/*
 * GroupLayer.java
 *
 * Created on 29 de Março de 2006, 11:05
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */


import com.bbn.openmap.Layer;
import com.bbn.openmap.LayerHandler;
import com.bbn.openmap.event.LayerStatusEvent;
import com.bbn.openmap.event.LayerStatusListener;
import com.bbn.openmap.event.ProjectionEvent;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Properties;

/**
 *
 * @author cicero
 */
public class GroupLayer extends Layer implements ComponentListener{
    
    public static final String LAYERSPROP = "layers";
    
    private Layer[] layers = null;
    private String[] stLayers = null;
    private LayerHandler layerHandler;
    
    private boolean hiddenInside = false;//prevents an infinite loop
    
    
    public void projectionChanged(ProjectionEvent projectionEvent) {
        //doesnt draw anything
    }
    
    
    public void findAndInit(Object obj) {
        super.findAndInit(obj);
        
        //Finds the LayerHandler
        if (obj instanceof LayerHandler) {
            layerHandler = (LayerHandler) obj;
            return;
        }
        
        //Finds the layers
        if (obj instanceof Layer) {
            Layer layer = (Layer) obj;
            int pos = Arrays.binarySearch(stLayers, layer.getPropertyPrefix());
            if (pos >= 0) {
                layers[pos] = layer;
                layer.addComponentListener(this);
                //Turns it on if necessary
                if (this.isVisible()) {
                    layer.setVisible(true);
                    if (layerHandler!=null) layerHandler.setLayers();
                }
            }
        }
    }
    
    /**
     * Show/hiddes all the layers
     * @param vis 
     */
    public void setVisible(boolean vis) {
        super.setVisible(vis);
        if (!hiddenInside)
            for (Layer lay: layers)
                if (lay!=null) lay.setVisible(vis);
    }
            
    /**
     * If a layer in the group is hidden, the group layer must be
     * hidden as well
     * @param e 
     */
    public void componentHidden(ComponentEvent e) {
        this.hiddenInside = true;
        this.setVisible(false);
        this.hiddenInside = false;
    }
    
    public void componentResized(ComponentEvent e) { }
    
    public void componentMoved(ComponentEvent e) { }
    
    public void componentShown(ComponentEvent e) { }
    
    /**
     * Get the properties
     */
    public void setProperties(String prefix, Properties properties) {
        super.setProperties(prefix, properties);
        
        stLayers = properties.getProperty(prefix + "." + 
                LAYERSPROP).split(" ");
        Arrays.sort(stLayers);
        
        layers = new Layer[stLayers.length];
    }
}