Application: gvSIG desktop

package com.iver.cit.gvsig.fmap.layers.layerOperations;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

import com.iver.cit.gvsig.fmap.DriverException;

import com.iver.cit.gvsig.fmap.ViewPort;

import com.iver.cit.gvsig.fmap.layers.FLayer;

import com.iver.utiles.swing.threads.Cancellable;

/**

 * Interface for the classes that make able 

 * a single draw for a layers group

 *  

 * @see  com.iver.cit.gvsig.fmap.layers.FLayer#newComposedLayer()

 */

public interface ComposedLayer {

        /**

         * Checks if the layer can be added to this group

         * 

         * @param layer

         * @return layer can be added or not

         */

        public boolean canAdd(FLayer layer);

        /**

         * Adds the layer to the draw group

         * @see com.iver.cit.gvsig.fmap.layers.layerOperations.ComposedLayer#canAdd(FLayer)

         * 

         * @param layer

         * @throws Exception 

         */

        public void add(FLayer layer) throws Exception;

        /**

         * Draws all the group in one pass

         * 

         *

         * @see  com.iver.cit.gvsig.fmap.layers.FLayer#draw(BufferedImage, Graphics2D, ViewPort, Cancellable, double)

         */

    public void draw(BufferedImage image, Graphics2D g, ViewPort viewPort,

                        Cancellable cancel,double scale) throws DriverException;

}