/* uDig - User Friendly Desktop Internet GIS client
* http://udig.refractions.net
* (C) 2004, Refractions Research Inc.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* (http://www.eclipse.org/legal/epl-v10.html), and the Refractions BSD
* License v1.0 (http://udig.refractions.net/files/bsd3-v10.html).
*/
package org.locationtech.udig.project.internal.render.impl;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.util.HashSet;
import java.util.Set;
import org.locationtech.udig.project.render.ILabelPainter;
import org.geotools.geometry.GeometryFactoryFinder;
import org.geotools.geometry.jts.JTS;
import org.geotools.geometry.jts.JTSFactoryFinder;
import org.geotools.renderer.label.LabelCacheImpl;
import org.geotools.renderer.lite.LabelCache;
import org.geotools.renderer.lite.SynchronizedLabelCache;
import com.vividsolutions.jts.geom.GeometryFactory;
/**
* Extends the Geotools default labeller so that the geotools renderer doesn't clear the cache when it runs.
* The comments in the geotools default label cache states this is ok.
* <p>
* Also over-rides end so that geotools renderers don't cause the rendering and we can do it once at the end.
* </p>
*
* @author Jesse
* @since 1.1.0
*/
public class UDIGLabelCache extends SynchronizedLabelCache implements ILabelPainter {
Set<String> activeLayers = new HashSet<String>();
private LabelCache wrappedLabelCache;
/**
*
*/
public UDIGLabelCache() {
this(new LabelCacheImpl()); // switch to new one here!
}
/**
* @param defaultLabelCache
*/
public UDIGLabelCache( LabelCache labelCache ) {
super(labelCache);
this.wrappedLabelCache = labelCache;
}
public Object getAdapter( Class adapter ) {
return null;
}
@Override
public synchronized void startLayer( String layerId ) {
activeLayers.add(layerId);
super.startLayer(layerId);
}
@Override
public synchronized void stop() {
activeLayers.clear();
super.stop();
}
@Override
public synchronized void end( Graphics2D graphics, Rectangle displayArea ) {
if (activeLayers.isEmpty()) {
super.end(graphics, displayArea);
//System.out.println("Labels are rendered");
} else {
//System.out.println("Labels are NOT rendered");
}
}
@Override
public synchronized void clear() {
if (activeLayers.isEmpty())
super.clear();
}
@Override
public synchronized void clear( String layerId ) {
if (!activeLayers.contains(layerId))
super.clear(layerId);
}
@Override
public synchronized void endLayer( String layerId, Graphics2D graphics, Rectangle displayArea ) {
activeLayers.remove(layerId);
super.endLayer(layerId, graphics, displayArea);
}
/**
* Returns wrapped label cache for giving rendering hints e.g.
*
* @return
*/
protected LabelCache getWrapperLabelCache() {
return wrappedLabelCache;
}
}