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 gvSIG Team

 */

@SuppressWarnings("UseSpecificCatch")

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

     */

    @Override

    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 url

     */

    @Override

    public void setSource(URL url) throws IOException {

        source = url;

        img = ImageIO.read(url);

    }

    @Override

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

        if (img != null) {

            double xOffset = 0;

            double yOffset = 0;

            @SuppressWarnings("UnusedAssignment")

            double xScale = 1;

            @SuppressWarnings("UnusedAssignment")

            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);

        }

    }

    @Override

    public boolean isSuitableFor(ISymbol symbol) {

        // TODO Implement it

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

    }

    @Override

    public void drawOutline(Graphics2D g, Rectangle r) throws SymbolDrawingException {

        drawInsideRectangle(g, r);

    }

    @Override

    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);

        }

    }

    @Override

    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 {

        @Override

        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;

        }

    }

}