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.labeling.placements;

import java.util.ArrayList;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.Geometry.TYPES;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontext.rendering.legend.styling.ILabelClass;

import org.gvsig.fmap.mapcontext.rendering.legend.styling.IPlacementConstraints;

import org.gvsig.symbology.fmap.mapcontext.rendering.legend.styling.LabelLocationMetrics;

import org.gvsig.tools.task.Cancellable;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class LinePlacementAtBest extends CompoundLabelPlacement {

        private static Logger logger = LoggerFactory.getLogger(LinePlacementAtBest.class);

        static private ILabelPlacement[] pl = new ILabelPlacement[] {

                new LinePlacementInTheMiddle(),

                new LinePlacementAtExtremities()

        };

        public LinePlacementAtBest() {

                super(pl);

                // a patch just to keep in mind the end of the lines

        }

        public ArrayList<LabelLocationMetrics> guess(ILabelClass lc,

                        Geometry geom, IPlacementConstraints constraints,

                        double cartographicSymbolSize, Cancellable cancel, ViewPort vp) {

                if (cancel.isCanceled()) {

            return CannotPlaceLabel.NO_PLACES;

        }

                ArrayList<LabelLocationMetrics> llc = super.guess(lc, geom, constraints, cartographicSymbolSize, cancel,vp);

                if (constraints instanceof AbstractPlacementConstraints) {

                        AbstractPlacementConstraints clone;

                        try {

                                clone = (AbstractPlacementConstraints) ((AbstractPlacementConstraints) constraints).clone();

                                clone.setLocationAlongTheLine(IPlacementConstraints.AT_THE_END_OF_THE_LINE);

                                llc.addAll(pl[1].guess(lc, geom, clone, cartographicSymbolSize, cancel,vp));

                        } catch (CloneNotSupportedException e) {

                                // this should never happen but

                                // anyway a warning does not hurt anyone

                                logger.info("Couldn't clone "+constraints.getClass().getName(), e);

                        }

                }

                return llc;

        }

    @Override

        public boolean isSuitableFor(

                        IPlacementConstraints placementConstraints,

                        int shapeType) {

        GeometryManager geomManager = GeometryLocator.getGeometryManager();

        if( geomManager.isSubtype(TYPES.CURVE, shapeType) ||

            geomManager.isSubtype(TYPES.MULTICURVE, shapeType) ) {

                        return placementConstraints != null && placementConstraints.isAtBestOfLine();

                } else {

                        return false;

                }

        }

}