Application: gvSIG desktop

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

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

 * MA  02110-1301, USA.

 * 

 */

package org.gvsig.symbology.fmap.mapcontext.rendering.symbol.marker.impl;

import java.awt.BasicStroke;

import java.awt.Graphics2D;

import java.awt.geom.AffineTransform;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.primitive.GeneralPathX;

import org.gvsig.fmap.geom.primitive.Point;

import org.gvsig.fmap.mapcontext.MapContext;

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

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

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.marker.IArrowMarkerSymbol;

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.task.Cancellable;

import org.gvsig.tools.util.Callable;

/**

 * @author 2005-2008 jaume dominguez faus - jaume.dominguez@iver.es

 * @author 2009-     <a href="cordinyana@gvsig.org">C?sar Ordi?ana</a> - gvSIG team

 */

public class ArrowMarkerSymbol extends AbstractMarkerSymbol implements CartographicSupport, IArrowMarkerSymbol {

        public static final String ARROW_MARKER_SYMBOL_DYNCLASS_NAME = "ArrowMarkerSymbol";

        private static final String FIELD_SHARPNESS = "sharpness"; 

        private ArrowMarkerSymbol symSel;

        private double sharpeness;

        public ISymbol getSymbolForSelection() {

                if (symSel == null) {

                        symSel = new ArrowMarkerSymbol();

                        symSel.setColor(MapContext.getSelectionColor());

                }

                return symSel;

        }

        public String getClassName() {

                return getClass().getName();

        }

        /**

         * To get the sharpeness attribute.It will determine the final form of the arrow

         * @return

         */

        public double getSharpness() {

                return sharpeness;

        }

        /**

         * To set the sharpeness.It will determine the final form of the arrow

         * @param sharpeness, the value of the arrow's edge angle IN RADIANS

         * @see #getSharpeness()

         */

        public void setSharpness(double sharpeness) {

                this.sharpeness = sharpeness;

        }

        public void draw(Graphics2D g, AffineTransform affineTransform,

                        Geometry geom, Feature feature, Cancellable cancel) {

                if (geom == null) {

                        return;

                }

                Point p = (Point) geom;

                double radian_half_sharpeness = Math.toRadians(getSharpness()*.5); //

                double size = getSize();

                double halfHeight = size * Math.tan(radian_half_sharpeness);

                double theta = getRotation();

                g.setColor(getColor());

                g.setStroke(new BasicStroke());

                AffineTransform newAf = (AffineTransform)affineTransform.clone();

                newAf.translate(p.getX(), p.getY());

                newAf.rotate(theta);

                GeneralPathX gp = new GeneralPathX();

                gp.moveTo(0, 0);

                gp.lineTo(size, -halfHeight);

                gp.lineTo(size, halfHeight);

                gp.closePath();

                gp.transform(newAf);

                g.fill(gp);

        }

        public Object clone() throws CloneNotSupportedException {

                ArrowMarkerSymbol copy  = (ArrowMarkerSymbol) super.clone();

                // Clone the selection symbol

                if (symSel != null) {

                        copy.symSel = (ArrowMarkerSymbol) symSel.clone();

                }

                return copy;

        }

        public void loadFromState(PersistentState state)

                        throws PersistenceException {

                // Set parent fill symbol properties

                super.loadFromState(state);

                // Set own properties

                setSharpness(state.getDouble(FIELD_SHARPNESS));

        }

        public void saveToState(PersistentState state) throws PersistenceException {

                // Save parent fill symbol properties

                super.saveToState(state);

                // Save own properties

                state.set(FIELD_SHARPNESS, getSharpness());

        }

        public static class RegisterPersistence implements Callable {

                public Object call() throws Exception {

                        PersistenceManager manager = ToolsLocator.getPersistenceManager();

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

                                DynStruct definition = manager.addDefinition(

                                                ArrowMarkerSymbol.class,

                                                ARROW_MARKER_SYMBOL_DYNCLASS_NAME,

                                                ARROW_MARKER_SYMBOL_DYNCLASS_NAME+" Persistence definition",

                                                null, 

                                                null

                                );

                                // Extend the FillSymbol base definition

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

                                // Sharpeness

                                definition.addDynFieldDouble(FIELD_SHARPNESS).setMandatory(true);

                        }

                        return Boolean.TRUE;

                }

        }

}