josm.gui.layer.MainLayerManager.ActiveLayerChangeListener;
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19 | import org.openstreetmap.josm.gui.util.GuiHelper;
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20 | import org.openstreetmap.josm.gui.util.MultikeyShortcutAction;
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21 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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22 | import org.openstreetmap.josm.tools.Destroyable;
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23 | import org.openstreetmap.josm.tools.ImageProvider;
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24 | import org.openstreetmap.josm.tools.Shortcut;
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25 |
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26 | /**
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27 | * The action to activate the currently selected layer
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28 | */
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29 | public final class ActivateLayerAction extends AbstractAction
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30 | implements IEnabledStateUpdating, ActiveLayerChangeListener, MultikeyShortcutAction, Destroyable {
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31 | private transient Layer layer;
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32 | private final transient Shortcut multikeyShortcut;
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33 | private final LayerListModel model;
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34 |
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35 | /**
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36 | * Constructs a new {@code ActivateLayerAction}.
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37 | * @param layer the layer
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38 | * @param model layer list model
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39 | */
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40 | public ActivateLayerAction(Layer layer, LayerListModel model) {
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41 | this(model);
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42 | CheckParameterUtil.ensureParameterNotNull(layer, "layer");
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43 | this.layer = layer;
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44 | putValue(NAME, tr("Activate"));
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45 | updateEnabledState();
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46 | }
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47 |
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48 | /**
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49 | * Constructs a new {@code ActivateLayerAction}.
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50 | * @param model layer list model
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51 | */
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52 | public ActivateLayerAction(LayerListModel model) {
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53 | this.model = model;
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54 | putValue(NAME, tr("Activate"));
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55 | new ImageProvider("dialogs", "activate").getResource().attachImageIcon(this, true);
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56 | putValue(SHORT_DESCRIPTION, tr("Activate the selected layer"));
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57 | multikeyShortcut = Shortcut.registerShortcut("core_multikey:activateLayer", tr("Multikey: {0}",
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58 | tr("Activate layer")), KeyEvent.VK_A, Shortcut.SHIFT);
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59 | multikeyShortcut.setAccelerator(this);
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60 | putValue("help", HelpUtil.ht("/Dialog/LayerList#ActivateLayer"));
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61 | }
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62 |
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63 | @Override
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64 | public Shortcut getMultikeyShortcut() {
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65 | return multikeyShortcut;
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66 | }
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67 |
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68 | @Override
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69 | public void actionPerformed(ActionEvent e) {
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70 | Layer toActivate;
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71 | if (layer != null) {
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72 | toActivate = layer;
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73 | } else {
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74 | List<Layer> layers = model.getSelectedLayers();
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75 | if (layers.isEmpty()) {
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76 | // see #19476 for a possible cause
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77 | return;
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78 | }
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79 | toActivate = layers.get(0);
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80 | }
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81 | execute(toActivate);
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82 | }
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83 |
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84 | private void execute(Layer layer) {
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85 | // model is going to be updated via LayerChangeListener and PropertyChangeEvents
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86 | model.getLayerManager().setActiveLayer(layer);
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87 | layer.setVisible(true);
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88 | }
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89 |
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90 | boolean isActiveLayer(Layer layer) {
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91 | return model.getLayerManager().getActiveLayer() == layer;
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92 | }
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93 |
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94 | @Override
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95 | public void updateEnabledState() {
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96 | GuiHelper.runInEDTAndWait(() -> {
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97 | if (layer == null) {
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98 | if (model.getSelectedLayers().size() != 1) {
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99 | setEnabled(false);
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100 | return;
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101 | }
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102 | setEnabled(!isActiveLayer(model.getSelectedLayers().get(0)));
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103 | } else {
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104 | setEnabled(!isActiveLayer(layer));
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105 | }
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106 | });
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107 | }
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108 |
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109 | @Override
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110 | public void activeOrEditLayerChanged(ActiveLayerChangeEvent e) {
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111 | updateEnabledState();
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112 | }
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113 |
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114 | @Override
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115 | public void executeMultikeyAction(int index, boolean repeat) {
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116 | Layer l = LayerListDialog.getLayerForIndex(index);
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117 | if (l != null) {
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118 | execute(l);
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119 | }
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120 | }
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121 |
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122 | @Override
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123 | public List<MultikeyInfo> getMultikeyCombinations() {
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124 | return LayerListDialog.getLayerInfoByClass(Layer.class);
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125 | }
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126 |
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127 | @Override
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128 | public MultikeyInfo getLastMultikeyAction() {
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129 | return null; // Repeating action doesn't make much sense for activating
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130 | }
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131 |
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132 | @Override
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133 | public void destroy() {
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134 | layer = null;
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135 | }
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136 |
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137 | }
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