/*
 * PostGISLayer.java
 *
 * Created on 01 December 2001, 01:36
 */

package uk.ac.leeds.ccg.sfsql;
import uk.ac.leeds.ccg.geotools.*;
/**
 *
 * @author  James Macgill
 * @version 
 */
public class PostGISLayer extends MixedLayer implements Runnable{
    PostGISDataSource featureSource;
    
    GeoRectangle last;
    /** Creates new PostGISLayer */
    public PostGISLayer(PostGISDataSource featureSource,GeoRectangle initalExtent) {
        super.setBounds(initalExtent);
        this.featureSource = featureSource;
        updateFeatures(initalExtent);
        
       
    }
    
    public void paintScaled(GeoGraphics g){
        GeoRectangle bbox = g.getScale().getMapExtent();
        if(!bbox.equals(last)){
            updateFeatures(bbox);
        }
        super.paintScaled(g);
    }
    
    public void updateFeatures(GeoRectangle bounds){
        last = bounds;
        
        Thread updater = new Thread(this);
        updater.start();
       
        
    }
    
    public void run() {
        try{
        featureSource.addFeatures(this,(GeoRectangle)last.clone());
        System.out.println("New features in place"); 
        }
        catch(Exception e){
            System.err.println("Update failed "+e);
            e.printStackTrace();
        }
    }    

}