Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.symbology.fmap.mapcontext.rendering.symbol.style;

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.IOException;

import java.net.URL;

import javax.imageio.ImageIO;

import org.gvsig.fmap.mapcontext.rendering.symbols.ISymbol;

import org.gvsig.fmap.mapcontext.rendering.symbols.SymbolDrawingException;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.persistence.PersistenceManager;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.persistence.exception.PersistenceException;

import org.gvsig.tools.util.Callable;

/**

 * 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 {

    public static final String IMAGE_STYLE_PERSISTENCE_DEFINITION_NAME = "ImageStyle";

    private static final String SOURCE = "source";

        private BufferedImage img;

        /**

         * Creates a rectangle with the dimensions of the buffered image

         * @return Rectangle

         */

        public Rectangle getBounds() {

                if (img == null) return new Rectangle();

                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 {

            source = url;

                img = ImageIO.read(url);

        }

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

                if (img != null) {

                        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) throws SymbolDrawingException {

                drawInsideRectangle(g, r);

        }

        public void loadFromState(PersistentState state)

        throws PersistenceException {

            try {

                String sourceSymbolInLibrary = state.getString(SOURCE_SYMBOL_IN_LIBRARY);

                if (sourceSymbolInLibrary != null){

                        setSource(new URL(getSymbolLibraryURL().toString()+sourceSymbolInLibrary));

                } else {

                        setSource(state.getURL(SOURCE));

                }

        } catch (Exception e) {

            throw new PersistenceCantSetSourceException(e);

        }

        }

        public void saveToState(PersistentState state) throws PersistenceException {

            if (isLibrarySymbol()){

                    state.set(SOURCE_SYMBOL_IN_LIBRARY, getSourceSymbolInLibrary());

            } else {

                    state.setNull(SOURCE_SYMBOL_IN_LIBRARY);

            }

        state.set(SOURCE, source);

        }

    public static class RegisterPersistence implements Callable {

        public Object call() throws Exception {

            PersistenceManager manager = ToolsLocator.getPersistenceManager();

            if( manager.getDefinition(IMAGE_STYLE_PERSISTENCE_DEFINITION_NAME)==null ) {

                DynStruct definition = manager.addDefinition(

                    ImageStyle.class,

                    IMAGE_STYLE_PERSISTENCE_DEFINITION_NAME,

                    IMAGE_STYLE_PERSISTENCE_DEFINITION_NAME+" Persistence definition",

                    null, 

                    null

                );

                // Extend the Style base definition

                definition.extend(manager.getDefinition(BACKGROUND_FILE_STYLE_PERSISTENCE_DEFINITION_NAME));

                definition.addDynFieldURL(SOURCE).setMandatory(true);

                definition.addDynFieldString(SOURCE_SYMBOL_IN_LIBRARY).setMandatory(false);

            }

            return Boolean.TRUE;

        }

    }

}