org.meteoinfo.data.mapdata.webmap.Tile Maven / Gradle / Ivy
/*
* Tile.java
*
* Created on March 14, 2006, 4:53 PM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package org.meteoinfo.data.mapdata.webmap;
import javax.swing.*;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.beans.PropertyChangeListener;
import java.lang.ref.SoftReference;
/**
* The Tile class represents a particular square image
* piece of the world bitmap at a particular zoom level.
* @author joshy
*/
public class Tile extends AbstractBean {
public enum Priority { High, Low }
private Priority priority = Priority.High;
// private static final Logger LOG = Logger.getLogger(Tile.class.getName());
private boolean isLoading = false;
static {
// LOG.setLevel(Level.OFF);
}
//Most Recently Accessed Tiles. These are strong references, to prevent reloading
//of most recently used tiles.
//private static final Map recentlyAccessed = new HashMap();
//private static final TileCache cache = new TileCache();
/**
* If an error occurs while loading a tile, store the exception
* here.
*/
private Throwable error;
/**
* The url of the image to load for this tile
*/
private String url;
/**
* Indicates that loading has succeeded. A PropertyChangeEvent will be fired
* when the loading is completed
*/
private boolean loaded = false;
/**
* The zoom level this tile is for
*/
private int zoom, x, y;
/**
* The image loaded for this Tile
*/
SoftReference image = new SoftReference<>(null);
/**
* Create a new Tile at the specified tile point and zoom level
* @param x X index
* @param y Y index
* @param zoom Zoom
*/
public Tile(int x, int y, int zoom) {
loaded = false;
this.zoom = zoom;
this.x = x;
this.y = y;
}
/**
* Create a new Tile that loads its data from the given URL. The URL must
* resolve to an image
*/
Tile(int x, int y, int zoom, String url, Priority priority, TileFactory dtf) {
this.url = url;
loaded = false;
this.zoom = zoom;
this.x = x;
this.y = y;
this.priority = priority;
this.dtf = dtf;
//startLoading();
}
/**
*
* Indicates if this tile's underlying image has been successfully loaded yet.
* @return true if the Tile has been loaded
*/
public synchronized boolean isLoaded() {
return loaded;
}
/**
* Toggles the loaded state, and fires the appropriate property change notification
*/
synchronized void setLoaded(boolean loaded) {
boolean old = isLoaded();
this.loaded = loaded;
firePropertyChange("loaded", old, isLoaded());
}
/**
* Returns the last error in a possible chain of errors that occured during
* the loading of the tile
* @return
*/
public Throwable getUnrecoverableError() {
return error;
}
/**
* Returns the Throwable tied to any error that may have ocurred while
* loading the tile. This error may change several times if multiple
* errors occur
* @return Throwable
*/
public Throwable getLoadingError() {
return error;
}
/**
* Returns the Image associated with this Tile. This is a read only property
* This may return null at any time, however if this returns null,
* a load operation will automatically be started for it.
* @return BufferedImage
*/
public BufferedImage getImage() {
BufferedImage img = image.get();
if (img == null) {
setLoaded(false);
dtf.startLoading(this);
}
return img;
}
/**
* @return the location in the world at this zoom level that this tile should
* be placed
*/
/*
public TilePoint getLocation() {
return location;
}*/
/**
* @return the zoom level that this tile belongs in
*/
public int getZoom() {
return zoom;
}
//////////////////JavaOne Hack///////////////////
private PropertyChangeListener uniqueListener = null;
/**
* Adds a single property change listener. If a listener has been previously
* added then it will be replaced by the new one.
* @param propertyName
* @param listener
*/
public void addUniquePropertyChangeListener(String propertyName, PropertyChangeListener listener) {
if (uniqueListener != null && uniqueListener != listener) {
removePropertyChangeListener(propertyName, uniqueListener);
}
if (uniqueListener != listener) {
uniqueListener = listener;
addPropertyChangeListener(propertyName, uniqueListener);
}
}
/////////////////End JavaOne Hack/////////////////
/**
*/
void firePropertyChangeOnEDT(final String propertyName, final Object oldValue, final Object newValue) {
if (!EventQueue.isDispatchThread()) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
firePropertyChange(propertyName, oldValue, newValue);
}
});
}
}
private static void p(String string) {
System.out.println(string);
}
/**
* @return the error
*/
public Throwable getError() {
return error;
}
/**
* @param error the error to set
*/
public void setError(Throwable error) {
this.error = error;
}
/**
* @return the isLoading
*/
public boolean isLoading() {
return isLoading;
}
/**
* @param isLoading the isLoading to set
*/
public void setLoading(boolean isLoading) {
this.isLoading = isLoading;
}
/**
* Gets the loading priority of this tile.
* @return Priority
*/
public Priority getPriority() {
return priority;
}
/**
* Set the loading priority of this tile.
* @param priority the priority to set
*/
public void setPriority(Priority priority) {
this.priority = priority;
}
/**
* Gets the URL of this tile.
* @return URL string
*/
public String getURL() {
return url;
}
public int getX() {
return x;
}
public int getY() {
return y;
}
private TileFactory dtf;
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy