[608] | 1 | // License: GPL. See LICENSE file for details.
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| 2 |
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[17] | 3 | package org.openstreetmap.josm.gui.layer;
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| 4 |
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[1808] | 5 | import static org.openstreetmap.josm.tools.I18n.tr;
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| 6 |
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[4230] | 7 | import java.awt.Color;
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[103] | 8 | import java.awt.Component;
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[2450] | 9 | import java.awt.Graphics2D;
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[1808] | 10 | import java.awt.event.ActionEvent;
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[1890] | 11 | import java.beans.PropertyChangeListener;
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| 12 | import java.beans.PropertyChangeSupport;
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[138] | 13 | import java.io.File;
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[3408] | 14 | import java.util.List;
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[17] | 15 |
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[1808] | 16 | import javax.swing.AbstractAction;
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[3408] | 17 | import javax.swing.Action;
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[17] | 18 | import javax.swing.Icon;
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[4183] | 19 | import javax.swing.JOptionPane;
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[3408] | 20 | import javax.swing.JSeparator;
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[17] | 21 |
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[4183] | 22 | import org.openstreetmap.josm.Main;
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[1808] | 23 | import org.openstreetmap.josm.actions.GpxExportAction;
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| 24 | import org.openstreetmap.josm.actions.SaveAction;
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[5459] | 25 | import org.openstreetmap.josm.actions.SaveActionBase;
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[1808] | 26 | import org.openstreetmap.josm.actions.SaveAsAction;
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[2450] | 27 | import org.openstreetmap.josm.data.Bounds;
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[71] | 28 | import org.openstreetmap.josm.data.osm.visitor.BoundingXYVisitor;
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[4126] | 29 | import org.openstreetmap.josm.data.projection.Projection;
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| 30 | import org.openstreetmap.josm.data.projection.ProjectionChangeListener;
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[17] | 31 | import org.openstreetmap.josm.gui.MapView;
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[208] | 32 | import org.openstreetmap.josm.tools.Destroyable;
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[1808] | 33 | import org.openstreetmap.josm.tools.ImageProvider;
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[17] | 34 |
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| 35 | /**
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[1508] | 36 | * A layer encapsulates the gui component of one dataset and its representation.
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[1169] | 37 | *
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[1508] | 38 | * Some layers may display data directly imported from OSM server. Other only
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[1169] | 39 | * display background images. Some can be edited, some not. Some are static and
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[17] | 40 | * other changes dynamically (auto-updated).
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| 41 | *
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| 42 | * Layers can be visible or not. Most actions the user can do applies only on
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| 43 | * selected layers. The available actions depend on the selected layers too.
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[1169] | 44 | *
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| 45 | * All layers are managed by the MapView. They are displayed in a list to the
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[17] | 46 | * right of the screen.
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[1169] | 47 | *
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[17] | 48 | * @author imi
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| 49 | */
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[4126] | 50 | abstract public class Layer implements Destroyable, MapViewPaintable, ProjectionChangeListener {
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[3408] | 51 |
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| 52 | public interface LayerAction {
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| 53 | boolean supportLayers(List<Layer> layers);
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| 54 | Component createMenuComponent();
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| 55 | }
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| 56 |
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[4230] | 57 | public interface MultiLayerAction {
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| 58 | Action getMultiLayerAction(List<Layer> layers);
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| 59 | }
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| 60 |
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| 61 |
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[3408] | 62 | /**
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| 63 | * Special class that can be returned by getMenuEntries when JSeparator needs to be created
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| 64 | *
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| 65 | */
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| 66 | public static class SeparatorLayerAction extends AbstractAction implements LayerAction {
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| 67 | public static final SeparatorLayerAction INSTANCE = new SeparatorLayerAction();
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| 68 | @Override
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| 69 | public void actionPerformed(ActionEvent e) {
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| 70 | throw new UnsupportedOperationException();
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| 71 | }
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| 72 | @Override
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| 73 | public Component createMenuComponent() {
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| 74 | return new JSeparator();
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| 75 | }
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| 76 | @Override
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| 77 | public boolean supportLayers(List<Layer> layers) {
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| 78 | return false;
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| 79 | }
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| 80 | }
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| 81 |
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[1890] | 82 | static public final String VISIBLE_PROP = Layer.class.getName() + ".visible";
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[3705] | 83 | static public final String OPACITY_PROP = Layer.class.getName() + ".opacity";
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[1890] | 84 | static public final String NAME_PROP = Layer.class.getName() + ".name";
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[17] | 85 |
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[5390] | 86 | static public final int ICON_SIZE = 16;
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| 87 |
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[1890] | 88 | /** keeps track of property change listeners */
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[2025] | 89 | protected PropertyChangeSupport propertyChangeSupport;
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[1890] | 90 |
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[1169] | 91 | /**
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| 92 | * The visibility state of the layer.
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[2512] | 93 | *
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[1169] | 94 | */
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[2017] | 95 | private boolean visible = true;
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[989] | 96 |
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[1169] | 97 | /**
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[3705] | 98 | * The opacity of the layer.
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| 99 | *
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| 100 | */
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| 101 | private double opacity = 1;
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| 102 |
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| 103 | /**
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[1169] | 104 | * The layer should be handled as a background layer in automatic handling
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[2512] | 105 | *
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[1169] | 106 | */
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[2192] | 107 | private boolean background = false;
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[989] | 108 |
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[1169] | 109 | /**
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| 110 | * The name of this layer.
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[2512] | 111 | *
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[1169] | 112 | */
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[2017] | 113 | private String name;
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| 114 |
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[1169] | 115 | /**
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| 116 | * If a file is associated with this layer, this variable should be set to it.
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| 117 | */
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[1646] | 118 | private File associatedFile;
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[23] | 119 |
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[1169] | 120 | /**
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| 121 | * Create the layer and fill in the necessary components.
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| 122 | */
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| 123 | public Layer(String name) {
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[1890] | 124 | this.propertyChangeSupport = new PropertyChangeSupport(this);
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| 125 | setName(name);
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[1169] | 126 | }
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[17] | 127 |
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[1169] | 128 | /**
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[5391] | 129 | * Initialization code, that depends on Main.map.mapView.
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| 130 | *
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| 131 | * It is always called in the event dispatching thread.
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| 132 | * Note that Main.map is null as long as no layer has been added, so do
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| 133 | * not execute code in the constructor, that assumes Main.map.mapView is
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| 134 | * not null. Instead override this method.
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| 135 | */
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| 136 | public void hookUpMapView() {
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| 137 | }
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| 138 |
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| 139 | /**
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[1169] | 140 | * Paint the dataset using the engine set.
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| 141 | * @param mv The object that can translate GeoPoints to screen coordinates.
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| 142 | */
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[3705] | 143 | @Override
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[2450] | 144 | abstract public void paint(Graphics2D g, MapView mv, Bounds box);
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[1169] | 145 | /**
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| 146 | * Return a representative small image for this layer. The image must not
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| 147 | * be larger than 64 pixel in any dimension.
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| 148 | */
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| 149 | abstract public Icon getIcon();
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[21] | 150 |
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[1169] | 151 | /**
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[4230] | 152 | * Return a Color for this layer. Return null when no color specified.
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| 153 | * @param ignoreCustom Custom color should return null, as no default color
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| 154 | * is used. When this is true, then even for custom coloring the base
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| 155 | * color is returned - mainly for layer internal use.
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| 156 | */
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| 157 | public Color getColor(boolean ignoreCustom) {
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| 158 | return null;
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| 159 | }
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| 160 |
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| 161 | /**
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[1169] | 162 | * @return A small tooltip hint about some statistics for this layer.
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| 163 | */
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| 164 | abstract public String getToolTipText();
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[23] | 165 |
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[1169] | 166 | /**
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| 167 | * Merges the given layer into this layer. Throws if the layer types are
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| 168 | * incompatible.
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| 169 | * @param from The layer that get merged into this one. After the merge,
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| 170 | * the other layer is not usable anymore and passing to one others
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| 171 | * mergeFrom should be one of the last things to do with a layer.
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| 172 | */
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| 173 | abstract public void mergeFrom(Layer from);
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[655] | 174 |
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[1169] | 175 | /**
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| 176 | * @param other The other layer that is tested to be mergable with this.
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| 177 | * @return Whether the other layer can be merged into this layer.
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| 178 | */
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| 179 | abstract public boolean isMergable(Layer other);
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[78] | 180 |
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[1169] | 181 | abstract public void visitBoundingBox(BoundingXYVisitor v);
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| 182 |
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| 183 | abstract public Object getInfoComponent();
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| 184 |
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[3408] | 185 | /**
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| 186 | * Returns list of actions. Action can implement LayerAction interface when it needs to be represented by other
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| 187 | * menu component than JMenuItem or when it supports multiple layers. Actions that support multiple layers should also
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| 188 | * have correct equals implementation.
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| 189 | *
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| 190 | * Use SeparatorLayerAction.INSTANCE instead of new JSeparator
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| 191 | *
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| 192 | */
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| 193 | abstract public Action[] getMenuEntries();
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[1169] | 194 |
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| 195 | /**
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| 196 | * Called, when the layer is removed from the mapview and is going to be
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| 197 | * destroyed.
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| 198 | *
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| 199 | * This is because the Layer constructor can not add itself safely as listener
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| 200 | * to the layerlist dialog, because there may be no such dialog yet (loaded
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| 201 | * via command line parameter).
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| 202 | */
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[3705] | 203 | @Override
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[1169] | 204 | public void destroy() {}
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[1646] | 205 |
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| 206 | public File getAssociatedFile() { return associatedFile; }
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| 207 | public void setAssociatedFile(File file) { associatedFile = file; }
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[1772] | 208 |
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| 209 | /**
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| 210 | * Replies the name of the layer
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[2512] | 211 | *
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[1772] | 212 | * @return the name of the layer
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| 213 | */
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| 214 | public String getName() {
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| 215 | return name;
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| 216 | }
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[1808] | 217 |
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[1890] | 218 | /**
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| 219 | * Sets the name of the layer
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| 220 | *
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| 221 | *@param name the name. If null, the name is set to the empty string.
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| 222 | *
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| 223 | */
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| 224 | public void setName(String name) {
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| 225 | if (name == null) {
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| 226 | name = "";
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| 227 | }
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| 228 | String oldValue = this.name;
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| 229 | this.name = name;
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[1893] | 230 | if (!this.name.equals(oldValue)) {
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[1890] | 231 | propertyChangeSupport.firePropertyChange(NAME_PROP, oldValue, this.name);
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| 232 | }
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| 233 | }
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[1808] | 234 |
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[2192] | 235 | /**
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| 236 | * Replies true if this layer is a background layer
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[2512] | 237 | *
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[2192] | 238 | * @return true if this layer is a background layer
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| 239 | */
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| 240 | public boolean isBackgroundLayer() {
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| 241 | return background;
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[1808] | 242 | }
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| 243 |
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[2192] | 244 | /**
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| 245 | * Sets whether this layer is a background layer
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[2512] | 246 | *
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[2192] | 247 | * @param background true, if this layer is a background layer
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| 248 | */
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| 249 | public void setBackgroundLayer(boolean background) {
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| 250 | this.background = background;
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[1808] | 251 | }
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| 252 |
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[1890] | 253 | /**
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| 254 | * Sets the visibility of this layer. Emits property change event for
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[5266] | 255 | * property {@link #VISIBLE_PROP}.
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[2512] | 256 | *
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[1890] | 257 | * @param visible true, if the layer is visible; false, otherwise.
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| 258 | */
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| 259 | public void setVisible(boolean visible) {
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[3705] | 260 | boolean oldValue = isVisible();
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[1890] | 261 | this.visible = visible;
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[3705] | 262 | if (visible && opacity == 0) {
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| 263 | setOpacity(1);
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| 264 | } else if (oldValue != isVisible()) {
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| 265 | fireVisibleChanged(oldValue, isVisible());
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[1890] | 266 | }
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| 267 | }
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| 268 |
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| 269 | /**
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| 270 | * Replies true if this layer is visible. False, otherwise.
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| 271 | * @return true if this layer is visible. False, otherwise.
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| 272 | */
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| 273 | public boolean isVisible() {
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[3705] | 274 | return visible && opacity != 0;
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[1890] | 275 | }
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| 276 |
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[3705] | 277 | public double getOpacity() {
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| 278 | return opacity;
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| 279 | }
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| 280 |
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| 281 | public void setOpacity(double opacity) {
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| 282 | if (!(opacity >= 0 && opacity <= 1))
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| 283 | throw new IllegalArgumentException("Opacity value must be between 0 and 1");
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| 284 | double oldOpacity = getOpacity();
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| 285 | boolean oldVisible = isVisible();
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| 286 | this.opacity = opacity;
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| 287 | if (oldOpacity != getOpacity()) {
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| 288 | fireOpacityChanged(oldOpacity, getOpacity());
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| 289 | }
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| 290 | if (oldVisible != isVisible()) {
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| 291 | fireVisibleChanged(oldVisible, isVisible());
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| 292 | }
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| 293 | }
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| 294 |
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[1890] | 295 | /**
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| 296 | * Toggles the visibility state of this layer.
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| 297 | */
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| 298 | public void toggleVisible() {
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| 299 | setVisible(!isVisible());
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| 300 | }
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| 301 |
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| 302 | /**
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[5266] | 303 | * Adds a {@link PropertyChangeListener}
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[2512] | 304 | *
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[1890] | 305 | * @param listener the listener
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| 306 | */
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| 307 | public void addPropertyChangeListener(PropertyChangeListener listener) {
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| 308 | propertyChangeSupport.addPropertyChangeListener(listener);
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| 309 | }
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| 310 |
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| 311 | /**
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[5266] | 312 | * Removes a {@link PropertyChangeListener}
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[2512] | 313 | *
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[1890] | 314 | * @param listener the listener
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| 315 | */
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| 316 | public void removePropertyChangeListener(PropertyChangeListener listener) {
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| 317 | propertyChangeSupport.removePropertyChangeListener(listener);
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| 318 | }
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| 319 |
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| 320 | /**
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[5266] | 321 | * fires a property change for the property {@link #VISIBLE_PROP}
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[2512] | 322 | *
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[1890] | 323 | * @param oldValue the old value
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| 324 | * @param newValue the new value
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| 325 | */
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| 326 | protected void fireVisibleChanged(boolean oldValue, boolean newValue) {
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| 327 | propertyChangeSupport.firePropertyChange(VISIBLE_PROP, oldValue, newValue);
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| 328 | }
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[2192] | 329 |
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| 330 | /**
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[5266] | 331 | * fires a property change for the property {@link #OPACITY_PROP}
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[3116] | 332 | *
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[3705] | 333 | * @param oldValue the old value
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| 334 | * @param newValue the new value
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| 335 | */
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| 336 | protected void fireOpacityChanged(double oldValue, double newValue) {
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| 337 | propertyChangeSupport.firePropertyChange(OPACITY_PROP, oldValue, newValue);
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| 338 | }
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| 339 |
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| 340 | /**
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[4183] | 341 | * Check changed status of layer
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[3116] | 342 | *
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| 343 | * @return True if layer was changed since last paint
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| 344 | */
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| 345 | public boolean isChanged() {
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| 346 | return true;
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| 347 | }
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| 348 |
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| 349 | /**
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[4183] | 350 | * allows to check whether a projection is supported or not
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| 351 | *
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| 352 | * @return True if projection is supported for this layer
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| 353 | */
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| 354 | public boolean isProjectionSupported(Projection proj) {
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| 355 | return true;
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| 356 | }
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| 357 |
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| 358 | /**
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| 359 | * Specify user information about projections
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| 360 | *
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| 361 | * @return User readable text telling about supported projections
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| 362 | */
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| 363 | public String nameSupportedProjections() {
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| 364 | return tr("All projections are supported");
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| 365 | }
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| 366 |
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| 367 | /**
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[2192] | 368 | * The action to save a layer
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[2512] | 369 | *
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[2192] | 370 | */
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| 371 | public static class LayerSaveAction extends AbstractAction {
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| 372 | private Layer layer;
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| 373 | public LayerSaveAction(Layer layer) {
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| 374 | putValue(SMALL_ICON, ImageProvider.get("save"));
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| 375 | putValue(SHORT_DESCRIPTION, tr("Save the current data."));
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| 376 | putValue(NAME, tr("Save"));
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| 377 | setEnabled(true);
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| 378 | this.layer = layer;
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| 379 | }
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| 380 |
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[6084] | 381 | @Override
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[2192] | 382 | public void actionPerformed(ActionEvent e) {
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[5014] | 383 | SaveAction.getInstance().doSave(layer);
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[2192] | 384 | }
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| 385 | }
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| 386 |
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| 387 | public static class LayerSaveAsAction extends AbstractAction {
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| 388 | private Layer layer;
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| 389 | public LayerSaveAsAction(Layer layer) {
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| 390 | putValue(SMALL_ICON, ImageProvider.get("save_as"));
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| 391 | putValue(SHORT_DESCRIPTION, tr("Save the current data to a new file."));
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| 392 | putValue(NAME, tr("Save As..."));
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| 393 | setEnabled(true);
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| 394 | this.layer = layer;
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| 395 | }
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| 396 |
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[6084] | 397 | @Override
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[2192] | 398 | public void actionPerformed(ActionEvent e) {
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[5048] | 399 | SaveAsAction.getInstance().doSave(layer);
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[2192] | 400 | }
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| 401 | }
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| 402 |
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| 403 | public static class LayerGpxExportAction extends AbstractAction {
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| 404 | private Layer layer;
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| 405 | public LayerGpxExportAction(Layer layer) {
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| 406 | putValue(SMALL_ICON, ImageProvider.get("exportgpx"));
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| 407 | putValue(SHORT_DESCRIPTION, tr("Export the data to GPX file."));
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| 408 | putValue(NAME, tr("Export to GPX..."));
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| 409 | setEnabled(true);
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| 410 | this.layer = layer;
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| 411 | }
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| 412 |
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[6084] | 413 | @Override
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[2192] | 414 | public void actionPerformed(ActionEvent e) {
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| 415 | new GpxExportAction().export(layer);
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| 416 | }
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| 417 | }
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[4126] | 418 |
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| 419 | /* --------------------------------------------------------------------------------- */
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| 420 | /* interface ProjectionChangeListener */
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| 421 | /* --------------------------------------------------------------------------------- */
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| 422 | @Override
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| 423 | public void projectionChanged(Projection oldValue, Projection newValue) {
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[4183] | 424 | if(!isProjectionSupported(newValue)) {
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[5266] | 425 | JOptionPane.showMessageDialog(Main.parent,
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| 426 | tr("The layer {0} does not support the new projection {1}.\n{2}\n"
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| 427 | + "Change the projection again or remove the layer.",
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| 428 | getName(), newValue.toCode(), nameSupportedProjections()),
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| 429 | tr("Warning"),
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| 430 | JOptionPane.WARNING_MESSAGE);
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[4183] | 431 | }
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[4126] | 432 | }
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[5459] | 433 |
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| 434 | /**
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| 435 | * Initializes the layer after a successful load of data from a file
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| 436 | * @since 5459
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| 437 | */
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| 438 | public void onPostLoadFromFile() {
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| 439 | // To be overriden if needed
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| 440 | }
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[6070] | 441 |
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[5459] | 442 | /**
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| 443 | * Replies the savable state of this layer (i.e if it can be saved through a "File->Save" dialog).
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| 444 | * @return true if this layer can be saved to a file
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| 445 | * @since 5459
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| 446 | */
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| 447 | public boolean isSavable() {
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| 448 | return false;
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| 449 | }
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[6070] | 450 |
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[5459] | 451 | /**
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| 452 | * Checks whether it is ok to launch a save (whether we have data, there is no conflict etc.)
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| 453 | * @return <code>true</code>, if it is safe to save.
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| 454 | * @since 5459
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| 455 | */
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| 456 | public boolean checkSaveConditions() {
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| 457 | return true;
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| 458 | }
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[6070] | 459 |
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[5459] | 460 | /**
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| 461 | * Creates a new "Save" dialog for this layer and makes it visible.<br/>
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| 462 | * When the user has chosen a file, checks the file extension, and confirms overwrite if needed.
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| 463 | * @return The output {@code File}
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| 464 | * @since 5459
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| 465 | * @see SaveActionBase#createAndOpenSaveFileChooser
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| 466 | */
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| 467 | public File createAndOpenSaveFileChooser() {
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| 468 | return SaveActionBase.createAndOpenSaveFileChooser(tr("Save Layer"), "lay");
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| 469 | }
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[17] | 470 | }
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