| 1 | package org.openstreetmap.josm.gui.layer;
|
|---|
| 2 |
|
|---|
| 3 | import java.awt.Component;
|
|---|
| 4 | import java.awt.Graphics;
|
|---|
| 5 | import java.io.File;
|
|---|
| 6 |
|
|---|
| 7 | import javax.swing.Icon;
|
|---|
| 8 |
|
|---|
| 9 | import org.openstreetmap.josm.data.osm.visitor.BoundingXYVisitor;
|
|---|
| 10 | import org.openstreetmap.josm.gui.MapView;
|
|---|
| 11 |
|
|---|
| 12 | /**
|
|---|
| 13 | * A layer encapsulates the gui componente of one dataset and its representation.
|
|---|
| 14 | *
|
|---|
| 15 | * Some layers may display data directly importet from OSM server. Other only
|
|---|
| 16 | * display background images. Some can be edited, some not. Some are static and
|
|---|
| 17 | * other changes dynamically (auto-updated).
|
|---|
| 18 | *
|
|---|
| 19 | * Layers can be visible or not. Most actions the user can do applies only on
|
|---|
| 20 | * selected layers. The available actions depend on the selected layers too.
|
|---|
| 21 | *
|
|---|
| 22 | * All layers are managed by the MapView. They are displayed in a list to the
|
|---|
| 23 | * right of the screen.
|
|---|
| 24 | *
|
|---|
| 25 | * @author imi
|
|---|
| 26 | */
|
|---|
| 27 | abstract public class Layer {
|
|---|
| 28 |
|
|---|
| 29 | /**
|
|---|
| 30 | * The visibility state of the layer.
|
|---|
| 31 | */
|
|---|
| 32 | public boolean visible = true;
|
|---|
| 33 | /**
|
|---|
| 34 | * The name of this layer.
|
|---|
| 35 | */
|
|---|
| 36 | public String name;
|
|---|
| 37 | /**
|
|---|
| 38 | * If a file is associated with this layer, this variable should be set to it.
|
|---|
| 39 | */
|
|---|
| 40 | public File associatedFile;
|
|---|
| 41 |
|
|---|
| 42 | /**
|
|---|
| 43 | * Create the layer and fill in the necessary components.
|
|---|
| 44 | */
|
|---|
| 45 | public Layer(String name) {
|
|---|
| 46 | this.name = name;
|
|---|
| 47 | }
|
|---|
| 48 |
|
|---|
| 49 | /**
|
|---|
| 50 | * Paint the dataset using the engine set.
|
|---|
| 51 | * @param mv The object that can translate GeoPoints to screen coordinates.
|
|---|
| 52 | */
|
|---|
| 53 | abstract public void paint(Graphics g, MapView mv);
|
|---|
| 54 | /**
|
|---|
| 55 | * Return a representative small image for this layer. The image must not
|
|---|
| 56 | * be larger than 64 pixel in any dimension.
|
|---|
| 57 | */
|
|---|
| 58 | abstract public Icon getIcon();
|
|---|
| 59 |
|
|---|
| 60 | /**
|
|---|
| 61 | * @return A small tooltip hint about some statistics for this layer.
|
|---|
| 62 | */
|
|---|
| 63 | abstract public String getToolTipText();
|
|---|
| 64 |
|
|---|
| 65 | /**
|
|---|
| 66 | * Merges the given layer into this layer. Throws if the layer types are
|
|---|
| 67 | * incompatible.
|
|---|
| 68 | * @param from The layer that get merged into this one. After the merge,
|
|---|
| 69 | * the other layer is not usable anymore and passing to one others
|
|---|
| 70 | * mergeFrom should be one of the last things to do with a layer.
|
|---|
| 71 | */
|
|---|
| 72 | abstract public void mergeFrom(Layer from);
|
|---|
| 73 |
|
|---|
| 74 | /**
|
|---|
| 75 | * @param other The other layer that is tested to be mergable with this.
|
|---|
| 76 | * @return Whether the other layer can be merged into this layer.
|
|---|
| 77 | */
|
|---|
| 78 | abstract public boolean isMergable(Layer other);
|
|---|
| 79 |
|
|---|
| 80 | /**
|
|---|
| 81 | * @return The bounding rectangle this layer occupies on screen when looking
|
|---|
| 82 | * at x/y values or <code>null</code>, if infinite area or unknown
|
|---|
| 83 | * area is occupied.
|
|---|
| 84 | */
|
|---|
| 85 | abstract public void visitBoundingBox(BoundingXYVisitor v);
|
|---|
| 86 |
|
|---|
| 87 | abstract public Object getInfoComponent();
|
|---|
| 88 |
|
|---|
| 89 | abstract public Component[] getMenuEntries();
|
|---|
| 90 | }
|
|---|
