| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2005 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package org.gvsig.symbology.fmap.styles;

import java.awt.Dimension;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.geom.AffineTransform;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.net.URL;

import javax.imageio.ImageIO;

import com.iver.cit.gvsig.fmap.core.SymbologyFactory;

import com.iver.cit.gvsig.fmap.core.symbols.ISymbol;

/**

 * Controls the style of an image to be correctly painted. This class controls

 * aspects like the source path of the image, creates a rectangle to paint inside 

 * the image, draws the outline of the image and so on.

 * 

 * @author jaume dominguez faus - jaume.dominguez@iver.es

 */

public class ImageStyle extends BackgroundFileStyle {

        private BufferedImage img;

        /**

         * Creates a rectangle with the dimensions of the buffered image

         * @return Rectangle

         */

        public Rectangle getBounds() {

                return new Rectangle(new Dimension(img.getWidth(), img.getHeight()));

        }

        /**

         * Defines the source (file) from where the buffered image will be taken.

         * @param f,File

         */

        public void setSource(URL url) throws IOException {

                File f = new File(url.getFile());

                if(f.isAbsolute()){

                        sourceFile = url;

                        img = ImageIO.read(f);

                        this.isRelativePath=false;

                }

                else {

                        sourceFile = new URL(SymbologyFactory.SymbolLibraryPath + File.separator + f.getPath());

                        img = ImageIO.read(f);

                        this.isRelativePath=true;        

                }

        }

        public void drawInsideRectangle(Graphics2D g, Rectangle r, boolean keepAspectRatio) {

                double xOffset = 0;

                double yOffset = 0;

                double xScale = 1;

                double yScale = 1;

                if (keepAspectRatio) {

                        double scale;

                        if (img.getWidth()>img.getHeight()) {

                                scale = r.getWidth()/img.getWidth();

                                yOffset = 0.5*(r.getHeight() - img.getHeight()*scale);

                        } else {

                                scale = r.getHeight()/img.getHeight();

                                xOffset = 0.5*(r.getWidth() - img.getWidth()*scale);

                        }

                        xScale = yScale = scale;

                } else {

                        xScale = r.getWidth()/img.getWidth();

                        yScale = r.getHeight()/img.getHeight();

                        yOffset = img.getHeight()*0.5*yScale ;

                }

                AffineTransform at = AffineTransform.getTranslateInstance(xOffset, yOffset);

                at.concatenate(AffineTransform.getScaleInstance(xScale, yScale));

                g.drawRenderedImage(img, at);

        }

        public boolean isSuitableFor(ISymbol symbol) {

                // TODO Implement it

                throw new Error("Not yet implemented!");

        }

        public void drawOutline(Graphics2D g, Rectangle r) {

                drawInsideRectangle(g, r);

        }

        public String getClassName() {

                return getClass().getName();

        }

}